diff --git a/webapp/components/FilterMenu/EmotionsFilter.spec.js b/webapp/components/FilterMenu/EmotionsFilter.spec.js
new file mode 100644
index 000000000..c7aa452d9
--- /dev/null
+++ b/webapp/components/FilterMenu/EmotionsFilter.spec.js
@@ -0,0 +1,64 @@
+import { mount } from '@vue/test-utils'
+import Vuex from 'vuex'
+import EmotionsFilter from './EmotionsFilter'
+
+const localVue = global.localVue
+
+let wrapper, happyEmotionButton
+
+describe('EmotionsFilter', () => {
+  const mutations = {
+    'posts/TOGGLE_EMOTION': jest.fn(),
+    'posts/RESET_EMOTIONS': jest.fn(),
+  }
+  const getters = {
+    'posts/filteredByEmotions': jest.fn(() => []),
+  }
+
+  const mocks = {
+    $t: jest.fn(string => string),
+  }
+
+  const Wrapper = () => {
+    const store = new Vuex.Store({ mutations, getters })
+    return mount(EmotionsFilter, { mocks, localVue, store })
+  }
+
+  beforeEach(() => {
+    wrapper = Wrapper()
+  })
+
+  describe('mount', () => {
+    it('starts with all emotions button active', () => {
+      const allEmotionsButton = wrapper.find('.emotions-filter > .labeled-button > .base-button')
+      expect(allEmotionsButton.attributes().class).toContain('--filled')
+    })
+
+    describe('click on an "emotion-button" button', () => {
+      it('calls TOGGLE_EMOTION when clicked', () => {
+        const wrapper = Wrapper()
+        happyEmotionButton = wrapper.findAll('.emotion-button > .base-button').at(1)
+        happyEmotionButton.trigger('click')
+        expect(mutations['posts/TOGGLE_EMOTION']).toHaveBeenCalledWith({}, 'happy')
+      })
+
+      it('sets the attribute `src` to colorized image', () => {
+        getters['posts/filteredByEmotions'] = jest.fn(() => ['happy'])
+        const wrapper = Wrapper()
+        happyEmotionButton = wrapper.findAll('.emotion-button > .base-button').at(1)
+        const happyEmotionButtonImage = happyEmotionButton.find('img')
+        expect(happyEmotionButtonImage.attributes().src).toEqual('/img/svg/emoji/happy_color.svg')
+      })
+    })
+
+    describe('clears filter', () => {
+      it('when all button is clicked', async () => {
+        getters['posts/filteredByEmotions'] = jest.fn(() => ['happy'])
+        wrapper = await Wrapper()
+        const allEmotionsButton = wrapper.find('.emotions-filter > .labeled-button > .base-button')
+        allEmotionsButton.trigger('click')
+        expect(mutations['posts/RESET_EMOTIONS']).toHaveBeenCalledTimes(1)
+      })
+    })
+  })
+})
diff --git a/webapp/components/FilterMenu/EmotionsFilter.vue b/webapp/components/FilterMenu/EmotionsFilter.vue
index 4cbc16e57..974227f11 100644
--- a/webapp/components/FilterMenu/EmotionsFilter.vue
+++ b/webapp/components/FilterMenu/EmotionsFilter.vue
@@ -1,5 +1,5 @@
 <template>
-  <section class="emotion-filter">
+  <section class="emotions-filter">
     <h4 class="title">{{ $t('filter-menu.emotions') }}</h4>
     <labeled-button
       :filled="!filteredByEmotions.length"
@@ -53,7 +53,7 @@ export default {
 }
 </script>
 <style lang="scss">
-.emotion-filter {
+.emotions-filter {
   display: flex;
   flex-wrap: wrap;
   margin-top: $space-base;