React UI: Make test spy attachment more jest-y
@@ -177,8 +177,7 @@ describe('ExpressionInput', () => {
it('should blur input on escape', () => {
const downshift = expressionInput.find(Downshift);
const instance: any = expressionInput.instance();
- const spyBlur = jest.fn();
- instance.exprInputRef.current.blur = spyBlur;
+ const spyBlur = jest.spyOn(instance.exprInputRef.current, 'blur');
const input = downshift.find(Input);
downshift.setState({ isOpen: false });
const event = getKeyEvent('Escape');
