bdd_test.ts

// Copyright 2018-2025 the Deno authors. MIT license.
import {
  assert,
  assertEquals,
  assertObjectMatch,
  assertRejects,
  assertStrictEquals,
  assertThrows,
} from "@std/assert";
import {
  after,
  afterAll,
  afterEach,
  before,
  beforeAll,
  beforeEach,
  describe,
  it,
} from "./bdd.ts";
import { TestSuiteInternal } from "./_test_suite.ts";
import { assertSpyCall, assertSpyCalls, type Spy, spy, stub } from "./mock.ts";

class TestContext implements Deno.TestContext {
  name: string;
  origin: string;
  steps: TestContext[];
  spies: {
    step: Spy;
  };

  constructor(name: string) {
    this.name = name;
    this.origin = "origin";
    this.spies = {
      step: spy(this, "step"),
    };
    this.steps = [];
  }

  async step(t: Deno.TestStepDefinition): Promise<boolean>;
  async step(
    name: string,
    fn: (t: Deno.TestContext) => void | Promise<void>,
  ): Promise<boolean>;
  async step(
    fn: (t: Deno.TestContext) => void | Promise<void>,
  ): Promise<boolean>;
  async step(
    tOrNameOrFn:
      | Deno.TestStepDefinition
      | string
      | ((t: Deno.TestContext) => void | Promise<void>),
    fn?: (t: Deno.TestContext) => void | Promise<void>,
  ): Promise<boolean> {
    let ignore = false;
    if (typeof tOrNameOrFn === "function") {
      ignore = false;
      fn = tOrNameOrFn;
    } else if (typeof tOrNameOrFn === "object") {
      ignore = tOrNameOrFn.ignore ?? false;
      fn = tOrNameOrFn.fn;
    }

    const name = typeof tOrNameOrFn === "string"
      ? tOrNameOrFn
      : tOrNameOrFn.name;
    const context = new TestContext(name);
    this.steps.push(context);
    if (!ignore) {
      await fn!(context);
    }
    return !ignore;
  }
}

const baseStepOptions: Omit<Deno.TestStepDefinition, "name" | "fn"> = {
  ignore: false,
  sanitizeExit: true,
  sanitizeOps: true,
  sanitizeResources: true,
};

const baseOptions: Omit<Deno.TestDefinition, "name" | "fn"> = {
  ...baseStepOptions,
  only: false,
  permissions: "inherit",
};

interface GlobalContext {
  allTimer: number;
  eachTimer: number;
  x?: number;
  y?: number;
}

let timerIdx = 1;
const timers = new Map<number, number>();
function hookFns() {
  timerIdx = 1;
  timers.clear();
  return {
    beforeAllFn: spy(async function (this: GlobalContext) {
      await Promise.resolve();
      this.allTimer = timerIdx++;
      timers.set(this.allTimer, setTimeout(() => {}, 10000));
    }),
    afterAllFn: spy(async function (this: GlobalContext) {
      await Promise.resolve();
      clearTimeout(timers.get(this.allTimer));
    }),
    beforeEachFn: spy(async function (this: GlobalContext) {
      await Promise.resolve();
      this.eachTimer = timerIdx++;
      timers.set(this.eachTimer, setTimeout(() => {}, 10000));
    }),
    afterEachFn: spy(async function (this: GlobalContext) {
      await Promise.resolve();
      clearTimeout(timers.get(this.eachTimer));
    }),
  };
}

Deno.test("beforeAll(), afterAll(), beforeEach() and afterEach()", async () => {
  using test = stub(Deno, "test");
  const fns = [spy(), spy()] as const;
  const { beforeAllFn, afterAllFn, beforeEachFn, afterEachFn } = hookFns();

  const context = new TestContext("global");
  try {
    beforeAll(beforeAllFn);
    afterAll(afterAllFn);

    beforeEach(beforeEachFn);
    afterEach(afterEachFn);

    assertEquals(it({ name: "example 1", fn: fns[0] }), undefined);
    assertEquals(it({ name: "example 2", fn: fns[1] }), undefined);

    assertSpyCalls(fns[0], 0);
    assertSpyCalls(fns[1], 0);

    assertSpyCall(test, 0);
    const call = test.calls[0];
    const options = call?.args[0] as Deno.TestDefinition;
    assertEquals(Object.keys(options).sort(), ["fn", "name"]);
    assertEquals(options.name, "global");

    const result = options.fn(context);
    assertStrictEquals(Promise.resolve(result), result);
    assertEquals(await result, undefined);
    assertSpyCalls(context.spies.step, 2);
  } finally {
    TestSuiteInternal.reset();
  }

  let fn = fns[0];
  assertSpyCall(fn, 0, {
    self: { allTimer: 1, eachTimer: 2 },
    args: [context.steps[0]],
    returned: undefined,
  });
  assertSpyCalls(fn, 1);

  fn = fns[1];
  assertSpyCall(fn, 0, {
    self: { allTimer: 1, eachTimer: 3 },
    args: [context.steps[1]],
    returned: undefined,
  });
  assertSpyCalls(fn, 1);

  assertSpyCalls(beforeAllFn, 1);
  assertSpyCalls(afterAllFn, 1);
  assertSpyCalls(beforeEachFn, 2);
  assertSpyCalls(afterEachFn, 2);
});

Deno.test("it()", async (t) => {
  /**
   * Asserts that `Deno.test` is called with the correct options for the `it` call in the callback function.
   * This is used to reduce code duplication when testing calling `it` with different call signatures.
   */
  async function assertOptions<T>(
    expectedOptions: Omit<Deno.TestDefinition, "name" | "fn">,
    cb: (fn: Spy) => void,
  ) {
    using test = stub(Deno, "test");
    const fn = spy();
    try {
      cb(fn);

      assertSpyCalls(fn, 0);
      assertSpyCall(test, 0);
      const call = test.calls[0];
      const options = call?.args[0] as Deno.TestDefinition;
      assertEquals(
        Object.keys(options).sort(),
        ["name", "fn", ...Object.keys(expectedOptions)].sort(),
      );
      assertObjectMatch(options, {
        name: "example",
        ...expectedOptions,
      });

      const context = new TestContext("example");
      const result = options.fn(context);
      assertStrictEquals(Promise.resolve(result), result);
      assertEquals(await result, undefined);
      assertSpyCalls(context.spies.step, 0);
      assertSpyCall(fn, 0, {
        self: {},
        args: [context],
        returned: undefined,
      });
    } finally {
      TestSuiteInternal.reset();
    }
  }

