add test case

mui · Jan 20, 2020 · 952087a · 952087a
1 parent 18c785f
commit 952087a
Showing 1 changed file with 19 additions and 1 deletion.
diff --git a/packages/material-ui/src/Tooltip/Tooltip.test.js b/packages/material-ui/src/Tooltip/Tooltip.test.js
@@ -220,10 +220,10 @@ describe('<Tooltip />', () => {
     it('should use hysteresis with the enterDelay', () => {
       const { container } = render(
         <Tooltip
+          {...defaultProps}
           enterDelay={111}
           leaveDelay={5}
           TransitionProps={{ timeout: 6 }}
-          {...defaultProps}
         />,
       );
       const children = container.querySelector('#testChild');
@@ -466,4 +466,22 @@ describe('<Tooltip />', () => {
       );
     });
   });
+
+  it('should use the same popper.js instance between two renders', () => {
+    const popperRef = React.createRef();
+    const { setProps } = render(
+      <Tooltip
+        {...defaultProps}
+        open={false}
+        PopperProps={{
+          popperRef,
+        }}
+      />,
+    );
+    setProps({ open: true });
+    const render1 = popperRef.current;
+    setProps({ open: true });
+    const render2 = popperRef.current;
+    expect(render1).to.equa(render2);
+  });
 });