Test backend with in-memory server in CI.

packages/backend/scripts/testci.js

@@ -0,0 +1,30 @@
+/*
+ * Starts an in-memory database and a server before running tests.
+ */
+
+import '../tests/env.js';
+import mongoose from 'mongoose';
+import { MongoMemoryServer } from 'mongodb-memory-server';
+import { loadSampleData, runTasks } from '../src/cli/lib';
+import { startApp } from '../src/app';
+import { spawn } from 'child_process';
+
+(async () => {
+  return MongoMemoryServer.create({ instance: { port: 27017 } });
+})()
+  .then((mongoServer) => {
+    mongoose.connect(mongoServer.getUri() + "freesewing", { useNewUrlParser: true });
+  })
+  .then(() => { runTasks({ reboot: true }) })
+  .then(loadSampleData)
+  .then(startApp)
+  .then(() => {
+    // Forward command-line args to test process.
+    const args = ['run', 'test', '--'].concat(process.argv.slice(2));
+    spawn('npm', args, { stdio: 'inherit' })
+      .on('exit', function(code) {
+        // Propagate exit code so that test failures are recognized.
+        process.exit(code);
+      });
+  });
+