1 files changed, 123 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/android/dexer/DexFileAggregatorTest.java b/src/test/java/com/google/devtools/build/android/dexer/DexFileAggregatorTest.java
new file mode 100644
index 0000000000..7bc9ded10d
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+++ b/src/test/java/com/google/devtools/build/android/dexer/DexFileAggregatorTest.java
@@ -0,0 +1,123 @@
+// 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 org.mockito.Matchers.any;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import com.android.dex.Dex;
+import com.android.dx.dex.DexOptions;
+import com.android.dx.dex.cf.CfOptions;
+import com.android.dx.dex.file.DexFile;
+import com.google.common.collect.Iterables;
+import com.google.common.io.ByteStreams;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.zip.ZipEntry;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+/** Tests for {@link DexFileAggregator}. */
+@RunWith(JUnit4.class)
+public class DexFileAggregatorTest {
+
+  /** Standard .dex file limit on methods and fields. */
+  private static final int DEX_LIMIT = 265 * 265;
+  private static final int WASTE = 1;
+
+  @Mock private DexFileArchive dest;
+  @Captor private ArgumentCaptor<Dex> written;
+
+  private Dex dex;
+
+  @Before
+  public void setUp() throws IOException {
+    dex = DexFiles.toDex(convertClass(DexFileAggregatorTest.class));
+    MockitoAnnotations.initMocks(this);
+  }
+
+  @Test
+  public void testClose_emptyWritesNothing() throws Exception {
+    DexFileAggregator dexer =
+        new DexFileAggregator(dest, MultidexStrategy.MINIMAL, DEX_LIMIT, WASTE);
+    dexer.close();
+    verify(dest, times(0)).addFile(any(ZipEntry.class), any(Dex.class));
+  }
+
+  @Test
+  public void testAddAndClose_singleInputWritesThatInput() throws Exception {
+    DexFileAggregator dexer = new DexFileAggregator(dest, MultidexStrategy.MINIMAL, 0, WASTE);
+    dexer.add(dex);
+    dexer.close();
+    verify(dest).addFile(any(ZipEntry.class), eq(dex));
+  }
+
+  @Test
+  public void testMultidex_underLimitWritesOneShard() throws Exception {
+    DexFileAggregator dexer =
+        new DexFileAggregator(dest, MultidexStrategy.BEST_EFFORT, DEX_LIMIT, WASTE);
+    Dex dex2 = DexFiles.toDex(convertClass(ByteStreams.class));
+    dexer.add(dex);
+    dexer.add(dex2);
+    verify(dest, times(0)).addFile(any(ZipEntry.class), any(Dex.class));
+    dexer.close();
+    verify(dest).addFile(any(ZipEntry.class), written.capture());
+    assertThat(Iterables.size(written.getValue().classDefs())).isEqualTo(2);
+  }
+
+  @Test
+  public void testMultidex_overLimitWritesSecondShard() throws Exception {
+    DexFileAggregator dexer = new DexFileAggregator(dest, MultidexStrategy.BEST_EFFORT,
+        2 /* dex has more than 2 methods and fields */, WASTE);
+    Dex dex2 = DexFiles.toDex(convertClass(ByteStreams.class));
+    dexer.add(dex);   // classFile is already over limit but we take anything in empty shard
+    dexer.add(dex2);  // this should start a new shard
+    // Make sure there was one file written and that file is dex
+    verify(dest).addFile(any(ZipEntry.class), written.capture());
+    assertThat(written.getValue()).isSameAs(dex);
+    dexer.close();
+    verify(dest).addFile(any(ZipEntry.class), eq(dex2));
+  }
+
+  @Test
+  public void testMonodex_alwaysWritesSingleShard() throws Exception {
+    DexFileAggregator dexer = new DexFileAggregator(dest, MultidexStrategy.OFF,
+        2 /* dex has more than 2 methods and fields */, WASTE);
+    Dex dex2 = DexFiles.toDex(convertClass(ByteStreams.class));
+    dexer.add(dex);
+    dexer.add(dex2);
+    verify(dest, times(0)).addFile(any(ZipEntry.class), any(Dex.class));
+    dexer.close();
+    verify(dest).addFile(any(ZipEntry.class), written.capture());
+    assertThat(Iterables.size(written.getValue().classDefs())).isEqualTo(2);
+  }
+
+  private static DexFile convertClass(Class<?> clazz) throws IOException {
+    String path = clazz.getName().replace('.', '/') + ".class";
+    try (InputStream in =
+        Thread.currentThread().getContextClassLoader().getResourceAsStream(path)) {
+      return new DexConverter(new Dexing(new DexOptions(), new CfOptions()))
+          .toDexFile(ByteStreams.toByteArray(in), path);
+    }
+  }
+}