part 17

Author: rwieruch

package-lock.json

@@ -16,5 +16,8 @@
     "build": "react-scripts build",
     "test": "react-scripts test --env=jsdom",
     "eject": "react-scripts eject"
+  },
+  "devDependencies": {
+    "deep-freeze": "0.0.1"
   }
 }

package.json

@@ -0,0 +1,15 @@
+import { doAddStories } from './story';
+
+describe('story action', () => {
+  it('adds stories', () => {
+    const stories = ['a', 'b'];
+
+    const expectedAction = {
+      type: 'STORIES_ADD',
+      stories,
+    };
+    const action = doAddStories(stories);
+
+    expect(action).toEqual(expectedAction);;
+  });
+});

src/actions/story.test.js

@@ -0,0 +1,21 @@
+import storyReducer from './story';
+import deepFreeze from 'deep-freeze';
+
+describe('story reducer', () => {
+  it('adds stories to the story state', () => {
+    const stories = ['a', 'b', 'c'];
+
+    const action = {
+      type: 'STORIES_ADD',
+      stories,
+    };
+
+    const previousState = { stories: [], error: null };
+    const expectedNewState = { stories, error: null };
+
+    deepFreeze(previousState);
+    const newState = storyReducer(previousState, action);
+
+    expect(newState).toEqual(expectedNewState);;
+  });
+});

src/reducers/story.test.js

@@ -0,0 +1,20 @@
+import { getReadableStories } from './story';
+
+describe('story selector', () => {
+  it('retrieves readable stories', () => {
+    const storyState = {
+      error: null,
+      stories: [
+        { objectID: '1', title: 'foo' },
+        { objectID: '2', title: 'bar' },
+      ],
+    };
+    const archiveState = ['1'];
+    const state = { storyState, archiveState }
+
+    const expectedReadableStories = [{ objectID: '2', title: 'bar' }];
+    const readableStories = getReadableStories(state);
+
+    expect(readableStories).toEqual(expectedReadableStories);;
+  });
+});