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[autoinstallsdev/mediawiki.git] / tests / phpunit / includes / MessageTest.php
diff --git a/tests/phpunit/includes/MessageTest.php b/tests/phpunit/includes/MessageTest.php
new file mode 100644 (file)
index 0000000..912bffe
--- /dev/null
@@ -0,0 +1,852 @@
+<?php
+
+use Wikimedia\TestingAccessWrapper;
+
+class MessageTest extends MediaWikiLangTestCase {
+
+       protected function setUp() {
+               parent::setUp();
+
+               $this->setMwGlobals( [
+                       'wgForceUIMsgAsContentMsg' => [],
+               ] );
+               $this->setUserLang( 'en' );
+       }
+
+       /**
+        * @covers Message::__construct
+        * @dataProvider provideConstructor
+        */
+       public function testConstructor( $expectedLang, $key, $params, $language ) {
+               $message = new Message( $key, $params, $language );
+
+               $this->assertSame( $key, $message->getKey() );
+               $this->assertSame( $params, $message->getParams() );
+               $this->assertEquals( $expectedLang, $message->getLanguage() );
+
+               $messageSpecifier = $this->getMockForAbstractClass( 'MessageSpecifier' );
+               $messageSpecifier->expects( $this->any() )
+                       ->method( 'getKey' )->will( $this->returnValue( $key ) );
+               $messageSpecifier->expects( $this->any() )
+                       ->method( 'getParams' )->will( $this->returnValue( $params ) );
+               $message = new Message( $messageSpecifier, [], $language );
+
+               $this->assertSame( $key, $message->getKey() );
+               $this->assertSame( $params, $message->getParams() );
+               $this->assertEquals( $expectedLang, $message->getLanguage() );
+       }
+
+       public static function provideConstructor() {
+               $langDe = Language::factory( 'de' );
+               $langEn = Language::factory( 'en' );
+
+               return [
+                       [ $langDe, 'foo', [], $langDe ],
+                       [ $langDe, 'foo', [ 'bar' ], $langDe ],
+                       [ $langEn, 'foo', [ 'bar' ], null ]
+               ];
+       }
+
+       public static function provideConstructorParams() {
+               return [
+                       [
+                               [],
+                               [],
+                       ],
+                       [
+                               [],
+                               [ [] ],
+                       ],
+                       [
+                               [ 'foo' ],
+                               [ 'foo' ],
+                       ],
+                       [
+                               [ 'foo', 'bar' ],
+                               [ 'foo', 'bar' ],
+                       ],
+                       [
+                               [ 'baz' ],
+                               [ [ 'baz' ] ],
+                       ],
+                       [
+                               [ 'baz', 'foo' ],
+                               [ [ 'baz', 'foo' ] ],
+                       ],
+                       [
+                               [ Message::rawParam( 'baz' ) ],
+                               [ Message::rawParam( 'baz' ) ],
+                       ],
+                       [
+                               [ Message::rawParam( 'baz' ), 'foo' ],
+                               [ Message::rawParam( 'baz' ), 'foo' ],
+                       ],
+                       [
+                               [ Message::rawParam( 'baz' ) ],
+                               [ [ Message::rawParam( 'baz' ) ] ],
+                       ],
+                       [
+                               [ Message::rawParam( 'baz' ), 'foo' ],
+                               [ [ Message::rawParam( 'baz' ), 'foo' ] ],
+                       ],
+
+                       // Test handling of erroneous input, to detect if it changes
+                       [
+                               [ [ 'baz', 'foo' ], 'hhh' ],
+                               [ [ 'baz', 'foo' ], 'hhh' ],
+                       ],
+                       [
+                               [ [ 'baz', 'foo' ], 'hhh', [ 'ahahahahha' ] ],
+                               [ [ 'baz', 'foo' ], 'hhh', [ 'ahahahahha' ] ],
+                       ],
+                       [
+                               [ [ 'baz', 'foo' ], [ 'ahahahahha' ] ],
