Add unit test for EntityListLoader

frontend/src/metabase/lib/api.js

@@ -43,7 +43,7 @@ const DEFAULT_OPTIONS: Options = {
 export type APIMethod = (d?: Data, o?: Options) => Promise<any>;
 export type APICreator = (t: string, o?: Options | TransformFn) => APIMethod;
 
-class Api extends EventEmitter {
+export class Api extends EventEmitter {
   basename: "";
 
   GET: APICreator;

frontend/test/entities/containers/EntityListLoader.unit.spec.js

+import React from "react";
+
+import { mount } from "enzyme";
+import EntityListLoader from "metabase/entities/containers/EntityListLoader";
+import { Provider } from "react-redux";
+
+import entitiesReducer from "metabase/redux/entities";
+import { getStore } from "metabase/store";
+import { Api } from "metabase/lib/api";
+
+const MockEntityProvider = ({ children }) => (
+  <Provider store={getStore({ entities: entitiesReducer })}>
+    {children}
+  </Provider>
+);
+
+describe("EntityListLoader", () => {
+  let _makeRequest;
+  beforeEach(() => {
+    _makeRequest = Api.prototype._makeRequest;
+    Api.prototype._makeRequest = jest.fn().mockReturnValue(Promise.resolve([]));
+  });
+  afterEach(() => {
+    Api.prototype._makeRequest = _makeRequest;
+  });
+
+  describe("with entityType of search", () => {
+    it("should handle object entityQuery", async () => {
+      mount(
+        <MockEntityProvider>
+          <EntityListLoader
+            entityType="search"
+            entityQuery={{ collection: "foo" }}
+          />
+        </MockEntityProvider>,
+      );
+      expect(
+        Api.prototype._makeRequest.mock.calls.map(c => c.slice(0, 2)),
+      ).toEqual([["GET", "/api/collection/foo/items"]]);
+    });
+
+    it("should handle function entityQuery", async () => {
+      mount(
+        <MockEntityProvider>
+          <EntityListLoader
+            entityType="search"
+            entityQuery={(state, props) => ({ collection: props.collectionId })}
+            collectionId="foo"
+          />
+        </MockEntityProvider>,
+      );
+      expect(
+        Api.prototype._makeRequest.mock.calls.map(c => c.slice(0, 2)),
+      ).toEqual([["GET", "/api/collection/foo/items"]]);
+    });
+  });
+});