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This is a test framework for the JDK 1.8 - Extension to provide matchers based on annotation. - Factory Support

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/**
 * Powerunit - A JDK1.8 test framework
 * Copyright (C) 2014 Mathieu Boretti.
 *
 * This file is part of Powerunit
 *
 * Powerunit is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Powerunit is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Powerunit. If not, see .
 */
package ch.powerunit.extensions.matchers.common;

import static java.util.stream.Collectors.joining;

import java.util.Arrays;

public class CommonUtils {
	private CommonUtils() {
	}

	public static String toJavaSyntax(String unformatted) {
		StringBuilder sb = new StringBuilder();
		sb.append('"');
		for (char c : unformatted.toCharArray()) {
			sb.append(toJavaSyntax(c));
		}
		sb.append('"');
		return sb.toString();
	}

	private static String toJavaSyntax(char ch) {
		switch (ch) {
		case '"':
			return "\\\"";
		case '\n':
			return "\\n";
		case '\r':
			return "\\r";
		case '\t':
			return "\\t";
		default:
			return "" + ch;
		}
	}

	public static String addPrefix(String prefix, String input) {
		return "\n" + Arrays.stream(input.split("\\R")).map(l -> prefix + l).collect(joining("\n")) + "\n";
	}

}