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diff --git a/java/com/google/gerrit/acceptance/testsuite/group/GroupOperations.java b/java/com/google/gerrit/acceptance/testsuite/group/GroupOperations.java
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+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.acceptance.testsuite.group;
+
+import com.google.gerrit.reviewdb.client.AccountGroup;
+
+/**
+ * An aggregation of operations on groups for test purposes.
+ *
+ * <p>To execute the operations, no Gerrit permissions are necessary.
+ *
+ * <p><strong>Note:</strong> This interface is not implemented using the REST or extension API.
+ * Hence, it cannot be used for testing those APIs.
+ */
+public interface GroupOperations {
+  /**
+   * Starts the fluent chain for querying or modifying a group. Please see the methods of {@link
+   * MoreGroupOperations} for details on possible operations.
+   *
+   * @return an aggregation of operations on a specific group
+   */
+  MoreGroupOperations group(AccountGroup.UUID groupUuid);
+
+  /**
+   * Starts the fluent chain to create a group. The returned builder can be used to specify the
+   * attributes of the new group. To create the group for real, {@link
+   * TestGroupCreation.Builder#create()} must be called.
+   *
+   * <p>Example:
+   *
+   * <pre>
+   * AccountGroup.UUID createdGroupUuid = groupOperations
+   *     .newGroup()
+   *     .name("verifiers")
+   *     .description("All verifiers of this server")
+   *     .create();
+   * </pre>
+   *
+   * <p><strong>Note:</strong> If another group with the provided name already exists, the creation
+   * of the group will fail.
+   *
+   * @return a builder to create the new group
+   */
+  TestGroupCreation.Builder newGroup();
+
+  /** An aggregation of methods on a specific group. */
+  interface MoreGroupOperations {
+
+    /**
+     * Checks whether the group exists.
+     *
+     * @return {@code true} if the group exists
+     */
+    boolean exists() throws Exception;
+
+    /**
+     * Retrieves the group.
+     *
+     * <p><strong>Note:</strong> This call will fail with an exception if the requested group
+     * doesn't exist. If you want to check for the existence of a group, use {@link #exists()}
+     * instead.
+     *
+     * @return the corresponding {@code TestGroup}
+     */
+    TestGroup get() throws Exception;
+
+    /**
+     * Starts the fluent chain to update a group. The returned builder can be used to specify how
+     * the attributes of the group should be modified. To update the group for real, {@link
+     * TestGroupUpdate.Builder#update()} must be called.
+     *
+     * <p>Example:
+     *
+     * <pre>
+     * groupOperations.forUpdate().description("Another description for this group").update();
+     * </pre>
+     *
+     * <p><strong>Note:</strong> The update will fail with an exception if the group to update
+     * doesn't exist. If you want to check for the existence of a group, use {@link #exists()}.
+     *
+     * @return a builder to update the group
+     */
+    TestGroupUpdate.Builder forUpdate();
+  }
+}