| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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.android.apksig.util; |
| |
| import com.android.apksig.util.DataSourceFromRAFTest.TmpFileCloseable; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.nio.charset.StandardCharsets; |
| import java.nio.file.Files; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** |
| * Tests for the {@link DataSource} returned by |
| * {@link DataSources#asDataSource(RandomAccessFile, long, long)}. |
| */ |
| @RunWith(JUnit4.class) |
| public class DataSourceFromRAFChunkTest extends DataSourceTestBase { |
| |
| @Test |
| public void testFileSizeChangesNotVisible() throws Exception { |
| try (CloseableWithDataSource c = createDataSource("abcdefg")) { |
| DataSource ds = c.getDataSource(); |
| DataSource slice = ds.slice(3, 2); |
| File f = ((TmpFileCloseable) c.getCloseable()).getFile(); |
| assertGetByteBufferEquals("abcdefg", ds, 0, (int) ds.size()); |
| assertGetByteBufferEquals("de", slice, 0, (int) slice.size()); |
| assertFeedEquals("cdefg", ds, 2, 5); |
| assertFeedEquals("e", slice, 1, 1); |
| assertCopyToEquals("cdefg", ds, 2, 5); |
| assertCopyToEquals("e", slice, 1, 1); |
| assertSliceEquals("cdefg", ds, 2, 5); |
| assertSliceEquals("e", slice, 1, 1); |
| try (RandomAccessFile raf = new RandomAccessFile(f, "rw")) { |
| raf.seek(raf.length()); |
| raf.write("hijkl".getBytes(StandardCharsets.UTF_8)); |
| } |
| |
| assertGetByteBufferEquals("abcdefg", ds, 0, (int) ds.size()); |
| assertGetByteBufferEquals("de", slice, 0, (int) slice.size()); |
| assertGetByteBufferThrowsIOOB(ds, 0, (int) ds.size() + 3); |
| assertFeedThrowsIOOB(ds, 0, (int) ds.size() + 3); |
| assertSliceThrowsIOOB(ds, 0, (int) ds.size() + 3); |
| assertCopyToThrowsIOOB(ds, 0, (int) ds.size() + 3); |
| } |
| } |
| |
| @Override |
| protected CloseableWithDataSource createDataSource(byte[] contents) throws IOException { |
| // "01" | contents | "9" |
| byte[] fullContents = new byte[2 + contents.length + 1]; |
| fullContents[0] = '0'; |
| fullContents[1] = '1'; |
| System.arraycopy(contents, 0, fullContents, 2, contents.length); |
| fullContents[fullContents.length - 1] = '9'; |
| |
| File tmp = File.createTempFile(DataSourceFromRAFChunkTest.class.getSimpleName(), ".bin"); |
| RandomAccessFile f = null; |
| try { |
| Files.write(tmp.toPath(), fullContents); |
| f = new RandomAccessFile(tmp, "r"); |
| } finally { |
| if (f == null) { |
| tmp.delete(); |
| } |
| } |
| |
| return CloseableWithDataSource.of( |
| DataSources.asDataSource(f, 2, contents.length), |
| new DataSourceFromRAFTest.TmpFileCloseable(tmp, f)); |
| } |
| } |