refactor(NoteableDiscussion): Extracted ResolveDiscussionButton from

app/assets/javascripts/notes/components/discussion_resolve_button.vue

+<script>
+export default {
+  name: 'ResolveDiscussionButton',
+  props: {
+    isResolving: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    buttonTitle: {
+      type: String,
+      required: true,
+    },
+  },
+};
+</script>
+
+<template>
+  <button ref="button" type="button" class="btn btn-default ml-sm-2" @click="$emit('onClick')">
+    <i
+      v-if="isResolving"
+      ref="isResolvingIcon"
+      aria-hidden="true"
+      class="fa fa-spinner fa-spin"
+    ></i>
+    {{ buttonTitle }}
+  </button>
+</template>

app/assets/javascripts/notes/components/noteable_discussion.vue

@@ -12,6 +12,7 @@ import { SYSTEM_NOTE } from '../constants';
 import userAvatarLink from '../../vue_shared/components/user_avatar/user_avatar_link.vue';
 import noteableNote from './noteable_note.vue';
 import noteHeader from './note_header.vue';
+import resolveDiscussionButton from './discussion_resolve_button.vue';
 import toggleRepliesWidget from './toggle_replies_widget.vue';
 import noteSignedOutWidget from './note_signed_out_widget.vue';
 import noteEditedText from './note_edited_text.vue';
@@ -35,6 +36,7 @@ export default {
     noteSignedOutWidget,
     noteEditedText,
     noteForm,
+    resolveDiscussionButton,
     jumpToNextDiscussionButton,
     toggleRepliesWidget,
     placeholderNote,
@@ -453,16 +455,12 @@ Please check your network connection and try again.`;
                     >
                       Reply...
                     </button>
-                    <div v-if="discussion.resolvable">
-                      <button
-                        type="button"
-                        class="btn btn-default ml-sm-2"
-                        @click="resolveHandler()"
-                      >
-                        <i v-if="isResolving" aria-hidden="true" class="fa fa-spinner fa-spin"></i>
-                        {{ resolveButtonTitle }}
-                      </button>
-                    </div>
+                    <resolve-discussion-button
+                      v-if="discussion.resolvable"
+                      :is-resolving="isResolving"
+                      :button-title="resolveButtonTitle"
+                      @onClick="resolveHandler"
+                    />
                     <div
                       v-if="discussion.resolvable"
                       class="btn-group discussion-actions ml-sm-2"

changelogs/unreleased/refactor-56366-extract-resolve-discussion-button.yml

+---
+title: Refactored NoteableDiscussion by extracting ResolveDiscussionButton
+merge_request: 24505
+author: Martin Hobert
+type: other

spec/javascripts/notes/components/discussion_resolve_button_spec.js

+import resolveDiscussionButton from '~/notes/components/discussion_resolve_button.vue';
+import { createLocalVue, shallowMount } from '@vue/test-utils';
+
+const buttonTitle = 'Resolve discussion';
+
+describe('resolveDiscussionButton', () => {
+  let wrapper;
+  let localVue;
+
+  const factory = options => {
+    localVue = createLocalVue();
+    wrapper = shallowMount(resolveDiscussionButton, {
+      localVue,
+      ...options,
+    });
+  };
+
+  beforeEach(() => {
+    factory({
+      propsData: {
+        isResolving: false,
+        buttonTitle,
+      },
+    });
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('should emit a onClick event on button click', () => {
+    const button = wrapper.find({ ref: 'button' });
+
+    button.trigger('click');
+
+    expect(wrapper.emitted()).toEqual({
+      onClick: [[]],
+    });
+  });
+
+  it('should contain the provided button title', () => {
+    const button = wrapper.find({ ref: 'button' });
+
+    expect(button.text()).toContain(buttonTitle);
+  });
+
+  it('should show a loading spinner while resolving', () => {
+    factory({
+      propsData: {
+        isResolving: true,
+        buttonTitle,
+      },
+    });
+
+    const button = wrapper.find({ ref: 'isResolvingIcon' });
+
+    expect(button.exists()).toEqual(true);
+  });
+
+  it('should only show a loading spinner while resolving', () => {
+    factory({
+      propsData: {
+        isResolving: false,
+        buttonTitle,
+      },
+    });
+
+    const button = wrapper.find({ ref: 'isResolvingIcon' });
+
+    localVue.nextTick(() => {
+      expect(button.exists()).toEqual(false);
+    });
+  });
+});