test: ErrorBoundary dedicated directory and tests (apache#13276)

* Add tests for ErrorBoundary

* Remove original ErrorBoundary file

* Prefer absolute path

superset-frontend/src/components/ErrorBoundary/ErrorBoundary.test.tsx

@@ -0,0 +1,62 @@
+/**
+ * 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 ErrorBoundary from '.';
+
+const mockedProps = {
+  children: <span>Error children</span>,
+  onError: () => null,
+  showMessage: false,
+};
+
+const Child = () => {
+  throw new Error('Thrown error');
+};
+
+test('should render', () => {
+  const { container } = render(
+    <ErrorBoundary {...mockedProps}>
+      <Child />
+    </ErrorBoundary>,
+  );
+  expect(container).toBeInTheDocument();
+});
+
+test('should not render an error message', () => {
+  render(
+    <ErrorBoundary {...mockedProps}>
+      <Child />
+    </ErrorBoundary>,
+  );
+  expect(screen.queryByText('Unexpected error')).not.toBeInTheDocument();
+});
+
+test('should render an error message', () => {
+  const messageProps = {
+    ...mockedProps,
+    showMessage: true,
+  };
+  render(
+    <ErrorBoundary {...messageProps}>
+      <Child />
+    </ErrorBoundary>,
+  );
+  expect(screen.getByText('Unexpected error')).toBeInTheDocument();
+});

superset-frontend/src/components/ErrorBoundary.jsx → superset-frontend/src/components/ErrorBoundary/index.jsx

@@ -19,7 +19,7 @@
 import React from 'react';
 import PropTypes from 'prop-types';
 import { t } from '@superset-ui/core';
-import ErrorMessageWithStackTrace from './ErrorMessage/ErrorMessageWithStackTrace';
+import ErrorMessageWithStackTrace from 'src/components/ErrorMessage/ErrorMessageWithStackTrace';
 
 const propTypes = {
   children: PropTypes.node.isRequired,