tests: add dns-truncate test

plugins/contrib/patches/tests/dns-truncate.test.js

@@ -0,0 +1,79 @@
+const dnsTruncate = require("../03-dns-truncate")
+
+const samples = [
+  {
+    title: "should strip invalid DNS chars",
+    options: {},
+    manifests: [
+      {
+        kind: "Ingress",
+        spec: { rules: [{ host: "some-host.something.com" }] },
+      },
+      {
+        kind: "Ingress",
+        spec: { rules: [{ host: "something-else-some-host.com" }] },
+      },
+      {
+        kind: "Ingress",
+        spec: { rules: [{ host: "something.something.some.where.fr" }] },
+      },
+    ],
+    expected: [
+      "some-host.something.com",
+      "something-else-some-host.com",
+      "something.something.some.where.fr",
+    ],
+  },
+  {
+    title: "should cut long DNS",
+    options: {},
+    manifests: [
+      {
+        kind: "Ingress",
+        spec: {
+          rules: [
+            {
+              host: "there-are-no-big-problems-there-are-just-a-lot-of-little-problems.something.somewhere.around.com",
+            },
+          ],
+        },
+      },
+      {
+        kind: "Ingress",
+        spec: {
+          rules: [
+            {
+              host: "perfection-is-achieved-not-when-there-is-nothing-more-to-add-but-when-there-is-nothing-left-to-take-away.something.somewhere.around.com",
+            },
+          ],
+        },
+      },
+    ],
+    expected: [
+      "there-are-no-big-problems-there-are-just-a-lot-of-lit-fjdkhln2.something.somewhere.around.com",
+      "perfection-is-achieved-not-when-there-is-nothing-more-p4f2qo44.something.somewhere.around.com",
+    ],
+  },
+]
+
+samples.forEach((sample) => {
+  test(`${sample.title}`, async () => {
+    const ctx = require("~common/ctx")
+    const utils = require("~common/utils")
+
+    const res = dnsTruncate(sample.manifests, sample.options, {
+      config: { environment: "dev" },
+      ctx,
+      utils,
+      logger: {
+        trace: () => {},
+      },
+    })
+
+    const hosts = res
+      .filter((k) => k.kind === "Ingress")
+      .flatMap((ing) => ing.spec.rules.map((rule) => rule.host))
+
+    expect(hosts).toEqual(sample.expected)
+  })
+})