path: root/tests/phpunit/includes/IPTest.php

<?php
/**
 * Tests for IP validity functions.
 *
 * Ported from /t/inc/IP.t by avar.
 *
 * @group IP
 * @todo Test methods in this call should be split into a method and a
 * dataprovider.
 */

class IPTest extends MediaWikiTestCase {
	/**
	 *  not sure it should be tested with boolean false. hashar 20100924
	 * @covers IP::isIPAddress
	 */
	public function testisIPAddress() {
		$this->assertFalse( IP::isIPAddress( false ), 'Boolean false is not an IP' );
		$this->assertFalse( IP::isIPAddress( true ), 'Boolean true is not an IP' );
		$this->assertFalse( IP::isIPAddress( "" ), 'Empty string is not an IP' );
		$this->assertFalse( IP::isIPAddress( 'abc' ), 'Garbage IP string' );
		$this->assertFalse( IP::isIPAddress( ':' ), 'Single ":" is not an IP' );
		$this->assertFalse( IP::isIPAddress( '2001:0DB8::A:1::1' ), 'IPv6 with a double :: occurrence' );
		$this->assertFalse( IP::isIPAddress( '2001:0DB8::A:1::' ), 'IPv6 with a double :: occurrence, last at end' );
		$this->assertFalse( IP::isIPAddress( '::2001:0DB8::5:1' ), 'IPv6 with a double :: occurrence, firt at beginning' );
		$this->assertFalse( IP::isIPAddress( '124.24.52' ), 'IPv4 not enough quads' );
		$this->assertFalse( IP::isIPAddress( '24.324.52.13' ), 'IPv4 out of range' );
		$this->assertFalse( IP::isIPAddress( '.24.52.13' ), 'IPv4 starts with period' );
		$this->assertFalse( IP::isIPAddress( 'fc:100:300' ), 'IPv6 with only 3 words' );

		$this->assertTrue( IP::isIPAddress( '::' ), 'RFC 4291 IPv6 Unspecified Address' );
		$this->assertTrue( IP::isIPAddress( '::1' ), 'RFC 4291 IPv6 Loopback Address' );
		$this->assertTrue( IP::isIPAddress( '74.24.52.13/20', 'IPv4 range' ) );
		$this->assertTrue( IP::isIPAddress( 'fc:100:a:d:1:e:ac:0/24' ), 'IPv6 range' );
		$this->assertTrue( IP::isIPAddress( 'fc::100:a:d:1:e:ac/96' ), 'IPv6 range with "::"' );

		$validIPs = array( 'fc:100::', 'fc:100:a:d:1:e:ac::', 'fc::100', '::fc:100:a:d:1:e:ac',
			'::fc', 'fc::100:a:d:1:e:ac', 'fc:100:a:d:1:e:ac:0', '124.24.52.13', '1.24.52.13' );
		foreach ( $validIPs as $ip ) {
			$this->assertTrue( IP::isIPAddress( $ip ), "$ip is a valid IP address" );
		}
	}

	/**
	 * @covers IP::isIPv6
	 */
	public function testisIPv6() {
		$this->assertFalse( IP::isIPv6( ':fc:100::' ), 'IPv6 starting with lone ":"' );
		$this->assertFalse( IP::isIPv6( 'fc:100:::' ), 'IPv6 ending with a ":::"' );
		$this->assertFalse( IP::isIPv6( 'fc:300' ), 'IPv6 with only 2 words' );
		$this->assertFalse( IP::isIPv6( 'fc:100:300' ), 'IPv6 with only 3 words' );

		$this->assertTrue( IP::isIPv6( 'fc:100::' ) );
		$this->assertTrue( IP::isIPv6( 'fc:100:a::' ) );
		$this->assertTrue( IP::isIPv6( 'fc:100:a:d::' ) );
		$this->assertTrue( IP::isIPv6( 'fc:100:a:d:1::' ) );
		$this->assertTrue( IP::isIPv6( 'fc:100:a:d:1:e::' ) );
		$this->assertTrue( IP::isIPv6( 'fc:100:a:d:1:e:ac::' ) );

		$this->assertFalse( IP::isIPv6( 'fc:100:a:d:1:e:ac:0::' ), 'IPv6 with 8 words ending with "::"' );
		$this->assertFalse( IP::isIPv6( 'fc:100:a:d:1:e:ac:0:1::' ), 'IPv6 with 9 words ending with "::"' );