  /**
   * Asserts that `Deno.test` is called with just the name and function for the `it` call in the callback function.
   * This is used to reduce code duplication when testing calling `it` with different call signatures.
   */
  async function assertMinimumOptions(
    cb: (fn: Spy) => void,
  ) {
    await assertOptions({}, cb);
  }

  /**
   * Asserts that `Deno.test` is called with all of the options for the `it` call in the callback function.
   * This is used to reduce code duplication when testing calling `it` with different call signatures.
   */
  async function assertAllOptions(
    cb: (fn: Spy) => void,
  ) {
    await assertOptions(baseOptions, cb);
  }

  await t.step("signature 1", async (t) => {
    await t.step(
      "minimum options",
      async () =>
        await assertMinimumOptions((fn) => {
          assertEquals(it({ name: "example", fn }), undefined);
        }),
    );

    await t.step("all options", async () =>
      await assertAllOptions((fn) => {
        assertEquals(
          it({
            name: "example",
            fn,
            ...baseOptions,
          }),
          undefined,
        );
      }));
  });

  await t.step("signature 2", async (t) => {
    await t.step(
      "minimum options",
      async () =>
        await assertMinimumOptions((fn) => {
          assertEquals(it("example", { fn }), undefined);
        }),
    );

    await t.step("all options", async () =>
      await assertAllOptions((fn) => {
        assertEquals(
          it("example", {
            fn,
            ...baseOptions,
          }),
          undefined,
        );
      }));
  });

  await t.step("signature 3", async () =>
    await assertMinimumOptions((fn) => {
      assertEquals(it("example", fn), undefined);
    }));

  await t.step("signature 4", async () =>
    await assertMinimumOptions((fn) => {
      assertEquals(
        it(function example(this: void, ...args) {
          fn.apply(this, args);
        }),
        undefined,
      );
    }));

  await t.step("signature 5", async (t) => {
    await t.step(
      "minimum options",
      async () =>
        await assertMinimumOptions((fn) => {
          assertEquals(it("example", {}, fn), undefined);
        }),
    );

    await t.step("all options", async () =>
      await assertAllOptions((fn) => {
        assertEquals(
          it("example", {
            ...baseOptions,
          }, fn),
          undefined,
        );
      }));
  });

  await t.step("signature 6", async (t) => {
    await t.step(
      "minimum options",
      async () =>
        await assertMinimumOptions((fn) => {
          assertEquals(it({ name: "example" }, fn), undefined);
        }),
    );

    await t.step("all options", async () =>
      await assertAllOptions((fn) => {
        assertEquals(
          it({
            name: "example",
            ...baseOptions,
          }, fn),
          undefined,
        );
      }));
  });

  await t.step("signature 7", async (t) => {
    await t.step(
      "minimum options",
      async () =>
        await assertMinimumOptions((fn) => {
          assertEquals(
            it({}, function example(this: void, ...args) {
              fn.apply(this, args);
            }),
            undefined,
          );
        }),
    );

    await t.step("all options", async () =>
      await assertAllOptions((fn) => {
        assertEquals(
          it({
            ...baseOptions,
          }, function example(this: void, ...args) {
            fn.apply(this, args);
          }),
          undefined,
        );
      }));
  });

  await t.step("only", async (t) => {
    /**
     * Asserts that `Deno.test` is called with just the name, only, and function for the `it.only` call in the callback function.
     * This is used to reduce code duplication when testing calling `it.only` with different call signatures.
     */
    async function assertMinimumOptions(
      cb: (fn: Spy) => void,
    ) {
      await assertOptions({ only: true }, cb);
    }

    /**
     * Asserts that `Deno.test` is called with all of the options for the `it.only` call in the callback function.
     * This is used to reduce code duplication when testing calling `it.only` with different call signatures.
     */
    async function assertAllOptions(
      cb: (fn: Spy) => void,
    ) {
      await assertOptions({ ...baseOptions, only: true }, cb);
    }

    await t.step("signature 1", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fn) => {
            assertEquals(it.only({ name: "example", fn }), undefined);
          }),
      );

      await t.step("all options", async () =>
        await assertAllOptions((fn) => {
          assertEquals(
            it.only({
              name: "example",
              fn,
              ...baseOptions,
            }),
            undefined,
          );
        }));
    });

    await t.step("signature 2", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fn) => {
            assertEquals(it.only("example", { fn }), undefined);
          }),
      );

      await t.step("all options", async () =>
        await assertAllOptions((fn) => {
          assertEquals(
            it.only("example", {
              fn,
              ...baseOptions,
            }),
            undefined,
          );
        }));
    });

    await t.step(
      "signature 3",
      async () =>
        await assertMinimumOptions((fn) => {
          assertEquals(it.only("example", fn), undefined);
        }),
    );

    await t.step(
      "signature 4",
      async () =>
        await assertMinimumOptions((fn) => {
          assertEquals(
            it.only(function example(this: void, ...args) {
              fn.apply(this, args);
            }),
            undefined,
          );
        }),
    );

    await t.step("signature 5", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fn) => {
            assertEquals(it.only("example", {}, fn), undefined);
          }),
      );

      await t.step("all options", async () =>
        await assertAllOptions((fn) => {
          assertEquals(
            it.only("example", {
              ...baseOptions,
            }, fn),
            undefined,
          );
        }));
    });

    await t.step("signature 6", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fn) => {
            assertEquals(it.only({ name: "example" }, fn), undefined);
          }),
      );

      await t.step("all options", async () =>
        await assertAllOptions((fn) => {
          assertEquals(
            it.only({
              name: "example",
              ...baseOptions,
            }, fn),
            undefined,
          );
        }));
    });

    await t.step("signature 7", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fn) => {
            assertEquals(
              it.only({}, function example(this: void, ...args) {
                fn.apply(this, args);
              }),
              undefined,
            );
          }),
      );

      await t.step("all options", async () =>
        await assertAllOptions((fn) => {
          assertEquals(
            it.only({
              ...baseOptions,
            }, function example(this: void, ...args) {
              fn.apply(this, args);
            }),
            undefined,
          );
        }));
    });
  });

  await t.step("ignore", async (t) => {
    /**
     * Asserts that `Deno.test` is called with just the name, ignore, and function for the `it.ignore` call in the callback function.
     * This is used to reduce code duplication when testing calling `it.ignore` with different call signatures.
     */
    async function assertMinimumOptions(
      cb: (fn: Spy) => void,
    ) {
      await assertOptions({ ignore: true }, cb);
    }

