RDM-4369: Support reserved characters in userId email address

Ensure `GET` request to `/user-profile/users` endpoint uses a fully encoded URL, to allow reserved characters in the `uid` query parameter.

Author: Daniel-Lam

src/test/java/uk/gov/hmcts/ccd/data/user/DefaultUserRepositoryTest.java

@@ -3,6 +3,7 @@
 import java.net.URI;
 import java.util.Arrays;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.Set;
 import java.util.stream.Collectors;
 
@@ -30,6 +31,7 @@
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
+import org.mockito.ArgumentCaptor;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
@@ -240,6 +242,12 @@ void shouldThrowExceptionIfErrorOnRetrievingUserProfile() {
                     () -> userRepository.getUserDefaultSettings(userId),
                     "Expected getUserDefaultSettings() to throw, but it didn't");
             assertThat(serviceException.getMessage(), is("Problem getting user default settings for " + userId));
+
+            // Check that the URL used in the request is encoded correctly, specifically the query string
+            ArgumentCaptor<String> requestUrl = ArgumentCaptor.forClass(String.class);
+            verify(restTemplate).exchange(
+                requestUrl.capture(), same(HttpMethod.GET), any(HttpEntity.class), (Class<?>)any(Class.class));
+            assertThat(requestUrl.getValue(), is("http://test.hmcts.net/users?uid=ccd%2Btest%40hmcts.net"));
         }
     }