		$this->assertFalse( IP::isIPv6( ':::' ) );
		$this->assertFalse( IP::isIPv6( '::0:' ), 'IPv6 ending in a lone ":"' );

		$this->assertTrue( IP::isIPv6( '::' ), 'IPv6 zero address' );
		$this->assertTrue( IP::isIPv6( '::0' ) );
		$this->assertTrue( IP::isIPv6( '::fc' ) );
		$this->assertTrue( IP::isIPv6( '::fc:100' ) );
		$this->assertTrue( IP::isIPv6( '::fc:100:a' ) );
		$this->assertTrue( IP::isIPv6( '::fc:100:a:d' ) );
		$this->assertTrue( IP::isIPv6( '::fc:100:a:d:1' ) );
		$this->assertTrue( IP::isIPv6( '::fc:100:a:d:1:e' ) );
		$this->assertTrue( IP::isIPv6( '::fc:100:a:d:1:e:ac' ) );

		$this->assertFalse( IP::isIPv6( '::fc:100:a:d:1:e:ac:0' ), 'IPv6 with "::" and 8 words' );
		$this->assertFalse( IP::isIPv6( '::fc:100:a:d:1:e:ac:0:1' ), 'IPv6 with 9 words' );

		$this->assertFalse( IP::isIPv6( ':fc::100' ), 'IPv6 starting with lone ":"' );
		$this->assertFalse( IP::isIPv6( 'fc::100:' ), 'IPv6 ending with lone ":"' );
		$this->assertFalse( IP::isIPv6( 'fc:::100' ), 'IPv6 with ":::" in the middle' );

		$this->assertTrue( IP::isIPv6( 'fc::100' ), 'IPv6 with "::" and 2 words' );
		$this->assertTrue( IP::isIPv6( 'fc::100:a' ), 'IPv6 with "::" and 3 words' );
		$this->assertTrue( IP::isIPv6( 'fc::100:a:d', 'IPv6 with "::" and 4 words' ) );
		$this->assertTrue( IP::isIPv6( 'fc::100:a:d:1' ), 'IPv6 with "::" and 5 words' );
		$this->assertTrue( IP::isIPv6( 'fc::100:a:d:1:e' ), 'IPv6 with "::" and 6 words' );
		$this->assertTrue( IP::isIPv6( 'fc::100:a:d:1:e:ac' ), 'IPv6 with "::" and 7 words' );
		$this->assertTrue( IP::isIPv6( '2001::df' ), 'IPv6 with "::" and 2 words' );
		$this->assertTrue( IP::isIPv6( '2001:5c0:1400:a::df' ), 'IPv6 with "::" and 5 words' );
		$this->assertTrue( IP::isIPv6( '2001:5c0:1400:a::df:2' ), 'IPv6 with "::" and 6 words' );

		$this->assertFalse( IP::isIPv6( 'fc::100:a:d:1:e:ac:0' ), 'IPv6 with "::" and 8 words' );
		$this->assertFalse( IP::isIPv6( 'fc::100:a:d:1:e:ac:0:1' ), 'IPv6 with 9 words' );

		$this->assertTrue( IP::isIPv6( 'fc:100:a:d:1:e:ac:0' ) );
	}

	/**
	 * @covers IP::isIPv4
	 */
	public function testisIPv4() {
		$this->assertFalse( IP::isIPv4( false ), 'Boolean false is not an IP' );
		$this->assertFalse( IP::isIPv4( true ), 'Boolean true is not an IP' );
		$this->assertFalse( IP::isIPv4( "" ), 'Empty string is not an IP' );
		$this->assertFalse( IP::isIPv4( 'abc' ) );
		$this->assertFalse( IP::isIPv4( ':' ) );
		$this->assertFalse( IP::isIPv4( '124.24.52' ), 'IPv4 not enough quads' );
		$this->assertFalse( IP::isIPv4( '24.324.52.13' ), 'IPv4 out of range' );
		$this->assertFalse( IP::isIPv4( '.24.52.13' ), 'IPv4 starts with period' );

		$this->assertTrue( IP::isIPv4( '124.24.52.13' ) );
		$this->assertTrue( IP::isIPv4( '1.24.52.13' ) );
		$this->assertTrue( IP::isIPv4( '74.24.52.13/20', 'IPv4 range' ) );
	}