    /**
     * Asserts that `Deno.test` is called with all of the options for the `it.ignore` call in the callback function.
     * This is used to reduce code duplication when testing calling `it.ignore` with different call signatures.
     */
    async function assertAllOptions(
      cb: (fn: Spy) => void,
    ) {
      await assertOptions({ ...baseOptions, ignore: true }, cb);
    }

    await t.step("signature 1", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fn) => {
            assertEquals(it.ignore({ name: "example", fn }), undefined);
          }),
      );

      await t.step(
        "minimum options (skip)",
        async () =>
          await assertMinimumOptions((fn) => {
            it.skip({ name: "example", fn });
          }),
      );

      await t.step("all options", async () =>
        await assertAllOptions((fn) => {
          assertEquals(
            it.ignore({
              name: "example",
              fn,
              ...baseOptions,
            }),
            undefined,
          );
        }));
    });

    await t.step("signature 2", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fn) => {
            assertEquals(it.ignore("example", { fn }), undefined);
          }),
      );

      await t.step("all options", async () =>
        await assertAllOptions((fn) => {
          assertEquals(
            it.ignore("example", {
              fn,
              ...baseOptions,
            }),
            undefined,
          );
        }));
    });

    await t.step(
      "signature 3",
      async () =>
        await assertMinimumOptions((fn) => {
          assertEquals(it.ignore("example", fn), undefined);
        }),
    );

    await t.step(
      "signature 4",
      async () =>
        await assertMinimumOptions((fn) => {
          assertEquals(
            it.ignore(function example(this: void, ...args) {
              fn.apply(this, args);
            }),
            undefined,
          );
        }),
    );

    await t.step("signature 5", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fn) => {
            assertEquals(it.ignore("example", {}, fn), undefined);
          }),
      );

      await t.step("all options", async () =>
        await assertAllOptions((fn) => {
          assertEquals(
            it.ignore("example", {
              ...baseOptions,
            }, fn),
            undefined,
          );
        }));
    });

    await t.step("signature 6", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fn) => {
            assertEquals(it.ignore({ name: "example" }, fn), undefined);
          }),
      );

      await t.step("all options", async () =>
        await assertAllOptions((fn) => {
          assertEquals(
            it.ignore({
              name: "example",
              ...baseOptions,
            }, fn),
            undefined,
          );
        }));
    });

    await t.step("signature 7", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fn) => {
            assertEquals(
              it.ignore({}, function example(this: void, ...args) {
                fn.apply(this, args);
              }),
              undefined,
            );
          }),
      );

      await t.step("all options", async () =>
        await assertAllOptions((fn) => {
          assertEquals(
            it.ignore({
              ...baseOptions,
            }, function example(this: void, ...args) {
              fn.apply(this, args);
            }),
            undefined,
          );
        }));
    });
  });
});

Deno.test("describe()", async (t) => {
  /**
   * Asserts that `Deno.test` is called with the correct options for the `describe` call in the callback function.
   * In addition to that, it asserts that the individual test cases registered with `it` use the test step API correctly.
   * This is used to reduce code duplication when testing calling `describe` with different call signatures.
   */
  async function assertOptions(
    expectedOptions: Omit<Deno.TestDefinition, "name" | "fn">,
    cb: (fns: readonly [Spy, Spy]) => void,
  ) {
    using test = stub(Deno, "test");
    const fns = [spy(), spy()] as const;
    try {
      cb(fns);

      assertSpyCall(test, 0);
      const call = test.calls[0];
      const options = call?.args[0] as Deno.TestDefinition;
      assertEquals(
        Object.keys(options).sort(),
        ["name", "fn", ...Object.keys(expectedOptions)].sort(),
      );
      assertObjectMatch(options, {
        name: "example",
        ...expectedOptions,
      });

      assertSpyCalls(fns[0], 0);
      assertSpyCalls(fns[1], 0);

      const context = new TestContext("example");
      const result = options.fn(context);
      assertStrictEquals(Promise.resolve(result), result);
      assertEquals(await result, undefined);
      assertSpyCalls(context.spies.step, 2);

      let fn = fns[0];
      assertSpyCall(fn, 0, {
        self: {},
        args: [context.steps[0]],
        returned: undefined,
      });

      fn = fns[1];
      assertSpyCall(fn, 0, {
        self: {},
        args: [context.steps[1]],
        returned: undefined,
      });
      assertSpyCalls(fn, 1);
    } finally {
      TestSuiteInternal.reset();
    }
  }

  /**
   * Asserts that `Deno.test` is called with just the name and function for the `describe` call in the callback function.
   * In addition to that, it asserts that the individual test cases registered with `it` use the test step API correctly.
   * This is used to reduce code duplication when testing calling `describe` with different call signatures.
   */
  async function assertMinimumOptions(
    cb: (fns: readonly [Spy, Spy]) => void,
  ) {
    await assertOptions({}, cb);
  }

  /**
   * Asserts that `Deno.test` is called with all of the options for the `describe` call in the callback function.
   * In addition to that, it asserts that the individual test cases registered with `it` use the test step API correctly.
   * This is used to reduce code duplication when testing calling `describe` with different call signatures.
   */
  async function assertAllOptions(
    cb: (fns: readonly [Spy, Spy]) => void,
  ) {
    await assertOptions({ ...baseOptions }, cb);
  }

  await t.step("signature 1", async (t) => {
    await t.step(
      "minimum options",
      async () =>
        await assertMinimumOptions((fns) => {
          const suite = describe({ name: "example" });
          assert(suite && typeof suite.symbol === "symbol");
          assertEquals(it({ suite, name: "a", fn: fns[0] }), undefined);
          assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
        }),
    );

    await t.step("all options", async () =>
      await assertAllOptions((fns) => {
        const suite = describe({
          name: "example",
          fn: () => {
            assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          },
          ...baseOptions,
        });
        assert(suite && typeof suite.symbol === "symbol");
        assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
      }));
  });

  await t.step(
    "signature 2",
    async () =>
      await assertMinimumOptions((fns) => {
        const suite = describe("example");
        assert(suite && typeof suite.symbol === "symbol");
        assertEquals(it({ suite, name: "a", fn: fns[0] }), undefined);
        assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
      }),
  );

  await t.step("signature 3", async (t) => {
    await t.step(
      "minimum options",
      async () =>
        await assertMinimumOptions((fns) => {
          const suite = describe("example", {});
          assert(suite && typeof suite.symbol === "symbol");
          assertEquals(it({ suite, name: "a", fn: fns[0] }), undefined);
          assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
        }),
    );

    await t.step("all options", async () =>
      await assertAllOptions((fns) => {
        const suite = describe("example", {
          fn: () => {
            assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          },
          ...baseOptions,
        });
        assert(suite && typeof suite.symbol === "symbol");
        assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
      }));
  });

