test: refactor serializer tests to improve coverage (#408)

* test: refactor serializer tests to improve coverage

* fix: move timeout in serializer tests

* test: cover missed lines in serializer tests

* fix: use namespaced checks in serializer tests

* fix: get serializer tests passing on postgres

decl/faker.js

@@ -0,0 +1,31 @@
+// @flow
+declare module 'faker' {
+  declare interface name {
+    static firstName(): string;
+    static lastName(): string;
+  }
+
+  declare interface image {
+    static imageUrl(): string;
+  }
+
+  declare interface lorem {
+    static word(): string;
+    static sentence(): string;
+    static paragraph(): string;
+    static paragraphs(): string;
+  }
+
+  declare interface random {
+    static boolean(): boolean;
+  }
+
+  declare interface helpers {
+    static randomize<T>(options: Array<T>): T;
+  }
+
+  declare interface internet {
+    static email(): string;
+    static password(length?: number): string;
+  }
+}

package.json

@@ -60,6 +60,7 @@
     "codecov": "1.0.1",
     "documentation": "4.0.0-beta9",
     "eslint-plugin-flowtype": "2.19.0",
+    "faker": "3.1.0",
     "flow-bin": "0.32.0",
     "mocha": "3.0.2",
     "node-fetch": "1.6.1",