added test for bugfix

Author: dwasinge

src/test/java/com/redhat/labs/omp/mocks/MockGitLabService.java

@@ -61,6 +61,9 @@ public List<Group> getGroupByName(String name) {
             groupList.add(Group.builder().id(3).name("customer1").path("customer1").build());
         } else if ("project4".equalsIgnoreCase(name)) {
             groupList.add(Group.builder().id(4).name("project1").path("project1").build());
+        } else if ("customer".equalsIgnoreCase(name)) {
+            groupList.add(Group.builder().id(11).name("customerA").path("customerA").parentId(10).build());
+            groupList.add(Group.builder().id(12).name("customer").path("customer").parentId(10).build());
         }
 
         return groupList;

src/test/java/com/redhat/labs/omp/service/GroupServiceTest.java

@@ -0,0 +1,44 @@
+package com.redhat.labs.omp.service;
+
+import java.util.Optional;
+
+import javax.inject.Inject;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import com.redhat.labs.omp.models.gitlab.Group;
+
+import io.quarkus.test.junit.QuarkusTest;
+
+@QuarkusTest
+public class GroupServiceTest {
+
+    @Inject
+    GroupService groupService;
+    
+    @Test
+    public void testGetGitLabGroupByNameNoGroupsExist() {
+
+        Optional<Group> optional = groupService.getGitLabGroupByName("customerA", 1);
+        Assertions.assertFalse(optional.isPresent());
+
+    }
+
+    @Test
+    public void testGetGitLabGroupByNameMultipleGroupsExistNoMatch() {
+
+        Optional<Group> optional = groupService.getGitLabGroupByName("customer", 1);
+        Assertions.assertFalse(optional.isPresent());
+
+    }
+
+    @Test
+    public void testGetGitLabGroupByNameMultipleGroupsExistMatch() {
+
+        Optional<Group> optional = groupService.getGitLabGroupByName("customer", 10);
+        Assertions.assertTrue(optional.isPresent());
+
+    }
+
+}