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# Test TestMain
go test standalone_main_normal_test.go
! stdout '^ok.*\[no tests to run\]'
! stderr '^ok.*\[no tests to run\]'
stdout '^ok'
# Test TestMain sees testing flags
go test standalone_testmain_flag_test.go
stdout '^ok.*\[no tests to run\]'
# Test TestMain with wrong signature (Issue #22388)
! go test standalone_main_wrong_test.go
stderr 'wrong signature for TestMain, must be: func TestMain\(m \*testing.M\)'
# Test TestMain does not call os.Exit (Issue #34129)
! go test standalone_testmain_not_call_os_exit_test.go
! stdout '^ok'
-- standalone_main_normal_test.go --
// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package standalone_main_normal_test
import "testing"
func TestMain(t *testing.T) {
}
-- standalone_main_wrong_test.go --
// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package standalone_main_wrong_test
import "testing"
func TestMain(m *testing.Main) {
}
-- standalone_testmain_flag_test.go --
// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package standalone_testmain_flag_test
import (
"flag"
"fmt"
"os"
"testing"
)
func TestMain(m *testing.M) {
// A TestMain should be able to access testing flags if it calls
// flag.Parse without needing to use testing.Init.
flag.Parse()
found := false
flag.VisitAll(func(f *flag.Flag) {
if f.Name == "test.count" {
found = true
}
})
if !found {
fmt.Println("testing flags not registered")
os.Exit(1)
}
os.Exit(m.Run())
}
-- standalone_testmain_not_call_os_exit_test.go --
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package standalone_testmain_not_call_os_exit_test
import (
"testing"
)
func TestWillFail(t *testing.T) {
t.Error("this test will fail.")
}
func TestMain(m *testing.M) {
defer func() {
recover()
}()
exit := m.Run()
panic(exit)
}
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