  await t.step(
    "signature 4",
    async () =>
      await assertMinimumOptions((fns) => {
        const suite = describe("example", () => {
          assertEquals(it({ name: "a", fn: fns[0] }), undefined);
        });
        assert(suite && typeof suite.symbol === "symbol");
        assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
      }),
  );

  await t.step(
    "signature 5",
    async () =>
      await assertMinimumOptions((fns) => {
        const suite = describe(function example() {
          assertEquals(it({ name: "a", fn: fns[0] }), undefined);
        });
        assert(suite && typeof suite.symbol === "symbol");
        assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
      }),
  );

  await t.step("signature 6", async (t) => {
    await t.step(
      "minimum options",
      async () =>
        await assertMinimumOptions((fns) => {
          const suite = describe("example", {}, () => {
            assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          });
          assert(suite && typeof suite.symbol === "symbol");
          assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
        }),
    );

    await t.step("all options", async () =>
      await assertAllOptions((fns) => {
        const suite = describe("example", {
          ...baseOptions,
        }, () => {
          assertEquals(it({ name: "a", fn: fns[0] }), undefined);
        });
        assert(suite && typeof suite.symbol === "symbol");
        assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
      }));
  });

  await t.step("signature 7", async (t) => {
    await t.step(
      "minimum options",
      async () =>
        await assertMinimumOptions((fns) => {
          const suite = describe({ name: "example" }, () => {
            assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          });
          assert(suite && typeof suite.symbol === "symbol");
          assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
        }),
    );

    await t.step("all options", async () =>
      await assertAllOptions((fns) => {
        const suite = describe({
          name: "example",
          ...baseOptions,
        }, () => {
          assertEquals(it({ name: "a", fn: fns[0] }), undefined);
        });
        assert(suite && typeof suite.symbol === "symbol");
        assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
      }));
  });

  await t.step("signature 8", async (t) => {
    await t.step(
      "minimum options",
      async () =>
        await assertMinimumOptions((fns) => {
          const suite = describe({}, function example() {
            assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          });
          assert(suite && typeof suite.symbol === "symbol");
          assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
        }),
    );

    await t.step("all options", async () =>
      await assertAllOptions((fns) => {
        const suite = describe({
          ...baseOptions,
        }, function example() {
          assertEquals(it({ name: "a", fn: fns[0] }), undefined);
        });
        assert(suite && typeof suite.symbol === "symbol");
        assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
      }));
  });

  await t.step("only", async (t) => {
    /**
     * Asserts that `Deno.test` is called with just the name, only, and function for the `describe.only` call in the callback function.
     * In addition to that, it asserts that the individual test cases registered with `it` use the test step API correctly.
     * This is used to reduce code duplication when testing calling `describe.only` with different call signatures.
     */
    async function assertMinimumOptions(
      cb: (fns: readonly [Spy, Spy]) => void,
    ) {
      await assertOptions({ only: true }, cb);
    }

    /**
     * Asserts that `Deno.test` is called with all of the options for the `describe.only` call in the callback function.
     * In addition to that, it asserts that the individual test cases registered with `it` use the test step API correctly.
     * This is used to reduce code duplication when testing calling `describe.only` with different call signatures.
     */
    async function assertAllOptions(
      cb: (fns: readonly [Spy, Spy]) => void,
    ) {
      await assertOptions({ ...baseOptions, only: true }, cb);
    }

    await t.step("signature 1", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fns) => {
            const suite = describe.only({ name: "example" });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "a", fn: fns[0] }), undefined);
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );

      await t.step(
        "all options",
        async () =>
          await assertAllOptions((fns) => {
            const suite = describe.only({
              name: "example",
              fn: () => {
                assertEquals(it({ name: "a", fn: fns[0] }), undefined);
              },
              ...baseOptions,
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );
    });

    await t.step(
      "signature 2",
      async () =>
        await assertMinimumOptions((fns) => {
          const suite = describe.only("example");
          assert(suite && typeof suite.symbol === "symbol");
          assertEquals(it({ suite, name: "a", fn: fns[0] }), undefined);
          assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
        }),
    );

    await t.step("signature 3", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fns) => {
            const suite = describe.only("example", {});
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "a", fn: fns[0] }), undefined);
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );

      await t.step(
        "all options",
        async () =>
          await assertAllOptions((fns) => {
            const suite = describe.only("example", {
              fn: () => {
                assertEquals(it({ name: "a", fn: fns[0] }), undefined);
              },
              ...baseOptions,
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );
    });

    await t.step(
      "signature 4",
      async () =>
        await assertMinimumOptions((fns) => {
          const suite = describe.only("example", () => {
            assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          });
          assert(suite && typeof suite.symbol === "symbol");
          assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
        }),
    );

    await t.step(
      "signature 5",
      async () =>
        await assertMinimumOptions((fns) => {
          const suite = describe.only(function example() {
            assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          });
          assert(suite && typeof suite.symbol === "symbol");
          assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
        }),
    );

    await t.step("signature 6", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fns) => {
            const suite = describe.only("example", {}, () => {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );

      await t.step(
        "all options",
        async () =>
          await assertAllOptions((fns) => {
            const suite = describe.only("example", {
              ...baseOptions,
            }, () => {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );
    });

    await t.step("signature 7", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fns) => {
            const suite = describe.only({ name: "example" }, () => {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );

      await t.step(
        "all options",
        async () =>
          await assertAllOptions((fns) => {
            const suite = describe.only({
              name: "example",
              ...baseOptions,
            }, () => {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );
    });

    await t.step("signature 8", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fns) => {
            const suite = describe.only({}, function example() {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );

      await t.step(
        "all options",
        async () =>
          await assertAllOptions((fns) => {
            const suite = describe.only({
              ...baseOptions,
            }, function example() {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );
    });
  });

  await t.step("ignore", async (t) => {
    /**
     * Asserts that `Deno.test` is called with the correct options for the `describe` call in the callback function.
     * This is used to reduce code duplication when testing calling `describe` with different call signatures.
     */
    async function assertIgnoreOptions(
      expectedOptions: Omit<Deno.TestDefinition, "name" | "fn">,
      cb: (fns: readonly [Spy, Spy]) => void,
    ) {
      using test = stub(Deno, "test");
      const fns = [spy(), spy()] as const;
      try {
        cb(fns);
        assertSpyCall(test, 0);
        const call = test.calls[0];
        const options = call?.args[0] as Deno.TestDefinition;
        assertEquals(
          Object.keys(options).sort(),
          ["name", "fn", ...Object.keys(expectedOptions)].sort(),
        );
        assertObjectMatch(options, {
          name: "example",
          ...expectedOptions,
        });

