Merge branch 'zj-expose-coverage-pipelines' into 'master'

Expose coverage on GET pipelines/:id

Closes gitlab-org/gitlab-ce#24801

See merge request !7670

changelogs/unreleased/zj-expose-coverage-pipelines.yml

+---
+title: 'API: expose pipeline coverage'
+merge_request: 
+author: 

doc/api/pipelines.md

@@ -41,7 +41,8 @@ Example of response
     "started_at": null,
     "finished_at": null,
     "committed_at": null,
-    "duration": null
+    "duration": null,
+    "coverage": "30.0"
   },
   {
     "id": 48,
@@ -64,7 +65,8 @@ Example of response
     "started_at": null,
     "finished_at": null,
     "committed_at": null,
-    "duration": null
+    "duration": null,
+    "coverage": null
   }
 ]
 ```
@@ -110,7 +112,8 @@ Example of response
   "started_at": null,
   "finished_at": "2016-08-11T11:32:35.145Z",
   "committed_at": null,
-  "duration": null
+  "duration": null,
+  "coverage": "30.0"
 }
 ```
@@ -155,7 +158,8 @@ Example of response
   "started_at": null,
   "finished_at": null,
   "committed_at": null,
-  "duration": null
+  "duration": null,
+  "coverage": null
 }
 ```
@@ -200,7 +204,8 @@ Response:
   "started_at": null,
   "finished_at": "2016-08-11T11:32:35.145Z",
   "committed_at": null,
-  "duration": null
+  "duration": null,
+  "coverage": null
 }
 ```
@@ -245,7 +250,8 @@ Response:
   "started_at": null,
   "finished_at": "2016-08-11T11:32:35.145Z",
   "committed_at": null,
-  "duration": null
+  "duration": null,
+  "coverage": null
 }
 ```

lib/api/entities.rb

@@ -607,6 +607,7 @@ module API
       expose :user, with: Entities::UserBasic
       expose :created_at, :updated_at, :started_at, :finished_at, :committed_at
       expose :duration
+      expose :coverage
     end
     class EnvironmentBasic < Grape::Entity

spec/requests/api/pipelines_spec.rb

@@ -103,6 +103,18 @@ describe API::API, api: true do
         expect(json_response['message']).to eq '404 Not found'
         expect(json_response['id']).to be nil
       end
+
+      context 'with coverage' do
+        before do
+          create(:ci_build, coverage: 30, pipeline: pipeline)
+        end
+
+        it 'exposes the coverage' do
+          get api("/projects/#{project.id}/pipelines/#{pipeline.id}", user)
+
+          expect(json_response["coverage"].to_i).to eq(30)
+        end
+      end
     end
     context 'unauthorized user' do