Plugins: add a bundle plugins folder (#20850)

public/app/features/plugins/built_in_plugins.ts

@@ -27,8 +27,6 @@ const mssqlPlugin = async () =>
   await import(/* webpackChunkName: "mssqlPlugin" */ 'app/plugins/datasource/mssql/module');
 const testDataDSPlugin = async () =>
   await import(/* webpackChunkName: "testDataDSPlugin" */ 'app/plugins/datasource/testdata/module');
-const inputDatasourcePlugin = async () =>
-  await import(/* webpackChunkName: "inputDatasourcePlugin" */ 'app/plugins/datasource/input/module');
 const stackdriverPlugin = async () =>
   await import(/* webpackChunkName: "stackdriverPlugin" */ 'app/plugins/datasource/stackdriver/module');
 const azureMonitorPlugin = async () =>
@@ -73,7 +71,6 @@ const builtInPlugins: any = {
   'app/plugins/datasource/mssql/module': mssqlPlugin,
   'app/plugins/datasource/prometheus/module': prometheusPlugin,
   'app/plugins/datasource/testdata/module': testDataDSPlugin,
-  'app/plugins/datasource/input/module': inputDatasourcePlugin,
   'app/plugins/datasource/stackdriver/module': stackdriverPlugin,
   'app/plugins/datasource/grafana-azure-monitor-datasource/module': azureMonitorPlugin,
 

public/app/features/plugins/plugin_loader.test.ts

@@ -0,0 +1,68 @@
+// Use the real plugin_loader (stubbed by default)
+jest.unmock('app/features/plugins/plugin_loader');
+
+(global as any).ace = {
+  define: jest.fn(),
+};
+
+jest.mock('app/core/core', () => {
+  return {
+    coreModule: {
+      directive: jest.fn(),
+    },
+  };
+});
+
+import { SystemJS } from '@grafana/runtime';
+import { AppPluginMeta, PluginMetaInfo, PluginType, AppPlugin } from '@grafana/data';
+
+// Loaded after the `unmock` abve
+import { importAppPlugin } from './plugin_loader';
+
+class MyCustomApp extends AppPlugin {
+  initWasCalled = false;
+  calledTwice = false;
+
+  init(meta: AppPluginMeta) {
+    this.initWasCalled = true;
+    this.calledTwice = this.meta === meta;
+  }
+}
+
+describe('Load App', () => {
+  const app = new MyCustomApp();
+  const modulePath = 'my/custom/plugin/module';
+
+  beforeAll(() => {
+    SystemJS.set(modulePath, SystemJS.newModule({ plugin: app }));
+  });
+
+  afterAll(() => {
+    SystemJS.delete(modulePath);
+  });
+
+  it('should call init and set meta', async () => {
+    const meta: AppPluginMeta = {
+      id: 'test-app',
+      module: modulePath,
+      baseUrl: 'xxx',
+      info: {} as PluginMetaInfo,
+      type: PluginType.app,
+      name: 'test',
+    };
+
+    // Check that we mocked the import OK
+    const m = await SystemJS.import(modulePath);
+    expect(m.plugin).toBe(app);
+
+    const loaded = await importAppPlugin(meta);
+    expect(loaded).toBe(app);
+    expect(app.meta).toBe(meta);
+    expect(app.initWasCalled).toBeTruthy();
+    expect(app.calledTwice).toBeFalsy();
+
+    const again = await importAppPlugin(meta);
+    expect(again).toBe(app);
+    expect(app.calledTwice).toBeTruthy();
+  });
+});