src/testing/emulator/emulator_test.go

// Copyright 2020 The Fuchsia 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 emulator

import (
	"bufio"
	"fmt"
	"strings"
	"testing"
)

func TestCheckForLogMessage(t *testing.T) {
	logLines := []string{"Some message", "Another message", "First message we're looking for", "Another message", "Second message we're looking for"}
	testStr := strings.Join(logLines, "\n")
	// attach a newline, because the reader expects this
	testStr = fmt.Sprintf("%s\n", testStr)
	fakeReader := bufio.NewReader(strings.NewReader(testStr))
	i := Instance{}
	if i.checkForLogMessage(fakeReader, logLines[2]) != nil {
		t.Error("check for first log message failed")
	}

	fakeReader = bufio.NewReader(strings.NewReader(testStr))

	i = Instance{stdout: fakeReader}
	if i.WaitForLogMessage(logLines[2]) != nil {
		t.Error("Failed finding log line with `WaitForLogMessage`")
	}

	fakeReader = bufio.NewReader(strings.NewReader(testStr))

	i = Instance{stdout: fakeReader}
	if i.WaitForLogMessages([]string{logLines[2]}) != nil {
		t.Error("Failed finding log line with `WaitForLogMessageS`")
	}

	fakeReader = bufio.NewReader(strings.NewReader(testStr))

	i = Instance{stdout: fakeReader}
	if i.WaitForLogMessages([]string{logLines[2], logLines[4]}) != nil {
		t.Error("Failed finding IN-ORDER log lines")
	}

	fakeReader = bufio.NewReader(strings.NewReader(testStr))

	i = Instance{stdout: fakeReader}
	if i.WaitForLogMessages([]string{logLines[4], logLines[2]}) != nil {
		t.Error("Failed finding OUT-OF-ORDER log lines")
	}
}