feat: add Launcher.Client (#874)

* feat: add Launcher.Client

* add Launcher.Client test

* fix CI test

lib/launcher/manager.go

@@ -67,12 +67,18 @@ func (l *Launcher) JSON() []byte {
 	return utils.MustToJSONBytes(l)
 }
 
-// MustClient for launching browser remotely via the launcher.Manager.
+// MustClient similar to Launcher.Client
 func (l *Launcher) MustClient() *cdp.Client {
 	u, h := l.ClientHeader()
 	return cdp.MustStartWithURL(l.ctx, u, h)
 }
 
+// Client for launching browser remotely via the launcher.Manager.
+func (l *Launcher) Client() (*cdp.Client, error) {
+	u, h := l.ClientHeader()
+	return cdp.StartWithURL(l.ctx, u, h)
+}
+
 // ClientHeader for launching browser remotely via the launcher.Manager.
 func (l *Launcher) ClientHeader() (string, http.Header) {
 	l.mustManaged()

lib/launcher/private_test.go

@@ -162,3 +162,20 @@ func TestTestOpen(_ *testing.T) {
 
 	Open("about:blank")
 }
+
+func TestLaunchClient(t *testing.T) {
+	g := setup(t)
+
+	ctx := g.Timeout(5 * time.Second)
+
+	s := got.New(g).Serve()
+	rl := NewManager()
+	s.Mux.Handle("/", rl)
+
+	l := MustNewManaged(s.URL()).KeepUserDataDir().Delete(flags.KeepUserDataDir)
+	c, err := l.Client()
+	if err != nil {
+		g.Err(err)
+	}
+	g.E(c.Call(ctx, "", "Browser.getVersion", nil))
+}