Remove deprecated `isEmpty` call

`@vue/test-utils` 1.x deprecated isEmpty call

spec/frontend/jobs/components/job_sidebar_details_container_spec.js

@@ -37,7 +37,7 @@ describe('Job Sidebar Details Container', () => {
     it('should render an empty container', () => {
       createWrapper();
 
-      expect(wrapper.isEmpty()).toBe(true);
+      expect(wrapper.html()).toBe('');
     });
   });
 
@@ -55,7 +55,6 @@ describe('Job Sidebar Details Container', () => {
       await store.dispatch('receiveJobSuccess', { [detail]: job[detail] });
       const detailsRow = findAllDetailsRow();
 
-      expect(wrapper.isEmpty()).toBe(false);
       expect(detailsRow).toHaveLength(1);
       expect(detailsRow.at(0).text()).toBe(value);
     });
@@ -65,7 +64,6 @@ describe('Job Sidebar Details Container', () => {
       await store.dispatch('receiveJobSuccess', { tags });
       const tagsComponent = findJobTags();
 
-      expect(wrapper.isEmpty()).toBe(false);
       expect(tagsComponent.text()).toBe('Tags: tag');
     });
   });
@@ -91,7 +89,7 @@ describe('Job Sidebar Details Container', () => {
       await store.dispatch('receiveJobSuccess', { metadata });
       const detailsRow = findAllDetailsRow();
 
-      expect(wrapper.isEmpty()).toBe(true);
+      expect(wrapper.html()).toBe('');
       expect(detailsRow.exists()).toBe(false);
     });
 
@@ -100,7 +98,6 @@ describe('Job Sidebar Details Container', () => {
       await store.dispatch('receiveJobSuccess', { metadata });
       const detailsRow = findAllDetailsRow();
 
-      expect(wrapper.isEmpty()).toBe(false);
       expect(detailsRow).toHaveLength(1);
       expect(detailsRow.at(0).text()).toBe('Timeout: 1m 40s');
     });

spec/frontend/releases/components/releases_pagination_graphql_spec.js

@@ -72,7 +72,7 @@ describe('~/releases/components/releases_pagination_graphql.vue', () => {
     });
 
     it('does not render anything', () => {
-      expect(wrapper.isEmpty()).toBe(true);
+      expect(wrapper.html()).toBe('');
     });
   });
 

spec/frontend/vue_shared/security_reports/security_reports_app_spec.js

@@ -371,7 +371,7 @@ describe('Security reports app', () => {
       // TODO: Remove this assertion as part of
       // https://gitlab.com/gitlab-org/gitlab/-/issues/273431
       it('initially renders nothing', () => {
-        expect(wrapper.isEmpty()).toBe(true);
+        expect(wrapper.html()).toBe('');
       });
     });
 
@@ -415,7 +415,7 @@ describe('Security reports app', () => {
       // TODO: Remove this assertion as part of
       // https://gitlab.com/gitlab-org/gitlab/-/issues/273431
       it('renders nothing', () => {
-        expect(wrapper.isEmpty()).toBe(true);
+        expect(wrapper.html()).toBe('');
       });
     });
   });