fix the test fun for pull request 873

@@ -381,18 +381,18 @@ func RenderForm(obj interface{}) template.HTML {
 // renderFormField returns a string containing HTML of a single form field.
 func renderFormField(label, name, fType string, value interface{}, id string, class string) string {
 	if id != "" {
-		id = "id=\"" + id + "\""
+		id = " id=\"" + id + "\""
 	}
 
 	if class != "" {
-		class = "class=\"" + class + "\""
+		class = " class=\"" + class + "\""
 	}
 
 	if isValidForInput(fType) {
-		return fmt.Sprintf(`%v<input %v %v name="%v" type="%v" value="%v">`, label, id, class, name, fType, value)
+		return fmt.Sprintf(`%v<input%v%v name="%v" type="%v" value="%v">`, label, id, class, name, fType, value)
 	}
 
-	return fmt.Sprintf(`%v<%v %v %v name="%v">%v</%v>`, label, fType, id, class, name, value, fType)
+	return fmt.Sprintf(`%v<%v%v%v name="%v">%v</%v>`, label, fType, id, class, name, value, fType)
 }
 
 // isValidForInput checks if fType is a valid value for the `type` property of an HTML input element.

@@ -175,12 +175,12 @@ func TestRenderForm(t *testing.T) {
 }
 
 func TestRenderFormField(t *testing.T) {
-	html := renderFormField("Label: ", "Name", "text", "Value")
+	html := renderFormField("Label: ", "Name", "text", "Value", "", "")
 	if html != `Label: <input name="Name" type="text" value="Value">` {
 		t.Errorf("Wrong html output for input[type=text]: %v ", html)
 	}
 
-	html = renderFormField("Label: ", "Name", "textarea", "Value")
+	html = renderFormField("Label: ", "Name", "textarea", "Value", "", "")
 	if html != `Label: <textarea name="Name">Value</textarea>` {
 		t.Errorf("Wrong html output for textarea: %v ", html)
 	}
@@ -192,33 +192,34 @@ func TestParseFormTag(t *testing.T) {
 		All       int `form:"name,text,年龄："`
 		NoName    int `form:",hidden,年龄："`
 		OnlyLabel int `form:",,年龄："`
-		OnlyName  int `form:"name"`
+		OnlyName  int `form:"name" id:"name" class:"form-name"`
 		Ignored   int `form:"-"`
 	}
 
 	objT := reflect.TypeOf(&user{}).Elem()
 
-	label, name, fType, ignored := parseFormTag(objT.Field(0))
+	label, name, fType, id, class, ignored := parseFormTag(objT.Field(0))
 	if !(name == "name" && label == "年龄：" && fType == "text" && ignored == false) {
 		t.Errorf("Form Tag with name, label and type was not correctly parsed.")
 	}
 
-	label, name, fType, ignored = parseFormTag(objT.Field(1))
+	label, name, fType, id, class, ignored = parseFormTag(objT.Field(1))
 	if !(name == "NoName" && label == "年龄：" && fType == "hidden" && ignored == false) {
 		t.Errorf("Form Tag with label and type but without name was not correctly parsed.")
 	}
 
-	label, name, fType, ignored = parseFormTag(objT.Field(2))
+	label, name, fType, id, class, ignored = parseFormTag(objT.Field(2))
 	if !(name == "OnlyLabel" && label == "年龄：" && fType == "text" && ignored == false) {
 		t.Errorf("Form Tag containing only label was not correctly parsed.")
 	}
 
-	label, name, fType, ignored = parseFormTag(objT.Field(3))
-	if !(name == "name" && label == "OnlyName: " && fType == "text" && ignored == false) {
+	label, name, fType, id, class, ignored = parseFormTag(objT.Field(3))
+	if !(name == "name" && label == "OnlyName: " && fType == "text" && ignored == false &&
+		id == "name" && class == "form-name") {
 		t.Errorf("Form Tag containing only name was not correctly parsed.")
 	}
 
-	label, name, fType, ignored = parseFormTag(objT.Field(4))
+	label, name, fType, id, class, ignored = parseFormTag(objT.Field(4))
 	if ignored == false {
 		t.Errorf("Form Tag that should be ignored was not correctly parsed.")
 	}