	/**
	 * @covers IP::isValid
	 */
	public function testValidIPs() {
		foreach ( range( 0, 255 ) as $i ) {
			$a = sprintf( "%03d", $i );
			$b = sprintf( "%02d", $i );
			$c = sprintf( "%01d", $i );
			foreach ( array_unique( array( $a, $b, $c ) ) as $f ) {
				$ip = "$f.$f.$f.$f";
				$this->assertTrue( IP::isValid( $ip ), "$ip is a valid IPv4 address" );
			}
		}
		foreach ( range( 0x0, 0xFFFF, 0xF ) as $i ) {
			$a = sprintf( "%04x", $i );
			$b = sprintf( "%03x", $i );
			$c = sprintf( "%02x", $i );
			foreach ( array_unique( array( $a, $b, $c ) ) as $f ) {
				$ip = "$f:$f:$f:$f:$f:$f:$f:$f";
				$this->assertTrue( IP::isValid( $ip ), "$ip is a valid IPv6 address" );
			}
		}
		// test with some abbreviations
		$this->assertFalse( IP::isValid( ':fc:100::' ), 'IPv6 starting with lone ":"' );
		$this->assertFalse( IP::isValid( 'fc:100:::' ), 'IPv6 ending with a ":::"' );
		$this->assertFalse( IP::isValid( 'fc:300' ), 'IPv6 with only 2 words' );
		$this->assertFalse( IP::isValid( 'fc:100:300' ), 'IPv6 with only 3 words' );

		$this->assertTrue( IP::isValid( 'fc:100::' ) );
		$this->assertTrue( IP::isValid( 'fc:100:a:d:1:e::' ) );
		$this->assertTrue( IP::isValid( 'fc:100:a:d:1:e:ac::' ) );

		$this->assertTrue( IP::isValid( 'fc::100' ), 'IPv6 with "::" and 2 words' );
		$this->assertTrue( IP::isValid( 'fc::100:a' ), 'IPv6 with "::" and 3 words' );
		$this->assertTrue( IP::isValid( '2001::df' ), 'IPv6 with "::" and 2 words' );
		$this->assertTrue( IP::isValid( '2001:5c0:1400:a::df' ), 'IPv6 with "::" and 5 words' );
		$this->assertTrue( IP::isValid( '2001:5c0:1400:a::df:2' ), 'IPv6 with "::" and 6 words' );
		$this->assertTrue( IP::isValid( 'fc::100:a:d:1' ), 'IPv6 with "::" and 5 words' );
		$this->assertTrue( IP::isValid( 'fc::100:a:d:1:e:ac' ), 'IPv6 with "::" and 7 words' );

		$this->assertFalse( IP::isValid( 'fc:100:a:d:1:e:ac:0::' ), 'IPv6 with 8 words ending with "::"' );
		$this->assertFalse( IP::isValid( 'fc:100:a:d:1:e:ac:0:1::' ), 'IPv6 with 9 words ending with "::"' );
	}

	/**
	 * @covers IP::isValid
	 */
	public function testInvalidIPs() {
		// Out of range...
		foreach ( range( 256, 999 ) as $i ) {
			$a = sprintf( "%03d", $i );
			$b = sprintf( "%02d", $i );
			$c = sprintf( "%01d", $i );
			foreach ( array_unique( array( $a, $b, $c ) ) as $f ) {
				$ip = "$f.$f.$f.$f";
				$this->assertFalse( IP::isValid( $ip ), "$ip is not a valid IPv4 address" );
			}
		}
		foreach ( range( 'g', 'z' ) as $i ) {
			$a = sprintf( "%04s", $i );
			$b = sprintf( "%03s", $i );
			$c = sprintf( "%02s", $i );
			foreach ( array_unique( array( $a, $b, $c ) ) as $f ) {
				$ip = "$f:$f:$f:$f:$f:$f:$f:$f";
				$this->assertFalse( IP::isValid( $ip ), "$ip is not a valid IPv6 address" );
			}
		}
		// Have CIDR
		$ipCIDRs = array(
			'212.35.31.121/32',
			'212.35.31.121/18',
			'212.35.31.121/24',
			'::ff:d:321:5/96',
			'ff::d3:321:5/116',
			'c:ff:12:1:ea:d:321:5/120',
		);
		foreach ( $ipCIDRs as $i ) {
			$this->assertFalse( IP::isValid( $i ),
				"$i is an invalid IP address because it is a block" );
		}
		// Incomplete/garbage
		$invalid = array(
			'www.xn--var-xla.net',
			'216.17.184.G',
			'216.17.184.1.',
			'216.17.184',
			'216.17.184.',
			'256.17.184.1'
		);
		foreach ( $invalid as $i ) {
			$this->assertFalse( IP::isValid( $i ), "$i is an invalid IP address" );
		}
	}