+                               [ [ 'baz', 'foo' ], [ 'ahahahahha' ] ],
+                       ],
+                       [
+                               [ [ 'baz' ], [ 'ahahahahha' ] ],
+                               [ [ 'baz' ], [ 'ahahahahha' ] ],
+                       ],
+               ];
+       }
+
+       /**
+        * @covers Message::__construct
+        * @covers Message::getParams
+        * @dataProvider provideConstructorParams
+        */
+       public function testConstructorParams( $expected, $args ) {
+               $msg = new Message( 'imasomething' );
+
+               $returned = call_user_func_array( [ $msg, 'params' ], $args );
+
+               $this->assertSame( $msg, $returned );
+               $this->assertSame( $expected, $msg->getParams() );
+       }
+
+       public static function provideConstructorLanguage() {
+               return [
+                       [ 'foo', [ 'bar' ], 'en' ],
+                       [ 'foo', [ 'bar' ], 'de' ]
+               ];
+       }
+
+       /**
+        * @covers Message::__construct
+        * @covers Message::getLanguage
+        * @dataProvider provideConstructorLanguage
+        */
+       public function testConstructorLanguage( $key, $params, $languageCode ) {
+               $language = Language::factory( $languageCode );
+               $message = new Message( $key, $params, $language );
+
+               $this->assertEquals( $language, $message->getLanguage() );
+       }
+
+       public static function provideKeys() {
+               return [
+                       'string' => [
+                               'key' => 'mainpage',
+                               'expected' => [ 'mainpage' ],
+                       ],
+                       'single' => [
+                               'key' => [ 'mainpage' ],
+                               'expected' => [ 'mainpage' ],
+                       ],
+                       'multi' => [
+                               'key' => [ 'mainpage-foo', 'mainpage-bar', 'mainpage' ],
+                               'expected' => [ 'mainpage-foo', 'mainpage-bar', 'mainpage' ],
+                       ],
+                       'empty' => [
+                               'key' => [],
+                               'expected' => null,
+                               'exception' => 'InvalidArgumentException',
+                       ],
+                       'null' => [
+                               'key' => null,
+                               'expected' => null,
+                               'exception' => 'InvalidArgumentException',
+                       ],
+                       'bad type' => [
+                               'key' => 123,
+                               'expected' => null,
+                               'exception' => 'InvalidArgumentException',
+                       ],
+               ];
+       }
+
+       /**
+        * @covers Message::__construct
+        * @covers Message::getKey
+        * @covers Message::isMultiKey
+        * @covers Message::getKeysToTry
+        * @dataProvider provideKeys
+        */
+       public function testKeys( $key, $expected, $exception = null ) {
+               if ( $exception ) {
+                       $this->setExpectedException( $exception );
+               }
+
+               $msg = new Message( $key );
+               $this->assertContains( $msg->getKey(), $expected );
+               $this->assertSame( $expected, $msg->getKeysToTry() );
+               $this->assertSame( count( $expected ) > 1, $msg->isMultiKey() );
+       }
+
+       /**
+        * @covers ::wfMessage
+        */
+       public function testWfMessage() {
+               $this->assertInstanceOf( 'Message', wfMessage( 'mainpage' ) );
+               $this->assertInstanceOf( 'Message', wfMessage( 'i-dont-exist-evar' ) );
+       }
+
+       /**
+        * @covers Message::newFromKey
+        */
+       public function testNewFromKey() {
+               $this->assertInstanceOf( 'Message', Message::newFromKey( 'mainpage' ) );
+               $this->assertInstanceOf( 'Message', Message::newFromKey( 'i-dont-exist-evar' ) );
+       }
+
+       /**
+        * @covers ::wfMessage
+        * @covers Message::__construct
+        */
+       public function testWfMessageParams() {
+               $this->assertSame( 'Return to $1.', wfMessage( 'returnto' )->text() );
+               $this->assertSame( 'Return to $1.', wfMessage( 'returnto', [] )->text() );
+               $this->assertSame(
