| /* |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You 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 sync |
| |
| import ( |
| "context" |
| "io/ioutil" |
| "math/rand" |
| "os" |
| "path" |
| "strconv" |
| "testing" |
| "time" |
| |
| "github.com/stretchr/testify/assert" |
| ) |
| |
| func TestFile(t *testing.T) { |
| tempdir := os.TempDir() |
| fileName := path.Join(tempdir, "camel-k-test-"+strconv.FormatUint(rand.Uint64(), 10)) |
| _, err := os.Create(fileName) |
| assert.Nil(t, err) |
| defer os.Remove(fileName) |
| |
| ctx, cancel := context.WithDeadline(context.Background(), time.Now().Add(100*time.Second)) |
| defer cancel() |
| changes, err := File(ctx, fileName) |
| assert.Nil(t, err) |
| |
| time.Sleep(100 * time.Millisecond) |
| expectedNumChanges := 3 |
| for i := 0; i < expectedNumChanges; i++ { |
| if err := ioutil.WriteFile(fileName, []byte("data-"+strconv.Itoa(i)), 0777); err != nil { |
| t.Error(err) |
| } |
| time.Sleep(350 * time.Millisecond) |
| } |
| |
| numChanges := 0 |
| watch: |
| for { |
| select { |
| case <-ctx.Done(): |
| return |
| case <-changes: |
| numChanges++ |
| if numChanges == expectedNumChanges { |
| break watch |
| } |
| } |
| } |
| |
| assert.Equal(t, expectedNumChanges, numChanges) |
| } |