	/**
	 * @covers IP::isValidBlock
	 */
	public function testValidBlocks() {
		$valid = array(
			'116.17.184.5/32',
			'0.17.184.5/30',
			'16.17.184.1/24',
			'30.242.52.14/1',
			'10.232.52.13/8',
			'30.242.52.14/0',
			'::e:f:2001/96',
			'::c:f:2001/128',
			'::10:f:2001/70',
			'::fe:f:2001/1',
			'::6d:f:2001/8',
			'::fe:f:2001/0',
		);
		foreach ( $valid as $i ) {
			$this->assertTrue( IP::isValidBlock( $i ), "$i is a valid IP block" );
		}
	}

	/**
	 * @covers IP::isValidBlock
	 */
	public function testInvalidBlocks() {
		$invalid = array(
			'116.17.184.5/33',
			'0.17.184.5/130',
			'16.17.184.1/-1',
			'10.232.52.13/*',
			'7.232.52.13/ab',
			'11.232.52.13/',
			'::e:f:2001/129',
			'::c:f:2001/228',
			'::10:f:2001/-1',
			'::6d:f:2001/*',
			'::86:f:2001/ab',
			'::23:f:2001/',
		);
		foreach ( $invalid as $i ) {
			$this->assertFalse( IP::isValidBlock( $i ), "$i is not a valid IP block" );
		}
	}

	/**
	 * Improve IP::sanitizeIP() code coverage
	 * @todo Most probably incomplete
	 */
	public function testSanitizeIP() {
		$this->assertNull( IP::sanitizeIP( '' ) );
		$this->assertNull( IP::sanitizeIP( ' ' ) );
	}

	/**
	 * @covers IP::toUnsigned
	 * @dataProvider provideToUnsigned
	 */
	public function testToUnsigned( $expected, $input ) {
		$result = IP::toUnsigned( $input );
		$this->assertTrue( $result === false || is_string( $result ) || is_int( $result ) );
		$this->assertEquals( $expected, $result );
	}

	/**
	 * Provider for IP::testToUnsigned()
	 */
	public static function provideToUnsigned() {
		return array(
			array( 1, '0.0.0.1' ),
			array( 16909060, '1.2.3.4' ),
			array( 2130706433, '127.0.0.1' ),
			array( '2147483648', '128.0.0.0' ),
			array( '3735931646', '222.173.202.254' ),
			array( pow( 2, 32 ) - 1, '255.255.255.255' ),
			array( false, 'IN.VA.LI.D' ),
			array( 1, '::1' ),
			array( '42540766452641154071740215577757643572', '2001:0db8:85a3:0000:0000:8a2e:0370:7334' ),
			array( '42540766452641154071740215577757643572', '2001:db8:85a3::8a2e:0370:7334' ),
			array( false, 'IN:VA::LI:D' ),
			array( false, ':::1' )
		);
	}

	/**
	 * @covers IP::toHex
	 * @dataProvider provideToHex
	 */
	public function testToHex( $expected, $input ) {
		$result = IP::toHex( $input );
		$this->assertTrue( $result === false || is_string( $result ) );
		$this->assertEquals( $expected, $result );
	}

	/**
	 * Provider for IP::testToHex()
	 */
	public static function provideToHex() {
		return array(
			array( '00000001', '0.0.0.1' ),
			array( '01020304', '1.2.3.4' ),
			array( '7F000001', '127.0.0.1' ),
			array( '80000000', '128.0.0.0' ),
			array( 'DEADCAFE', '222.173.202.254' ),
			array( 'FFFFFFFF', '255.255.255.255' ),
			array( false, 'IN.VA.LI.D' ),
			array( 'v6-00000000000000000000000000000001', '::1' ),
			array( 'v6-20010DB885A3000000008A2E03707334', '2001:0db8:85a3:0000:0000:8a2e:0370:7334' ),
			array( 'v6-20010DB885A3000000008A2E03707334', '2001:db8:85a3::8a2e:0370:7334' ),
			array( false, 'IN:VA::LI:D' ),
			array( false, ':::1' )
		);
	}

