Add user auth spec

ee/spec/lib/gitlab/auth/user_auth_finders_spec.rb

@@ -64,4 +64,25 @@ describe Gitlab::Auth::UserAuthFinders do
       it_behaves_like 'find user from job token'
     end
   end
+
+  describe '#find_user_from_scim_token' do
+    let(:token) { create(:personal_access_token, user: user) }
+
+    before do
+      allow(request).to receive(:path).and_return('/api/scim/')
+      allow(self).to receive(:current_request).and_return(request)
+    end
+
+    it "returns an Unauthorized exception for an invalid token" do
+      env['HTTP_AUTHORIZATION'] = "Bearer invalid"
+
+      expect { find_user_from_scim_token }.to raise_error(Gitlab::Auth::UnauthorizedError)
+    end
+
+    it "return user if token is valid" do
+      env['HTTP_AUTHORIZATION'] = "Bearer #{token.token}"
+
+      expect(find_user_from_scim_token).to eq(user)
+    end
+  end
 end