write tests and docs for window module

Author: ShMcK

src/modules/window/Quit/index.tsx

@@ -1,9 +1,17 @@
 import {QUIT, WINDOW_TOGGLE} from './types';
 
+/**
+ * Toggle window open action
+ * @returns Action
+ */
 export function windowToggle(): Action {
   return { type: WINDOW_TOGGLE };
 }
 
+/**
+ * Toggle window closed action
+ * @returns Action
+ */
 export function quit(): Action {
   return { type: QUIT };
 }

src/modules/window/actions.ts

@@ -0,0 +1,21 @@
+import reducer from './reducer';
+
+describe('window reducer', () => {
+
+  it('should initialize false', () => {
+    const action = { type: 'null' };
+    expect(reducer(undefined, action)).toBe(false);
+  });
+
+  it('should set to false on QUIT', () => {
+    const action = { type: 'QUIT' };
+    expect(reducer(true, action)).toBe(false);
+  });
+
+  it('should toggle the WINDOW_TOGGLE', () => {
+    const action = { type: 'WINDOW_TOGGLE' };
+    expect(reducer(false, action)).toBe(true);
+    expect(reducer(true, action)).toBe(false);
+  });
+
+});

src/modules/window/reducer.test.ts

@@ -1,5 +1,11 @@
 import {QUIT, WINDOW_TOGGLE} from './types';
 
+/**
+ * Window open status reducer
+ * @param  {} open=false
+ * @param  {Action} action
+ * @returns boolean window open status
+ */
 export default function windowReducer(
   open = false, action: Action
 ): boolean {