1# Test TestMain
2go test standalone_main_normal_test.go
3! stdout '^ok.*\[no tests to run\]'
4! stderr '^ok.*\[no tests to run\]'
5stdout '^ok'
6
7# Test TestMain sees testing flags
8go test standalone_testmain_flag_test.go
9stdout '^ok.*\[no tests to run\]'
10
11# Test TestMain with wrong signature (Issue #22388)
12! go test standalone_main_wrong_test.go
13stderr 'wrong signature for TestMain, must be: func TestMain\(m \*testing.M\)'
14
15# Test TestMain does not call os.Exit (Issue #34129)
16! go test standalone_testmain_not_call_os_exit_test.go
17! stdout '^ok'
18
19-- standalone_main_normal_test.go --
20// Copyright 2017 The Go Authors. All rights reserved.
21// Use of this source code is governed by a BSD-style
22// license that can be found in the LICENSE file.
23
24package standalone_main_normal_test
25
26import "testing"
27
28func TestMain(t *testing.T) {
29}
30-- standalone_main_wrong_test.go --
31// Copyright 2017 The Go Authors. All rights reserved.
32// Use of this source code is governed by a BSD-style
33// license that can be found in the LICENSE file.
34
35package standalone_main_wrong_test
36
37import "testing"
38
39func TestMain(m *testing.Main) {
40}
41-- standalone_testmain_flag_test.go --
42// Copyright 2019 The Go Authors. All rights reserved.
43// Use of this source code is governed by a BSD-style
44// license that can be found in the LICENSE file.
45
46package standalone_testmain_flag_test
47
48import (
49 "flag"
50 "fmt"
51 "os"
52 "testing"
53)
54
55func TestMain(m *testing.M) {
56 // A TestMain should be able to access testing flags if it calls
57 // flag.Parse without needing to use testing.Init.
58 flag.Parse()
59 found := false
60 flag.VisitAll(func(f *flag.Flag) {
61 if f.Name == "test.count" {
62 found = true
63 }
64 })
65 if !found {
66 fmt.Println("testing flags not registered")
67 os.Exit(1)
68 }
69 os.Exit(m.Run())
70}
71-- standalone_testmain_not_call_os_exit_test.go --
72// Copyright 2020 The Go Authors. All rights reserved.
73// Use of this source code is governed by a BSD-style
74// license that can be found in the LICENSE file.
75
76package standalone_testmain_not_call_os_exit_test
77
78import (
79 "testing"
80)
81
82func TestWillFail(t *testing.T) {
83 t.Error("this test will fail.")
84}
85
86func TestMain(m *testing.M) {
87 defer func() {
88 recover()
89 }()
90 exit := m.Run()
91 panic(exit)
92}
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