        assertSpyCalls(fns[0], 0);
        assertSpyCalls(fns[1], 0);

        const context = new TestContext("example");
        const result = options.fn(context);
        assertStrictEquals(Promise.resolve(result), result);
        assertEquals(await result, undefined);
        assertSpyCalls(context.spies.step, 0);

        assertSpyCalls(fns[0], 0);
        assertSpyCalls(fns[1], 0);
      } finally {
        TestSuiteInternal.reset();
      }
    }
    /**
     * Asserts that `Deno.test` is called with just the name, ignore, and function for the `describe.ignore` call in the callback function.
     * In addition to that, it asserts that the individual test cases registered with `it` use the test step API correctly.
     * This is used to reduce code duplication when testing calling `describe.ignore` with different call signatures.
     */
    async function assertMinimumOptions(
      cb: (fns: readonly [Spy, Spy]) => void,
    ) {
      await assertIgnoreOptions({ ignore: true }, cb);
    }

    /**
     * Asserts that `Deno.test` is called with all of the options for the `describe.ignore` call in the callback function.
     * In addition to that, it asserts that the individual test cases registered with `it` use the test step API correctly.
     * This is used to reduce code duplication when testing calling `describe.ignore` with different call signatures.
     */
    async function assertAllOptions(
      cb: (fns: readonly [Spy, Spy]) => void,
    ) {
      await assertIgnoreOptions({ ...baseOptions, ignore: true }, cb);
    }

    await t.step("signature 1", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fns) => {
            const suite = describe.ignore({ name: "example" });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "a", fn: fns[0] }), undefined);
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );

      await t.step(
        "minimum options (skip)",
        async () =>
          await assertMinimumOptions((fns) => {
            const suite = describe.skip({ name: "example" });
            assert(suite && typeof suite.symbol === "symbol");
            it({ suite, name: "a", fn: fns[0] });
            it({ suite, name: "b", fn: fns[1] });
          }),
      );

      await t.step(
        "all options",
        async () =>
          await assertAllOptions((fns) => {
            const suite = describe.ignore({
              name: "example",
              fn: () => {
                assertEquals(it({ name: "a", fn: fns[0] }), undefined);
              },
              ...baseOptions,
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );
    });

    await t.step(
      "signature 2",
      async () =>
        await assertMinimumOptions((fns) => {
          const suite = describe.ignore("example");
          assert(suite && typeof suite.symbol === "symbol");
          assertEquals(it({ suite, name: "a", fn: fns[0] }), undefined);
          assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
        }),
    );

    await t.step("signature 3", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fns) => {
            const suite = describe.ignore("example", {});
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "a", fn: fns[0] }), undefined);
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );

      await t.step(
        "all options",
        async () =>
          await assertAllOptions((fns) => {
            const suite = describe.ignore("example", {
              fn: () => {
                assertEquals(it({ name: "a", fn: fns[0] }), undefined);
              },
              ...baseOptions,
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );
    });

    await t.step(
      "signature 4",
      async () =>
        await assertMinimumOptions((fns) => {
          const suite = describe.ignore("example", () => {
            assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          });
          assert(suite && typeof suite.symbol === "symbol");
          assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
        }),
    );

    await t.step(
      "signature 5",
      async () =>
        await assertMinimumOptions((fns) => {
          const suite = describe.ignore(function example() {
            assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          });
          assert(suite && typeof suite.symbol === "symbol");
          assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
        }),
    );

    await t.step("signature 6", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fns) => {
            const suite = describe.ignore("example", {}, () => {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );

      await t.step(
        "all options",
        async () =>
          await assertAllOptions((fns) => {
            const suite = describe.ignore("example", {
              ...baseOptions,
            }, () => {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );
    });

    await t.step("signature 7", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fns) => {
            const suite = describe.ignore({ name: "example" }, () => {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );

      await t.step(
        "all options",
        async () =>
          await assertAllOptions((fns) => {
            const suite = describe.ignore({
              name: "example",
              ...baseOptions,
            }, () => {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );
    });

    await t.step("signature 8", async (t) => {
      await t.step(
        "minimum options",
        async () =>
          await assertMinimumOptions((fns) => {
            const suite = describe.ignore({}, function example() {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );

      await t.step(
        "all options",
        async () =>
          await assertAllOptions((fns) => {
            const suite = describe.ignore({
              ...baseOptions,
            }, function example() {
              assertEquals(it({ name: "a", fn: fns[0] }), undefined);
            });
            assert(suite && typeof suite.symbol === "symbol");
            assertEquals(it({ suite, name: "b", fn: fns[1] }), undefined);
          }),
      );
    });
  });

  await t.step("nested only", async (t) => {
    /**
     * Asserts that when only is used on a nested `describe` or `it` call, it will be the only test case or suite that runs in the file.
     * This is used to reduce code duplication when testing calling `describe.ignore` with different call signatures.
     */
    async function assertOnly(
      cb: (fns: readonly [Spy, Spy, Spy]) => void,
    ) {
      using test = stub(Deno, "test");
      const fns = [spy(), spy(), spy()] as const;
      try {
        cb(fns);

        assertSpyCall(test, 0);
        const call = test.calls[0];
        const options = call?.args[0] as Deno.TestDefinition;
        assertEquals(
          Object.keys(options).sort(),
          ["name", "only", "fn"].sort(),
        );
        assertObjectMatch(options, {
          name: "example",
          only: true,
        });

        assertSpyCalls(fns[0], 0);
        assertSpyCalls(fns[1], 0);

        const context = new TestContext("example");
        const result = options.fn(context);
        assertStrictEquals(Promise.resolve(result), result);
        assertEquals(await result, undefined);
        assertSpyCalls(context.spies.step, 1);

        let fn = fns[0];
        assertSpyCalls(fn, 0);

        fn = fns[1];
        assertSpyCall(fn, 0, {
          self: {},
          returned: undefined,
        });
        assertSpyCalls(fn, 1);

        fn = fns[2];
        assertSpyCalls(fn, 0);
      } finally {
        TestSuiteInternal.reset();
      }
    }

    await t.step("it", async () =>
      await assertOnly((fns) => {
        describe("example", () => {
          assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          assertEquals(it.only({ name: "b", fn: fns[1] }), undefined);
          assertEquals(it({ name: "c", fn: fns[2] }), undefined);
        });
      }));

