Show Download diff links in closed MRs

Download MR diffs links were only available for open MRs,
however it may still be useful for closed MRs.

app/assets/javascripts/vue_merge_request_widget/components/mr_widget_header.vue

@@ -109,29 +109,31 @@ export default {
         ></div>
       </div>
-      <div v-if="mr.isOpen" class="branch-actions d-flex">
-        <a
-          v-if="!mr.sourceBranchRemoved"
-          v-tooltip
-          :href="webIdePath"
-          :title="ideButtonTitle"
-          :class="{ disabled: !mr.canPushToSourceBranch }"
-          class="btn btn-default js-web-ide d-none d-md-inline-block append-right-8"
-          data-placement="bottom"
-          tabindex="0"
-          role="button"
-        >
-          {{ s__('mrWidget|Open in Web IDE') }}
-        </a>
-        <button
-          :disabled="mr.sourceBranchRemoved"
-          data-target="#modal_merge_info"
-          data-toggle="modal"
-          class="btn btn-default js-check-out-branch append-right-default"
-          type="button"
-        >
-          {{ s__('mrWidget|Check out branch') }}
-        </button>
+      <div class="branch-actions d-flex">
+        <template v-if="mr.isOpen">
+          <a
+            v-if="!mr.sourceBranchRemoved"
+            v-tooltip
+            :href="webIdePath"
+            :title="ideButtonTitle"
+            :class="{ disabled: !mr.canPushToSourceBranch }"
+            class="btn btn-default js-web-ide d-none d-md-inline-block append-right-8"
+            data-placement="bottom"
+            tabindex="0"
+            role="button"
+          >
+            {{ s__('mrWidget|Open in Web IDE') }}
+          </a>
+          <button
+            :disabled="mr.sourceBranchRemoved"
+            data-target="#modal_merge_info"
+            data-toggle="modal"
+            class="btn btn-default js-check-out-branch append-right-default"
+            type="button"
+          >
+            {{ s__('mrWidget|Check out branch') }}
+          </button>
+        </template>
         <span class="dropdown">
           <button
             type="button"

changelogs/unreleased/29249-show-download-diff-even-when-merge-request-is-closed.yml

+---
+title: Show download diff links for closed MRs
+merge_request: 26772
+author:
+type: changed

spec/javascripts/vue_mr_widget/components/mr_widget_header_spec.js

@@ -15,6 +15,16 @@ describe('MRWidgetHeader', () => {
     gon.relative_url_root = '';
   });
+  const expectDownloadDropdownItems = () => {
+    const downloadEmailPatchesEl = vm.$el.querySelector('.js-download-email-patches');
+    const downloadPlainDiffEl = vm.$el.querySelector('.js-download-plain-diff');
+
+    expect(downloadEmailPatchesEl.textContent.trim()).toEqual('Email patches');
+    expect(downloadEmailPatchesEl.getAttribute('href')).toEqual('/mr/email-patches');
+    expect(downloadPlainDiffEl.textContent.trim()).toEqual('Plain diff');
+    expect(downloadPlainDiffEl.getAttribute('href')).toEqual('/mr/plainDiffPath');
+  };
+
   describe('computed', () => {
     describe('shouldShowCommitsBehindText', () => {
       it('return true when there are divergedCommitsCount', () => {
@@ -207,21 +217,7 @@ describe('MRWidgetHeader', () => {
       });
       it('renders download dropdown with links', () => {
-        expect(vm.$el.querySelector('.js-download-email-patches').textContent.trim()).toEqual(
-          'Email patches',
-        );
-
-        expect(vm.$el.querySelector('.js-download-email-patches').getAttribute('href')).toEqual(
-          '/mr/email-patches',
-        );
-
-        expect(vm.$el.querySelector('.js-download-plain-diff').textContent.trim()).toEqual(
-          'Plain diff',
-        );
-
-        expect(vm.$el.querySelector('.js-download-plain-diff').getAttribute('href')).toEqual(
-          '/mr/plainDiffPath',
-        );
+        expectDownloadDropdownItems();
       });
     });
@@ -250,10 +246,8 @@ describe('MRWidgetHeader', () => {
         expect(button).toEqual(null);
       });
-      it('does not render download dropdown with links', () => {
-        expect(vm.$el.querySelector('.js-download-email-patches')).toEqual(null);
-
-        expect(vm.$el.querySelector('.js-download-plain-diff')).toEqual(null);
+      it('renders download dropdown with links', () => {
+        expectDownloadDropdownItems();
       });
     });