Show error on failed OAuth account link

1 files changed, 20 insertions, 0 deletions

diff --git a/spec/lib/gitlab/auth/o_auth/identity_linker_spec.rb b/spec/lib/gitlab/auth/o_auth/identity_linker_spec.rb
index dc6aa5de53a..8d1b0a3cd4b 100644
--- a/spec/lib/gitlab/auth/o_auth/identity_linker_spec.rb
+++ b/spec/lib/gitlab/auth/o_auth/identity_linker_spec.rb
@@ -14,6 +14,26 @@ describe Gitlab::Auth::OAuth::IdentityLinker do
     it "doesn't create new identity" do
       expect { subject.create_or_update }.not_to change { Identity.count }
     end
+
+    it "#created? returns false" do
+      subject.create_or_update
+
+      expect(subject).not_to be_created
+    end
+  end
+
+  context 'identity already linked to different user' do
+    let!(:identity) {  create(:identity, provider: provider, extern_uid: uid) }
+
+    it "#created? returns false" do
+      subject.create_or_update
+
+      expect(subject).not_to be_created
+    end
+
+    it 'exposes error message' do
+      expect(subject.error_message).to eq 'Extern uid has already been taken'
+    end
   end
 
   context 'identity needs to be created' do