From 268ec332b486503a6e104657d858297a70b4f42a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Robert=20Sch=C3=A4fer?= <git@roschaefer.de>
Date: Sat, 13 Jul 2019 19:21:59 +0200
Subject: [PATCH] Add a first test with `apollo-server-testing`

---
 backend/src/server.spec.js | 43 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 backend/src/server.spec.js

diff --git a/backend/src/server.spec.js b/backend/src/server.spec.js
new file mode 100644
index 000000000..6d4ef546d
--- /dev/null
+++ b/backend/src/server.spec.js
@@ -0,0 +1,43 @@
+import { createTestClient } from 'apollo-server-testing'
+import createServer from './server'
+
+/**
+ * This file is for demonstration purposes. It does not really test the
+ * `isLoggedIn` query but demonstrates how we can use `apollo-server-testing`.
+ * All we need to do is to get an instance of `ApolloServer` and maybe we want
+ * stub out `context` as shown below.
+ *
+ */
+
+let user
+let action
+describe('isLoggedIn', () => {
+  beforeEach(() => {
+    action = async () => {
+      const { server } = createServer({
+        context: () => {
+          return {
+            user,
+          }
+        },
+      })
+      const { query } = createTestClient(server)
+
+      const isLoggedIn = `{ isLoggedIn }`
+      return query({ query: isLoggedIn })
+    }
+  })
+
+  it('returns false', async () => {
+    const expected = expect.objectContaining({ data: { isLoggedIn: false } })
+    await expect(action()).resolves.toEqual(expected)
+  })
+
+  describe('when authenticated', () => {
+    it('returns true', async () => {
+      user = { id: '123' }
+      const expected = expect.objectContaining({ data: { isLoggedIn: true } })
+      await expect(action()).resolves.toEqual(expected)
+    })
+  })
+})