Java tutorial
/** * Copyright (c) 2016 Bunkr * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package test.bunkr.core.streams; import org.bouncycastle.crypto.digests.GeneralDigest; import org.bouncycastle.crypto.digests.SHA1Digest; import org.bunkr.core.utils.IO; import org.bunkr.core.utils.RandomMaker; import org.bunkr.core.exceptions.IntegrityHashError; import org.bunkr.core.fragmented_range.FragmentedRange; import org.bunkr.core.inventory.FileInventoryItem; import org.bunkr.core.streams.input.BlockReaderInputStream; import org.junit.Rule; import org.junit.Test; import org.junit.rules.TemporaryFolder; import java.io.DataOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import static junit.framework.TestCase.fail; import static org.hamcrest.MatcherAssert.assertThat; import static org.hamcrest.core.Is.is; import static org.hamcrest.core.IsEqual.equalTo; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertTrue; /** * Created At: 2015-12-02 */ public class TestBlockReaderInputStream { public static final String content = "abababababababababababababababab" + "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd" + "efefefefefEfefefefefefefefefefef" + "ghghghghghghghghghghghghghghghgh" + "ijijijijijijijiji"; public static final String suffixPad = "xxxxxxxxxxxxxxx"; public static final String badSuffixPad = "yyyyyyyyyyyyyyy"; @Rule public final TemporaryFolder folder = new TemporaryFolder(); public byte[] hashUp(byte[] input) { GeneralDigest d = new SHA1Digest(); d.update(input, 0, input.length); byte[] b = new byte[d.getDigestSize()]; d.doFinal(b, 0); return b; } public File buildFake() throws IOException { File f = folder.newFile(); try (DataOutputStream dos = new DataOutputStream(new FileOutputStream(f))) { dos.write(RandomMaker.get((int) BlockReaderInputStream.DATABLOCKS_START * 8)); dos.write((content + suffixPad).getBytes()); } return f; } @Test public void testBasicReading() throws IOException { File f = buildFake(); FileInventoryItem fakeFile = new FileInventoryItem("fake"); fakeFile.setSizeOnDisk(32 * 4 + 17); fakeFile.setBlocks(new FragmentedRange(0, 5)); fakeFile.setIntegrityHash(this.hashUp((content + suffixPad).getBytes())); BlockReaderInputStream bis = new BlockReaderInputStream(f, 32, fakeFile); String all = IO.readNByteString(bis, 32 * 4 + 17); assertThat(all, is(equalTo(content))); assertTrue(bis.doesHashMatch()); } @Test public void testReadingBadHash() throws IOException { File f = buildFake(); FileInventoryItem fakeFile = new FileInventoryItem("fake"); fakeFile.setSizeOnDisk(32 * 4 + 17); fakeFile.setBlocks(new FragmentedRange(0, 5)); fakeFile.setIntegrityHash(this.hashUp((content + badSuffixPad).getBytes())); BlockReaderInputStream bis = new BlockReaderInputStream(f, 32, fakeFile); try { IO.readNByteString(bis, 32 * 4 + 17); fail("Should have raised integrityhasherror"); } catch (IntegrityHashError ignored) { } assertFalse(bis.doesHashMatch()); } @Test public void testSkip() throws IOException { File f = buildFake(); FileInventoryItem fakeFile = new FileInventoryItem("fake"); fakeFile.setSizeOnDisk(32 * 4 + 17); fakeFile.setBlocks(new FragmentedRange(0, 5)); fakeFile.setIntegrityHash(this.hashUp((content + suffixPad).getBytes())); BlockReaderInputStream bis = new BlockReaderInputStream(f, 32, fakeFile); assertThat(bis.read(), is(equalTo(97))); assertThat(bis.read(), is(equalTo(98))); assertThat(bis.skip(72), is(equalTo(72L))); assertThat(bis.read(), is(equalTo(69))); assertThat(bis.available(), is(equalTo(70))); assertThat(bis.skip(10000000), is(equalTo(70L))); assertThat(bis.skip(1), is(equalTo(-1L))); bis.close(); } @Test public void testRead() throws IOException { File f = buildFake(); FileInventoryItem fakeFile = new FileInventoryItem("fake"); fakeFile.setSizeOnDisk(32 * 4 + 17); fakeFile.setBlocks(new FragmentedRange(0, 5)); fakeFile.setIntegrityHash(this.hashUp((content + suffixPad).getBytes())); BlockReaderInputStream bis = new BlockReaderInputStream(f, 32, fakeFile); assertThat(bis.read(), is(equalTo(97))); assertThat(bis.read(), is(equalTo(98))); byte[] buffer = new byte[200]; assertThat(bis.read(buffer, 0, 72), is(equalTo(72))); assertThat(bis.read(), is(equalTo(69))); assertThat(bis.available(), is(equalTo(70))); assertThat(bis.read(buffer, 0, 100000), is(equalTo(70))); assertThat(bis.read(), is(equalTo(-1))); bis.close(); } @Test public void testEdges() throws IOException { File f = buildFake(); try { FileInventoryItem fakeFile = new FileInventoryItem("fake"); fakeFile.setSizeOnDisk(32 * 10); fakeFile.setBlocks(new FragmentedRange(0, 5)); fakeFile.setIntegrityHash(this.hashUp((content + suffixPad).getBytes())); new BlockReaderInputStream(f, 32, fakeFile); fail("bad datalength"); } catch (IllegalArgumentException ignored) { } FileInventoryItem fakeFile = new FileInventoryItem("fake"); fakeFile.setSizeOnDisk(32 * 4 + 17); fakeFile.setBlocks(new FragmentedRange(0, 5)); BlockReaderInputStream bis = new BlockReaderInputStream(f, 32, fakeFile); assertFalse(bis.markSupported()); } }