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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.LocalFileHeader.LOCCRC;
import static com.google.devtools.build.android.ziputils.LocalFileHeader.LOCFLG;
import static com.google.devtools.build.android.ziputils.LocalFileHeader.LOCHOW;
import static com.google.devtools.build.android.ziputils.LocalFileHeader.LOCLEN;
import static com.google.devtools.build.android.ziputils.LocalFileHeader.LOCSIG;
import static com.google.devtools.build.android.ziputils.LocalFileHeader.LOCSIZ;
import static com.google.devtools.build.android.ziputils.LocalFileHeader.LOCTIM;
import static com.google.devtools.build.android.ziputils.LocalFileHeader.LOCVER;
import static java.nio.charset.StandardCharsets.UTF_8;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.zip.ZipInputStream;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit tests for {@link LocalFileHeader}. */
@RunWith(JUnit4.class)
public class LocalFileHeaderTest {
@Test
public void testViewOf() {
ByteBuffer buffer = ByteBuffer.allocate(100).order(ByteOrder.LITTLE_ENDIAN);
for (int i = 0; i < 100; i++) {
buffer.put((byte) i);
}
int offset = 20;
int filenameLength = 10;
int extraLength = 25;
int marker = LocalFileHeader.SIGNATURE;
buffer.putShort(offset + ZipInputStream.LOCNAM, (short) filenameLength); // filename length
buffer.putShort(offset + ZipInputStream.LOCEXT, (short) extraLength); // extra data length
buffer.putInt(offset, marker); // need to zero filename length to have predictable size
buffer.position(offset);
LocalFileHeader view = LocalFileHeader.viewOf(buffer);
int expMark = (int) ZipInputStream.LOCSIG;
int expSize = ZipInputStream.LOCHDR + filenameLength + extraLength; // fixed + comment
int expPos = 0;
assertWithMessage("not based at current position").that(view.get(LOCSIG)).isEqualTo(expMark);
assertWithMessage("Not slice with position 0").that(view.buffer.position()).isEqualTo(expPos);
assertWithMessage("Not sized with comment").that(view.getSize()).isEqualTo(expSize);
assertWithMessage("Not limited to size").that(view.buffer.limit()).isEqualTo(expSize);
}
@Test
public void testView_String_byteArr() {
String filename = "pkg/foo.class";
byte[] extraData = { 1, 2, 3, 4, 5, 6, 7, 8};
int expSize = ZipInputStream.LOCHDR + filename.getBytes(UTF_8).length
+ extraData.length;
int expPos = 0;
LocalFileHeader view = LocalFileHeader.allocate(filename, extraData);
assertWithMessage("Incorrect filename").that(view.getFilename()).isEqualTo(filename);
assertWithMessage("Incorrect extra data").that(view.getExtraData()).isEqualTo(extraData);
assertWithMessage("Not at position 0").that(view.buffer.position()).isEqualTo(expPos);
assertWithMessage("Not sized correctly").that(view.getSize()).isEqualTo(expSize);
assertWithMessage("Not limited to size").that(view.buffer.limit()).isEqualTo(expSize);
}
@Test
public void testView_3Args() {
ByteBuffer buffer = ByteBuffer.allocate(100).order(ByteOrder.LITTLE_ENDIAN);
for (int i = 0; i < 100; i++) {
buffer.put((byte) i);
}
int offset = 20;
buffer.position(offset);
String filename = "pkg/foo.class";
int expMark = LocalFileHeader.SIGNATURE;
int expSize = ZipInputStream.LOCHDR + filename.getBytes(UTF_8).length;
int expPos = 0;
LocalFileHeader view = LocalFileHeader.view(buffer, filename, null);
assertWithMessage("not based at current position").that(view.get(LOCSIG)).isEqualTo(expMark);
assertWithMessage("Not slice with position 0").that(view.buffer.position()).isEqualTo(expPos);
assertWithMessage("Not sized with filename").that(view.getSize()).isEqualTo(expSize);
assertWithMessage("Not limited to size").that(view.buffer.limit()).isEqualTo(expSize);
assertWithMessage("Incorrect filename").that(view.getFilename()).isEqualTo(filename);
}
@Test
public void testCopy() {
ByteBuffer buffer = ByteBuffer.allocate(100).order(ByteOrder.LITTLE_ENDIAN);
LocalFileHeader view = LocalFileHeader.allocate("pkg/foo.class", null);
view.copy(buffer);
int expSize = view.getSize();
assertWithMessage("buffer not advanced as expected").that(buffer.position()).isEqualTo(expSize);
buffer.position(0);
LocalFileHeader clone = LocalFileHeader.viewOf(buffer);
assertWithMessage("Fail to copy mark").that(view.get(LOCSIG)).isEqualTo(view.get(LOCSIG));
assertWithMessage("Fail to copy comment")
.that(clone.getFilename())
.isEqualTo(view.getFilename());
}
@Test
public void testWithAndGetMethods() {
int crc = 0x12345678;
int compressed = 0x357f1d5;
int uncompressed = 0x74813159;
short flags = 0x7a61;
short method = 0x3b29;
int time = 0x12c673e1;
short version = 0x1234;
LocalFileHeader view = LocalFileHeader.allocate("pkg/foo.class", null)
.set(LOCCRC, crc)
.set(LOCSIZ, compressed)
.set(LOCLEN, uncompressed)
.set(LOCFLG, flags)
.set(LOCHOW, method)
.set(LOCTIM, time)
.set(LOCVER, version);
assertWithMessage("CRC").that(view.get(LOCCRC)).isEqualTo(crc);
assertWithMessage("Compressed size").that(view.get(LOCSIZ)).isEqualTo(compressed);
assertWithMessage("Uncompressed size").that(view.get(LOCLEN)).isEqualTo(uncompressed);
assertWithMessage("Flags").that(view.get(LOCFLG)).isEqualTo(flags);
assertWithMessage("Method").that(view.get(LOCHOW)).isEqualTo(method);
assertWithMessage("Modified time").that(view.get(LOCTIM)).isEqualTo(time);
assertWithMessage("Version needed").that(view.get(LOCVER)).isEqualTo(version);
}
}
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