1 files changed, 90 insertions, 0 deletions

diff --git a/src/features/utils/FeatureStore.test.js b/src/features/utils/FeatureStore.test.js
new file mode 100644
index 000000000..b618b0a14
--- /dev/null
+++ b/src/features/utils/FeatureStore.test.js
@@ -0,0 +1,90 @@
+import PropTypes from 'prop-types';
+import { observable } from 'mobx';
+import { FeatureStore } from './FeatureStore';
+import { createActionsFromDefinitions } from '../../actions/lib/actions';
+
+const actions = createActionsFromDefinitions({
+  countUp: {},
+}, PropTypes.checkPropTypes);
+
+class TestFeatureStore extends FeatureStore {
+  @observable count = 0;
+
+  reactionInvokedCount = 0;
+
+  start() {
+    this._registerActions([
+      [actions.countUp, this._countUp],
+    ]);
+    this._registerReactions([
+      this._countReaction,
+    ]);
+  }
+
+  _countUp = () => {
+    this.count += 1;
+  };
+
+  _countReaction = () => {
+    this.reactionInvokedCount += 1;
+  }
+}
+
+describe('FeatureStore', () => {
+  let store = null;
+
+  beforeEach(() => {
+    store = new TestFeatureStore();
+  });
+
+  describe('registering actions', () => {
+    it('starts the actions', () => {
+      store.start();
+      actions.countUp();
+      expect(store.count).toBe(1);
+    });
+    it('starts the reactions', () => {
+      store.start();
+      actions.countUp();
+      expect(store.reactionInvokedCount).toBe(1);
+    });
+  });
+
+  describe('stopping the store', () => {
+    it('stops the actions', () => {
+      store.start();
+      actions.countUp();
+      store.stop();
+      actions.countUp();
+      expect(store.count).toBe(1);
+    });
+    it('stops the reactions', () => {
+      store.start();
+      actions.countUp();
+      store.stop();
+      store.count += 1;
+      expect(store.reactionInvokedCount).toBe(1);
+    });
+  });
+
+  describe('toggling the store', () => {
+    it('restarts the actions correctly', () => {
+      store.start();
+      actions.countUp();
+      store.stop();
+      actions.countUp();
+      store.start();
+      actions.countUp();
+      expect(store.count).toBe(2);
+    });
+    it('restarts the reactions correctly', () => {
+      store.start();
+      actions.countUp();
+      store.stop();
+      actions.countUp();
+      store.start();
+      actions.countUp();
+      expect(store.count).toBe(2);
+    });
+  });
+});