diff --git a/src/components/drawer/FilterGroup.vue b/src/components/drawer/FilterGroup.vue
index 3c8096c..1083880 100644
--- a/src/components/drawer/FilterGroup.vue
+++ b/src/components/drawer/FilterGroup.vue
@@ -44,21 +44,7 @@
 <script lang="ts">
 import Vue, { PropType } from 'vue';
 import { mapState, mapMutations } from 'vuex';
-
-export interface Group {
-  title: string;
-  icon: string;
-  children: Child[];
-  model: boolean;
-  select: string;
-}
-
-export interface Child {
-  title: string;
-  key: string | null;
-  icon: string;
-  append: string | null;
-}
+import { FilterGroup as types } from '../types';
 
 interface Data {
   model: boolean;
@@ -67,7 +53,7 @@ interface Data {
 
 export default Vue.extend({
   props: {
-    group: Object as PropType<Group>,
+    group: Object as PropType<types.Group>,
   },
   data(): Data {
     return {
diff --git a/src/components/types.ts b/src/components/types.ts
new file mode 100644
index 0000000..4f0835e
--- /dev/null
+++ b/src/components/types.ts
@@ -0,0 +1,16 @@
+export declare module FilterGroup {
+  export interface Group {
+    title: string;
+    icon: string;
+    children: Child[];
+    model: boolean;
+    select: string;
+  }
+
+  export interface Child {
+    title: string;
+    key: string | null;
+    icon: string;
+    append: string | null;
+  }
+}
diff --git a/src/store/config.ts b/src/store/config.ts
index 4148bf7..8c00870 100644
--- a/src/store/config.ts
+++ b/src/store/config.ts
@@ -1,7 +1,7 @@
 import _ from 'lodash';
 import Vue from 'vue';
 import { Module } from 'vuex';
-import { RootState, ConfigState } from './types';
+import { ConfigState } from './types';
 
 const configKey = 'qb-config';
 
@@ -18,11 +18,11 @@ const defaultConfig = {
 };
 
 function saveConfig(obj: any) {
-  localStorage[configKey] = JSON.stringify(obj);
+  localStorage.setItem(configKey, JSON.stringify(obj));
 }
 
 function loadConfig() {
-  const tmp = localStorage[configKey];
+  const tmp = localStorage.getItem(configKey);
   if (!tmp) {
     return {};
   }
@@ -30,15 +30,21 @@ function loadConfig() {
   return JSON.parse(tmp);
 }
 
-export const configStore : Module<ConfigState, RootState> = {
-  state: {
-    userConfig: loadConfig(),
+export const configStore : Module<ConfigState, any> = {
+  state() {
+    return {
+      userConfig: loadConfig(),
+    };
   },
   mutations: {
     updateConfig(state, payload) {
       const { key, value } = payload;
-      const tmp = _.merge({}, state.userConfig[key], value);
-      Vue.set(state.userConfig, key, tmp);
+      if (_.isPlainObject(value)) {
+        const tmp = _.merge({}, state.userConfig, value);
+        Vue.set(state.userConfig, key, tmp);
+      } else {
+        Vue.set(state.userConfig, key, value);
+      }
 
