HttpURITest.java

//
// ========================================================================
// Copyright (c) 1995-2021 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//

package org.eclipse.jetty.http;

import java.util.Arrays;
import java.util.EnumSet;
import java.util.stream.Stream;

import org.eclipse.jetty.http.HttpURI.Ambiguous;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.nullValue;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;

public class HttpURITest
{
    @Test
    public void testBuilder()
    {
        HttpURI uri = HttpURI.build()
            .scheme("http")
            .user("user:password")
            .host("host")
            .port(8888)
            .path("/ignored/../p%61th;ignored/info")
            .param("param")
            .query("query=value")
            .asImmutable();

        assertThat(uri.getScheme(), is("http"));
        assertThat(uri.getUser(), is("user:password"));
        assertThat(uri.getHost(), is("host"));
        assertThat(uri.getPort(), is(8888));
        assertThat(uri.getPath(), is("/ignored/../p%61th;ignored/info;param"));
        assertThat(uri.getDecodedPath(), is("/path/info"));
        assertThat(uri.getParam(), is("param"));
        assertThat(uri.getQuery(), is("query=value"));
        assertThat(uri.getAuthority(), is("host:8888"));
        assertThat(uri.toString(), is("http://user:password@host:8888/ignored/../p%61th;ignored/info;param?query=value"));

        uri = HttpURI.build(uri)
            .scheme("https")
            .user(null)
            .authority("[::1]:8080")
            .decodedPath("/some encoded/evening")
            .param("id=12345")
            .query(null)
            .asImmutable();

        assertThat(uri.getScheme(), is("https"));
        assertThat(uri.getUser(), nullValue());
        assertThat(uri.getHost(), is("[::1]"));
        assertThat(uri.getPort(), is(8080));
        assertThat(uri.getPath(), is("/some%20encoded/evening;id=12345"));
        assertThat(uri.getDecodedPath(), is("/some encoded/evening"));
        assertThat(uri.getParam(), is("id=12345"));
        assertThat(uri.getQuery(), nullValue());
        assertThat(uri.getAuthority(), is("[::1]:8080"));
        assertThat(uri.toString(), is("https://[::1]:8080/some%20encoded/evening;id=12345"));
    }

    @Test
    public void testExample()
    {
        HttpURI uri = HttpURI.from("http://user:password@host:8888/ignored/../p%61th;ignored/info;param?query=value#fragment");

        assertThat(uri.getScheme(), is("http"));
        assertThat(uri.getUser(), is("user:password"));
        assertThat(uri.getHost(), is("host"));
        assertThat(uri.getPort(), is(8888));
        assertThat(uri.getPath(), is("/ignored/../p%61th;ignored/info;param"));
        assertThat(uri.getDecodedPath(), is("/path/info"));
        assertThat(uri.getParam(), is("param"));
        assertThat(uri.getQuery(), is("query=value"));
        assertThat(uri.getFragment(), is("fragment"));
        assertThat(uri.getAuthority(), is("host:8888"));
    }

    @Test
    public void testInvalidAddress()
    {
        assertInvalidURI("http://[ffff::1:8080/", "Invalid URL; no closing ']' -- should throw exception");
        assertInvalidURI("**", "only '*', not '**'");
        assertInvalidURI("*/", "only '*', not '*/'");
    }

    private void assertInvalidURI(String invalidURI, String message)
    {
        try
        {
            HttpURI.build(invalidURI);
            fail(message);
        }
        catch (IllegalArgumentException e)
        {
            assertTrue(true);
        }
    }

    @Test
    public void testParse()
    {
        HttpURI.Mutable builder = HttpURI.build();
        HttpURI uri;

        builder.uri("*");
        uri = builder.asImmutable();
        assertThat(uri.getHost(), nullValue());
        assertThat(uri.getPath(), is("*"));

        builder.uri("/foo/bar");
        uri = builder.asImmutable();
        assertThat(uri.getHost(), nullValue());
        assertThat(uri.getPath(), is("/foo/bar"));

        builder.uri("//foo/bar");
        uri = builder.asImmutable();
        assertThat(uri.getHost(), is("foo"));
        assertThat(uri.getPath(), is("/bar"));

        builder.uri("http://foo/bar");
        uri = builder.asImmutable();
        assertThat(uri.getHost(), is("foo"));
        assertThat(uri.getPath(), is("/bar"));
    }