	/**
	 * @covers IP::isPublic
	 */
	public function testPrivateIPs() {
		$private = array( 'fc00::3', 'fc00::ff', '::1', '10.0.0.1', '172.16.0.1', '192.168.0.1' );
		foreach ( $private as $p ) {
			$this->assertFalse( IP::isPublic( $p ), "$p is not a public IP address" );
		}
		$public = array( '2001:5c0:1000:a::133', 'fc::3', '00FC::' );
		foreach ( $public as $p ) {
			$this->assertTrue( IP::isPublic( $p ), "$p is a public IP address" );
		}
	}

	// Private wrapper used to test CIDR Parsing.
	private function assertFalseCIDR( $CIDR, $msg = '' ) {
		$ff = array( false, false );
		$this->assertEquals( $ff, IP::parseCIDR( $CIDR ), $msg );
	}

	// Private wrapper to test network shifting using only dot notation
	private function assertNet( $expected, $CIDR ) {
		$parse = IP::parseCIDR( $CIDR );
		$this->assertEquals( $expected, long2ip( $parse[0] ), "network shifting $CIDR" );
	}

	/**
	 * @covers IP::hexToQuad
	 */
	public function testHexToQuad() {
		$this->assertEquals( '0.0.0.1', IP::hexToQuad( '00000001' ) );
		$this->assertEquals( '255.0.0.0', IP::hexToQuad( 'FF000000' ) );
		$this->assertEquals( '255.255.255.255', IP::hexToQuad( 'FFFFFFFF' ) );
		$this->assertEquals( '10.188.222.255', IP::hexToQuad( '0ABCDEFF' ) );
		// hex not left-padded...
		$this->assertEquals( '0.0.0.0', IP::hexToQuad( '0' ) );
		$this->assertEquals( '0.0.0.1', IP::hexToQuad( '1' ) );
		$this->assertEquals( '0.0.0.255', IP::hexToQuad( 'FF' ) );
		$this->assertEquals( '0.0.255.0', IP::hexToQuad( 'FF00' ) );
	}

	/**
	 * @covers IP::hexToOctet
	 */
	public function testHexToOctet() {
		$this->assertEquals( '0:0:0:0:0:0:0:1',
			IP::hexToOctet( '00000000000000000000000000000001' ) );
		$this->assertEquals( '0:0:0:0:0:0:FF:3',
			IP::hexToOctet( '00000000000000000000000000FF0003' ) );
		$this->assertEquals( '0:0:0:0:0:0:FF00:6',
			IP::hexToOctet( '000000000000000000000000FF000006' ) );
		$this->assertEquals( '0:0:0:0:0:0:FCCF:FAFF',
			IP::hexToOctet( '000000000000000000000000FCCFFAFF' ) );
		$this->assertEquals( 'FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF',
			IP::hexToOctet( 'FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF' ) );
		// hex not left-padded...
		$this->assertEquals( '0:0:0:0:0:0:0:0', IP::hexToOctet( '0' ) );
		$this->assertEquals( '0:0:0:0:0:0:0:1', IP::hexToOctet( '1' ) );
		$this->assertEquals( '0:0:0:0:0:0:0:FF', IP::hexToOctet( 'FF' ) );
		$this->assertEquals( '0:0:0:0:0:0:0:FFD0', IP::hexToOctet( 'FFD0' ) );
		$this->assertEquals( '0:0:0:0:0:0:FA00:0', IP::hexToOctet( 'FA000000' ) );
		$this->assertEquals( '0:0:0:0:0:0:FCCF:FAFF', IP::hexToOctet( 'FCCFFAFF' ) );
	}

	/**
	 * IP::parseCIDR() returns an array containing a signed IP address
	 * representing the network mask and the bit mask.
	 * @covers IP::parseCIDR
	 */
	public function testCIDRParsing() {
		$this->assertFalseCIDR( '192.0.2.0', "missing mask" );
		$this->assertFalseCIDR( '192.0.2.0/', "missing bitmask" );

		// Verify if statement
		$this->assertFalseCIDR( '256.0.0.0/32', "invalid net" );
		$this->assertFalseCIDR( '192.0.2.0/AA', "mask not numeric" );
		$this->assertFalseCIDR( '192.0.2.0/-1', "mask < 0" );
		$this->assertFalseCIDR( '192.0.2.0/33', "mask > 32" );

		// Check internal logic
		# 0 mask always result in array(0,0)
		$this->assertEquals( array( 0, 0 ), IP::parseCIDR( '192.0.0.2/0' ) );
		$this->assertEquals( array( 0, 0 ), IP::parseCIDR( '0.0.0.0/0' ) );
		$this->assertEquals( array( 0, 0 ), IP::parseCIDR( '255.255.255.255/0' ) );

		// @todo FIXME: Add more tests.