+                       'Return to 1,024.',
+                       wfMessage( 'returnto', Message::numParam( 1024 ) )->text()
+               );
+               $this->assertSame(
+                       'Return to 1,024.',
+                       wfMessage( 'returnto', [ Message::numParam( 1024 ) ] )->text()
+               );
+               $this->assertSame(
+                       'You have foo (bar).',
+                       wfMessage( 'youhavenewmessages', 'foo', 'bar' )->text()
+               );
+               $this->assertSame(
+                       'You have foo (bar).',
+                       wfMessage( 'youhavenewmessages', [ 'foo', 'bar' ] )->text()
+               );
+               $this->assertSame(
+                       'You have 1,024 (bar).',
+                       wfMessage(
+                               'youhavenewmessages',
+                               Message::numParam( 1024 ), 'bar'
+                       )->text()
+               );
+               $this->assertSame(
+                       'You have foo (2,048).',
+                       wfMessage(
+                               'youhavenewmessages',
+                               'foo', Message::numParam( 2048 )
+                       )->text()
+               );
+               $this->assertSame(
+                       'You have 1,024 (2,048).',
+                       wfMessage(
+                               'youhavenewmessages',
+                               [ Message::numParam( 1024 ), Message::numParam( 2048 ) ]
+                       )->text()
+               );
+       }
+
+       /**
+        * @covers Message::exists
+        */
+       public function testExists() {
+               $this->assertTrue( wfMessage( 'mainpage' )->exists() );
+               $this->assertTrue( wfMessage( 'mainpage' )->params( [] )->exists() );
+               $this->assertTrue( wfMessage( 'mainpage' )->rawParams( 'foo', 123 )->exists() );
+               $this->assertFalse( wfMessage( 'i-dont-exist-evar' )->exists() );
+               $this->assertFalse( wfMessage( 'i-dont-exist-evar' )->params( [] )->exists() );
+               $this->assertFalse( wfMessage( 'i-dont-exist-evar' )->rawParams( 'foo', 123 )->exists() );
+       }
+
+       /**
+        * @covers Message::__construct
+        * @covers Message::text
+        * @covers Message::plain
+        * @covers Message::escaped
+        * @covers Message::toString
+        */
+       public function testToStringKey() {
+               $this->assertSame( 'Main Page', wfMessage( 'mainpage' )->text() );
+               $this->assertSame( '⧼i-dont-exist-evar⧽', wfMessage( 'i-dont-exist-evar' )->text() );
+               $this->assertSame( '⧼i&lt;dont&gt;exist-evar⧽', wfMessage( 'i<dont>exist-evar' )->text() );
+               $this->assertSame( '⧼i-dont-exist-evar⧽', wfMessage( 'i-dont-exist-evar' )->plain() );
+               $this->assertSame( '⧼i&lt;dont&gt;exist-evar⧽', wfMessage( 'i<dont>exist-evar' )->plain() );
+               $this->assertSame( '⧼i-dont-exist-evar⧽', wfMessage( 'i-dont-exist-evar' )->escaped() );
+               $this->assertSame(
+                       '⧼i&lt;dont&gt;exist-evar⧽',
+                       wfMessage( 'i<dont>exist-evar' )->escaped()
+               );
+       }
+
+       public static function provideToString() {
+               return [
+                       // key, transformation, transformed, transformed implicitly
+                       [ 'mainpage', 'plain', 'Main Page', 'Main Page' ],
+                       [ 'i-dont-exist-evar', 'plain', '⧼i-dont-exist-evar⧽', '⧼i-dont-exist-evar⧽' ],
+                       [ 'i-dont-exist-evar', 'escaped', '⧼i-dont-exist-evar⧽', '⧼i-dont-exist-evar⧽' ],
+                       [ 'script>alert(1)</script', 'escaped', '⧼script&gt;alert(1)&lt;/script⧽',
+                               '⧼script&gt;alert(1)&lt;/script⧽' ],
+                       [ 'script>alert(1)</script', 'plain', '⧼script&gt;alert(1)&lt;/script⧽',
+                               '⧼script&gt;alert(1)&lt;/script⧽' ],
+               ];
+       }
+
+       /**
+        * @covers Message::toString
+        * @covers Message::__toString
+        * @dataProvider provideToString
+        */
+       public function testToString( $key, $format, $expect, $expectImplicit ) {
+               $msg = new Message( $key );
+               $this->assertSame( $expect, $msg->$format() );
