Merge branch 'api-isssues-due-date' into 'master'

API: Expose due_date for issues

## What does this MR do?

Add support for the `due_date` of issues to the API.

## What are the relevant issue numbers?

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/18696

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5212

1 files changed, 25 insertions, 0 deletions

diff --git a/spec/requests/api/issues_spec.rb b/spec/requests/api/issues_spec.rb
index 6adccb4ebae..12f2cfa6942 100644
--- a/spec/requests/api/issues_spec.rb
+++ b/spec/requests/api/issues_spec.rb
@@ -503,6 +503,20 @@ describe API::API, api: true  do
       ])
     end
 
+    context 'with due date' do
+      it 'creates a new project issue' do
+        due_date = 2.weeks.from_now.strftime('%Y-%m-%d')
+
+        post api("/projects/#{project.id}/issues", user),
+          title: 'new issue', due_date: due_date
+
+        expect(response).to have_http_status(201)
+        expect(json_response['title']).to eq('new issue')
+        expect(json_response['description']).to be_nil
+        expect(json_response['due_date']).to eq(due_date)
+      end
+    end
+
     context 'when an admin or owner makes the request' do
       it 'accepts the creation date to be set' do
         creation_time = 2.weeks.ago
@@ -683,6 +697,17 @@ describe API::API, api: true  do
     end
   end
 
+  describe 'PUT /projects/:id/issues/:issue_id to update due date' do
+    it 'creates a new project issue' do
+      due_date = 2.weeks.from_now.strftime('%Y-%m-%d')
+
+      put api("/projects/#{project.id}/issues/#{issue.id}", user), due_date: due_date
+
+      expect(response).to have_http_status(200)
+      expect(json_response['due_date']).to eq(due_date)
+    end
+  end
+
   describe "DELETE /projects/:id/issues/:issue_id" do
     it "rejects a non member from deleting an issue" do
       delete api("/projects/#{project.id}/issues/#{issue.id}", non_member)