		# This part test network shifting
		$this->assertNet( '192.0.0.0', '192.0.0.2/24' );
		$this->assertNet( '192.168.5.0', '192.168.5.13/24' );
		$this->assertNet( '10.0.0.160', '10.0.0.161/28' );
		$this->assertNet( '10.0.0.0', '10.0.0.3/28' );
		$this->assertNet( '10.0.0.0', '10.0.0.3/30' );
		$this->assertNet( '10.0.0.4', '10.0.0.4/30' );
		$this->assertNet( '172.17.32.0', '172.17.35.48/21' );
		$this->assertNet( '10.128.0.0', '10.135.0.0/9' );
		$this->assertNet( '134.0.0.0', '134.0.5.1/8' );
	}

	/**
	 * @covers IP::canonicalize
	 */
	public function testIPCanonicalizeOnValidIp() {
		$this->assertEquals( '192.0.2.152', IP::canonicalize( '192.0.2.152' ),
			'Canonicalization of a valid IP returns it unchanged' );
	}

	/**
	 * @covers IP::canonicalize
	 */
	public function testIPCanonicalizeMappedAddress() {
		$this->assertEquals(
			'192.0.2.152',
			IP::canonicalize( '::ffff:192.0.2.152' )
		);
		$this->assertEquals(
			'192.0.2.152',
			IP::canonicalize( '::192.0.2.152' )
		);
	}

	/**
	 * Issues there are most probably from IP::toHex() or IP::parseRange()
	 * @covers IP::isInRange
	 * @dataProvider provideIPsAndRanges
	 */
	public function testIPIsInRange( $expected, $addr, $range, $message = '' ) {
		$this->assertEquals(
			$expected,
			IP::isInRange( $addr, $range ),
			$message
		);
	}

	/** Provider for testIPIsInRange() */
	public static function provideIPsAndRanges() {
		# Format: (expected boolean, address, range, optional message)
		return array(
			# IPv4
			array( true, '192.0.2.0', '192.0.2.0/24', 'Network address' ),
			array( true, '192.0.2.77', '192.0.2.0/24', 'Simple address' ),
			array( true, '192.0.2.255', '192.0.2.0/24', 'Broadcast address' ),

			array( false, '0.0.0.0', '192.0.2.0/24' ),
			array( false, '255.255.255', '192.0.2.0/24' ),

			# IPv6
			array( false, '::1', '2001:DB8::/32' ),
			array( false, '::', '2001:DB8::/32' ),
			array( false, 'FE80::1', '2001:DB8::/32' ),

			array( true, '2001:DB8::', '2001:DB8::/32' ),
			array( true, '2001:0DB8::', '2001:DB8::/32' ),
			array( true, '2001:DB8::1', '2001:DB8::/32' ),
			array( true, '2001:0DB8::1', '2001:DB8::/32' ),
			array( true, '2001:0DB8:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF',
				'2001:DB8::/32' ),

			array( false, '2001:0DB8:F::', '2001:DB8::/96' ),
		);
	}

	/**
	 * Test for IP::splitHostAndPort().
	 * @dataProvider provideSplitHostAndPort
	 */
	public function testSplitHostAndPort( $expected, $input, $description ) {
		$this->assertEquals( $expected, IP::splitHostAndPort( $input ), $description );
	}

	/**
	 * Provider for IP::splitHostAndPort()
	 */
	public static function provideSplitHostAndPort() {
		return array(
			array( false, '[', 'Unclosed square bracket' ),
			array( false, '[::', 'Unclosed square bracket 2' ),
			array( array( '::', false ), '::', 'Bare IPv6 0' ),
			array( array( '::1', false ), '::1', 'Bare IPv6 1' ),
			array( array( '::', false ), '[::]', 'Bracketed IPv6 0' ),
			array( array( '::1', false ), '[::1]', 'Bracketed IPv6 1' ),
			array( array( '::1', 80 ), '[::1]:80', 'Bracketed IPv6 with port' ),
			array( false, '::x', 'Double colon but no IPv6' ),
			array( array( 'x', 80 ), 'x:80', 'Hostname and port' ),
			array( false, 'x:x', 'Hostname and invalid port' ),
			array( array( 'x', false ), 'x', 'Plain hostname' )
		);
	}