+               $this->assertSame( $expect, $msg->toString(), 'toString is unaffected by previous call' );
+               $this->assertSame( $expectImplicit, $msg->__toString() );
+               $this->assertSame( $expect, $msg->toString(), 'toString is unaffected by __toString' );
+       }
+
+       public static function provideToString_raw() {
+               return [
+                       [ '<span>foo</span>', 'parse', '<span>foo</span>', '<span>foo</span>' ],
+                       [ '<span>foo</span>', 'escaped', '&lt;span&gt;foo&lt;/span&gt;',
+                               '<span>foo</span>' ],
+                       [ '<span>foo</span>', 'plain', '<span>foo</span>', '<span>foo</span>' ],
+                       [ '<script>alert(1)</script>', 'parse', '&lt;script&gt;alert(1)&lt;/script&gt;',
+                               '&lt;script&gt;alert(1)&lt;/script&gt;' ],
+                       [ '<script>alert(1)</script>', 'escaped', '&lt;script&gt;alert(1)&lt;/script&gt;',
+                               '&lt;script&gt;alert(1)&lt;/script&gt;' ],
+                       [ '<script>alert(1)</script>', 'plain', '<script>alert(1)</script>',
+                               '&lt;script&gt;alert(1)&lt;/script&gt;' ],
+               ];
+       }
+
+       /**
+        * @covers Message::toString
+        * @covers Message::__toString
+        * @dataProvider provideToString_raw
+        */
+       public function testToString_raw( $message, $format, $expect, $expectImplicit ) {
+               // make the message behave like RawMessage and use the key as-is
+               $msg = $this->getMockBuilder( Message::class )->setMethods( [ 'fetchMessage' ] )
+                       ->disableOriginalConstructor()
+                       ->getMock();
+               $msg->expects( $this->any() )->method( 'fetchMessage' )->willReturn( $message );
+               /** @var Message $msg */
+               $this->assertSame( $expect, $msg->$format() );
+               $this->assertSame( $expect, $msg->toString(), 'toString is unaffected by previous call' );
+               $this->assertSame( $expectImplicit, $msg->__toString() );
+               $this->assertSame( $expect, $msg->toString(), 'toString is unaffected by __toString' );
+       }
+
+       /**
+        * @covers Message::inLanguage
+        */
+       public function testInLanguage() {
+               $this->assertSame( 'Main Page', wfMessage( 'mainpage' )->inLanguage( 'en' )->text() );
+               $this->assertSame( 'Заглавная страница',
+                       wfMessage( 'mainpage' )->inLanguage( 'ru' )->text() );
+
+               // NOTE: make sure internal caching of the message text is reset appropriately
+               $msg = wfMessage( 'mainpage' );
+               $this->assertSame( 'Main Page', $msg->inLanguage( Language::factory( 'en' ) )->text() );
+               $this->assertSame(
+                       'Заглавная страница',
+                       $msg->inLanguage( Language::factory( 'ru' ) )->text()
+               );
+       }
+
+       /**
+        * @covers Message::rawParam
+        * @covers Message::rawParams
+        */
+       public function testRawParams() {
+               $this->assertSame(
+                       '(Заглавная страница)',
+                       wfMessage( 'parentheses', 'Заглавная страница' )->plain()
+               );
+               $this->assertSame(
+                       '(Заглавная страница $1)',
+                       wfMessage( 'parentheses', 'Заглавная страница $1' )->plain()
+               );
+               $this->assertSame(
+                       '(Заглавная страница)',
+                       wfMessage( 'parentheses' )->rawParams( 'Заглавная страница' )->plain()
+               );
+               $this->assertSame(
+                       '(Заглавная страница $1)',
+                       wfMessage( 'parentheses' )->rawParams( 'Заглавная страница $1' )->plain()
+               );
+       }
+
+       /**
+        * @covers RawMessage::__construct
+        * @covers RawMessage::fetchMessage
+        */
+       public function testRawMessage() {
+               $msg = new RawMessage( 'example &' );
+               $this->assertSame( 'example &', $msg->plain() );
+               $this->assertSame( 'example &amp;', $msg->escaped() );
+       }
+
+       public function testRawHtmlInMsg() {
+               global $wgParserConf;
+               $this->setMwGlobals( 'wgRawHtml', true );
+               // We have to reset the core hook registration.
