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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
import (
"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.
/Users/r/go/src/runtime/debug/stack_test.go:15 (0x13878)
(*T).ptrmethod: return Stack()
/Users/r/go/src/runtime/debug/stack_test.go:18 (0x138dd)
T.method: return t.ptrmethod()
/Users/r/go/src/runtime/debug/stack_test.go:23 (0x13920)
TestStack: b := T(0).method()
/Users/r/go/src/testing/testing.go:132 (0x14a7a)
tRunner: test.F(t)
/Users/r/go/src/runtime/proc.c:145 (0xc970)
???: runtime·unlock(&runtime·sched);
*/
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], line)
n++
// The source might not be available while running the test.
if strings.HasPrefix(lines[n], "\t") {
check(t, lines[n], code)
n++
}
}
frame("src/runtime/debug/stack_test.go", "\t(*T).ptrmethod: return Stack()")
frame("src/runtime/debug/stack_test.go", "\tT.method: return t.ptrmethod()")
frame("src/runtime/debug/stack_test.go", "\tTestStack: b := T(0).method()")
frame("src/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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