Add hosttestlib library.

hosttestlib is a simple JUnit extension framework for tests that need to interact externally (ie
from a host machine) with an Android device.

tools/hosttestlib/src/com/android/hosttest/DeviceTestSuite.java

@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2009 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.hosttest;
+
+import com.android.ddmlib.IDevice;
+
+import junit.framework.Test;
+import junit.framework.TestResult;
+import junit.framework.TestSuite;
+
+/**
+ * Helper JUnit test suite that stores reference to an Android device and test data.
+ */
+public class DeviceTestSuite extends TestSuite implements DeviceTest {
+
+    private IDevice mDevice = null;
+    private String mTestDataPath = null;
+
+    public DeviceTestSuite(Class testClass) {
+        super(testClass);
+    }
+
+    public DeviceTestSuite() {
+        super();
+    }
+
+    /**
+     * Adds the tests from the given class to the suite
+     */
+    @Override
+    public void addTestSuite(Class testClass) {
+        addTest(new DeviceTestSuite(testClass));
+    }
+
+    /**
+     * Overrides parent method to pass in device and test app path to included test
+     */
+    @Override
+    public void runTest(Test test, TestResult result) {
+        if (test instanceof DeviceTest) {
+            DeviceTest deviceTest = (DeviceTest)test;
+            deviceTest.setDevice(mDevice);
+            deviceTest.setTestAppPath(mTestDataPath);
+        }
+        test.run(result);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public IDevice getDevice() {
+        return mDevice;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public String getTestAppPath() {
+        return mTestDataPath;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public void setDevice(IDevice device) {
+        mDevice = device;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public void setTestAppPath(String path) {
+        mTestDataPath = path;
+    }
+}