+               // to register the html hook
+               MessageCache::destroyInstance();
+               $this->setMwGlobals( 'wgParser',
+                       ObjectFactory::constructClassInstance( $wgParserConf['class'], [ $wgParserConf ] )
+               );
+
+               $msg = new RawMessage( '<html><script>alert("xss")</script></html>' );
+               $txt = '<span class="error">&lt;html&gt; tags cannot be' .
+                       ' used outside of normal pages.</span>';
+               $this->assertSame( $txt, $msg->parse() );
+       }
+
+       /**
+        * @covers Message::params
+        * @covers Message::toString
+        * @covers Message::replaceParameters
+        */
+       public function testReplaceManyParams() {
+               $msg = new RawMessage( '$1$2$3$4$5$6$7$8$9$10$11$12' );
+               // One less than above has placeholders
+               $params = [ 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k' ];
+               $this->assertSame(
+                       'abcdefghijka2',
+                       $msg->params( $params )->plain(),
+                       'Params > 9 are replaced correctly'
+               );
+
+               $msg = new RawMessage( 'Params$*' );
+               $params = [ 'ab', 'bc', 'cd' ];
+               $this->assertSame(
+                       'Params: ab, bc, cd',
+                       $msg->params( $params )->text()
+               );
+       }
+
+       /**
+        * @covers Message::numParam
+        * @covers Message::numParams
+        */
+       public function testNumParams() {
+               $lang = Language::factory( 'en' );
+               $msg = new RawMessage( '$1' );
+
+               $this->assertSame(
+                       $lang->formatNum( 123456.789 ),
+                       $msg->inLanguage( $lang )->numParams( 123456.789 )->plain(),
+                       'numParams is handled correctly'
+               );
+       }
+
+       /**
+        * @covers Message::durationParam
+        * @covers Message::durationParams
+        */
+       public function testDurationParams() {
+               $lang = Language::factory( 'en' );
+               $msg = new RawMessage( '$1' );
+
+               $this->assertSame(
+                       $lang->formatDuration( 1234 ),
+                       $msg->inLanguage( $lang )->durationParams( 1234 )->plain(),
+                       'durationParams is handled correctly'
+               );
+       }
+
+       /**
+        * FIXME: This should not need database, but Language#formatExpiry does (T57912)
+        * @group Database
+        * @covers Message::expiryParam
+        * @covers Message::expiryParams
+        */
+       public function testExpiryParams() {
+               $lang = Language::factory( 'en' );
+               $msg = new RawMessage( '$1' );
+
+               $this->assertSame(
+                       $lang->formatExpiry( wfTimestampNow() ),
+                       $msg->inLanguage( $lang )->expiryParams( wfTimestampNow() )->plain(),
+                       'expiryParams is handled correctly'
+               );
+       }
+
+       /**
+        * @covers Message::timeperiodParam
+        * @covers Message::timeperiodParams
+        */
+       public function testTimeperiodParams() {
+               $lang = Language::factory( 'en' );
+               $msg = new RawMessage( '$1' );
+
+               $this->assertSame(
+                       $lang->formatTimePeriod( 1234 ),
+                       $msg->inLanguage( $lang )->timeperiodParams( 1234 )->plain(),
+                       'timeperiodParams is handled correctly'
+               );
+       }
+
+       /**
+        * @covers Message::sizeParam
+        * @covers Message::sizeParams
+        */
+       public function testSizeParams() {
+               $lang = Language::factory( 'en' );
+               $msg = new RawMessage( '$1' );
+
+               $this->assertSame(
+                       $lang->formatSize( 123456 ),
+                       $msg->inLanguage( $lang )->sizeParams( 123456 )->plain(),
+                       'sizeParams is handled correctly'
+               );
+       }
+
+       /**
+        * @covers Message::bitrateParam
+        * @covers Message::bitrateParams
+        */
+       public function testBitrateParams() {
+               $lang = Language::factory( 'en' );
+               $msg = new RawMessage( '$1' );
+
+               $this->assertSame(
+                       $lang->formatBitrate( 123456 ),
+                       $msg->inLanguage( $lang )->bitrateParams( 123456 )->plain(),
+                       'bitrateParams is handled correctly'
+               );
+       }
+
+       public static function providePlaintextParams() {
+               return [
+                       [
