Fix UI glitch on SOM delete confirmation modal (elastic#87623)

* extract delete confirm modal

* extract the export modal

* add data-test-subj to confirm modal

* add comment on why we can't use EuiConfirmModal

src/plugins/saved_objects_management/public/management_section/objects_table/components/delete_confirm_modal.test.tsx

@@ -0,0 +1,97 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import React from 'react';
+import { mountWithIntl } from '@kbn/test/jest';
+import { SavedObjectWithMetadata } from '../../../../common';
+import { DeleteConfirmModal } from './delete_confirm_modal';
+
+const createObject = (): SavedObjectWithMetadata => ({
+  id: 'foo',
+  type: 'bar',
+  attributes: {},
+  references: [],
+  meta: {},
+});
+
+describe('DeleteConfirmModal', () => {
+  let onConfirm: jest.Mock;
+  let onCancel: jest.Mock;
+
+  beforeEach(() => {
+    onConfirm = jest.fn();
+    onCancel = jest.fn();
+  });
+
+  it('displays a loader if `isDeleting` is true', () => {
+    const wrapper = mountWithIntl(
+      <DeleteConfirmModal
+        isDeleting={true}
+        onConfirm={onConfirm}
+        onCancel={onCancel}
+        selectedObjects={[]}
+      />
+    );
+    expect(wrapper.find('EuiLoadingElastic')).toHaveLength(1);
+    expect(wrapper.find('EuiModal')).toHaveLength(0);
+  });
+
+  it('lists the objects to delete', () => {
+    const objs = [createObject(), createObject(), createObject()];
+    const wrapper = mountWithIntl(
+      <DeleteConfirmModal
+        isDeleting={false}
+        onConfirm={onConfirm}
+        onCancel={onCancel}
+        selectedObjects={objs}
+      />
+    );
+    expect(wrapper.find('.euiTableRow')).toHaveLength(3);
+  });
+
+  it('calls `onCancel` when clicking on the cancel button', () => {
+    const wrapper = mountWithIntl(
+      <DeleteConfirmModal
+        isDeleting={false}
+        onConfirm={onConfirm}
+        onCancel={onCancel}
+        selectedObjects={[]}
+      />
+    );
+    wrapper.find('EuiButtonEmpty').simulate('click');
+
+    expect(onCancel).toHaveBeenCalledTimes(1);
+    expect(onConfirm).not.toHaveBeenCalled();
+  });
+
+  it('calls `onDelete` when clicking on the delete button', () => {
+    const wrapper = mountWithIntl(
+      <DeleteConfirmModal
+        isDeleting={false}
+        onConfirm={onConfirm}
+        onCancel={onCancel}
+        selectedObjects={[]}
+      />
+    );
+    wrapper.find('EuiButton').simulate('click');
+
+    expect(onConfirm).toHaveBeenCalledTimes(1);
+    expect(onCancel).not.toHaveBeenCalled();
+  });
+});