| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.druid.java.util.common; |
| |
| import org.junit.Assert; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.ExpectedException; |
| import org.junit.rules.TemporaryFolder; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.nio.file.Files; |
| |
| public class FileUtilsTest |
| { |
| @Rule |
| public TemporaryFolder folder = new TemporaryFolder(); |
| |
| @Rule |
| public ExpectedException expectedException = ExpectedException.none(); |
| |
| @Test |
| public void testMap() throws IOException |
| { |
| File dataFile = folder.newFile("data"); |
| long buffersMemoryBefore = BufferUtils.totalMemoryUsedByDirectAndMappedBuffers(); |
| try (RandomAccessFile raf = new RandomAccessFile(dataFile, "rw")) { |
| raf.write(42); |
| raf.setLength(1 << 20); // 1 MB |
| } |
| try (MappedByteBufferHandler mappedByteBufferHandler = FileUtils.map(dataFile)) { |
| Assert.assertEquals(42, mappedByteBufferHandler.get().get(0)); |
| } |
| long buffersMemoryAfter = BufferUtils.totalMemoryUsedByDirectAndMappedBuffers(); |
| Assert.assertEquals(buffersMemoryBefore, buffersMemoryAfter); |
| } |
| |
| @Test |
| public void testWriteAtomically() throws IOException |
| { |
| final File tmpDir = folder.newFolder(); |
| final File tmpFile = new File(tmpDir, "file1"); |
| FileUtils.writeAtomically(tmpFile, out -> { |
| out.write(StringUtils.toUtf8("foo")); |
| return null; |
| }); |
| Assert.assertEquals("foo", StringUtils.fromUtf8(Files.readAllBytes(tmpFile.toPath()))); |
| |
| // Try writing again, throw error partway through. |
| try { |
| FileUtils.writeAtomically(tmpFile, out -> { |
| out.write(StringUtils.toUtf8("bar")); |
| out.flush(); |
| throw new ISE("OMG!"); |
| }); |
| } |
| catch (IllegalStateException e) { |
| // Suppress |
| } |
| Assert.assertEquals("foo", StringUtils.fromUtf8(Files.readAllBytes(tmpFile.toPath()))); |
| |
| FileUtils.writeAtomically(tmpFile, out -> { |
| out.write(StringUtils.toUtf8("baz")); |
| return null; |
| }); |
| Assert.assertEquals("baz", StringUtils.fromUtf8(Files.readAllBytes(tmpFile.toPath()))); |
| } |
| |
| @Test |
| public void testCreateTempDir() throws IOException |
| { |
| final File tempDir = FileUtils.createTempDir(); |
| try { |
| Assert.assertEquals( |
| new File(System.getProperty("java.io.tmpdir")).toPath(), |
| tempDir.getParentFile().toPath() |
| ); |
| } |
| finally { |
| Files.delete(tempDir.toPath()); |
| } |
| } |
| |
| @Test |
| public void testCreateTempDirNonexistentBase() |
| { |
| final String oldJavaTmpDir = System.getProperty("java.io.tmpdir"); |
| final String nonExistentDir = oldJavaTmpDir + "/nonexistent"; |
| |
| expectedException.expect(IllegalStateException.class); |
| expectedException.expectMessage(StringUtils.format("java.io.tmpdir (%s) does not exist", nonExistentDir)); |
| |
| try { |
| System.setProperty("java.io.tmpdir", nonExistentDir); |
| FileUtils.createTempDir(); |
| } |
| finally { |
| System.setProperty("java.io.tmpdir", oldJavaTmpDir); |
| } |
| } |
| |
| @Test |
| public void testCreateTempDirUnwritableBase() throws IOException |
| { |
| final File baseDir = FileUtils.createTempDir(); |
| try { |
| expectedException.expect(IllegalStateException.class); |
| expectedException.expectMessage("java.io.tmpdir (" + baseDir + ") is not writable"); |
| |
| final String oldJavaTmpDir = System.getProperty("java.io.tmpdir"); |
| try { |
| System.setProperty("java.io.tmpdir", baseDir.getPath()); |
| baseDir.setWritable(false); |
| FileUtils.createTempDir(); |
| } |
| finally { |
| System.setProperty("java.io.tmpdir", oldJavaTmpDir); |
| } |
| } |
| finally { |
| baseDir.setWritable(true); |
| Files.delete(baseDir.toPath()); |
| } |
| } |
| } |