/*
 * Copyright (C) 2018, Thomas Wolf <thomas.wolf@paranor.ch>
 * and other copyright owners as documented in the project's IP log.
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 * - Neither the name of the Eclipse Foundation, Inc. nor the
 *   names of its contributors may be used to endorse or promote
 *   products derived from this software without specific prior
 *   written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.eclipse.jgit.internal.transport.sshd.proxy;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.junit.Test;

public class HttpParserTest {

	private static final String STATUS_LINE = "HTTP/1.1. 407 Authentication required";

	@Test
	public void testEmpty() throws Exception {
		String[] lines = { STATUS_LINE };
		List<AuthenticationChallenge> challenges = HttpParser
				.getAuthenticationHeaders(Arrays.asList(lines),
						"WWW-Authenticate:");
		assertTrue("No challenges expected", challenges.isEmpty());
	}

	@Test
	public void testRFC7235Example() throws Exception {
		// The example from RFC 7235, sec. 4.1, slightly modified ("kind"
		// argument with whitespace around '=')
		String[] lines = { STATUS_LINE,
				"WWW-Authenticate: Newauth realm=\"apps\", type=1  , kind = \t2 ",
				"   \t  title=\"Login to \\\"apps\\\"\", Basic realm=\"simple\"" };
		List<AuthenticationChallenge> challenges = HttpParser
				.getAuthenticationHeaders(Arrays.asList(lines),
						"WWW-Authenticate:");
		assertEquals("Unexpected number of challenges", 2, challenges.size());
		assertNull("No token expected", challenges.get(0).getToken());
		assertNull("No token expected", challenges.get(1).getToken());
		assertEquals("Unexpected mechanism", "Newauth",
				challenges.get(0).getMechanism());
		assertEquals("Unexpected mechanism", "Basic",
				challenges.get(1).getMechanism());
		Map<String, String> expectedArguments = new LinkedHashMap<>();
		expectedArguments.put("realm", "apps");
		expectedArguments.put("type", "1");
		expectedArguments.put("kind", "2");
		expectedArguments.put("title", "Login to \"apps\"");
		assertEquals("Unexpected arguments", expectedArguments,
				challenges.get(0).getArguments());
		expectedArguments.clear();
		expectedArguments.put("realm", "simple");
		assertEquals("Unexpected arguments", expectedArguments,
				challenges.get(1).getArguments());
	}

	@Test
	public void testMultipleHeaders() {
		String[] lines = { STATUS_LINE,
				"Server: Apache",
				"WWW-Authenticate: Newauth realm=\"apps\", type=1  , kind = \t2 ",
				"   \t  title=\"Login to \\\"apps\\\"\", Basic realm=\"simple\"",
				"Content-Type: text/plain",
				"WWW-Authenticate: Other 0123456789===  , YetAnother, ",
				"WWW-Authenticate: Negotiate   ",
				"WWW-Authenticate: Negotiate a87421000492aa874209af8bc028" };
		List<AuthenticationChallenge> challenges = HttpParser
				.getAuthenticationHeaders(Arrays.asList(lines),
						"WWW-Authenticate:");
		assertEquals("Unexpected number of challenges", 6, challenges.size());
		assertEquals("Mismatched challenge", "Other",
				challenges.get(2).getMechanism());
		assertEquals("Token expected", "0123456789===",
				challenges.get(2).getToken());
		assertEquals("Mismatched challenge", "YetAnother",
				challenges.get(3).getMechanism());
		assertNull("No token expected", challenges.get(3).getToken());
		assertTrue("No arguments expected",
				challenges.get(3).getArguments().isEmpty());
		assertEquals("Mismatched challenge", "Negotiate",
				challenges.get(4).getMechanism());
		assertNull("No token expected", challenges.get(4).getToken());
		assertEquals("Mismatched challenge", "Negotiate",
				challenges.get(5).getMechanism());
		assertEquals("Token expected", "a87421000492aa874209af8bc028",
				challenges.get(5).getToken());
	}

	@Test
	public void testStopOnEmptyLine() {
		String[] lines = { STATUS_LINE, "Server: Apache",
				"WWW-Authenticate: Newauth realm=\"apps\", type=1  , kind = \t2 ",
				"   \t  title=\"Login to \\\"apps\\\"\", Basic realm=\"simple\"",
				"Content-Type: text/plain",
				"WWW-Authenticate: Other 0123456789===", "",
				// Not headers anymore; this would be the body
				"WWW-Authenticate: Negotiate   ",
				"WWW-Authenticate: Negotiate a87421000492aa874209af8bc028" };
		List<AuthenticationChallenge> challenges = HttpParser
				.getAuthenticationHeaders(Arrays.asList(lines),
						"WWW-Authenticate:");
		assertEquals("Unexpected number of challenges", 3, challenges.size());
	}
}