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// Copyright 2015 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.ziputils;
import static com.google.common.truth.Truth.assertWithMessage;
import static com.google.devtools.build.android.ziputils.DirectoryEntry.CENTIM;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit tests for {@link CentralDirectory}. */
@RunWith(JUnit4.class)
public class CentralDirectoryTest {
/**
* Test of viewOf method, of class CentralDirectory.
*/
@Test
public void testViewOf() {
ByteBuffer buffer = ByteBuffer.allocate(100).order(ByteOrder.LITTLE_ENDIAN);
for (int i = 0; i < 100; i++) {
buffer.put((byte) i);
}
buffer.position(20);
buffer.limit(90);
CentralDirectory view = CentralDirectory.viewOf(buffer);
int expPos = 0;
int expLimit = 90;
// expect the buffer to have been reset to 0 (CentralDirectory does NOT slice).
assertWithMessage("View not at position 0").that(view.buffer.position()).isEqualTo(expPos);
assertWithMessage("Buffer not at position 0").that(buffer.position()).isEqualTo(expPos);
assertWithMessage("Buffer limit changed").that(view.buffer.limit()).isEqualTo(expLimit);
assertWithMessage("Buffer limit changed").that(buffer.limit()).isEqualTo(expLimit);
}
/**
* Test of parse method, of class CentralDirectory.
*/
@Test
public void testParse() {
// First fill it with some entries
ByteBuffer inputBuffer = ByteBuffer.allocate(10000).order(ByteOrder.LITTLE_ENDIAN);
String comment = null;
byte[] extra = null;
String filename = "pkg/0.txt";
DirectoryEntry entry = DirectoryEntry.view(inputBuffer, filename, extra , comment);
int expSize = entry.getSize();
comment = "";
extra = new byte[]{};
for (int i = 1; i < 20; i++) {
filename = "pkg/" + i + ".txt";
entry = DirectoryEntry.view(inputBuffer, filename, extra , comment);
expSize += entry.getSize();
extra = new byte[extra.length + 1];
comment = comment + "," + i;
}
// Parse the entries.
CentralDirectory cdir = CentralDirectory.viewOf(inputBuffer).at(0).parse();
assertWithMessage("Count").that(cdir.getCount()).isEqualTo(20);
assertWithMessage("Position after parse").that(cdir.buffer.position()).isEqualTo(expSize);
assertWithMessage("Limit after parse").that(cdir.buffer.limit()).isEqualTo(10000);
cdir.buffer.flip();
assertWithMessage("Position after finish").that(cdir.buffer.position()).isEqualTo(0);
assertWithMessage("Limit after finish").that(cdir.buffer.limit()).isEqualTo(expSize);
}
/**
* Test of nextEntry method, of class CentralDirectory.
*/
@Test
public void testNextEntry() {
ByteBuffer outputBuffer = ByteBuffer.allocate(10000).order(ByteOrder.LITTLE_ENDIAN);
CentralDirectory cdir = CentralDirectory.viewOf(outputBuffer);
String comment = null;
byte[] extra = null;
String filename = "pkg/0.txt";
DirectoryEntry entry = DirectoryEntry.allocate(filename, extra , comment);
cdir.nextEntry(entry).set(CENTIM, 0);
int expSize = entry.getSize();
comment = "";
extra = new byte[]{};
for (int i = 1; i < 20; i++) {
filename = "pkg/" + i + ".txt";
entry = DirectoryEntry.allocate(filename, extra , comment);
cdir.nextEntry(entry).set(CENTIM, 0);
int size = entry.getSize();
expSize += size;
extra = new byte[extra.length + 1];
comment = comment + "," + i;
}
assertWithMessage("Count").that(cdir.getCount()).isEqualTo(20);
assertWithMessage("Position after build").that(cdir.buffer.position()).isEqualTo(expSize);
assertWithMessage("Limit after build").that(cdir.buffer.limit()).isEqualTo(10000);
cdir.buffer.flip();
assertWithMessage("Position after finish build").that(cdir.buffer.position()).isEqualTo(0);
assertWithMessage("Limit after finish build").that(cdir.buffer.limit()).isEqualTo(expSize);
// now try to parse the directory we just created.
cdir.at(0).parse();
assertWithMessage("Count").that(cdir.getCount()).isEqualTo(20);
assertWithMessage("Position after re-parse").that(cdir.buffer.position()).isEqualTo(expSize);
assertWithMessage("Limit after re-parse").that(cdir.buffer.limit()).isEqualTo(expSize);
cdir.buffer.flip();
assertWithMessage("Position after finish parse").that(cdir.buffer.position()).isEqualTo(0);
assertWithMessage("Limit after finish parse").that(cdir.buffer.limit()).isEqualTo(expSize);
}
}
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