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Source file src/runtime/debug/stack_test.go

Documentation: runtime/debug

  // 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++
  	}
  	n++
  	frame("src/runtime/debug/stack.go", "runtime/debug.Stack")
  	frame("src/runtime/debug/stack_test.go", "runtime/debug_test.(*T).ptrmethod")
  	frame("src/runtime/debug/stack_test.go", "runtime/debug_test.T.method")
  	frame("src/runtime/debug/stack_test.go", "runtime/debug_test.TestStack")
  	frame("src/testing/testing.go", "")
  }
  
  func check(t *testing.T, line, has string) {
  	if !strings.Contains(line, has) {
  		t.Errorf("expected %q in %q", has, line)
  	}
  }
  

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