Create `get_build` for project model

Inside of `Projects::ArtifactsController` and
`Projects::BuildArtifactsController` we fetching the build by id using
active record directly which violates `CodeReuse/ActiveRecord` rubocop
rule. Create `get_build` inside of `project` model which does the same
thing.

1 files changed, 23 insertions, 0 deletions

diff --git a/spec/models/project_spec.rb b/spec/models/project_spec.rb
index aa4ec6493db..b12b81f8f38 100644
--- a/spec/models/project_spec.rb
+++ b/spec/models/project_spec.rb
@@ -2000,6 +2000,29 @@ describe Project do
     end
   end
 
+  describe '#get_build' do
+    let(:project) { create(:project, :repository) }
+    let(:ci_pipeline) { create(:ci_pipeline, project: project) }
+
+    context 'when build exists' do
+      context 'build is associated with project' do
+        let(:build) { create(:ci_build, :success, pipeline: ci_pipeline) }
+
+        it { expect(project.get_build(build.id)).to eq(build) }
+      end
+
+      context 'build is not associated with project' do
+        let(:build) { create(:ci_build, :success) }
+
+        it { expect(project.get_build(build.id)).to be_nil }
+      end
+    end
+
+    context 'build does not exists' do
+      it { expect(project.get_build(rand 100)).to be_nil }
+    end
+  end
+
   describe '#import_status' do
     context 'with import_state' do
       it 'returns the right status' do