107 lines
2.6 KiB
Go
107 lines
2.6 KiB
Go
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package file
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import (
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"io/ioutil"
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"os"
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"testing"
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"github.com/docker/docker/pkg/discovery"
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"github.com/stretchr/testify/assert"
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)
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func TestInitialize(t *testing.T) {
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d := &Discovery{}
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d.Initialize("/path/to/file", 1000, 0)
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assert.Equal(t, d.path, "/path/to/file")
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}
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func TestNew(t *testing.T) {
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d, err := discovery.New("file:///path/to/file", 0, 0)
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assert.NoError(t, err)
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assert.Equal(t, d.(*Discovery).path, "/path/to/file")
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}
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func TestContent(t *testing.T) {
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data := `
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1.1.1.[1:2]:1111
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2.2.2.[2:4]:2222
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`
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ips := parseFileContent([]byte(data))
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assert.Len(t, ips, 5)
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assert.Equal(t, ips[0], "1.1.1.1:1111")
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assert.Equal(t, ips[1], "1.1.1.2:1111")
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assert.Equal(t, ips[2], "2.2.2.2:2222")
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assert.Equal(t, ips[3], "2.2.2.3:2222")
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assert.Equal(t, ips[4], "2.2.2.4:2222")
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}
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func TestRegister(t *testing.T) {
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discovery := &Discovery{path: "/path/to/file"}
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assert.Error(t, discovery.Register("0.0.0.0"))
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}
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func TestParsingContentsWithComments(t *testing.T) {
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data := `
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### test ###
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1.1.1.1:1111 # inline comment
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# 2.2.2.2:2222
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### empty line with comment
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3.3.3.3:3333
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### test ###
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`
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ips := parseFileContent([]byte(data))
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assert.Len(t, ips, 2)
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assert.Equal(t, "1.1.1.1:1111", ips[0])
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assert.Equal(t, "3.3.3.3:3333", ips[1])
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}
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func TestWatch(t *testing.T) {
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data := `
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1.1.1.1:1111
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2.2.2.2:2222
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`
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expected := discovery.Entries{
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&discovery.Entry{Host: "1.1.1.1", Port: "1111"},
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&discovery.Entry{Host: "2.2.2.2", Port: "2222"},
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}
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// Create a temporary file and remove it.
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tmp, err := ioutil.TempFile(os.TempDir(), "discovery-file-test")
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assert.NoError(t, err)
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assert.NoError(t, tmp.Close())
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assert.NoError(t, os.Remove(tmp.Name()))
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// Set up file discovery.
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d := &Discovery{}
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d.Initialize(tmp.Name(), 1000, 0)
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stopCh := make(chan struct{})
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ch, errCh := d.Watch(stopCh)
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// Make sure it fires errors since the file doesn't exist.
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assert.Error(t, <-errCh)
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// We have to drain the error channel otherwise Watch will get stuck.
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go func() {
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for range errCh {
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}
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}()
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// Write the file and make sure we get the expected value back.
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assert.NoError(t, ioutil.WriteFile(tmp.Name(), []byte(data), 0600))
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assert.Equal(t, expected, <-ch)
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// Add a new entry and look it up.
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expected = append(expected, &discovery.Entry{Host: "3.3.3.3", Port: "3333"})
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f, err := os.OpenFile(tmp.Name(), os.O_APPEND|os.O_WRONLY, 0600)
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assert.NoError(t, err)
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assert.NotNil(t, f)
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_, err = f.WriteString("\n3.3.3.3:3333\n")
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assert.NoError(t, err)
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f.Close()
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assert.Equal(t, expected, <-ch)
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// Stop and make sure it closes all channels.
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close(stopCh)
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assert.Nil(t, <-ch)
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assert.Nil(t, <-errCh)
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}
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