    @Test
    public void testParseRequestTarget()
    {
        HttpURI uri;

        uri = HttpURI.from("GET", "*");
        assertThat(uri.getHost(), nullValue());
        assertThat(uri.getPath(), is("*"));

        uri = HttpURI.from("GET", "/foo/bar");
        assertThat(uri.getHost(), nullValue());
        assertThat(uri.getPath(), is("/foo/bar"));

        uri = HttpURI.from("GET", "//foo/bar");
        assertThat(uri.getHost(), nullValue());
        assertThat(uri.getPath(), is("//foo/bar"));

        uri = HttpURI.from("GET", "http://foo/bar");
        assertThat(uri.getHost(), is("foo"));
        assertThat(uri.getPath(), is("/bar"));
    }

    @Test
    public void testAt()
    {
        HttpURI uri = HttpURI.from("/@foo/bar");
        assertEquals("/@foo/bar", uri.getPath());
    }

    @Test
    public void testParams()
    {
        HttpURI uri = HttpURI.from("/foo/bar");
        assertEquals("/foo/bar", uri.getPath());
        assertEquals("/foo/bar", uri.getDecodedPath());
        assertNull(uri.getParam());

        uri = HttpURI.from("/foo/bar;jsessionid=12345");
        assertEquals("/foo/bar;jsessionid=12345", uri.getPath());
        assertEquals("/foo/bar", uri.getDecodedPath());
        assertEquals("jsessionid=12345", uri.getParam());

        uri = HttpURI.from("/foo;abc=123/bar;jsessionid=12345");
        assertEquals("/foo;abc=123/bar;jsessionid=12345", uri.getPath());
        assertEquals("/foo/bar", uri.getDecodedPath());
        assertEquals("jsessionid=12345", uri.getParam());

        uri = HttpURI.from("/foo;abc=123/bar;jsessionid=12345?name=value");
        assertEquals("/foo;abc=123/bar;jsessionid=12345", uri.getPath());
        assertEquals("/foo/bar", uri.getDecodedPath());
        assertEquals("jsessionid=12345", uri.getParam());

        uri = HttpURI.from("/foo;abc=123/bar;jsessionid=12345#target");
        assertEquals("/foo;abc=123/bar;jsessionid=12345", uri.getPath());
        assertEquals("/foo/bar", uri.getDecodedPath());
        assertEquals("jsessionid=12345", uri.getParam());
    }

    @Test
    public void testMutableURIBuilder()
    {
        HttpURI.Mutable builder = HttpURI.build("/foo/bar");
        HttpURI uri = builder.asImmutable();
        assertEquals("/foo/bar", uri.toString());
        assertEquals("/foo/bar", uri.getPath());
        assertEquals("/foo/bar", uri.getDecodedPath());

        uri = builder.scheme("http").asImmutable();
        assertEquals("http:/foo/bar", uri.toString());
        assertEquals("/foo/bar", uri.getPath());
        assertEquals("/foo/bar", uri.getDecodedPath());

        uri = builder.authority("host", 0).asImmutable();
        assertEquals("http://host/foo/bar", uri.toString());
        assertEquals("/foo/bar", uri.getPath());
        assertEquals("/foo/bar", uri.getDecodedPath());

        uri = builder.authority("host", 8888).asImmutable();
        assertEquals("http://host:8888/foo/bar", uri.toString());
        assertEquals("/foo/bar", uri.getPath());
        assertEquals("/foo/bar", uri.getDecodedPath());

        uri = builder.pathQuery("/f%30%30;p0/bar;p1;p2").asImmutable();
        assertEquals("http://host:8888/f%30%30;p0/bar;p1;p2", uri.toString());
        assertEquals("/f%30%30;p0/bar;p1;p2", uri.getPath());
        assertEquals("/f00/bar", uri.getDecodedPath());
        assertEquals("p2", uri.getParam());
        assertNull(uri.getQuery());

        uri = builder.pathQuery("/f%30%30;p0/bar;p1;p2?name=value").asImmutable();
        assertEquals("http://host:8888/f%30%30;p0/bar;p1;p2?name=value", uri.toString());
        assertEquals("/f%30%30;p0/bar;p1;p2", uri.getPath());
        assertEquals("/f00/bar", uri.getDecodedPath());
        assertEquals("p2", uri.getParam());
        assertEquals("name=value", uri.getQuery());

        uri = builder.pathQuery("/f%30%30;p0/bar;p1;p2").asImmutable();
        assertEquals("http://host:8888/f%30%30;p0/bar;p1;p2", uri.toString());
        assertEquals("/f%30%30;p0/bar;p1;p2", uri.getPath());
        assertEquals("/f00/bar", uri.getDecodedPath());
        assertEquals("p2", uri.getParam());
        assertNull(uri.getQuery());

        uri = builder.query("other=123456").asImmutable();
        assertEquals("http://host:8888/f%30%30;p0/bar;p1;p2?other=123456", uri.toString());
        assertEquals("/f%30%30;p0/bar;p1;p2", uri.getPath());
        assertEquals("/f00/bar", uri.getDecodedPath());
        assertEquals("p2", uri.getParam());
        assertEquals("other=123456", uri.getQuery());
    }

