1 files changed, 46 insertions, 0 deletions
diff --git a/spec/finders/merge_requests/oldest_per_commit_finder_spec.rb b/spec/finders/merge_requests/oldest_per_commit_finder_spec.rb
new file mode 100644
index 00000000000..4e9d021fa5d
--- /dev/null
+++ b/spec/finders/merge_requests/oldest_per_commit_finder_spec.rb
@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe MergeRequests::OldestPerCommitFinder do
+  describe '#execute' do
+    it 'returns a Hash mapping commit SHAs to their oldest merge requests' do
+      project = create(:project)
+      mr1 = create(:merge_request, :merged, target_project: project)
+      mr2 = create(:merge_request, :merged, target_project: project)
+      mr1_diff = create(:merge_request_diff, merge_request: mr1)
+      mr2_diff = create(:merge_request_diff, merge_request: mr2)
+      sha1 = Digest::SHA1.hexdigest('foo')
+      sha2 = Digest::SHA1.hexdigest('bar')
+
+      create(:merge_request_diff_commit, merge_request_diff: mr1_diff, sha: sha1)
+      create(:merge_request_diff_commit, merge_request_diff: mr2_diff, sha: sha1)
+      create(
+        :merge_request_diff_commit,
+        merge_request_diff: mr2_diff,
+        sha: sha2,
+        relative_order: 1
+      )
+
+      commits = [double(:commit, id: sha1), double(:commit, id: sha2)]
+
+      expect(described_class.new(project).execute(commits)).to eq(
+        sha1 => mr1,
+        sha2 => mr2
+      )
+    end
+
+    it 'skips merge requests that are not merged' do
+      mr = create(:merge_request)
+      mr_diff = create(:merge_request_diff, merge_request: mr)
+      sha = Digest::SHA1.hexdigest('foo')
+
+      create(:merge_request_diff_commit, merge_request_diff: mr_diff, sha: sha)
+
+      commits = [double(:commit, id: sha)]
+
+      expect(described_class.new(mr.target_project).execute(commits))
+        .to be_empty
+    end
+  end
+end