[view_compiler] Add end-to-end DexBuilder tests

These tests verify that code produced by DexBuilder can be loaded and run on
device. It works by introducing a new tool, dex_testcase_generator, which writes
out a couple of DEX files with test cases. This tool runs as a build step. The
generated DEX are then copied over to the device where they are loaded and run
the on-device DexBuilderTest.

Bug: 111895153

Change-Id: I06f5edd0e3e2f4e9ec2d14a0db7d22b75b424119

4 files changed, 160 insertions, 0 deletions

diff --git a/startop/view_compiler/dex_builder_test/Android.bp b/startop/view_compiler/dex_builder_test/Android.bp
new file mode 100644
index 000000000000..4449ea0f707e
--- /dev/null
+++ b/startop/view_compiler/dex_builder_test/Android.bp
@@ -0,0 +1,29 @@
+//
+// 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.
+//
+
+android_test {
+    name: "dex-builder-test",
+    srcs: ["src/android/startop/test/DexBuilderTest.java"],
+    sdk_version: "current",
+    data: [":generate_dex_testcases"],
+    static_libs: [
+        "android-support-test",
+        "guava",
+    ],
+    manifest: "AndroidManifest.xml",
+    test_config: "AndroidTest.xml",
+    test_suites: ["general-tests"],
+}
diff --git a/startop/view_compiler/dex_builder_test/AndroidManifest.xml b/startop/view_compiler/dex_builder_test/AndroidManifest.xml
new file mode 100644
index 000000000000..6ac5fc5db345
--- /dev/null
+++ b/startop/view_compiler/dex_builder_test/AndroidManifest.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+-->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="android.startop.test" >
+
+    <uses-sdk android:minSdkVersion="28" android:targetSdkVersion="28" />
+
+    <application>
+        <uses-library android:name="android.test.runner" />
+    </application>
+
+    <instrumentation android:name="android.support.test.runner.AndroidJUnitRunner"
+                     android:targetPackage="android.startop.test"
+                     android:label="DexBuilder Tests"/>
+
+</manifest>
diff --git a/startop/view_compiler/dex_builder_test/AndroidTest.xml b/startop/view_compiler/dex_builder_test/AndroidTest.xml
new file mode 100644
index 000000000000..6f90cf3b81a7
--- /dev/null
+++ b/startop/view_compiler/dex_builder_test/AndroidTest.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+-->
+<configuration description="Runs DexBuilder Tests.">
+    <option name="test-suite-tag" value="apct" />
+    <option name="test-suite-tag" value="apct-instrumentation" />
+    <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+        <option name="cleanup-apks" value="true" />
+        <option name="test-file-name" value="dex-builder-test.apk" />
+    </target_preparer>
+
+    <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+        <option name="cleanup" value="true" />
+        <option name="push" value="trivial.dex->/data/local/tmp/dex-builder-test/trivial.dex" />
+        <option name="push" value="simple.dex->/data/local/tmp/dex-builder-test/simple.dex" />
+    </target_preparer>
+
+    <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
+        <option name="package" value="android.startop.test" />
+        <option name="runner" value="android.support.test.runner.AndroidJUnitRunner" />
+    </test>
+</configuration>
diff --git a/startop/view_compiler/dex_builder_test/src/android/startop/test/DexBuilderTest.java b/startop/view_compiler/dex_builder_test/src/android/startop/test/DexBuilderTest.java
new file mode 100644
index 000000000000..87b25780aaa8
--- /dev/null
+++ b/startop/view_compiler/dex_builder_test/src/android/startop/test/DexBuilderTest.java
@@ -0,0 +1,68 @@
+/*
+ * 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 android.startop.test;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import com.google.common.io.ByteStreams;
+import dalvik.system.InMemoryDexClassLoader;
+import dalvik.system.PathClassLoader;
+import java.io.InputStream;
+import java.lang.reflect.Method;
+import java.nio.ByteBuffer;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Adding tests here requires changes in several other places. See README.md in
+// the view_compiler directory for more information.
+public class DexBuilderTest {
+  static ClassLoader loadDexFile(String filename) throws Exception {
+    return new PathClassLoader("/data/local/tmp/dex-builder-test/" + filename,
+        ClassLoader.getSystemClassLoader());
+  }
+
+  public void hello() {}
+
+  @Test
+  public void loadTrivialDex() throws Exception {
+    ClassLoader loader = loadDexFile("trivial.dex");
+    loader.loadClass("android.startop.test.testcases.Trivial");
+  }
+
+  @Test
+  public void return5() throws Exception {
+    ClassLoader loader = loadDexFile("simple.dex");
+    Class clazz = loader.loadClass("android.startop.test.testcases.SimpleTests");
+    Method method = clazz.getMethod("return5");
+    Assert.assertEquals(5, method.invoke(null));
+  }
+
+  @Test
+  public void returnParam() throws Exception {
+    ClassLoader loader = loadDexFile("simple.dex");
+    Class clazz = loader.loadClass("android.startop.test.testcases.SimpleTests");
+    Method method = clazz.getMethod("returnParam", int.class);
+    Assert.assertEquals(5, method.invoke(null, 5));
+    Assert.assertEquals(42, method.invoke(null, 42));
+  }
+
+  @Test
+  public void returnStringLength() throws Exception {
+    ClassLoader loader = loadDexFile("simple.dex");
+    Class clazz = loader.loadClass("android.startop.test.testcases.SimpleTests");
+    Method method = clazz.getMethod("returnStringLength", String.class);
+    Assert.assertEquals(13, method.invoke(null, "Hello, World!"));
+  }
+}