first commit

spec/routes/getItems.spec.js

@@ -0,0 +1,19 @@
+const db = require('../../src/persistence');
+const getItems = require('../../src/routes/getItems');
+const ITEMS = [{ id: 12345 }];
+
+jest.mock('../../src/persistence', () => ({
+    getItems: jest.fn(),
+}));
+
+test('it gets items correctly', async () => {
+    const req = {};
+    const res = { send: jest.fn() };
+    db.getItems.mockReturnValue(Promise.resolve(ITEMS));
+
+    await getItems(req, res);
+
+    expect(db.getItems.mock.calls.length).toBe(1);
+    expect(res.send.mock.calls[0].length).toBe(1);
+    expect(res.send.mock.calls[0][0]).toEqual(ITEMS);
+});