fix: TimePicker should not show header (#739)

* fix: timePicker should not have header

* test: add test case

Author: zombieJ

src/PickerInput/Popup/PopupPanel.tsx

@@ -61,6 +61,8 @@ export default function PopupPanel<DateType extends object = any>(
     },
   };
 
+  const hideHeader = picker === 'time';
+
   // ====================== Limitation ======================
   const needLimit = React.useCallback(
     (currentPickerValue: DateType) => {
@@ -96,6 +98,7 @@ export default function PopupPanel<DateType extends object = any>(
     ...props,
     hoverValue: null,
     hoverRangeValue: null,
+    hideHeader,
   };
 
   if (range) {

src/PickerPanel/context.ts

@@ -104,3 +104,7 @@ export interface PickerHackContextProps {
  * Internal usage for RangePicker to not to show the operation arrow
  */
 export const PickerHackContext = React.createContext<PickerHackContextProps>({});
+
+if (process.env.NODE_ENV !== 'production') {
+  PickerHackContext.displayName = 'PickerHackContext';
+}

tests/picker.spec.tsx

@@ -605,7 +605,10 @@ describe('Picker.Basic', () => {
     it('time should display now', () => {
       const onCalendarChange = jest.fn();
       const { container } = render(<DayPicker onCalendarChange={onCalendarChange} picker="time" />);
+      
       openPicker(container);
+      expect(document.querySelector('.rc-picker-header')).toBeFalsy();
+
       fireEvent.click(document.querySelector('.rc-picker-now > a'));
 
       expect(