fix(tooltip): use defined variable (#997)

* chore: fix tooltip undefined var

* chore: fix test

* chore: typo in spec title

Author: montezume

src/components/tooltip/tooltip.js

@@ -122,7 +122,7 @@ const Tooltip = props => {
   );
 
   const childrenProps = {
-    'aria-describedby': open ? id : null,
+    'aria-describedby': tooltipIsOpen ? id : null,
     // for seo and accessibility, we add the tooltip's title
     // as a native title when the title is hidden
     title:

src/components/tooltip/tooltip.spec.js

@@ -107,6 +107,15 @@ describe('Tooltip', () => {
     ).toBeInTheDocument();
   });
 
+  it('should not set aria-describedby on button when not open', () => {
+    const { container } = render(
+      <TestComponent id="my-tooltip" isOpen={false} />
+    );
+    expect(
+      container.querySelector("[aria-describedby='my-tooltip']")
+    ).not.toBeInTheDocument();
+  });
+
   describe('interacting with mouse', () => {
     it('should show tooltip', () => {
       const onMouseOver = jest.fn();