+                               'one $2 <div>foo</div> [[Bar]] {{Baz}} &lt;',
+                               'plain',
+                       ],
+
+                       [
+                               // expect
+                               'one $2 <div>foo</div> [[Bar]] {{Baz}} &lt;',
+                               // format
+                               'text',
+                       ],
+                       [
+                               'one $2 &lt;div&gt;foo&lt;/div&gt; [[Bar]] {{Baz}} &amp;lt;',
+                               'escaped',
+                       ],
+
+                       [
+                               'one $2 &lt;div&gt;foo&lt;/div&gt; [[Bar]] {{Baz}} &amp;lt;',
+                               'parse',
+                       ],
+
+                       [
+                               "<p>one $2 &lt;div&gt;foo&lt;/div&gt; [[Bar]] {{Baz}} &amp;lt;\n</p>",
+                               'parseAsBlock',
+                       ],
+               ];
+       }
+
+       /**
+        * @covers Message::plaintextParam
+        * @covers Message::plaintextParams
+        * @covers Message::formatPlaintext
+        * @covers Message::toString
+        * @covers Message::parse
+        * @covers Message::parseAsBlock
+        * @dataProvider providePlaintextParams
+        */
+       public function testPlaintextParams( $expect, $format ) {
+               $lang = Language::factory( 'en' );
+
+               $msg = new RawMessage( '$1 $2' );
+               $params = [
+                       'one $2',
+                       '<div>foo</div> [[Bar]] {{Baz}} &lt;',
+               ];
+               $this->assertSame(
+                       $expect,
+                       $msg->inLanguage( $lang )->plaintextParams( $params )->$format(),
+                       "Fail formatting for $format"
+               );
+       }
+
+       public static function provideListParam() {
+               $lang = Language::factory( 'de' );
+               $msg1 = new Message( 'mainpage', [], $lang );
+               $msg2 = new RawMessage( "''link''", [], $lang );
+
+               return [
+                       'Simple comma list' => [
+                               [ 'a', 'b', 'c' ],
+                               'comma',
+                               'text',
+                               'a, b, c'
+                       ],
+
+                       'Simple semicolon list' => [
+                               [ 'a', 'b', 'c' ],
+                               'semicolon',
+                               'text',
+                               'a; b; c'
+                       ],
+
+                       'Simple pipe list' => [
+                               [ 'a', 'b', 'c' ],
+                               'pipe',
+                               'text',
+                               'a | b | c'
+                       ],
+
+                       'Simple text list' => [
+                               [ 'a', 'b', 'c' ],
+                               'text',
+                               'text',
+                               'a, b and c'
+                       ],
+
+                       'Empty list' => [
+                               [],
+                               'comma',
+                               'text',
+                               ''
+                       ],
+
+                       'List with all "before" params, ->text()' => [
+                               [ "''link''", Message::numParam( 12345678 ) ],
+                               'semicolon',
+                               'text',
+                               '\'\'link\'\'; 12,345,678'
+                       ],
+
+                       'List with all "before" params, ->parse()' => [
+                               [ "''link''", Message::numParam( 12345678 ) ],
+                               'semicolon',
+                               'parse',
+                               '<i>link</i>; 12,345,678'
+                       ],
+
+                       'List with all "after" params, ->text()' => [
+                               [ $msg1, $msg2, Message::rawParam( '[[foo]]' ) ],
+                               'semicolon',
+                               'text',
+                               'Main Page; \'\'link\'\'; [[foo]]'
+                       ],
+
+                       'List with all "after" params, ->parse()' => [
+                               [ $msg1, $msg2, Message::rawParam( '[[foo]]' ) ],
+                               'semicolon',
+                               'parse',
+                               'Main Page; <i>link</i>; [[foo]]'
+                       ],
+
+                       'List with both "before" and "after" params, ->text()' => [
