1 files changed, 52 insertions, 0 deletions
diff --git a/spec/lib/gitlab/git_post_receive_spec.rb b/spec/lib/gitlab/git_post_receive_spec.rb
new file mode 100644
index 00000000000..f4a10d8d984
--- /dev/null
+++ b/spec/lib/gitlab/git_post_receive_spec.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe ::Gitlab::GitPostReceive do
+  let(:project) { create(:project) }
+
+  subject { described_class.new(project, "project-#{project.id}", changes.dup, {}) }
+
+  describe '#branches_exist?' do
+    context 'with no branches' do
+      let(:changes) do
+        <<~EOF
+          654321 210987 refs/nobranches/tag1
+          654322 210986 refs/tags/test1
+          654323 210985 refs/merge-requests/mr1
+        EOF
+      end
+
+      it 'returns false' do
+        expect(subject.branches_exist?).to be_falsey
+      end
+    end
+
+    context 'with branches' do
+      let(:changes) do
+        <<~EOF
+          654322 210986 refs/heads/test1
+          654321 210987 refs/tags/tag1
+          654323 210985 refs/merge-requests/mr1
+        EOF
+      end
+
+      it 'returns true' do
+        expect(subject.branches_exist?).to be_truthy
+      end
+    end
+
+    context 'with malformed changes' do
+      let(:changes) do
+        <<~EOF
+          ref/heads/1 a
+          somebranch refs/heads/2
+        EOF
+      end
+
+      it 'returns false' do
+        expect(subject.branches_exist?).to be_falsey
+      end
+    end
+  end
+end