add tests for pagePosition

ShMcK · ShMcK · commit 5d34a949aba4 · 2016-09-11T10:13:01.000-07:00
diff --git a/src/modules/page/page-position/reducer.test.ts b/src/modules/page/page-position/reducer.test.ts
@@ -0,0 +1,27 @@
+/// <reference path="../../../typings/globals/jest/index.d.ts" />
+
+import reducer from './index';
+import { PAGE_SET } from '../types';
+
+describe('page position reducer', () => {
+
+  it('does nothing if no known action', () => {
+    const action = { type: 'unknown' };
+    expect(reducer(undefined, action)).toBe(0);
+  });
+
+  it('handles PAGE_SET', () => {
+    const pagePosition = 2;
+    const action = { type: PAGE_SET, payload: { pagePosition } };
+    expect(reducer(0, action)).toBe(pagePosition);
+  });
+
+  it('handles PROGRESS_PAGE_POSITION', () => {
+    const progress = {
+      pages: [true, true, true, false, false]
+    };
+    const action = { type: 'PROGRESS_PAGE_POSITION', payload: { progress } };
+    expect(reducer(0, action)).toBe(3);
+  });
+
+});
