github.com/GoogleContainerTools/skaffold@v1.39.18/pkg/skaffold/filemon/monitor_test.go (about)

     1  /*
     2  Copyright 2019 The Skaffold Authors
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package filemon
    18  
    19  import (
    20  	"testing"
    21  	"time"
    22  
    23  	"github.com/GoogleContainerTools/skaffold/testutil"
    24  )
    25  
    26  func TestFileMonitor(t *testing.T) {
    27  	tests := []struct {
    28  		description string
    29  		makeChanges func(folder *testutil.TempDir)
    30  	}{
    31  		{
    32  			description: "file change",
    33  			makeChanges: func(folder *testutil.TempDir) {
    34  				folder.Chtimes("file", time.Now().Add(2*time.Second))
    35  			},
    36  		},
    37  		{
    38  			description: "file delete",
    39  			makeChanges: func(folder *testutil.TempDir) {
    40  				folder.Remove("file")
    41  			},
    42  		},
    43  		{
    44  			description: "file create",
    45  			makeChanges: func(folder *testutil.TempDir) {
    46  				folder.Touch("new")
    47  			},
    48  		},
    49  	}
    50  	for _, test := range tests {
    51  		testutil.Run(t, test.description, func(t *testutil.T) {
    52  			tmpDir := t.NewTempDir().Touch("file")
    53  
    54  			monitor := NewMonitor()
    55  
    56  			// Register files
    57  			changed := callback{}
    58  			err := monitor.Register(tmpDir.List, changed.call)
    59  			t.CheckNoError(err)
    60  			t.CheckDeepEqual(0, changed.calls())
    61  
    62  			test.makeChanges(tmpDir)
    63  
    64  			// Verify the Monitor detects a change
    65  			err = monitor.Run(false)
    66  			t.CheckNoError(err)
    67  			t.CheckDeepEqual(1, changed.calls())
    68  
    69  			// Verify the Monitor doesn't detect more changes
    70  			err = monitor.Run(false)
    71  			t.CheckNoError(err)
    72  			t.CheckDeepEqual(1, changed.calls())
    73  		})
    74  	}
    75  }
    76  
    77  type callback struct {
    78  	events []Events
    79  }
    80  
    81  func (c *callback) call(e Events) {
    82  	c.events = append(c.events, e)
    83  }
    84  
    85  func (c *callback) calls() int {
    86  	return len(c.events)
    87  }