// Copyright 2016 Google Inc. All rights reserved.
//
// 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 cache

import (
	"io/ioutil"
	"os"
	"testing"
	"time"
)

func TestGitCache(t *testing.T) {
	testRepo, err := initTest()
	if err != nil {
		t.Fatalf("init: %v", err)
	}
	defer testRepo.Cleanup()

	dir, err := ioutil.TempDir("", "")
	if err != nil {
		t.Fatalf("TempDir: %v", err)
	}
	defer os.RemoveAll(dir)

	cache, err := newGitCache(dir)
	if err != nil {
		t.Fatalf("newGitCache(%s): %v", dir, err)
	}

	url := "file://" + testRepo.dir
	if r := cache.OpenLocal(url); r != nil {
		t.Errorf("OpenLocal(%s) succeeded", url)
	}

	lazy := newLazyRepo(url, cache)
	if r := lazy.Repository(); r != nil {
		t.Errorf("got %v for lazy.Repository", r)
	}

	go lazy.Clone()
	if r := lazy.Repository(); r != nil {
		t.Errorf("got %v for lazy.Repository", r)
	}

	// The API doesn't let us synchronize on finished clone, so we
	// have no better way to test than sleep. This test may be
	// flaky on highly loaded machines.
	dt := 50 * time.Millisecond
	time.Sleep(dt)

	if repo := lazy.Repository(); repo == nil {
		t.Errorf("lazyRepo still not loaded after %s.", dt)
	}

	if r := cache.OpenLocal(url); r == nil {
		t.Errorf("OpenLocal(%s) failed", url)
	}
}