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*: Add
testfork.RunTest to run multiple tests in one function (ping…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test") | ||
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| go_library( | ||
| name = "testfork", | ||
| srcs = ["fork.go"], | ||
| importpath = "github.com/pingcap/tidb/testkit/testfork", | ||
| visibility = ["//visibility:public"], | ||
| deps = [ | ||
| "@com_github_cockroachdb_errors//:errors", | ||
| "@com_github_stretchr_testify//require", | ||
| ], | ||
| ) | ||
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| go_test( | ||
| name = "testfork_test", | ||
| srcs = ["fork_test.go"], | ||
| embed = [":testfork"], | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| // Copyright 2022 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
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| package testfork | ||
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| import ( | ||
| "fmt" | ||
| "os" | ||
| "strings" | ||
| "testing" | ||
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| "github.com/cockroachdb/errors" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
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| type pickStack struct { | ||
| stack [][]any | ||
| pos int | ||
| valid bool | ||
| } | ||
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| func newPickStack() *pickStack { | ||
| return &pickStack{ | ||
| valid: true, | ||
| } | ||
| } | ||
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| func (s *pickStack) NextStack() { | ||
| for len(s.stack) > 0 { | ||
| lastIndex := len(s.stack) - 1 | ||
| s.stack[lastIndex] = s.stack[lastIndex][1:] | ||
| if len(s.stack[lastIndex]) > 0 { | ||
| break | ||
| } | ||
| s.stack = s.stack[:lastIndex] | ||
| } | ||
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| s.pos = 0 | ||
| s.valid = len(s.stack) > 0 | ||
| } | ||
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| func (s *pickStack) PickValue(values []any) (any, error) { | ||
| if len(values) == 0 { | ||
| return nil, errors.New("values should not be empty") | ||
| } | ||
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| stackLen := len(s.stack) | ||
| if s.pos > stackLen { | ||
| return nil, errors.Newf("illegal state %d > %d", s.pos, stackLen) | ||
| } | ||
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| defer func() { | ||
| s.pos++ | ||
| }() | ||
|
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| if s.pos == stackLen { | ||
| s.stack = append(s.stack, values) | ||
| } | ||
| return s.stack[s.pos][0], nil | ||
| } | ||
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| func (s *pickStack) Values() []any { | ||
| values := make([]any, 0) | ||
| for _, v := range s.stack { | ||
| values = append(values, v[0]) | ||
| } | ||
| return values | ||
| } | ||
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| func (s *pickStack) ValuesText() string { | ||
| values := s.Values() | ||
| strValues := make([]string, len(values)) | ||
| for i, value := range values { | ||
| switch v := value.(type) { | ||
| case string: | ||
| strValues[i] = fmt.Sprintf(`"%s"`, v) | ||
| default: | ||
| strValues[i] = fmt.Sprintf("%v", v) | ||
| } | ||
| } | ||
| return "[" + strings.Join(strValues, " ") + "]" | ||
| } | ||
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| func (s *pickStack) Valid() bool { | ||
| return s.valid | ||
| } | ||
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| // T is used by for test | ||
| type T struct { | ||
| *testing.T | ||
| stack *pickStack | ||
| } | ||
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| // RunTest runs the test function `f` multiple times util all the values in `Pick` are tested. | ||
| func RunTest(t *testing.T, f func(t *T)) { | ||
| idx := 0 | ||
| for stack := newPickStack(); stack.Valid(); stack.NextStack() { | ||
| success := t.Run("", func(t *testing.T) { | ||
| f(&T{T: t, stack: stack}) | ||
| }) | ||
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| if !success { | ||
| _, err := fmt.Fprintf(os.Stderr, "SubTest #%v failed, failed values: %s\n", idx, stack.ValuesText()) | ||
| require.NoError(t, err) | ||
| } | ||
| idx++ | ||
| } | ||
| } | ||
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| // Pick returns a value from the values list | ||
| func Pick[E any](t *T, values []E) E { | ||
| slice := make([]any, len(values)) | ||
| for i, item := range values { | ||
| slice[i] = item | ||
| } | ||
| value, err := t.stack.PickValue(slice) | ||
| require.NoError(t, err) | ||
| return value.(E) | ||
| } | ||
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| // PickEnum returns a value from the value enums | ||
| func PickEnum[E any](t *T, item E, other ...E) E { | ||
| return Pick(t, append([]E{item}, other...)) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| // Copyright 2022 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
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| package testfork | ||
|
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| import ( | ||
| "testing" | ||
|
|
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| "github.com/stretchr/testify/require" | ||
| ) | ||
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| func TestForkSubTest(t *testing.T) { | ||
| var values [][]any | ||
| RunTest(t, func(t *T) { | ||
| x := Pick(t, []int{1, 2, 3}) | ||
| y := PickEnum(t, "a", "b") | ||
| var z any | ||
| if x == 2 { | ||
| z = PickEnum(t, 10, 11) | ||
| } else { | ||
| z = Pick(t, []string{"g", "h"}) | ||
| } | ||
| values = append(values, []any{x, y, z}) | ||
| }) | ||
| require.Equal(t, [][]any{ | ||
| {1, "a", "g"}, | ||
| {1, "a", "h"}, | ||
| {1, "b", "g"}, | ||
| {1, "b", "h"}, | ||
| {2, "a", 10}, | ||
| {2, "a", 11}, | ||
| {2, "b", 10}, | ||
| {2, "b", 11}, | ||
| {3, "a", "g"}, | ||
| {3, "a", "h"}, | ||
| {3, "b", "g"}, | ||
| {3, "b", "h"}, | ||
| }, values) | ||
| } |
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