    @Test
    public void testSchemeAndOrAuthority()
    {
        HttpURI.Mutable builder = HttpURI.build("/path/info");
        HttpURI uri = builder.asImmutable();
        assertEquals("/path/info", uri.toString());

        uri = builder.authority("host", 0).asImmutable();
        assertEquals("//host/path/info", uri.toString());

        uri = builder.authority("host", 8888).asImmutable();
        assertEquals("//host:8888/path/info", uri.toString());

        uri = builder.scheme("http").asImmutable();
        assertEquals("http://host:8888/path/info", uri.toString());

        uri = builder.authority(null, 0).asImmutable();
        assertEquals("http:/path/info", uri.toString());
    }

    @Test
    public void testBasicAuthCredentials()
    {
        HttpURI uri = HttpURI.from("http://user:password@example.com:8888/blah");
        assertEquals("http://user:password@example.com:8888/blah", uri.toString());
        assertEquals(uri.getAuthority(), "example.com:8888");
        assertEquals(uri.getUser(), "user:password");
    }

    @Test
    public void testCanonicalDecoded()
    {
        HttpURI uri = HttpURI.from("/path/.info");
        assertEquals("/path/.info", uri.getDecodedPath());

        uri = HttpURI.from("/path/./info");
        assertEquals("/path/info", uri.getDecodedPath());

        uri = HttpURI.from("/path/../info");
        assertEquals("/info", uri.getDecodedPath());

        uri = HttpURI.from("/./path/info.");
        assertEquals("/path/info.", uri.getDecodedPath());

        uri = HttpURI.from("./path/info/.");
        assertEquals("path/info/", uri.getDecodedPath());

        uri = HttpURI.from("http://host/path/.info");
        assertEquals("/path/.info", uri.getDecodedPath());

        uri = HttpURI.from("http://host/path/./info");
        assertEquals("/path/info", uri.getDecodedPath());

        uri = HttpURI.from("http://host/path/../info");
        assertEquals("/info", uri.getDecodedPath());

        uri = HttpURI.from("http://host/./path/info.");
        assertEquals("/path/info.", uri.getDecodedPath());

        uri = HttpURI.from("http:./path/info/.");
        assertEquals("path/info/", uri.getDecodedPath());
    }

    public static Stream<Arguments> decodePathTests()
    {
        return Arrays.stream(new Object[][]
            {
                // Simple path example
                {"http://host/path/info", "/path/info", EnumSet.noneOf(Ambiguous.class)},
                {"//host/path/info", "/path/info", EnumSet.noneOf(Ambiguous.class)},
                {"/path/info", "/path/info", EnumSet.noneOf(Ambiguous.class)},

                // legal non ambiguous relative paths
                {"http://host/../path/info", null, EnumSet.noneOf(Ambiguous.class)},
                {"http://host/path/../info", "/info", EnumSet.noneOf(Ambiguous.class)},
                {"http://host/path/./info", "/path/info", EnumSet.noneOf(Ambiguous.class)},
                {"//host/path/../info", "/info", EnumSet.noneOf(Ambiguous.class)},
                {"//host/path/./info", "/path/info", EnumSet.noneOf(Ambiguous.class)},
                {"/path/../info", "/info", EnumSet.noneOf(Ambiguous.class)},
                {"/path/./info", "/path/info", EnumSet.noneOf(Ambiguous.class)},
                {"path/../info", "info", EnumSet.noneOf(Ambiguous.class)},
                {"path/./info", "path/info", EnumSet.noneOf(Ambiguous.class)},

                // illegal paths
                {"//host/../path/info", null, EnumSet.noneOf(Ambiguous.class)},
                {"/../path/info", null, EnumSet.noneOf(Ambiguous.class)},
                {"../path/info", null, EnumSet.noneOf(Ambiguous.class)},
                {"/path/%XX/info", null, EnumSet.noneOf(Ambiguous.class)},
                {"/path/%2/F/info", null, EnumSet.noneOf(Ambiguous.class)},

