1
0
Fork 0
mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00
moby--moby/pkg/discovery/file/file_test.go

115 lines
3 KiB
Go
Raw Normal View History

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