test: Adds tests to dnd controls (#13650)

superset-frontend/src/explore/components/controls/DndColumnSelectControl/DndSelectLabel.test.tsx

@@ -0,0 +1,55 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF 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 { render, screen } from 'spec/helpers/testing-library';
+import { DndItemType } from 'src/explore/components/DndItemType';
+import DndSelectLabel from 'src/explore/components/controls/DndColumnSelectControl/DndSelectLabel';
+
+const defaultProps = {
+  name: 'Column',
+  accept: 'Column' as DndItemType,
+  onDrop: jest.fn(),
+  canDrop: () => false,
+  valuesRenderer: () => <span />,
+  onChange: jest.fn(),
+  options: { string: { column_name: 'Column' } },
+};
+
+test('renders with default props', () => {
+  render(<DndSelectLabel {...defaultProps} />, { useDnd: true });
+  expect(screen.getByText('Drop columns')).toBeInTheDocument();
+});
+
+test('renders ghost button when empty', () => {
+  const ghostButtonText = 'Ghost button text';
+  render(
+    <DndSelectLabel {...defaultProps} ghostButtonText={ghostButtonText} />,
+    { useDnd: true },
+  );
+  expect(screen.getByText(ghostButtonText)).toBeInTheDocument();
+});
+
+test('renders values', () => {
+  const values = 'Values';
+  const valuesRenderer = () => <span>{values}</span>;
+  render(<DndSelectLabel {...defaultProps} valuesRenderer={valuesRenderer} />, {
+    useDnd: true,
+  });
+  expect(screen.getByText(values)).toBeInTheDocument();
+});