// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package testing
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import "sync"
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// The line numbering of this file is important for TestTBHelper.
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func notHelper(t *T, msg string) {
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t.Error(msg)
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}
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func helper(t *T, msg string) {
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t.Helper()
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t.Error(msg)
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}
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func notHelperCallingHelper(t *T, msg string) {
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helper(t, msg)
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}
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func helperCallingHelper(t *T, msg string) {
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t.Helper()
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helper(t, msg)
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}
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func testHelper(t *T) {
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// Check combinations of directly and indirectly
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// calling helper functions.
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notHelper(t, "0")
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helper(t, "1")
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notHelperCallingHelper(t, "2")
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helperCallingHelper(t, "3")
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// Check a function literal closing over t that uses Helper.
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fn := func(msg string) {
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t.Helper()
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t.Error(msg)
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}
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fn("4")
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t.Run("sub", func(t *T) {
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helper(t, "5")
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notHelperCallingHelper(t, "6")
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// Check that calling Helper from inside a subtest entry function
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// works as if it were in an ordinary function call.
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t.Helper()
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t.Error("7")
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})
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// Check that calling Helper from inside a top-level test function
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// has no effect.
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t.Helper()
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t.Error("8")
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}
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func parallelTestHelper(t *T) {
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var wg sync.WaitGroup
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for i := 0; i < 5; i++ {
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wg.Add(1)
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go func() {
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notHelperCallingHelper(t, "parallel")
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wg.Done()
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}()
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}
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wg.Wait()
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}
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