+                               [ $msg1, $msg2, Message::rawParam( '[[foo]]' ), "''link''", Message::numParam( 12345678 ) ],
+                               'semicolon',
+                               'text',
+                               'Main Page; \'\'link\'\'; [[foo]]; \'\'link\'\'; 12,345,678'
+                       ],
+
+                       'List with both "before" and "after" params, ->parse()' => [
+                               [ $msg1, $msg2, Message::rawParam( '[[foo]]' ), "''link''", Message::numParam( 12345678 ) ],
+                               'semicolon',
+                               'parse',
+                               'Main Page; <i>link</i>; [[foo]]; <i>link</i>; 12,345,678'
+                       ],
+               ];
+       }
+
+       /**
+        * @covers Message::listParam
+        * @covers Message::extractParam
+        * @covers Message::formatListParam
+        * @dataProvider provideListParam
+        */
+       public function testListParam( $list, $type, $format, $expect ) {
+               $lang = Language::factory( 'en' );
+
+               $msg = new RawMessage( '$1' );
+               $msg->params( [ Message::listParam( $list, $type ) ] );
+               $this->assertEquals(
+                       $expect,
+                       $msg->inLanguage( $lang )->$format()
+               );
+       }
+
+       /**
+        * @covers Message::extractParam
+        */
+       public function testMessageAsParam() {
+               $this->setMwGlobals( [
+                       'wgScript' => '/wiki/index.php',
+                       'wgArticlePath' => '/wiki/$1',
+               ] );
+
+               $msg = new Message( 'returnto', [
+                       new Message( 'apihelp-link', [
+                               'foo', new Message( 'mainpage', [], Language::factory( 'en' ) )
+                       ], Language::factory( 'de' ) )
+               ], Language::factory( 'es' ) );
+
+               $this->assertEquals(
+                       'Volver a [[Special:ApiHelp/foo|Página principal]].',
+                       $msg->text(),
+                       'Process with ->text()'
+               );
+               $this->assertEquals(
+                       '<p>Volver a <a href="/wiki/Special:ApiHelp/foo" title="Special:ApiHelp/foo">Página '
+                               . "principal</a>.\n</p>",
+                       $msg->parseAsBlock(),
+                       'Process with ->parseAsBlock()'
+               );
+       }
+
+       public static function provideParser() {
+               return [
+                       [
+                               "''&'' <x><!-- x -->",
+                               'plain',
+                       ],
+
+                       [
+                               "''&'' <x><!-- x -->",
+                               'text',
+                       ],
+                       [
+                               '<i>&amp;</i> &lt;x&gt;',
+                               'parse',
+                       ],
+
+                       [
+                               "<p><i>&amp;</i> &lt;x&gt;\n</p>",
+                               'parseAsBlock',
+                       ],
+               ];
+       }
+
+       /**
+        * @covers Message::text
+        * @covers Message::parse
+        * @covers Message::parseAsBlock
+        * @covers Message::toString
+        * @covers Message::transformText
+        * @covers Message::parseText
+        * @dataProvider provideParser
+        */
+       public function testParser( $expect, $format ) {
+               $msg = new RawMessage( "''&'' <x><!-- x -->" );
+               $this->assertSame(
+                       $expect,
+                       $msg->inLanguage( 'en' )->$format()
+               );
+       }
+
+       /**
+        * @covers Message::inContentLanguage
+        */
+       public function testInContentLanguage() {
+               $this->setUserLang( 'fr' );
+
+               // NOTE: make sure internal caching of the message text is reset appropriately
+               $msg = wfMessage( 'mainpage' );
+               $this->assertSame( 'Hauptseite', $msg->inLanguage( 'de' )->plain(), "inLanguage( 'de' )" );
+               $this->assertSame( 'Main Page', $msg->inContentLanguage()->plain(), "inContentLanguage()" );
+               $this->assertSame( 'Accueil', $msg->inLanguage( 'fr' )->plain(), "inLanguage( 'fr' )" );
+       }
+
+       /**
+        * @covers Message::inContentLanguage
+        */
+       public function testInContentLanguageOverride() {
+               $this->setMwGlobals( [
+                       'wgForceUIMsgAsContentMsg' => [ 'mainpage' ],
+               ] );
+               $this->setUserLang( 'fr' );
+
+               // NOTE: make sure internal caching of the message text is reset appropriately.
