}

const (
	defaultRegistryHost = "index.docker.io"
	defaultRegistryKey  = defaultRegistryHost + "/v1/"
)

// isDefaultRegistryMatch determines whether the given image will
// pull from the default registry (DockerHub) based on the
// characteristics of its name.
func isDefaultRegistryMatch(image string) bool {
	parts := strings.SplitN(image, "/", 2)

	if len(parts[0]) == 0 {
		return false
	}

		{false: "registry.tld/foo/bar"},
		{false: "registry:5000/foo/bar"},
		{false: "myhostdocker.io/foo/bar"},
	}
	for _, sample := range samples {
		for expected, imageName := range sample {
			if got := isDefaultRegistryMatch(imageName); got != expected {
				t.Errorf("Expected '%s' to be %t, got %t", imageName, expected, got)
			}
		}
	}
}

func TestProvidersDockerKeyring(t *testing.T) {
	provider := &testProvider{