chore: added some simple tests

Signed-off-by: blam <ben@blam.sh>

plugins/scaffolder/src/components/fields/RepoUrlPicker/RepoUrlPickerRepoName.test.tsx

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2022 The Backstage Authors
+ *
+ * Licensed 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 { RepoUrlPickerRepoName } from './RepoUrlPickerRepoName';
+import { render, fireEvent } from '@testing-library/react';
+
+describe('RepoUrlPickerRepoName', () => {
+  it('should call onChange with the first allowed repo if there is none set already', async () => {
+    const onChange = jest.fn();
+
+    render(
+      <RepoUrlPickerRepoName
+        onChange={onChange}
+        allowedRepos={['foo', 'bar']}
+        rawErrors={[]}
+      />,
+    );
+
+    expect(onChange).toHaveBeenCalledWith('foo');
+  });
+
+  it('should render a dropdown of all the options', async () => {
+    const allowedRepos = ['foo', 'bar'];
+
+    const onChange = jest.fn();
+
+    const { getByRole } = render(
+      <RepoUrlPickerRepoName
+        onChange={onChange}
+        allowedRepos={allowedRepos}
+        rawErrors={[]}
+      />,
+    );
+
+    const select = getByRole('combobox');
+    await fireEvent.click(select);
+
+    for (const option of allowedRepos) {
+      const element = getByRole('option', { name: option });
+      expect(element).toBeVisible();
+    }
+  });
+
+  it('should render a normal text area when no options are passed', async () => {
+    const onChange = jest.fn();
+
+    const { getByRole } = render(
+      <RepoUrlPickerRepoName
+        onChange={onChange}
+        allowedRepos={[]}
+        rawErrors={[]}
+      />,
+    );
+
+    const textArea = getByRole('textbox');
+
+    expect(textArea).toBeVisible();
+
+    fireEvent.change(textArea, { target: { value: 'foo' } });
+
+    expect(onChange).toHaveBeenCalledWith('foo');
+  });
+});

plugins/scaffolder/src/components/fields/RepoUrlPicker/RepoUrlPickerRepoName.tsx

@@ -54,7 +54,7 @@ export const RepoUrlPickerRepoName = (props: {
             native
             label="Repositories Available"
             onChange={selected =>
-              onChange(String(Array.isArray(selected) ? selected[0] : selected))
+              String(Array.isArray(selected) ? selected[0] : selected)
             }
             disabled={allowedRepos.length === 1}
             selected={repoName}