Added testing of sub groups.

src/test/java/org/gitlab4j/api/AbstractIntegrationTest.java

@@ -28,6 +28,7 @@ public class AbstractIntegrationTest implements PropertyConstants {
     protected static final String TEST_GROUP_PROJECT_NAME = HelperUtils.getProperty(GROUP_PROJECT_KEY);
     protected static final String TEST_NAMESPACE = HelperUtils.getProperty(NAMESPACE_KEY, TEST_LOGIN_USERNAME);
     protected static final String TEST_PRIVATE_TOKEN = HelperUtils.getProperty(PRIVATE_TOKEN_KEY);
+    protected static final String TEST_SUB_GROUP = HelperUtils.getProperty(SUB_GROUP_KEY);
 
     protected static class BaseTestResources {
         protected GitLabApi gitLabApi;

src/test/java/org/gitlab4j/api/IntegrationTestSuite.java

@@ -5,6 +5,7 @@ import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.fail;
 
 import java.util.Arrays;
+import java.util.List;
 import java.util.Optional;
 
 import org.gitlab4j.api.models.Group;
@@ -42,6 +43,7 @@ public class IntegrationTestSuite implements PropertyConstants {
     private static final String TEST_PROJECT_NAME = HelperUtils.getProperty(PROJECT_NAME_KEY);
     private static final String TEST_GROUP = HelperUtils.getProperty(GROUP_KEY);
     private static final String TEST_GROUP_PROJECT_NAME = HelperUtils.getProperty(GROUP_PROJECT_KEY);
+    private static final String TEST_SUB_GROUP = HelperUtils.getProperty(SUB_GROUP_KEY);
 
     protected static final String TEST_PRIVATE_TOKEN_NAME = "GitLab4J Test Private Token - " + HelperUtils.getRandomInt(1000);
     protected static String TEST_PRIVATE_TOKEN = HelperUtils.getProperty(PRIVATE_TOKEN_KEY);
@@ -283,5 +285,19 @@ public class IntegrationTestSuite implements PropertyConstants {
             gitLabApi.getRepositoryFileApi().updateFile(testProject, repoFile, "master", "Updated contents");
             System.out.format("Updated %s repository file in %s%n", repoFile.getFilePath(), TEST_GROUP_PROJECT_NAME);
         }
+
+        // Create a subgroup
+        List<Group> subGroups = gitLabApi.getGroupApi().getSubGroups(TEST_GROUP, null, null, TEST_SUB_GROUP, null, null, null, null);
+        if (subGroups.isEmpty()) {
+            Group groupSettings = new Group()
+                    .withName(TEST_SUB_GROUP)
+                    .withPath(TEST_SUB_GROUP)
+                    .withDescription("Test Sub-Group")
+                    .withVisibility(Visibility.PUBLIC)
+                    .withRequestAccessEnabled(true)
+                    .withParentId(testGroup.getId());
+            Group testSubGroup = gitLabApi.getGroupApi().addGroup(groupSettings);
+            System.out.format("Created %s sub-group (%s)%n", testSubGroup.getName(), testSubGroup.getPath());
+        }
     }
 }

src/test/java/org/gitlab4j/api/PropertyConstants.java

@@ -23,8 +23,9 @@ public interface PropertyConstants {
     public static final String PROXY_PASSWORD_KEY = "TEST_PROXY_PASSWORD";
     public static final String PROXY_URI_KEY = "TEST_PROXY_URI";
     public static final String PROXY_USERNAME_KEY = "TEST_PROXY_USERNAME";
-    public static final String TEST_REQUEST_ACCESS_USERNAME_KEY = "TEST_REQUEST_ACCESS_USERNAME";
+    public static final String SUB_GROUP_KEY = "TEST_SUB_GROUP";
     public static final String SUDO_AS_USERNAME_KEY = "TEST_SUDO_AS_USERNAME";
+    public static final String TEST_REQUEST_ACCESS_USERNAME_KEY = "TEST_REQUEST_ACCESS_USERNAME";
     public static final String USERNAME_KEY = "TEST_USERNAME";
     public static final String XFER_NAMESPACE_KEY = "TEST_XFER_NAMESPACE";
 }

src/test/java/org/gitlab4j/api/TestNamespaceApi.java

@@ -90,6 +90,13 @@ public class TestNamespaceApi extends AbstractIntegrationTest {
         assertEquals(TEST_NAMESPACE, namespaces.get(0).getName());
     }
 
+    @Test
+    public void testFindSubgroupNamespaces() throws GitLabApiException {
+        List<Namespace> namespaces = gitLabApi.getNamespaceApi().findNamespaces(TEST_SUB_GROUP);
+        assertNotNull(namespaces);
+        assertEquals(TEST_SUB_GROUP, namespaces.get(0).getName());
+    }
+
     @Test
     public void testFindNamespacesByPage() throws GitLabApiException {
         List<Namespace> namespaces = gitLabApi.getNamespaceApi().findNamespaces(TEST_NAMESPACE, 1, 10);

src/test/resources/test-gitlab4j.properties

@@ -36,11 +36,12 @@ TEST_BLOCK_USERNAME=user1
 TEST_XFER_NAMESPACE=user1
 TEST_REQUEST_ACCESS_USERNAME=user1
 
-# This specifies the group, a project owned by the specified group, and a username to 
+# This specifies the group, a project owned by the specified group, a username, and a sub-group to 
 # test group membership functionality
 TEST_GROUP=test-group
 TEST_GROUP_PROJECT=test-group-project
 TEST_GROUP_MEMBER_USERNAME=user1
+TEST_SUB_GROUP=subgroup
 
 # OPTIONAL: To test using GitLab4J-API with a proxy, set the following properties
 TEST_PROXY_URI=