Add basically test for 3 databases

scripts/util/mainapp.js

@@ -0,0 +1,48 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 - 2021 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+const { spawn } = require('child_process')
+
+function startMainApp(env) {
+  return new Promise((resolve, reject) => {
+    const task = spawn('npm', ['start'], {
+      stdio: ['inherit', 'pipe', 'inherit'],
+      env: { ...process.env, PORT: 0 /* random port */, ...env }
+    })
+
+    task.on('exit', () => reject(new Error('task terminated too early')))
+    task.on('error', (ex) => reject(ex))
+
+    task.stdout.on('data', (data) => {
+      if (data.toString('utf8').split('\n').indexOf('ready') !== -1) resolve(task)
+
+      process.stdout.write(data)
+    })
+
+    setTimeout(() => {
+      reject(new Error('timeout'))
+
+      task.kill('SIGINT')
+    }, 1000 * 30)
+  }).then((task) => {
+    return {
+      shutdown: () => task.kill('SIGINT')
+    }
+  })
+}
+
+module.exports = { startMainApp }