+               // NOTE: wgForceUIMsgAsContentMsg forces the messages *current* language to be used.
+               $msg = wfMessage( 'mainpage' );
+               $this->assertSame(
+                       'Accueil',
+                       $msg->inContentLanguage()->plain(),
+                       'inContentLanguage() with ForceUIMsg override enabled'
+               );
+               $this->assertSame( 'Main Page', $msg->inLanguage( 'en' )->plain(), "inLanguage( 'en' )" );
+               $this->assertSame(
+                       'Main Page',
+                       $msg->inContentLanguage()->plain(),
+                       'inContentLanguage() with ForceUIMsg override enabled'
+               );
+               $this->assertSame( 'Hauptseite', $msg->inLanguage( 'de' )->plain(), "inLanguage( 'de' )" );
+       }
+
+       /**
+        * @expectedException MWException
+        * @covers Message::inLanguage
+        */
+       public function testInLanguageThrows() {
+               wfMessage( 'foo' )->inLanguage( 123 );
+       }
+
+       /**
+        * @covers Message::serialize
+        * @covers Message::unserialize
+        */
+       public function testSerialization() {
+               $msg = new Message( 'parentheses' );
+               $msg->rawParams( '<a>foo</a>' );
+               $msg->title( Title::newFromText( 'Testing' ) );
+               $this->assertSame( '(<a>foo</a>)', $msg->parse(), 'Sanity check' );
+               $msg = unserialize( serialize( $msg ) );
+               $this->assertSame( '(<a>foo</a>)', $msg->parse() );
+               $title = TestingAccessWrapper::newFromObject( $msg )->title;
+               $this->assertInstanceOf( 'Title', $title );
+               $this->assertSame( 'Testing', $title->getFullText() );
+
+               $msg = new Message( 'mainpage' );
+               $msg->inLanguage( 'de' );
+               $this->assertSame( 'Hauptseite', $msg->plain(), 'Sanity check' );
+               $msg = unserialize( serialize( $msg ) );
+               $this->assertSame( 'Hauptseite', $msg->plain() );
+       }
+
+       /**
+        * @covers Message::newFromSpecifier
+        * @dataProvider provideNewFromSpecifier
+        */
+       public function testNewFromSpecifier( $value, $expectedText ) {
+               $message = Message::newFromSpecifier( $value );
+               $this->assertInstanceOf( Message::class, $message );
+               if ( $value instanceof Message ) {
+                       $this->assertInstanceOf( get_class( $value ), $message );
+                       $this->assertEquals( $value, $message );
+               }
+               $this->assertSame( $expectedText, $message->text() );
+       }
+
+       public function provideNewFromSpecifier() {
+               $messageSpecifier = $this->getMockForAbstractClass( MessageSpecifier::class );
+               $messageSpecifier->expects( $this->any() )->method( 'getKey' )->willReturn( 'mainpage' );
+               $messageSpecifier->expects( $this->any() )->method( 'getParams' )->willReturn( [] );
+
+               return [
+                       'string' => [ 'mainpage', 'Main Page' ],
+                       'array' => [ [ 'youhavenewmessages', 'foo', 'bar' ], 'You have foo (bar).' ],
+                       'Message' => [ new Message( 'youhavenewmessages', [ 'foo', 'bar' ] ), 'You have foo (bar).' ],
+                       'RawMessage' => [ new RawMessage( 'foo ($1)', [ 'bar' ] ), 'foo (bar)' ],
+                       'ApiMessage' => [ new ApiMessage( [ 'mainpage' ], 'code', [ 'data' ] ), 'Main Page' ],
+                       'MessageSpecifier' => [ $messageSpecifier, 'Main Page' ],
+                       'nested RawMessage' => [ [ new RawMessage( 'foo ($1)', [ 'bar' ] ) ], 'foo (bar)' ],
+               ];
+       }
+}