                // ambiguous dot encodings
                {"scheme://host/path/%2e/info", "/path/./info", EnumSet.of(Ambiguous.SEGMENT)},
                {"scheme:/path/%2e/info", "/path/./info", EnumSet.of(Ambiguous.SEGMENT)},
                {"/path/%2e/info", "/path/./info", EnumSet.of(Ambiguous.SEGMENT)},
                {"path/%2e/info/", "path/./info/", EnumSet.of(Ambiguous.SEGMENT)},
                {"/path/%2e%2e/info", "/path/../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"/path/%2e%2e;/info", "/path/../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"/path/%2e%2e;param/info", "/path/../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"/path/%2e%2e;param;other/info;other", "/path/../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e/info", "./info", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e%2e/info", "../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e%2e;/info", "../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e", ".", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e.", "..", EnumSet.of(Ambiguous.SEGMENT)},
                {".%2e", "..", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e%2e", "..", EnumSet.of(Ambiguous.SEGMENT)},

                // empty segment treated as ambiguous
                {"/foo//bar", "/foo//bar", EnumSet.of(Ambiguous.EMPTY)},
                {"/foo//../bar", "/foo/bar", EnumSet.of(Ambiguous.EMPTY)},
                {"/foo///../../../bar", "/bar", EnumSet.of(Ambiguous.EMPTY)},
                {"/foo/./../bar", "/bar", EnumSet.noneOf(Ambiguous.class)},
                {"/foo//./bar", "/foo//bar", EnumSet.of(Ambiguous.EMPTY)},
                {"foo/bar", "foo/bar", EnumSet.noneOf(Ambiguous.class)},
                {"foo;/bar", "foo/bar", EnumSet.noneOf(Ambiguous.class)},
                {";/bar", "/bar", EnumSet.of(Ambiguous.EMPTY)},
                {";?n=v", "", EnumSet.of(Ambiguous.EMPTY)},
                {"?n=v", "", EnumSet.noneOf(Ambiguous.class)},
                {"#n=v", "", EnumSet.noneOf(Ambiguous.class)},
                {"", "", EnumSet.noneOf(Ambiguous.class)},
                {"http:/foo", "/foo", EnumSet.noneOf(Ambiguous.class)},

                // ambiguous parameter inclusions
                {"/path/.;/info", "/path/./info", EnumSet.of(Ambiguous.PARAM)},
                {"/path/.;param/info", "/path/./info", EnumSet.of(Ambiguous.PARAM)},
                {"/path/..;/info", "/path/../info", EnumSet.of(Ambiguous.PARAM)},
                {"/path/..;param/info", "/path/../info", EnumSet.of(Ambiguous.PARAM)},
                {".;/info", "./info", EnumSet.of(Ambiguous.PARAM)},
                {".;param/info", "./info", EnumSet.of(Ambiguous.PARAM)},
                {"..;/info", "../info", EnumSet.of(Ambiguous.PARAM)},
                {"..;param/info", "../info", EnumSet.of(Ambiguous.PARAM)},

                // ambiguous segment separators
                {"/path/%2f/info", "/path///info", EnumSet.of(Ambiguous.SEPARATOR)},
                {"%2f/info", "//info", EnumSet.of(Ambiguous.SEPARATOR)},
                {"%2F/info", "//info", EnumSet.of(Ambiguous.SEPARATOR)},
                {"/path/%2f../info", "/path//../info", EnumSet.of(Ambiguous.SEPARATOR)},

                // ambiguous encoding
                {"/path/%25/info", "/path/%/info", EnumSet.of(Ambiguous.ENCODING)},
                {"%25/info", "%/info", EnumSet.of(Ambiguous.ENCODING)},
                {"/path/%25../info", "/path/%../info", EnumSet.of(Ambiguous.ENCODING)},

                // combinations
                {"/path/%2f/..;/info", "/path///../info", EnumSet.of(Ambiguous.SEPARATOR, Ambiguous.PARAM)},
                {"/path/%2f/..;/%2e/info", "/path///.././info", EnumSet.of(Ambiguous.SEPARATOR, Ambiguous.PARAM, Ambiguous.SEGMENT)},

