framework/log/trace_test.go

// Copyright (C) 2016 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package log_test

import (
	"bytes"
	"testing"

	"android.googlesource.com/platform/tools/gpu/framework/log"
)

const TraceExpected = `Info:Lemon
Info:L1:Bananna
Info:L1->L2:Melon
Info:L1->L2->L3:Mango
Info:R1:Apple
`

func TestTrace(t *testing.T) {
	buf := &bytes.Buffer{}
	base := log.Background().
		PreFilter(log.Limit(log.DebugLevel)).
		Filter(log.Pass).
		Handler(log.Writer(log.Normal, buf))
	l1 := base.Enter("L1")
	l2 := l1.Enter("L2")
	l3 := l2.Enter("L3")
	r1 := base.Enter("R1")

	base.Print("Lemon")
	l1.Print("Bananna")
	l2.Print("Melon")
	l3.Print("Mango")
	r1.Print("Apple")

	got := buf.String()
	if got != TraceExpected {
		t.Errorf("Got %q expected %q", got, TraceExpected)
	}
}