    await t.step("nested it", async () =>
      await assertOnly((fns) => {
        describe("example", () => {
          assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          describe("nested", () => {
            assertEquals(it.only({ name: "b", fn: fns[1] }), undefined);
          });
          assertEquals(it({ name: "c", fn: fns[2] }), undefined);
        });
      }));

    await t.step("describe", async () =>
      await assertOnly((fns) => {
        describe("example", () => {
          assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          describe.only("nested", () => {
            assertEquals(it({ name: "b", fn: fns[1] }), undefined);
          });
          assertEquals(it({ name: "c", fn: fns[2] }), undefined);
        });
      }));

    await t.step("nested describe", async () =>
      await assertOnly((fns) => {
        describe("example", () => {
          assertEquals(it({ name: "a", fn: fns[0] }), undefined);
          describe("nested", () => {
            describe.only("nested 2", () => {
              assertEquals(it({ name: "b", fn: fns[1] }), undefined);
            });
          });
          assertEquals(it({ name: "c", fn: fns[2] }), undefined);
        });
      }));
  });

  await t.step("flat child only", async (t) => {
    /**
     * Asserts that when only is used on a child `describe` or `it` call, it will be the only test case or suite that runs within the top test suite.
     * This demonstrates the issue where `Deno.test` is called without `only` even though one of its child steps are focused.
     * This is used to reduce code duplication when testing calling `describe.ignore` with different call signatures.
     */
    async function assertOnly(
      cb: (fns: readonly [Spy, Spy, Spy]) => void,
    ) {
      using test = stub(Deno, "test");
      const fns = [spy(), spy(), spy()] as const;
      try {
        cb(fns);

        assertSpyCall(test, 0);
        const call = test.calls[0];
        const options = call?.args[0] as Deno.TestDefinition;
        assertEquals(
          Object.keys(options).sort(),
          ["name", "fn"].sort(),
        );
        assertObjectMatch(options, {
          name: "example",
        });

        assertSpyCalls(fns[0], 0);
        assertSpyCalls(fns[1], 0);

        const context = new TestContext("example");
        const result = options.fn(context);
        assertStrictEquals(Promise.resolve(result), result);
        assertEquals(await result, undefined);
        assertSpyCalls(context.spies.step, 1);

        let fn = fns[0];
        assertSpyCalls(fn, 0);

        fn = fns[1];
        assertSpyCall(fn, 0, {
          self: {},
          returned: undefined,
        });
        assertSpyCalls(fn, 1);

        fn = fns[2];
        assertSpyCalls(fn, 0);
      } finally {
        TestSuiteInternal.reset();
      }
    }

    await t.step("it", async () =>
      await assertOnly((fns) => {
        const suite = describe("example");
        assertEquals(it({ name: "a", suite, fn: fns[0] }), undefined);
        assertEquals(it.only({ name: "b", suite, fn: fns[1] }), undefined);
        assertEquals(it({ name: "c", suite, fn: fns[2] }), undefined);
      }));

    await t.step("deep child it", async () =>
      await assertOnly((fns) => {
        const suite = describe("example");
        assertEquals(it({ name: "a", suite, fn: fns[0] }), undefined);
        const childSuite = describe(suite, "child");
        assertEquals(
          it.only({ name: "b", suite: childSuite, fn: fns[1] }),
          undefined,
        );
        assertEquals(it({ name: "c", suite, fn: fns[2] }), undefined);
      }));

    await t.step("describe", async () =>
      await assertOnly((fns) => {
        const suite = describe("example");
        assertEquals(it({ name: "a", suite, fn: fns[0] }), undefined);
        const childSuite = describe.only(suite, "child");
        assertEquals(
          it({ name: "b", suite: childSuite, fn: fns[1] }),
          undefined,
        );
        assertEquals(it({ name: "c", suite, fn: fns[2] }), undefined);
      }));

    await t.step(
      "deep child describe",
      async () =>
        await assertOnly((fns) => {
          const suite = describe("example");
          assertEquals(it({ name: "a", suite, fn: fns[0] }), undefined);
          const childSuite = describe(suite, "child");
          const child2Suite = describe.only(childSuite, "child 2");
          assertEquals(
            it({ name: "b", suite: child2Suite, fn: fns[1] }),
            undefined,
          );
          assertEquals(it({ name: "c", suite, fn: fns[2] }), undefined);
        }),
    );
  });

  await t.step("with hooks", async (t) => {
    /**
     * Asserts that all the different hook types are called in the correct order when the tests run.
     * This is used to reduce code duplication when testing calling `describe` with different call signatures.
     */
    async function assertHooks(
      cb: (
        options: {
          beforeAllFn: Spy;
          afterAllFn: Spy;
          beforeEachFn: Spy;
          afterEachFn: Spy;
          fns: readonly [Spy, Spy];
        },
      ) => void,
    ) {
      using test = stub(Deno, "test");
      const fns = [spy(), spy()] as const;
      const { beforeAllFn, afterAllFn, beforeEachFn, afterEachFn } = hookFns();

      const context = new TestContext("example");
      try {
        cb({ beforeAllFn, afterAllFn, beforeEachFn, afterEachFn, fns });

        assertSpyCalls(fns[0], 0);
        assertSpyCalls(fns[1], 0);

        assertSpyCall(test, 0);
        const call = test.calls[0];
        const options = call?.args[0] as Deno.TestDefinition;
        assertEquals(Object.keys(options).sort(), ["fn", "name"]);
        assertEquals(options.name, "example");

        const result = options.fn(context);
        assertStrictEquals(Promise.resolve(result), result);
        assertEquals(await result, undefined);
        assertSpyCalls(context.spies.step, 2);
      } finally {
        TestSuiteInternal.reset();
      }

      let fn = fns[0];
      assertSpyCall(fn, 0, {
        self: { allTimer: 1, eachTimer: 2 },
        args: [context.steps[0]],
        returned: undefined,
      });
      assertSpyCalls(fn, 1);

      fn = fns[1];
      assertSpyCall(fn, 0, {
        self: { allTimer: 1, eachTimer: 3 },
        args: [context.steps[1]],
        returned: undefined,
      });
      assertSpyCalls(fn, 1);

      assertSpyCalls(beforeAllFn, 1);
      assertSpyCalls(afterAllFn, 1);
      assertSpyCalls(beforeEachFn, 2);
      assertSpyCalls(afterEachFn, 2);
    }

    await t.step(
      "in callback",
      async () =>
        await assertHooks(
          ({ beforeAllFn, afterAllFn, beforeEachFn, afterEachFn, fns }) => {
            describe("example", () => {
              beforeAll(beforeAllFn);
              afterAll(afterAllFn);

              beforeEach(beforeEachFn);
              afterEach(afterEachFn);