                // Non ascii characters
                // @checkstyle-disable-check : AvoidEscapedUnicodeCharactersCheck
                {"http://localhost:9000/x\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32", "/x\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32", EnumSet.noneOf(Ambiguous.class)},
                {"http://localhost:9000/\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32", "/\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32\uD83C\uDF32", EnumSet.noneOf(Ambiguous.class)},
                // @checkstyle-enable-check : AvoidEscapedUnicodeCharactersCheck
            }).map(Arguments::of);
    }

    @ParameterizedTest
    @MethodSource("decodePathTests")
    public void testDecodedPath(String input, String decodedPath, EnumSet<Ambiguous> expected)
    {
        try
        {
            HttpURI uri = HttpURI.from(input);
            assertThat(uri.getDecodedPath(), is(decodedPath));
            assertThat(uri.isAmbiguous(), is(!expected.isEmpty()));
            assertThat(uri.hasAmbiguousSegment(), is(expected.contains(Ambiguous.SEGMENT)));
            assertThat(uri.hasAmbiguousSeparator(), is(expected.contains(Ambiguous.SEPARATOR)));
            assertThat(uri.hasAmbiguousParameter(), is(expected.contains(Ambiguous.PARAM)));
            assertThat(uri.hasAmbiguousEncoding(), is(expected.contains(Ambiguous.ENCODING)));
        }
        catch (Exception e)
        {
            assertThat(decodedPath, nullValue());
        }
    }

    public static Stream<Arguments> testPathQueryTests()
    {
        return Arrays.stream(new Object[][]
            {
                // Simple path example
                {"/path/info", "/path/info", EnumSet.noneOf(Ambiguous.class)},

                // legal non ambiguous relative paths
                {"/path/../info", "/info", EnumSet.noneOf(Ambiguous.class)},
                {"/path/./info", "/path/info", EnumSet.noneOf(Ambiguous.class)},
                {"path/../info", "info", EnumSet.noneOf(Ambiguous.class)},
                {"path/./info", "path/info", EnumSet.noneOf(Ambiguous.class)},

                // illegal paths
                {"/../path/info", null, null},
                {"../path/info", null, null},
                {"/path/%XX/info", null, null},
                {"/path/%2/F/info", null, null},

                // ambiguous dot encodings
                {"/path/%2e/info", "/path/./info", EnumSet.of(Ambiguous.SEGMENT)},
                {"path/%2e/info/", "path/./info/", EnumSet.of(Ambiguous.SEGMENT)},
                {"/path/%2e%2e/info", "/path/../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"/path/%2e%2e;/info", "/path/../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"/path/%2e%2e;param/info", "/path/../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"/path/%2e%2e;param;other/info;other", "/path/../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e/info", "./info", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e%2e/info", "../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e%2e;/info", "../info", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e", ".", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e.", "..", EnumSet.of(Ambiguous.SEGMENT)},
                {".%2e", "..", EnumSet.of(Ambiguous.SEGMENT)},
                {"%2e%2e", "..", EnumSet.of(Ambiguous.SEGMENT)},

                // empty segment treated as ambiguous
                {"/", "/", EnumSet.noneOf(Ambiguous.class)},
                {"/#", "/", EnumSet.noneOf(Ambiguous.class)},
                {"/path", "/path", EnumSet.noneOf(Ambiguous.class)},
                {"/path/", "/path/", EnumSet.noneOf(Ambiguous.class)},
                {"//", "//", EnumSet.of(Ambiguous.EMPTY)},
                {"/foo//", "/foo//", EnumSet.of(Ambiguous.EMPTY)},
                {"/foo//bar", "/foo//bar", EnumSet.of(Ambiguous.EMPTY)},
                {"//foo/bar", "//foo/bar", EnumSet.of(Ambiguous.EMPTY)},
                {"/foo?bar", "/foo", EnumSet.noneOf(Ambiguous.class)},
                {"/foo#bar", "/foo", EnumSet.noneOf(Ambiguous.class)},
                {"/foo;bar", "/foo", EnumSet.noneOf(Ambiguous.class)},
                {"/foo/?bar", "/foo/", EnumSet.noneOf(Ambiguous.class)},
                {"/foo/#bar", "/foo/", EnumSet.noneOf(Ambiguous.class)},
                {"/foo/;param", "/foo/", EnumSet.noneOf(Ambiguous.class)},
                {"/foo/;param/bar", "/foo//bar", EnumSet.of(Ambiguous.EMPTY)},
                {"/foo//bar", "/foo//bar", EnumSet.of(Ambiguous.EMPTY)},
                {"/foo//bar//", "/foo//bar//", EnumSet.of(Ambiguous.EMPTY)},
                {"//foo//bar//", "//foo//bar//", EnumSet.of(Ambiguous.EMPTY)},
                {"/foo//../bar", "/foo/bar", EnumSet.of(Ambiguous.EMPTY)},
                {"/foo///../../../bar", "/bar", EnumSet.of(Ambiguous.EMPTY)},
                {"/foo/./../bar", "/bar", EnumSet.noneOf(Ambiguous.class)},
                {"/foo//./bar", "/foo//bar", EnumSet.of(Ambiguous.EMPTY)},
                {"foo/bar", "foo/bar", EnumSet.noneOf(Ambiguous.class)},
                {"foo;/bar", "foo/bar", EnumSet.noneOf(Ambiguous.class)},
                {";/bar", "/bar", EnumSet.of(Ambiguous.EMPTY)},
                {";?n=v", "", EnumSet.of(Ambiguous.EMPTY)},
                {"?n=v", "", EnumSet.noneOf(Ambiguous.class)},
                {"#n=v", "", EnumSet.noneOf(Ambiguous.class)},
                {"", "", EnumSet.noneOf(Ambiguous.class)},

