1 files changed, 71 insertions, 0 deletions
diff --git a/spec/lib/gitlab/auth/atlassian/identity_linker_spec.rb b/spec/lib/gitlab/auth/atlassian/identity_linker_spec.rb
new file mode 100644
index 00000000000..ca6b91ac6f1
--- /dev/null
+++ b/spec/lib/gitlab/auth/atlassian/identity_linker_spec.rb
@@ -0,0 +1,71 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Auth::Atlassian::IdentityLinker do
+  let(:user) { create(:user) }
+  let(:extern_uid) { generate(:username) }
+  let(:oauth) do
+    OmniAuth::AuthHash.new(
+      uid: extern_uid,
+      provider: 'atlassian_oauth2',
+      info: { name: 'John', email: 'john@mail.com' },
+      credentials: credentials
+    )
+  end
+
+  let(:credentials) do
+    {
+      token: SecureRandom.alphanumeric(1254),
+      refresh_token: SecureRandom.alphanumeric(45),
+      expires_at: 2.weeks.from_now.to_i,
+      expires: true
+    }
+  end
+
+  subject { described_class.new(user, oauth) }
+
+  context 'linked identity exists' do
+    let!(:identity) { create(:atlassian_identity, user: user, extern_uid: extern_uid) }
+
+    before do
+      subject.link
+    end
+
+    it 'sets #changed? to false' do
+      expect(subject).not_to be_changed
+    end
+
+    it 'does not mark as failed' do
+      expect(subject).not_to be_failed
+    end
+  end
+
+  context 'identity already linked to different user' do
+    let!(:identity) { create(:atlassian_identity, extern_uid: extern_uid) }
+
+    it 'sets #changed? to false' do
+      subject.link
+
+      expect(subject).not_to be_changed
+    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
+    let(:identity) { user.atlassian_identity }
+
+    before do
+      subject.link
+    end
+
+    it_behaves_like 'an atlassian identity'
+
+    it 'sets #changed? to true' do
+      expect(subject).to be_changed
+    end
+  end
+end