Allow admins to stop impersonating users without e-mail addresses

Resolves #24576

Modify the guard clause of the `ApplicationController#require_email`
before action to skip requests where an admin is impersonating the
current user.

1 files changed, 21 insertions, 7 deletions

diff --git a/spec/controllers/admin/impersonations_controller_spec.rb b/spec/controllers/admin/impersonations_controller_spec.rb
index 8be662974a0..8f1f0ba89ff 100644
--- a/spec/controllers/admin/impersonations_controller_spec.rb
+++ b/spec/controllers/admin/impersonations_controller_spec.rb
@@ -76,18 +76,32 @@ describe Admin::ImpersonationsController do
           end
 
           context "when the impersonator is not blocked" do
-            it "redirects to the impersonated user's page" do
-              expect(Gitlab::AppLogger).to receive(:info).with("User #{impersonator.username} has stopped impersonating #{user.username}").and_call_original
+            shared_examples_for "successfully stops impersonating" do
+              it "redirects to the impersonated user's page" do
+                expect(Gitlab::AppLogger).to receive(:info).with("User #{impersonator.username} has stopped impersonating #{user.username}").and_call_original
 
-              delete :destroy
+                delete :destroy
+
+                expect(response).to redirect_to(admin_user_path(user))
+              end
+
+              it "signs us in as the impersonator" do
+                delete :destroy
 
-              expect(response).to redirect_to(admin_user_path(user))
+                expect(warden.user).to eq(impersonator)
+              end
             end
 
-            it "signs us in as the impersonator" do
-              delete :destroy
+            # base case
+            it_behaves_like "successfully stops impersonating"
+
+            context "and the user has a temporary oauth e-mail address" do
+              before do
+                allow(user).to receive(:temp_oauth_email?).and_return(true)
+                allow(controller).to receive(:current_user).and_return(user)
+              end
 
-              expect(warden.user).to eq(impersonator)
+              it_behaves_like "successfully stops impersonating"
             end
           end
         end