                // ambiguous parameter inclusions
                {"/path/.;/info", "/path/./info", EnumSet.of(Ambiguous.PARAM)},
                {"/path/.;param/info", "/path/./info", EnumSet.of(Ambiguous.PARAM)},
                {"/path/..;/info", "/path/../info", EnumSet.of(Ambiguous.PARAM)},
                {"/path/..;param/info", "/path/../info", EnumSet.of(Ambiguous.PARAM)},
                {".;/info", "./info", EnumSet.of(Ambiguous.PARAM)},
                {".;param/info", "./info", EnumSet.of(Ambiguous.PARAM)},
                {"..;/info", "../info", EnumSet.of(Ambiguous.PARAM)},
                {"..;param/info", "../info", EnumSet.of(Ambiguous.PARAM)},

                // ambiguous segment separators
                {"/path/%2f/info", "/path///info", EnumSet.of(Ambiguous.SEPARATOR)},
                {"%2f/info", "//info", EnumSet.of(Ambiguous.SEPARATOR)},
                {"%2F/info", "//info", EnumSet.of(Ambiguous.SEPARATOR)},
                {"/path/%2f../info", "/path//../info", EnumSet.of(Ambiguous.SEPARATOR)},

                // ambiguous encoding
                {"/path/%25/info", "/path/%/info", EnumSet.of(Ambiguous.ENCODING)},
                {"%25/info", "%/info", EnumSet.of(Ambiguous.ENCODING)},
                {"/path/%25../info", "/path/%../info", EnumSet.of(Ambiguous.ENCODING)},

                // combinations
                {"/path/%2f/..;/info", "/path///../info", EnumSet.of(Ambiguous.SEPARATOR, Ambiguous.PARAM)},
                {"/path/%2f/..;/%2e/info", "/path///.././info", EnumSet.of(Ambiguous.SEPARATOR, Ambiguous.PARAM, Ambiguous.SEGMENT)},
                {"/path/%2f/%25/..;/%2e//info", "/path///%/.././/info", EnumSet.of(Ambiguous.SEPARATOR, Ambiguous.PARAM, Ambiguous.SEGMENT, Ambiguous.ENCODING, Ambiguous.EMPTY)},
            }).map(Arguments::of);
    }

    @ParameterizedTest
    @MethodSource("testPathQueryTests")
    public void testPathQuery(String input, String decodedPath, EnumSet<Ambiguous> expected)
    {
        // If expected is null then it is a bad URI and should throw.
        if (expected == null)
        {
            assertThrows(Throwable.class, () -> HttpURI.build().pathQuery(input));
            return;
        }

        HttpURI uri = HttpURI.build().pathQuery(input);
        assertThat(uri.getDecodedPath(), is(decodedPath));
        assertThat(uri.isAmbiguous(), is(!expected.isEmpty()));
        assertThat(uri.hasAmbiguousEmptySegment(), is(expected.contains(Ambiguous.EMPTY)));
        assertThat(uri.hasAmbiguousSegment(), is(expected.contains(Ambiguous.SEGMENT)));
        assertThat(uri.hasAmbiguousSeparator(), is(expected.contains(Ambiguous.SEPARATOR)));
        assertThat(uri.hasAmbiguousParameter(), is(expected.contains(Ambiguous.PARAM)));
        assertThat(uri.hasAmbiguousEncoding(), is(expected.contains(Ambiguous.ENCODING)));
    }
}