Stub out code for a host driven StagedRollbackTest.

The test doesn't test anything meaningful yet, but it builds and runs.

Bug: 124043688
Test: atest StagedRollbackTest
Change-Id: If9b5d57e28846b0ba28a580b74a486bbedb8f8d5

tests/RollbackTest/Android.mk

@@ -89,6 +89,16 @@ LOCAL_SDK_VERSION := system_current
 LOCAL_TEST_CONFIG := RollbackTest.xml
 include $(BUILD_PACKAGE)
 
+# StagedRollbackTest
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := $(call all-java-files-under, StagedRollbackTest/src)
+LOCAL_MODULE := StagedRollbackTest
+LOCAL_MODULE_TAGS := tests
+LOCAL_JAVA_LIBRARIES := tradefed
+LOCAL_COMPATIBILITY_SUITE := general-tests
+LOCAL_TEST_CONFIG := StagedRollbackTest.xml
+include $(BUILD_HOST_JAVA_LIBRARY)
+
 # Clean up local variables
 ROLLBACK_TEST_APP_AV1 :=
 ROLLBACK_TEST_APP_AV2 :=

tests/RollbackTest/README.txt

@@ -5,6 +5,9 @@ Directory structure
 RollbackTest
   - device driven test for rollbacks not involving staged rollbacks.
 
+StagedRollbackTest
+  - device driven test for staged rollbacks.
+
 TestApp
   - source for dummy apks used in testing.
 
@@ -17,3 +20,4 @@ Running the tests
 You can manually run the tests as follows:
 
   atest RollbackTest
+  atest StagedRollbackTest

tests/RollbackTest/StagedRollbackTest.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+-->
+<configuration description="Runs the staged rollback tests">
+    <option name="test-suite-tag" value="StagedRollbackTest" />
+    <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+        <option name="cleanup-apks" value="true" />
+        <option name="test-file-name" value="RollbackTest.apk" />
+    </target_preparer>
+    <test class="com.android.tradefed.testtype.HostTest" >
+        <option name="class" value="com.android.tests.rollback.host.StagedRollbackTest" />
+    </test>
+</configuration>

tests/RollbackTest/StagedRollbackTest/src/com/android/tests/rollback/host/StagedRollbackTest.java

@@ -0,0 +1,38 @@
+/*
+ * 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.android.tests.rollback.host;
+
+import com.android.tradefed.testtype.DeviceJUnit4ClassRunner;
+import com.android.tradefed.testtype.junit4.BaseHostJUnit4Test;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Runs the staged rollback tests.
+ */
+@RunWith(DeviceJUnit4ClassRunner.class)
+public class StagedRollbackTest extends BaseHostJUnit4Test {
+
+    /**
+     * Tests staged rollbacks.
+     */
+    @Test
+    public void testStagedRollback() {
+        // TODO: Actually test staged rollbacks.
+    }
+}