              assertEquals(it({ name: "example 1", fn: fns[0] }), undefined);
              assertEquals(it({ name: "example 2", fn: fns[1] }), undefined);
            });
          },
        ),
    );

    await t.step(
      "in callback (using after, before aliases)",
      async () =>
        await assertHooks(
          ({ beforeAllFn, afterAllFn, beforeEachFn, afterEachFn, fns }) => {
            describe("example", () => {
              before(beforeAllFn);
              after(afterAllFn);

              beforeEach(beforeEachFn);
              afterEach(afterEachFn);

              it({ name: "example 1", fn: fns[0] });
              it({ name: "example 2", fn: fns[1] });
            });
          },
        ),
    );

    await t.step(
      "in options",
      async () =>
        await assertHooks(
          ({ beforeAllFn, afterAllFn, beforeEachFn, afterEachFn, fns }) => {
            describe({
              name: "example",
              beforeAll: beforeAllFn,
              afterAll: afterAllFn,
              beforeEach: beforeEachFn,
              afterEach: afterEachFn,
              fn: () => {
                assertEquals(
                  it({ name: "example 1", fn: fns[0] }),
                  undefined,
                );
                assertEquals(
                  it({ name: "example 2", fn: fns[1] }),
                  undefined,
                );
              },
            });
          },
        ),
    );

    await t.step(
      "nested",
      async () => {
        using test = stub(Deno, "test");
        const fns = [spy(), spy()] as const;
        const { beforeAllFn, afterAllFn, beforeEachFn, afterEachFn } =
          hookFns();

        const context = new TestContext("example");
        try {
          describe("example", () => {
            beforeAll(beforeAllFn);
            afterAll(afterAllFn);

            beforeEach(beforeEachFn);
            afterEach(afterEachFn);

            describe("nested", () => {
              assertEquals(it({ name: "example 1", fn: fns[0] }), undefined);
              assertEquals(it({ name: "example 2", fn: fns[1] }), undefined);
            });
          });

          assertSpyCalls(fns[0], 0);
          assertSpyCalls(fns[1], 0);

          assertSpyCall(test, 0);
          const call = test.calls[0];
          const options = call?.args[0] as Deno.TestDefinition;
          assertEquals(Object.keys(options).sort(), ["fn", "name"]);
          assertEquals(options.name, "example");

          const result = options.fn(context);
          assertStrictEquals(Promise.resolve(result), result);
          assertEquals(await result, undefined);
          assertSpyCalls(context.spies.step, 1);

          assertStrictEquals(Promise.resolve(result), result);
          assertEquals(await result, undefined);
          assertSpyCalls(context.steps[0]!.spies.step, 2);
        } finally {
          TestSuiteInternal.reset();
        }

        let fn = fns[0];
        assertSpyCall(fn, 0, {
          self: { allTimer: 1, eachTimer: 2 },
          args: [context.steps[0]!.steps[0]],
          returned: undefined,
        });
        assertSpyCalls(fn, 1);

        fn = fns[1];
        assertSpyCall(fn, 0, {
          self: { allTimer: 1, eachTimer: 3 },
          args: [context.steps[0]!.steps[1]],
          returned: undefined,
        });
        assertSpyCalls(fn, 1);

        assertSpyCalls(beforeAllFn, 1);
        assertSpyCalls(afterAllFn, 1);
        assertSpyCalls(beforeEachFn, 2);
        assertSpyCalls(afterEachFn, 2);
      },
    );

    interface NestedContext extends GlobalContext {
      allTimerNested: number;
      eachTimerNested: number;
      x: number;
      y: number;
    }

    await t.step(
      "nested with hooks",
      async () => {
        using test = stub(Deno, "test");
        const fns = [
          spy(function (this: NestedContext) {
            this.x = 2;
          }),
          spy(function (this: NestedContext) {
            this.y = 3;
          }),
        ] as const;
        const { beforeAllFn, afterAllFn, beforeEachFn, afterEachFn } =
          hookFns();
        const beforeAllFnNested = spy(async function (this: NestedContext) {
          await Promise.resolve();
          this.x = 1;
          this.allTimerNested = timerIdx++;
          timers.set(
            this.allTimerNested,
            setTimeout(() => {}, 10000),
          );
        });
        const afterAllFnNested = spy(
          async function (this: NestedContext) {
            await Promise.resolve();
            clearTimeout(timers.get(this.allTimerNested));
          },
        );
        const beforeEachFnNested = spy(async function (this: NestedContext) {
          await Promise.resolve();
          this.y = 2;
          this.eachTimerNested = timerIdx++;
          timers.set(
            this.eachTimerNested,
            setTimeout(() => {}, 10000),
          );
        });
        const afterEachFnNested = spy(
          async function (this: NestedContext) {
            await Promise.resolve();
            clearTimeout(timers.get(this.eachTimerNested));
          },
        );

        const context = new TestContext("example");
        try {
          describe("example", () => {
            beforeAll(beforeAllFn);
            afterAll(afterAllFn);

            beforeEach(beforeEachFn);
            afterEach(afterEachFn);

            describe("nested", () => {
              beforeAll(beforeAllFnNested);
              afterAll(afterAllFnNested);

              beforeEach(beforeEachFnNested);
              afterEach(afterEachFnNested);

              assertEquals(it({ name: "example 1", fn: fns[0] }), undefined);
              assertEquals(it({ name: "example 2", fn: fns[1] }), undefined);
            });
          });

          assertSpyCalls(fns[0], 0);
          assertSpyCalls(fns[1], 0);

          assertSpyCall(test, 0);
          const call = test.calls[0];
          const options = call?.args[0] as Deno.TestDefinition;
          assertEquals(Object.keys(options).sort(), ["fn", "name"]);
          assertEquals(options.name, "example");

          const result = options.fn(context);
          assertStrictEquals(Promise.resolve(result), result);
          assertEquals(await result, undefined);
          assertSpyCalls(context.spies.step, 1);

          assertStrictEquals(Promise.resolve(result), result);
          assertEquals(await result, undefined);
          assertSpyCalls(context.steps[0]!.spies.step, 2);
        } finally {
          TestSuiteInternal.reset();
        }

        let fn = fns[0];
        assertSpyCall(fn, 0, {
          self: {
            allTimer: 1,
            allTimerNested: 2,
            eachTimer: 3,
            eachTimerNested: 4,
            x: 2,
            y: 2,
          },
          args: [context.steps[0]!.steps[0]],
          returned: undefined,
        });
        assertSpyCalls(fn, 1);

