Added working tests, one of which fails because of a bug in the code that needs to be fixed

Signed-off-by: Karan Shah <karan.shah@simplybusiness.co.uk>

plugins/airbrake/src/api/ProductionApi.test.ts

@@ -20,6 +20,7 @@ import mockGroupsData from './mock/airbrakeGroupsApiMock.json';
 import { setupServer } from 'msw/node';
 import { setupRequestMockHandlers } from '@backstage/test-utils';
 import { localDiscoveryApi } from './mock';
+import { NoProjectIdError } from './AirbrakeApi';
 
 describe('The production Airbrake API', () => {
   const productionApi = new ProductionAirbrakeApi(localDiscoveryApi);
@@ -53,4 +54,10 @@ describe('The production Airbrake API', () => {
 
     await expect(productionApi.fetchGroups('123456')).rejects.toThrow();
   });
+
+  it('throws if project ID is empty', async () => {
+    await expect(productionApi.fetchGroups('')).rejects.toThrowError(
+      NoProjectIdError,
+    );
+  });
 });

plugins/airbrake/src/components/EntityAirbrakeWidget/EntityAirbrakeWidget.test.tsx

@@ -23,9 +23,9 @@ import {
   setupRequestMockHandlers,
   TestApiProvider,
 } from '@backstage/test-utils';
-import { createEntity } from '../../api';
 import {
   airbrakeApiRef,
+  createEntity,
   localDiscoveryApi,
   MockAirbrakeApi,
   ProductionAirbrakeApi,
@@ -52,15 +52,23 @@ describe('EntityAirbrakeContent', () => {
     }
   });
 
-  it('states that the annotation is missing if no project ID annotation is provided', async () => {
+  it('states that the annotation is missing if no project ID annotation is provided but does not error', async () => {
+    const mockErrorApi = new MockErrorApi({ collect: true });
+
     const widget = await renderInTestApp(
-      <TestApiProvider apis={[[airbrakeApiRef, new MockAirbrakeApi()]]}>
+      <TestApiProvider
+        apis={[
+          [airbrakeApiRef, new ProductionAirbrakeApi(localDiscoveryApi)],
+          [errorApiRef, mockErrorApi],
+        ]}
+      >
         <EntityAirbrakeWidget entity={createEntity()} />
       </TestApiProvider>,
     );
     await expect(
       widget.findByText('Missing Annotation'),
     ).resolves.toBeInTheDocument();
+    expect(mockErrorApi.getErrors().length).toBe(0);
   });
 
   it('states that an error occurred if the API call fails', async () => {