moby--moby/pkg/discovery/memory/memory_test.go

package memory // import "github.com/docker/docker/pkg/discovery/memory"

import (
	"testing"

	"github.com/docker/docker/internal/test/suite"
	"github.com/docker/docker/pkg/discovery"
	"gotest.tools/v3/assert"
)

// Hook up gocheck into the "go test" runner.
func Test(t *testing.T) {
	suite.Run(t, &discoverySuite{})
}

type discoverySuite struct{}

func (s *discoverySuite) TestWatch(c *testing.T) {
	d := &Discovery{}
	d.Initialize("foo", 1000, 0, nil)
	stopCh := make(chan struct{})
	ch, errCh := d.Watch(stopCh)

	// We have to drain the error channel otherwise Watch will get stuck.
	go func() {
		for range errCh {
		}
	}()

	expected := discovery.Entries{
		&discovery.Entry{Host: "1.1.1.1", Port: "1111"},
	}

	assert.Assert(c, d.Register("1.1.1.1:1111") == nil)
	assert.DeepEqual(c, <-ch, expected)

	expected = discovery.Entries{
		&discovery.Entry{Host: "1.1.1.1", Port: "1111"},
		&discovery.Entry{Host: "2.2.2.2", Port: "2222"},
	}

	assert.Assert(c, d.Register("2.2.2.2:2222") == nil)
	assert.DeepEqual(c, <-ch, expected)

	// Stop and make sure it closes all channels.
	close(stopCh)
	assert.Assert(c, <-ch == nil)
	assert.Assert(c, <-errCh == nil)
}