1 files changed, 20 insertions, 0 deletions
diff --git a/spec/lib/gitlab/user_extractor_spec.rb b/spec/lib/gitlab/user_extractor_spec.rb
index fcc05ab3a0c..b86ec5445b8 100644
--- a/spec/lib/gitlab/user_extractor_spec.rb
+++ b/spec/lib/gitlab/user_extractor_spec.rb
@@ -38,6 +38,18 @@ describe Gitlab::UserExtractor do
 
       expect(extractor.users).to include(user)
     end
+
+    context 'input as array of strings' do
+      it 'is treated as one string' do
+        extractor = described_class.new(text.lines)
+
+        user_1 = create(:user, username: "USER-1")
+        user_4 = create(:user, username: "USER-4")
+        user_email = create(:user, email: 'user@gitlab.org')
+
+        expect(extractor.users).to contain_exactly(user_1, user_4, user_email)
+      end
+    end
   end
 
   describe '#matches' do
@@ -48,6 +60,14 @@ describe Gitlab::UserExtractor do
     it 'includes all mentioned usernames' do
       expect(extractor.matches[:usernames]).to contain_exactly('user-1', 'user-2', 'user-4')
     end
+
+    context 'input has no matching e-mail or usernames' do
+      it 'returns an empty list of users' do
+        extractor = described_class.new('My test')
+
+        expect(extractor.users).to be_empty
+      end
+    end
   end
 
   describe '#references' do