Test all values for `enabled_git_access_protocol`

spec/models/user_spec.rb

@@ -576,15 +576,20 @@ describe User, models: true do
       end
     end
 
-    context 'when current_application_settings.enabled_git_access_protocol does not contain SSH' do
-      before do
-        stub_application_setting(enabled_git_access_protocol: 'HTTP')
-      end
-
-      it "doesn't require user to have SSH key" do
+    describe '#require_ssh_key?' do
+      protocol_and_expectation = {
+        'http' => false,
+        'ssh' => true,
+        '' => true,
+      }
+
+      protocol_and_expectation.each do |protocol, expected|
+        it "has correct require_ssh_key?" do
+          stub_application_setting(enabled_git_access_protocol: protocol)
           user = build(:user)
 
-        expect(user.require_ssh_key?).to be_falsey
+          expect(user.require_ssh_key?).to eq(expected)
+        end
       end
     end
   end