Add committers and authors methods on MergeRequest

These are used by the EE-only approvers feature

1 files changed, 24 insertions, 1 deletions

diff --git a/spec/models/commit_collection_spec.rb b/spec/models/commit_collection_spec.rb
index 066fe7d154e..005005b236b 100644
--- a/spec/models/commit_collection_spec.rb
+++ b/spec/models/commit_collection_spec.rb
@@ -2,7 +2,7 @@ require 'spec_helper'
 
 describe CommitCollection do
   let(:project) { create(:project, :repository) }
-  let(:commit) { project.commit }
+  let(:commit) { project.commit("c1c67abbaf91f624347bb3ae96eabe3a1b742478") }
 
   describe '#each' do
     it 'yields every commit' do
@@ -12,6 +12,29 @@ describe CommitCollection do
     end
   end
 
+  describe '.committers' do
+    it 'returns a relation of users when users are found' do
+      user = create(:user, email: commit.committer_email.upcase)
+      collection = described_class.new(project, [commit])
+
+      expect(collection.committers).to contain_exactly(user)
+    end
+
+    it 'returns empty array when committers cannot be found' do
+      collection = described_class.new(project, [commit])
+
+      expect(collection.committers).to be_empty
+    end
+
+    it 'excludes authors of merge commits' do
+      commit = project.commit("60ecb67744cb56576c30214ff52294f8ce2def98")
+      create(:user, email: commit.committer_email.upcase)
+      collection = described_class.new(project, [commit])
+
+      expect(collection.committers).to be_empty
+    end
+  end
+
   describe '#with_pipeline_status' do
     it 'sets the pipeline status for every commit so no additional queries are necessary' do
       create(