Add stub module for integration tests

The initial version only includes an empty test. The purpose is only to
ensure that the plugin can be loaded. The test fails if the fix that was
done in change I621573b52 is reverted.

Additional tests of the plugin's actual functionality may be added later.

Bug: Issue 10132
Change-Id: Ie64b2c686e8003b456fcad68de9e1c33a98fd2cc
diff --git a/BUILD b/BUILD
index 4f332ac..a40d415 100644
--- a/BUILD
+++ b/BUILD
@@ -1,4 +1,5 @@
-load("//tools/bzl:plugin.bzl", "gerrit_plugin")
+load("//tools/bzl:junit.bzl", "junit_tests")
+load("//tools/bzl:plugin.bzl", "PLUGIN_DEPS", "PLUGIN_TEST_DEPS", "gerrit_plugin")
 
 gerrit_plugin(
     name = "hooks",
@@ -9,3 +10,13 @@
     ],
     resources = glob(["src/main/resources/**/*"]),
 )
+
+junit_tests(
+    name = "hooks_tests",
+    srcs = glob(["src/test/java/**/*Test.java"]),
+    tags = ["hooks"],
+    visibility = ["//visibility:public"],
+    deps = PLUGIN_TEST_DEPS + PLUGIN_DEPS + [
+        ":hooks__plugin",
+    ],
+)
diff --git a/src/test/java/com/googlesource/gerrit/plugins/hooks/HooksIT.java b/src/test/java/com/googlesource/gerrit/plugins/hooks/HooksIT.java
new file mode 100644
index 0000000..bcf2d20
--- /dev/null
+++ b/src/test/java/com/googlesource/gerrit/plugins/hooks/HooksIT.java
@@ -0,0 +1,28 @@
+// Copyright (C) 2019 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.googlesource.gerrit.plugins.hooks;
+
+import com.google.gerrit.acceptance.LightweightPluginDaemonTest;
+import com.google.gerrit.acceptance.NoHttpd;
+import com.google.gerrit.acceptance.TestPlugin;
+import org.junit.Test;
+
+@NoHttpd
+@TestPlugin(name = "hooks", sysModule = "com.googlesource.gerrit.plugins.hooks.Module")
+public class HooksIT extends LightweightPluginDaemonTest {
+
+  @Test
+  public void doNothing() throws Exception {}
+}