1 files changed, 191 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/android/ziputils/ViewTest.java b/src/test/java/com/google/devtools/build/android/ziputils/ViewTest.java
new file mode 100644
index 0000000000..8eeabbab90
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/android/ziputils/ViewTest.java
@@ -0,0 +1,191 @@
+// Copyright 2015 Google Inc. 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.ziputils;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.fail;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+
+/**
+ * Unit tests for {@link View}.
+ */
+@RunWith(JUnit4.class)
+public class ViewTest {
+
+  private static final FakeFileSystem fileSystem = new FakeFileSystem();
+
+  @Test
+  public void testView() {
+    // View takes ownership of constructor argument!
+    // Subclasses are responsible for slicing, when needed.
+    ByteBuffer buffer = ByteBuffer.allocate(100);
+    TestView instance = new TestView(buffer);
+    buffer.putInt(12345678);
+    int fromBuf = buffer.getInt(0);
+    int fromView = instance.getInt(0);
+    assertEquals("must assume buffer ownership", fromBuf, fromView);
+    int posBuf = buffer.position();
+    int posView = instance.buffer.position();
+    assertEquals("must assume buffer ownership", posBuf, posView);
+  }
+
+  @Test
+  public void testAt() {
+    long fileOffset = 0L;
+    ByteBuffer buffer = ByteBuffer.allocate(100);
+    TestView instance = new TestView(buffer);
+    View<TestView> result = instance.at(fileOffset);
+    assertSame("didn't return this", instance, result);
+
+    long resultValue = instance.fileOffset();
+    assertEquals("didn't return set value", fileOffset, resultValue);
+  }
+
+  @Test
+  public void testFileOffset() {
+    ByteBuffer buffer = ByteBuffer.allocate(100);
+    TestView instance = new TestView(buffer);
+    long expResult = -1L;
+    long result = instance.fileOffset();
+    assertEquals("default file offset should be -1", expResult, result);
+  }
+
+  @Test
+  public void testFinish() {
+    ByteBuffer buffer = ByteBuffer.allocate(100);
+    TestView instance = new TestView(buffer);
+    int limit = instance.buffer.limit();
+    int pos = instance.buffer.position();
+    assertEquals("initial limit", 100, limit);
+    assertEquals("initial position", 0, pos);
+    instance.putInt(1234);
+    limit = instance.buffer.limit();
+    pos = instance.buffer.position();
+    assertEquals("limit unchanged", 100, limit);
+    assertEquals("position advanced", 4, pos);
+    instance.buffer.flip();
+    int finishedLimit = instance.buffer.limit();
+    int finishedPos = instance.buffer.position();
+    assertEquals("must set limit to position", pos, finishedLimit);
+    assertEquals("must set position to 0", 0, finishedPos);
+  }
+
+  @Test
+  public void testWriteTo() throws Exception {
+    FileChannel file = fileSystem.getOutputChannel("hello", false);
+    byte[] bytes = "hello world".getBytes(UTF_8);
+    ByteBuffer buffer = ByteBuffer.wrap(bytes);
+    TestView instance = new TestView(buffer);
+    int expResult = bytes.length;
+    instance.buffer.rewind();
+    int result = file.write(instance.buffer);
+    file.close();
+    assertEquals("incorrect number of bytes written", expResult, result);
+    byte[] bytesWritten = fileSystem.toByteArray("hello");
+    Assert.assertArrayEquals("incorrect bytes written", bytes, bytesWritten);
+  }
+
+  @Test
+  public void testGetBytes() {
+    int off = 3;
+    int len = 5;
+    byte[] bytes = "hello world".getBytes(UTF_8);
+    ByteBuffer buffer = ByteBuffer.wrap(bytes);
+    TestView instance = new TestView(buffer);
+    byte[] expResult = "lo wo".getBytes(UTF_8);
+    byte[] result = instance.getBytes(off, len);
+    assertArrayEquals("incorrect bytes returned", expResult, result);
+    try {
+      instance.getBytes(bytes.length - len + 1, len);
+      fail("expected Exception");
+    } catch (IndexOutOfBoundsException ex) {
+      // expected
+    }
+    try {
+      instance.getBytes(-1, len);
+      fail("expected Exception");
+    } catch (IndexOutOfBoundsException ex) {
+      // expected
+    }
+  }
+
+  @Test
+  public void testGetString() {
+    int off = 6;
+    int len = 5;
+    byte[] bytes = "hello world".getBytes(UTF_8);
+    ByteBuffer buffer = ByteBuffer.wrap(bytes);
+    TestView instance = new TestView(buffer);
+    String expResult = "world";
+    String result = instance.getString(off, len);
+    assertEquals("didn't return this", expResult, result);
+    try {
+      instance.getString(off + 1, len);
+      fail("expected Exception");
+    } catch (IndexOutOfBoundsException ex) {
+      // expected
+    }
+    try {
+      instance.getString(-1, len);
+      fail("expected Exception");
+    } catch (IndexOutOfBoundsException ex) {
+      // expected
+    }
+  }
+
+  @Test
+  public void testByteOrder() {
+    byte[] bytes = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
+    TestView instance = new TestView(ByteBuffer.wrap(bytes));
+    int expValue = 0x08070605;
+    int value = instance.getInt(4);
+    assertEquals("Byte order incorrect", expValue, value);
+  }
+
+  static class TestView extends View<TestView> {
+    TestView(ByteBuffer buffer) {
+      super(buffer);
+    }
+
+    // Will advance buffer position
+    public void putInt(int value) {
+      buffer.putInt(value);
+    }
+
+    // Will advance buffer position
+    public int getInt() {
+      return buffer.getInt();
+    }
+
+    // will not advance buffer position
+    public void putInt(int index, int value) {
+      buffer.putInt(index, value);
+    }
+
+    // will not advance buffer position
+    public int getInt(int index) {
+      return buffer.getInt(index);
+    }
+  }
+}