[Discover] Add sidebar jest test (#76286)

* Add Jest test removed in #73226

Author: kertal

src/plugins/discover/public/application/components/sidebar/discover_field.test.tsx

@@ -80,11 +80,10 @@ function getComponent(selected = false, showDetails = false, useShortDots = fals
   const props = {
     indexPattern,
     field,
-    getDetails: jest.fn(),
+    getDetails: jest.fn(() => ({ buckets: [], error: '', exists: 1, total: true, columns: [] })),
     onAddFilter: jest.fn(),
     onAddField: jest.fn(),
     onRemoveField: jest.fn(),
-    onShowDetails: jest.fn(),
     showDetails,
     selected,
     useShortDots,
@@ -104,4 +103,9 @@ describe('discover sidebar field', function () {
     findTestSubject(comp, 'fieldToggle-bytes').simulate('click');
     expect(props.onRemoveField).toHaveBeenCalledWith('bytes');
   });
+  it('should trigger getDetails', function () {
+    const { comp, props } = getComponent(true);
+    findTestSubject(comp, 'field-bytes-showDetails').simulate('click');
+    expect(props.getDetails).toHaveBeenCalledWith(props.field);
+  });
 });