Merge branch 'api-version' into 'master'

API: Version information

## What does this MR do?

Adds a new endpoint to retrieve the version information.

## Why was this MR needed?

Clients can now use this information to enable/disable certain API features depending on the version.  

## What are the relevant issue numbers?

Closes #22608, https://gitlab.com/gitlab-org/gitlab-ce/issues/23148

See merge request !6822

1 files changed, 27 insertions, 0 deletions

diff --git a/spec/requests/api/version_spec.rb b/spec/requests/api/version_spec.rb
new file mode 100644
index 00000000000..54b69a0cae7
--- /dev/null
+++ b/spec/requests/api/version_spec.rb
@@ -0,0 +1,27 @@
+require 'spec_helper'
+
+describe API::API, api: true do
+  include ApiHelpers
+
+  describe 'GET /version' do
+    context 'when unauthenticated' do
+      it 'returns authentication error' do
+        get api('/version')
+
+        expect(response).to have_http_status(401)
+      end
+    end
+
+    context 'when authenticated' do
+      let(:user) { create(:user) }
+
+      it 'returns the version information' do
+        get api('/version', user)
+
+        expect(response).to have_http_status(200)
+        expect(json_response['version']).to eq(Gitlab::VERSION)
+        expect(json_response['revision']).to eq(Gitlab::REVISION)
+      end
+    end
+  end
+end