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// Copyright 2011 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 debug_test
import (
. "runtime/debug"
"strings"
"testing"
)
type T int
func (t *T) ptrmethod() []byte {
return Stack()
}
func (t T) method() []byte {
return t.ptrmethod()
}
/*
The traceback should look something like this, modulo line numbers and hex constants.
Don't worry much about the base levels, but check the ones in our own package.
goroutine 10 [running]:
runtime/debug.Stack(0x0, 0x0, 0x0)
/Users/r/go/src/runtime/debug/stack.go:28 +0x80
runtime/debug.(*T).ptrmethod(0xc82005ee70, 0x0, 0x0, 0x0)
/Users/r/go/src/runtime/debug/stack_test.go:15 +0x29
runtime/debug.T.method(0x0, 0x0, 0x0, 0x0)
/Users/r/go/src/runtime/debug/stack_test.go:18 +0x32
runtime/debug.TestStack(0xc8201ce000)
/Users/r/go/src/runtime/debug/stack_test.go:37 +0x38
testing.tRunner(0xc8201ce000, 0x664b58)
/Users/r/go/src/testing/testing.go:456 +0x98
created by testing.RunTests
/Users/r/go/src/testing/testing.go:561 +0x86d
*/
func TestStack(t *testing.T) {
b := T(0).method()
lines := strings.Split(string(b), "\n")
if len(lines) < 6 {
t.Fatal("too few lines")
}
n := 0
frame := func(line, code string) {
check(t, lines[n], code)
n++
check(t, lines[n], line)
n++
}
frame("stack_test.go", "\tmethod.N15_runtime_debug.T: return Stack()")
frame("stack_test.go", "\tmethod.N15_runtime_debug.T: return t.ptrmethod()")
frame("stack_test.go", "\tTestStack: b := T(0).method()")
frame("testing/testing.go", "")
}
func check(t *testing.T, line, has string) {
if strings.Index(line, has) < 0 {
t.Errorf("expected %q in %q", has, line)
}
}
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