add follow action and reducers test

test/actions/follow.test.js

@@ -0,0 +1,35 @@
+import { expect } from "chai";
+import actions from '../../src/actions';
+import * as followActions from '../../src/actions/follow';
+
+describe('follow actions', () => {
+  describe('enable', () => {
+    it('creates FOLLOW_ENABLE action', () => {
+      let action = followActions.enable(true);
+      expect(action.type).to.equal(actions.FOLLOW_ENABLE);
+      expect(action.newTab).to.equal(true);
+    });
+  });
+
+  describe('disable', () => {
+    it('creates FOLLOW_DISABLE action', () => {
+      let action = followActions.disable(true);
+      expect(action.type).to.equal(actions.FOLLOW_DISABLE);
+    });
+  });
+
+  describe('keyPress', () => {
+    it('creates FOLLOW_KEY_PRESS action', () => {
+      let action = followActions.keyPress(100);
+      expect(action.type).to.equal(actions.FOLLOW_KEY_PRESS);
+      expect(action.key).to.equal(100);
+    });
+  });
+
+  describe('backspace', () => {
+    it('creates FOLLOW_BACKSPACE action', () => {
+      let action = followActions.backspace(100);
+      expect(action.type).to.equal(actions.FOLLOW_BACKSPACE);
+    });
+  });
+});

test/reducers/follow.test.js

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+import { expect } from "chai";
+import actions from '../../src/actions';
+import followReducer from '../../src/reducers/follow';
+
+describe('follow reducer', () => {
+  it ('returns the initial state', () => {
+    let state = followReducer(undefined, {});
+    expect(state).to.have.property('enabled', false);
+    expect(state).to.have.property('newTab');
+    expect(state).to.have.deep.property('keys', []);
+  });
+
+  it ('returns next state for FOLLOW_ENABLE', () => {
+    let action = { type: actions.FOLLOW_ENABLE, newTab: true };
+    let state = followReducer({ enabled: false, newTab: false }, action);
+    expect(state).to.have.property('enabled', true);
+    expect(state).to.have.property('newTab', true);
+  });
+
+  it ('returns next state for FOLLOW_DISABLE', () => {
+    let action = { type: actions.FOLLOW_DISABLE };
+    let state = followReducer({ enabled: true }, action);
+    expect(state).to.have.property('enabled', false);
+  });
+
+  it ('returns next state for FOLLOW_KEY_PRESS', () => {
+    let action = { type: actions.FOLLOW_KEY_PRESS, key: 100};
+    let state = followReducer({ keys: [] }, action);
+    expect(state).to.have.deep.property('keys', [100]);
+
+    action = { type: actions.FOLLOW_KEY_PRESS, key: 200};
+    state = followReducer(state, action);
+    expect(state).to.have.deep.property('keys', [100, 200]);
+  });
+
+  it ('returns next state for FOLLOW_BACKSPACE', () => {
+    let action = { type: actions.FOLLOW_BACKSPACE };
+    let state = followReducer({ keys: [100, 200] }, action);
+    expect(state).to.have.deep.property('keys', [100]);
+
+    state = followReducer(state, action);
+    expect(state).to.have.deep.property('keys', []);
+
+    state = followReducer(state, action);
+    expect(state).to.have.deep.property('keys', []);
+  });
+});