        fn = fns[1];
        assertSpyCall(fn, 0, {
          self: {
            allTimer: 1,
            allTimerNested: 2,
            eachTimer: 5,
            eachTimerNested: 6,
            x: 1,
            y: 3,
          },
          args: [context.steps[0]!.steps[1]],
          returned: undefined,
        });
        assertSpyCalls(fn, 1);

        assertSpyCalls(beforeAllFn, 1);

        assertSpyCall(afterAllFn, 0, {
          self: {
            allTimer: 1,
          } as GlobalContext,
        });
        assertSpyCalls(afterAllFn, 1);

        assertSpyCalls(beforeEachFn, 2);

        assertSpyCall(afterEachFn, 0, {
          self: {
            allTimer: 1,
            allTimerNested: 2,
            eachTimer: 3,
            eachTimerNested: 4,
            x: 2,
            y: 2,
          } as NestedContext,
        });
        assertSpyCall(afterEachFn, 1, {
          self: {
            allTimer: 1,
            allTimerNested: 2,
            eachTimer: 5,
            eachTimerNested: 6,
            x: 1,
            y: 3,
          } as NestedContext,
        });
        assertSpyCalls(afterEachFn, 2);

        assertSpyCalls(beforeAllFnNested, 1);

        assertSpyCall(afterAllFnNested, 0, {
          self: {
            allTimer: 1,
            allTimerNested: 2,
            x: 1,
          } as NestedContext,
        });
        assertSpyCalls(afterAllFnNested, 1);

        assertSpyCalls(beforeEachFnNested, 2);

        assertSpyCall(afterEachFnNested, 0, {
          self: {
            allTimer: 1,
            allTimerNested: 2,
            eachTimer: 3,
            eachTimerNested: 4,
            x: 2,
            y: 2,
          },
        });
        assertSpyCall(afterEachFnNested, 1, {
          self: {
            allTimer: 1,
            allTimerNested: 2,
            eachTimer: 5,
            eachTimerNested: 6,
            x: 1,
            y: 3,
          },
        });
        assertSpyCalls(afterEachFnNested, 2);
      },
    );
  });

  await t.step(
    "mutiple hook calls",
    async () => {
      using test = stub(Deno, "test");
      const context = new TestContext("example");
      const beforeAllFn = spy();
      const afterAllFn = spy();
      const beforeEachFn = spy();
      const afterEachFn = spy();

      const nested = {
        beforeAllFn: spy(),
        afterAllFn: spy(),
        beforeEachFn: spy(),
        afterEachFn: spy(),
      };
      try {
        describe("example multiple hooks", () => {
          beforeAll(beforeAllFn);
          beforeAll(beforeAllFn);
          afterAll(afterAllFn);
          afterAll(afterAllFn);
          beforeEach(beforeEachFn);
          beforeEach(beforeEachFn);
          afterEach(afterEachFn);
          afterEach(afterEachFn);

          describe("nested", () => {
            beforeAll(nested.beforeAllFn);
            beforeAll(nested.beforeAllFn);
            afterAll(nested.afterAllFn);
            afterAll(nested.afterAllFn);
            beforeEach(nested.beforeEachFn);
            beforeEach(nested.beforeEachFn);
            afterEach(nested.afterEachFn);
            afterEach(nested.afterEachFn);
            it({ name: "example 1", fn() {} });
            it({ name: "example 2", fn() {} });
          });
        });
        const call = test.calls[0];
        const options = call?.args[0] as Deno.TestDefinition;
        await options.fn(context);
      } finally {
        TestSuiteInternal.reset();
      }

      assertSpyCalls(beforeAllFn, 2);
      assertSpyCalls(afterAllFn, 2);
      assertSpyCalls(beforeEachFn, 4);
      assertSpyCalls(afterEachFn, 4);

      assertSpyCalls(nested.beforeAllFn, 2);
      assertSpyCalls(nested.afterAllFn, 2);
      assertSpyCalls(nested.beforeEachFn, 4);
      assertSpyCalls(nested.afterEachFn, 4);
    },
  );

  await t.step("throws if called with wrong suite object", () => {
    assertThrows(
      // deno-lint-ignore no-explicit-any
      () => describe({ name: "", suite: {} as any, fn: () => {} }),
      Error,
      "suite does not represent a registered test suite",
    );
  });

  await t.step(
    "throws if nested test case is called with permission option",
    async () => {
      using test = stub(Deno, "test");
      const context = new TestContext("example");
      try {
        describe("foo", () => {
          describe("bar", { permissions: { read: true } }, () => {
            it("baz", () => {});
          });
        });
        const call = test.calls[0];
        const options = call?.args[0] as Deno.TestDefinition;
        await assertRejects(
          async () => await options.fn(context),
          Error,
          "permissions option not available for nested tests",
        );
      } finally {
        TestSuiteInternal.reset();
      }
    },
  );

  await t.step(
    "cause type error if async function is passed as describe definition",
    () => {
      try {
        // @ts-expect-error async function is not assignable to describe argument
        describe({ name: "example", fn: async () => {} });
        // @ts-expect-error async function is not assignable to describe argument
        describe("example", { fn: async () => {} });
        // @ts-expect-error async function is not assignable to describe argument
        describe("example", async () => {});
        // TODO(kt3k): This case should be type error but it's checked as
        // DescribeDefinition<T> and passes the type check
        // describe(async function example() {});
        // @ts-expect-error async function is not assignable to describe argument
        describe("example", {}, async () => {});
        // @ts-expect-error async function is not assignable to describe argument
        describe({ name: "example" }, async () => {});
        // @ts-expect-error async function is not assignable to describe argument
        describe({}, async function example() {});

        const suite = describe("example");
        // @ts-expect-error async function is not assignable to describe argument
        describe(suite, "example", { fn: async () => {} });
        // @ts-expect-error async function is not assignable to describe argument
        describe(suite, "example", async () => {});
        // @ts-expect-error async function is not assignable to describe argument
        describe(suite, async () => {});
        // @ts-expect-error async function is not assignable to describe argument
        describe(suite, "example", {}, async () => {});
        // @ts-expect-error async function is not assignable to describe argument
        describe(suite, { name: "example" }, async () => {});
        // @ts-expect-error async function is not assignable to describe argument
        describe(suite, {}, async function example() {});
      } catch {
        // Ignores runtime errors as this case is for static type checking
      }
    },
  );

  await t.step(
    "throws runtime error if async function is passed as describe fn",
    () => {
      assertThrows(
        // deno-lint-ignore no-explicit-any
        () => describe("async describe", (async () => {}) as any),
        Error,
        'Returning a Promise from "describe" is not supported: tests must be defined synchronously',
      );
    },
  );
});