Added response joinURL test and updated chromedp.

client/response_test.go

@@ -0,0 +1,15 @@
+package client
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestResponse_JoinURL(t *testing.T) {
+	req, _ := NewRequest("GET", "https://localhost.com/test/a.html", nil)
+	resp := Response{
+		Response: nil,
+		Request:  req,
+	}
+	assert.Equal(t, "https://localhost.com/source", resp.JoinURL("/source"))
+}