| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package org.chromium.base.test.util; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.io.OutputStreamWriter; |
| import java.io.Reader; |
| import java.io.Writer; |
| import java.util.Arrays; |
| |
| /** |
| * Utility class for dealing with files for test. |
| */ |
| public class TestFileUtil { |
| public static void createNewHtmlFile(String name, String title, String body) |
| throws IOException { |
| File file = new File(name); |
| if (!file.createNewFile()) { |
| throw new IOException("File \"" + name + "\" already exists"); |
| } |
| |
| Writer writer = null; |
| try { |
| writer = new OutputStreamWriter(new FileOutputStream(file), "UTF-8"); |
| writer.write("<html><meta charset=\"UTF-8\" />" + |
| "<head><title>" + title + "</title></head>" + |
| "<body>" + |
| (body != null ? body : "") + |
| "</body>" + |
| "</html>"); |
| } finally { |
| if (writer != null) { |
| writer.close(); |
| } |
| } |
| } |
| |
| public static void deleteFile(String name) { |
| File file = new File(name); |
| file.delete(); |
| } |
| |
| /** |
| * @param fileName the file to read in. |
| * @param sizeLimit cap on the file size: will throw an exception if exceeded |
| * @return Array of chars read from the file |
| * @throws FileNotFoundException file does not exceed |
| * @throws IOException error encountered accessing the file |
| */ |
| public static char[] readUtf8File(String fileName, int sizeLimit) throws |
| FileNotFoundException, IOException { |
| Reader reader = null; |
| try { |
| File f = new File(fileName); |
| if (f.length() > sizeLimit) { |
| throw new IOException("File " + fileName + " length " + f.length() + |
| " exceeds limit " + sizeLimit); |
| } |
| char[] buffer = new char[(int) f.length()]; |
| reader = new InputStreamReader(new FileInputStream(f), "UTF-8"); |
| int charsRead = reader.read(buffer); |
| // Debug check that we've exhausted the input stream (will fail e.g. if the |
| // file grew after we inspected its length). |
| assert !reader.ready(); |
| return charsRead < buffer.length ? Arrays.copyOfRange(buffer, 0, charsRead) : buffer; |
| } finally { |
| if (reader != null) reader.close(); |
| } |
| } |
| } |
