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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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.devtools.build.android.dexer;
import static com.google.common.truth.Truth.assertThat;
import static com.google.common.util.concurrent.MoreExecutors.newDirectExecutorService;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.when;
import com.android.dex.Dex;
import com.android.dx.command.dexer.DxContext;
import com.android.dx.dex.DexOptions;
import com.android.dx.dex.cf.CfOptions;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.google.common.collect.ImmutableList;
import com.google.common.io.ByteStreams;
import com.google.devtools.build.android.dexer.Dexing.DexingKey;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Collections;
import java.util.Enumeration;
import java.util.concurrent.Future;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
/** Tests for {@link DexConversionEnqueuer}. */
@RunWith(JUnit4.class)
public class DexConversionEnqueuerTest {
private static final long FILE_TIME = 12345678987654321L;
@Mock private ZipFile zip;
private DexConversionEnqueuer stuffer;
private final Cache<DexingKey, byte[]> cache = CacheBuilder.newBuilder().build();
@Before
public void setUp() {
MockitoAnnotations.initMocks(this);
makeStuffer();
}
private void makeStuffer() {
stuffer =
new DexConversionEnqueuer(
zip,
newDirectExecutorService(),
new DexConverter(new Dexing(new DxContext(), new DexOptions(), new CfOptions())),
cache);
}
/** Makes sure there's always a future returning {@code null} at the end. */
@After
public void assertEndOfStreamMarker() throws Exception {
Future<ZipEntryContent> f = stuffer.getFiles().remove();
assertThat(f.isDone()).isTrue();
assertThat(f.get()).isNull();
assertThat(stuffer.getFiles()).isEmpty();
}
@Test
public void testEmptyZip() throws Exception {
mockEntries();
stuffer.call();
}
@Test
public void testDirectory_copyEmptyBuffer() throws Exception {
ZipEntry entry = newZipEntry("dir/", 0);
assertThat(entry.isDirectory()).isTrue(); // test sanity
mockEntries(entry);
stuffer.call();
Future<ZipEntryContent> f = stuffer.getFiles().remove();
assertThat(f.isDone()).isTrue();
assertThat(f.get().getEntry()).isEqualTo(entry);
assertThat(f.get().getContent()).isEmpty();
assertThat(entry.getCompressedSize()).isEqualTo(0);
}
@Test
public void testFile_copyContent() throws Exception {
byte[] content = "Hello".getBytes(UTF_8);
ZipEntry entry = newZipEntry("file", content.length);
mockEntries(entry);
when(zip.getInputStream(entry)).thenReturn(new ByteArrayInputStream(content));
stuffer.call();
Future<ZipEntryContent> f = stuffer.getFiles().remove();
assertThat(f.isDone()).isTrue();
assertThat(f.get().getEntry()).isEqualTo(entry);
assertThat(f.get().getContent()).isEqualTo(content);
assertThat(cache.size()).isEqualTo(0); // don't cache resource files
assertThat(entry.getCompressedSize()).isEqualTo(-1); // we don't know how the file will compress
}
@Test
public void testClass_convertToDex() throws Exception {
testConvertClassToDex();
}
@Test
public void testClass_cachedResult() throws Exception {
byte[] dexcode = testConvertClassToDex();
makeStuffer();
String filename = getClass().getName().replace('.', '/') + ".class";
mockClassFile(filename);
stuffer.call();
Future<ZipEntryContent> f = stuffer.getFiles().remove();
assertThat(f.isDone()).isTrue();
assertThat(f.get().getEntry().getName()).isEqualTo(filename + ".dex");
assertThat(f.get().getEntry().getTime()).isEqualTo(FILE_TIME);
assertThat(f.get().getContent()).isSameAs(dexcode);
}
private byte[] testConvertClassToDex() throws Exception {
String filename = getClass().getName().replace('.', '/') + ".class";
byte[] bytecode = mockClassFile(filename);
stuffer.call();
Future<ZipEntryContent> f = stuffer.getFiles().remove();
assertThat(f.isDone()).isTrue();
assertThat(f.get().getEntry().getName()).isEqualTo(filename + ".dex");
assertThat(f.get().getEntry().getTime()).isEqualTo(FILE_TIME);
assertThat(f.get().getEntry().getSize()).isEqualTo(-1);
assertThat(f.get().getEntry().getCompressedSize()).isEqualTo(-1);
byte[] dexcode = f.get().getContent();
Dex dex = new Dex(dexcode);
assertThat(dex.classDefs()).hasSize(1);
assertThat(cache.getIfPresent(DexingKey.create(false, false, bytecode))).isSameAs(dexcode);
assertThat(cache.getIfPresent(DexingKey.create(true, false, bytecode))).isNull();
assertThat(cache.getIfPresent(DexingKey.create(false, true, bytecode))).isNull();
assertThat(cache.getIfPresent(DexingKey.create(true, true, bytecode))).isNull();
return dexcode;
}
private byte[] mockClassFile(String filename) throws IOException {
byte[] bytecode = ByteStreams.toByteArray(
Thread.currentThread().getContextClassLoader().getResourceAsStream(filename));
ZipEntry entry = newZipEntry(filename, bytecode.length);
assertThat(entry.isDirectory()).isFalse(); // test sanity
mockEntries(entry);
when(zip.getInputStream(entry)).thenReturn(new ByteArrayInputStream(bytecode));
return bytecode;
}
@Test
public void testException_stillEnqueueEndOfStreamMarker() throws Exception {
when(zip.entries()).thenThrow(new IllegalStateException("test"));
try {
stuffer.call();
fail("IllegalStateException expected");
} catch (IllegalStateException expected) {
}
// assertEndOfStreamMarker() makes sure the end-of-stream marker is there
}
private ZipEntry newZipEntry(String name, long size) {
ZipEntry result = new ZipEntry(name);
// Class under test needs sizing information so we need to set it for the test. These values
// are always set when reading zip entries from an existing zip file.
result.setSize(size);
result.setCompressedSize(size);
result.setTime(FILE_TIME);
return result;
}
// thenReturn expects a generic type that uses the unknown ? extends ZipEntry "returned"
// by entries(). Since we can't come up with an unknown type, use raw type to make this typecheck.
// Note this is safe: actual entries() callers expect ZipEntries and they get them.
@SuppressWarnings({"rawtypes", "unchecked"})
private void mockEntries(ZipEntry... entries) {
when(zip.entries())
.thenReturn((Enumeration) Collections.enumeration(ImmutableList.copyOf(entries)));
}
}
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