       saveConfig(state.userConfig);
     },
diff --git a/tests/unit/components/FilterGroup.spec.ts b/tests/unit/components/FilterGroup.spec.ts
new file mode 100644
index 0000000..ce7320c
--- /dev/null
+++ b/tests/unit/components/FilterGroup.spec.ts
@@ -0,0 +1,107 @@
+import Vuex from 'vuex';
+import { createLocalVue, shallowMount } from '@vue/test-utils';
+import '@/directives';
+import FilterGroup from '@/components/drawer/FilterGroup.vue';
+import { FilterGroup as types } from '@/components/types';
+import { mock } from '../utils';
+
+const localVue = createLocalVue();
+localVue.use(Vuex);
+
+const userConfig = {
+  filter: {
+    foo: 'bar',
+  },
+};
+
+const store = new Vuex.Store({
+  getters: {
+    config() {
+      return userConfig;
+    },
+  },
+  mutations: {
+    updateConfig: jest.fn(),
+  },
+});
+
+function mount(propsData: object) {
+  return shallowMount(FilterGroup, {
+    localVue,
+    store,
+    propsData,
+    stubs: [
+      'v-list-group',
+      'v-list-item',
+      'v-list-item-icon',
+      'v-list-item-title',
+      'v-list-item-content',
+      'v-img',
+    ],
+  });
+}
+
+const emptyGroup: types.Group = {
+  title: '',
+  icon: '',
+  children: [],
+  model: false,
+  select: '',
+};
+
+const emptyChild: types.Child = {
+  title: '',
+  key: null,
+  icon: '',
+  append: null,
+};
+
+const mockGroup = mock(emptyGroup);
+const mockChild = mock(emptyChild);
+
+test('normal create', () => {
+  const group = mockGroup({
+    children: [
+      mockChild({
+        key: 'bar',
+      }),
+    ],
+    select: 'foo',
+    model: true,
+  });
+
+  const wrapper = mount({
+    group,
+  });
+  const vmAny = wrapper.vm as any;
+
+  expect(vmAny.selected).toEqual('bar');
+  expect(vmAny.model).toBeTruthy();
+});
+
+test('manual select child', () => {
+  const group = mockGroup({
+    select: 'foo',
+  });
+
+  const wrapper = mount({
+    group,
+  });
+  const vmAny = wrapper.vm as any;
+
+  vmAny.select('ha');
+  expect(vmAny.selected).toEqual('ha');
+});
+
+test('unselect if can not found children', () => {
+  const group = mockGroup({
+    select: 'foo',
+  });
+
+  const wrapper = mount({
+    group,
+  });
+  const { vm } = wrapper;
+
+  expect((wrapper.vm as any).selected).toBeNull();
+});
diff --git a/tests/unit/store/config.spec.ts b/tests/unit/store/config.spec.ts
new file mode 100644
index 0000000..7e1182b
--- /dev/null
+++ b/tests/unit/store/config.spec.ts
@@ -0,0 +1,82 @@
+import Vuex from 'vuex';
+import { createLocalVue } from '@vue/test-utils';
+import { configStore } from '@/store/config';
+
+
+const localVue = createLocalVue();
+localVue.use(Vuex);
+
+const store = new Vuex.Store({
+  modules: {
+    config: configStore,
+  },
+});
+
+beforeEach(() => {
+  store.replaceState({
+    config: {
+      userConfig: {},
+    },
+  });
+});
+
+test('load config', () => {
+  const spyGet = jest.spyOn(Object.getPrototypeOf(localStorage), 'getItem');
+  spyGet.mockReturnValue('{"foo": "bar"}');
+
+  // eslint-disable-next-line no-shadow
+  const store = new Vuex.Store({
+    modules: {
+      config: configStore,
+    },
+  });
+
+  expect(store.getters.config).toMatchObject({
+    foo: 'bar',
+  });
+
+  spyGet.mockRestore();
+});
+
+test('config getter', () => {
+  expect(store.getters.config).not.toEqual({});
+});
+
+describe('update config', () => {
+  const spySet = jest.spyOn(Object.getPrototypeOf(localStorage), 'setItem');
+
+  beforeEach(() => {
+    spySet.mockClear();
+  });
+  afterAll(() => {
+    spySet.mockRestore();
+  });
+
+  test('update object', () => {
+    store.commit('updateConfig', {
+      key: 'obj',
+      value: {
+        foo: 'bar',
+      },
+    });
+
+    expect(store.getters.config).toMatchObject({
+      obj: {
+        foo: 'bar',
+      },
+    });
+    expect(spySet).toBeCalled();
+  });
+
+  test('update plain type', () => {
+    store.commit('updateConfig', {
+      key: 'foo',
+      value: 'bar',
+    });
+
+    expect(store.getters.config).toMatchObject({
+      foo: 'bar',
+    });
+    expect(spySet).toBeCalled();
+  });
+});
diff --git a/tests/unit/store/index.spec.ts b/tests/unit/store/index.spec.ts
new file mode 100644
index 0000000..e32d253
--- /dev/null
+++ b/tests/unit/store/index.spec.ts
@@ -0,0 +1,62 @@
+import Vuex from 'vuex';
+import { createLocalVue } from '@vue/test-utils';
+import store from '@/store';
+import { RootState } from '@/store/types';
+import { mock, mockBaseTorrent } from '../utils';
+
+
+const localVue = createLocalVue();
+localVue.use(Vuex);
+
+const emtpyState: RootState = {
+  rid: 0,
+  mainData: undefined,
+  preferences: null,
+  pasteUrl: null,
+};
+
+const mockState = mock(emtpyState);
+
+beforeEach(() => {
+  store.replaceState(emtpyState);
+});
+
+test('update preferences', () => {
+  const obj = {
+    url: 'something',
+  };
+  store.commit('updatePreferences', obj);
+
+  expect(store.state.preferences).toEqual(obj);
+});
+
+test('set paste url', () => {
+  store.commit('setPasteUrl', {
+    url: 'something',
+  });
+
+  expect(store.state.pasteUrl).toEqual('something');
+});
+
+describe('all torrents getter', () => {
+  test('empty', () => {
+    expect(store.getters.allTorrents).toEqual([]);
+  });
+
+  test('with data', () => {
+    store.replaceState(mockState({
+      mainData: {
+        categories: {},
+        server_state: undefined as any,
+        torrents: {
+          a: mockBaseTorrent({}),
+          b: mockBaseTorrent({}),
+        },
+      },
+    }));
+
+    expect(store.getters.allTorrents).toMatchObject([
+      { hash: 'a' }, { hash: 'b' },
+    ]);
+  });
+});
diff --git a/tests/unit/utils.ts b/tests/unit/utils.ts
index 851789e..b5b7815 100644
--- a/tests/unit/utils.ts
+++ b/tests/unit/utils.ts
@@ -1,7 +1,6 @@
-import { Torrent } from '@/types';
+import { Torrent, BaseTorrent } from '@/types';
 
-const emptyTorrent: Torrent = {
-  hash: '',
+const emptyBaseTorrent: BaseTorrent = {
   added_on: 0,
   amount_left: 0,
   auto_tmm: false,
@@ -46,6 +45,13 @@ const emptyTorrent: Torrent = {
   upspeed: 0,
 };
 
-export function mockTorrent(props: Partial<Torrent>): Torrent {
-  return Object.assign({}, emptyTorrent, props);
+const emptyTorrent: Torrent = Object.assign({}, emptyBaseTorrent, {
+  hash: '',
+});
+
+export function mock<T>(empty: T) {
+  return (props: Partial<T>): T => Object.assign({}, empty, props);
 }
+
+export const mockBaseTorrent = mock(emptyBaseTorrent);
+export const mockTorrent = mock(emptyTorrent);