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/*
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* Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.nashorn.internal.test.framework;
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import java.io.BufferedReader;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileReader;
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import java.io.IOException;
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import java.io.PrintStream;
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import java.io.Reader;
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/**
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* Simple utilities to deal with build-dir, read/dump files etc.
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*/
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public abstract class TestHelper {
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public static final String TEST_ROOT = "test";
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public static final String BUILD_ROOT = "build/test";
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public static final String TEST_PREFIX = TEST_ROOT + File.separator;
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private TestHelper() {
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// empty
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}
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protected static File makeBuildDir(final File testFile) {
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final File buildDir = getBuildDir(testFile);
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if (!new File(BUILD_ROOT).exists()) {
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throw new IllegalArgumentException("no " + BUILD_ROOT + " directory in " + new File(".").getAbsolutePath());
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}
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buildDir.mkdirs();
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return buildDir;
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}
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protected static File getBuildDir(final File testFile) {
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if (!testFile.getPath().startsWith(TEST_PREFIX)) {
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throw new IllegalArgumentException("test file path not a relative pathname");
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}
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final File buildDir = new File(BUILD_ROOT + File.separator + testFile.getParent().substring(TEST_PREFIX.length()));
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return buildDir;
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}
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// return the first line of the given file
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protected static String firstLine(final File file) throws IOException {
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return content(file, true);
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}
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// return the full content of the file as a String
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protected static String fullContent(final File file) throws IOException {
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return content(file, false);
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}
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private static String content(final File file, final boolean firstLine) throws IOException {
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final ByteArrayOutputStream bos = new ByteArrayOutputStream();
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final PrintStream ps = new PrintStream(bos);
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dumpFile(ps, file);
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final String contents = bos.toString();
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if (! firstLine) {
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return contents;
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}
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// else return only the first line, stripping the trailing cr, lf or cr+lf,
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// if present
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final int cr = contents.indexOf('\r');
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if (cr > 0) {
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return contents.substring(0, cr);
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}
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final int lf = contents.indexOf('\n');
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if (lf > 0) {
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return contents.substring(0, lf);
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}
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return contents;
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}
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// dump the content of given reader on standard output
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protected static void dumpFile(final Reader rdr) throws IOException {
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dumpFile(System.out, rdr);
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}
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// dump the content of given reader on given output stream
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protected static void dumpFile(final PrintStream output, final Reader rdr) throws IOException {
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try (BufferedReader reader = new BufferedReader(rdr)) {
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while (true) {
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final String line = reader.readLine();
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if (line == null) {
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break;
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}
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output.println(line);
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}
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}
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}
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// dump the content of given file on standard output
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protected static void dumpFile(final File file) throws IOException {
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dumpFile(System.out, file);
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}
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// dump the content of given file on given output stream
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protected static void dumpFile(final PrintStream output, final File file) throws IOException {
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try (Reader rdr = new FileReader(file); BufferedReader reader = new BufferedReader(rdr)) {
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while (true) {
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final String line = reader.readLine();
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if (line == null) {
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break;
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}
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output.println(line);
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}
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}
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}
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}
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