	/**
	 * Test for IP::combineHostAndPort()
	 * @dataProvider provideCombineHostAndPort
	 */
	public function testCombineHostAndPort( $expected, $input, $description ) {
		list( $host, $port, $defaultPort ) = $input;
		$this->assertEquals(
			$expected,
			IP::combineHostAndPort( $host, $port, $defaultPort ),
			$description );
	}

	/**
	 * Provider for IP::combineHostAndPort()
	 */
	public static function provideCombineHostAndPort() {
		return array(
			array( '[::1]', array( '::1', 2, 2 ), 'IPv6 default port' ),
			array( '[::1]:2', array( '::1', 2, 3 ), 'IPv6 non-default port' ),
			array( 'x', array( 'x', 2, 2 ), 'Normal default port' ),
			array( 'x:2', array( 'x', 2, 3 ), 'Normal non-default port' ),
		);
	}

	/**
	 * Test for IP::sanitizeRange()
	 * @dataProvider provideIPCIDRs
	 */
	public function testSanitizeRange( $input, $expected, $description ) {
		$this->assertEquals( $expected, IP::sanitizeRange( $input ), $description );
	}

	/**
	 * Provider for IP::testSanitizeRange()
	 */
	public static function provideIPCIDRs() {
		return array(
			array( '35.56.31.252/16', '35.56.0.0/16', 'IPv4 range' ),
			array( '135.16.21.252/24', '135.16.21.0/24', 'IPv4 range' ),
			array( '5.36.71.252/32', '5.36.71.252/32', 'IPv4 silly range' ),
			array( '5.36.71.252', '5.36.71.252', 'IPv4 non-range' ),
			array( '0:1:2:3:4:c5:f6:7/96', '0:1:2:3:4:C5:0:0/96', 'IPv6 range' ),
			array( '0:1:2:3:4:5:6:7/120', '0:1:2:3:4:5:6:0/120', 'IPv6 range' ),
			array( '0:e1:2:3:4:5:e6:7/128', '0:E1:2:3:4:5:E6:7/128', 'IPv6 silly range' ),
			array( '0:c1:A2:3:4:5:c6:7', '0:C1:A2:3:4:5:C6:7', 'IPv6 non range' ),
		);
	}

	/**
	 * Test for IP::prettifyIP()
	 * @dataProvider provideIPsToPrettify
	 */
	public function testPrettifyIP( $ip, $prettified ) {
		$this->assertEquals( $prettified, IP::prettifyIP( $ip ), "Prettify of $ip" );
	}

	/**
	 * Provider for IP::testPrettifyIP()
	 */
	public static function provideIPsToPrettify() {
		return array(
			array( '0:0:0:0:0:0:0:0', '::' ),
			array( '0:0:0::0:0:0', '::' ),
			array( '0:0:0:1:0:0:0:0', '0:0:0:1::' ),
			array( '0:0::f', '::f' ),
			array( '0::0:0:0:33:fef:b', '::33:fef:b' ),
			array( '3f:535:0:0:0:0:e:fbb', '3f:535::e:fbb' ),
			array( '0:0:fef:0:0:0:e:fbb', '0:0:fef::e:fbb' ),
			array( 'abbc:2004::0:0:0:0', 'abbc:2004::' ),
			array( 'cebc:2004:f:0:0:0:0:0', 'cebc:2004:f::' ),
			array( '0:0:0:0:0:0:0:0/16', '::/16' ),
			array( '0:0:0::0:0:0/64', '::/64' ),
			array( '0:0::f/52', '::f/52' ),
			array( '::0:0:33:fef:b/52', '::33:fef:b/52' ),
			array( '3f:535:0:0:0:0:e:fbb/48', '3f:535::e:fbb/48' ),
			array( '0:0:fef:0:0:0:e:fbb/96', '0:0:fef::e:fbb/96' ),
			array( 'abbc:2004:0:0::0:0/40', 'abbc:2004::/40' ),
			array( 'aebc:2004:f:0:0:0:0:0/80', 'aebc:2004:f::/80' ),
		);
	}
}