chore: Move factories and helpers to a better place (#4551)

* chore: Move factories and helpers to a better place

* align factory product variant

* fix factory cart

* add simple store fac

* fix tests

* fix tests

* fix

* fix cart seeder

integration-tests/environment-helpers/use-server.js

@@ -0,0 +1,41 @@
+const ServerTestUtil = {
+  server_: null,
+  app_: null,
+
+  setApp: function (app) {
+    this.app_ = app
+  },
+
+  start: async function () {
+    this.server_ = await new Promise((resolve, reject) => {
+      const s = this.app_.listen(PORT, (err) => {
+        if (err) {
+          reject(err)
+        }
+      })
+      resolve(s)
+    })
+  },
+
+  kill: function () {
+    return new Promise((resolve, _) => {
+      if (this.server_) {
+        this.server_.close(() => resolve())
+      }
+      resolve()
+    })
+  },
+}
+
+const instance = ServerTestUtil
+
+module.exports = {
+  setApp: function (app) {
+    instance.setApp(app)
+    return instance
+  },
+
+  useServer: function () {
+    return instance
+  },
+}