CSSMinTest.php

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<?php
class CSSMinTest extends MediaWikiTestCase {

    protected function setUp() {
        parent::setUp();

        $server = 'http://doc.example.org';

        $this->setMwGlobals( array(
            'wgServer' => $server,
            'wgCanonicalServer' => $server,
        ) );
    }

    public function testMinify( $code, $expectedOutput ) {
        $minified = CSSMin::minify( $code );

        $this->assertEquals( $expectedOutput, $minified, 'Minified output should be in the form expected.' );
    }

    public static function provideMinifyCases() {
        return array(
            // Whitespace
            array( "\r\t\f \v\n\r", "" ),
            array( "foo, bar {\n\tprop: value;\n}", "foo,bar{prop:value}" ),

            // Loose comments
            array( "/* foo */", "" ),
            array( "/*******\n foo\n *******/", "" ),
            array( "/*!\n foo\n */", "" ),

            // Inline comments in various different places
            array( "/* comment */foo, bar {\n\tprop: value;\n}", "foo,bar{prop:value}" ),
            array( "foo/* comment */, bar {\n\tprop: value;\n}", "foo,bar{prop:value}" ),
            array( "foo,/* comment */ bar {\n\tprop: value;\n}", "foo,bar{prop:value}" ),
            array( "foo, bar/* comment */ {\n\tprop: value;\n}", "foo,bar{prop:value}" ),
            array( "foo, bar {\n\t/* comment */prop: value;\n}", "foo,bar{prop:value}" ),
            array( "foo, bar {\n\tprop: /* comment */value;\n}", "foo,bar{prop:value}" ),
            array( "foo, bar {\n\tprop: value /* comment */;\n}", "foo,bar{prop:value }" ),
            array( "foo, bar {\n\tprop: value; /* comment */\n}", "foo,bar{prop:value; }" ),

            // Keep track of things that aren't as minified as much as they
            // could be (bug 35493)
            array( 'foo { prop: value ;}', 'foo{prop:value }' ),
            array( 'foo { prop : value; }', 'foo{prop :value}' ),
            array( 'foo { prop: value ; }', 'foo{prop:value }' ),
            array( 'foo { font-family: "foo" , "bar"; }', 'foo{font-family:"foo" ,"bar"}' ),
            array( "foo { src:\n\turl('foo') ,\n\turl('bar') ; }", "foo{src:url('foo') ,url('bar') }" ),

            // Interesting cases with string values
            // - Double quotes, single quotes
            array( 'foo { content: ""; }', 'foo{content:""}' ),
            array( "foo { content: ''; }", "foo{content:''}" ),
            array( 'foo { content: "\'"; }', 'foo{content:"\'"}' ),
            array( "foo { content: '\"'; }", "foo{content:'\"'}" ),
            // - Whitespace in string values
            array( 'foo { content: " "; }', 'foo{content:" "}' ),
        );
    }

    public function testRemap( $message, $params, $expectedOutput ) {
        $remapped = call_user_func_array( 'CSSMin::remap', $params );

        $messageAdd = " Case: $message";
        $this->assertEquals( $expectedOutput, $remapped, 'CSSMin::remap should return the expected url form.' . $messageAdd );
    }

    public static function provideRemapCases() {
        // Parameter signature:
        // CSSMin::remap( $code, $local, $remote, $embedData = true )
        return array(
            array(
                'Simple case',
                array( 'foo { prop: url(bar.png); }', false, 'http://example.org', false ),
                'foo { prop: url(http://example.org/bar.png); }',
            ),
            array(
                'Without trailing slash',
                array( 'foo { prop: url(../bar.png); }', false, 'http://example.org/quux', false ),
                'foo { prop: url(http://example.org/quux/../bar.png); }',
            ),
            array(
                'With trailing slash on remote (bug 27052)',
                array( 'foo { prop: url(../bar.png); }', false, 'http://example.org/quux/', false ),
                'foo { prop: url(http://example.org/quux/../bar.png); }',
            ),
            array(
                'Guard against stripping double slashes from query',
                array( 'foo { prop: url(bar.png?corge=//grault); }', false, 'http://example.org/quux/', false ),
                'foo { prop: url(http://example.org/quux/bar.png?corge=//grault); }',
            ),
            array(
                'Expand absolute paths',
                array( 'foo { prop: url(/w/skin/images/bar.png); }', false, 'http://example.org/quux', false ),
                'foo { prop: url(http://doc.example.org/w/skin/images/bar.png); }',
            ),
        );
    }

    public function testRemapRemapping( $message, $input, $expectedOutput ) {
        $localPath = __DIR__ . '/../../data/cssmin/';
        $remotePath = 'http://localhost/w/';

        $realOutput = CSSMin::remap( $input, $localPath, $remotePath );

        $this->assertEquals(
            $expectedOutput,
            preg_replace( '/\d+-\d+-\d+T\d+:\d+:\d+Z/', 'timestamp', $realOutput ),
            "CSSMin::remap: $message"
        );
    }

    public static function provideRemapRemappingCases() {
        // red.gif and green.gif are one-pixel 35-byte GIFs.
        // large.png is a 35K PNG that should be non-embeddable.
        // Full paths start with http://localhost/w/.
        // Timestamps in output are replaced with 'timestamp'.

        // data: URIs for red.gif and green.gif
        $red   = 'data:image/gif;base64,R0lGODlhAQABAIAAAP8AADAAACwAAAAAAQABAAACAkQBADs=';
        $green = 'data:image/gif;base64,R0lGODlhAQABAIAAAACAADAAACwAAAAAAQABAAACAkQBADs=';

        return array(
            array(
                'Regular file',
                'foo { background: url(red.gif); }',
                'foo { background: url(http://localhost/w/red.gif?timestamp); }',
            ),
            array(
                'Regular file (missing)',
                'foo { background: url(theColorOfHerHair.gif); }',
                'foo { background: url(http://localhost/w/theColorOfHerHair.gif); }',
            ),
            array(
                'Remote URL',
                'foo { background: url(http://example.org/w/foo.png); }',
                'foo { background: url(http://example.org/w/foo.png); }',
            ),
            array(
                'Protocol-relative remote URL',
                'foo { background: url(//example.org/w/foo.png); }',
                'foo { background: url(//example.org/w/foo.png); }',
            ),
            array(
                'Remote URL with query',
                'foo { background: url(http://example.org/w/foo.png?query=yes); }',
                'foo { background: url(http://example.org/w/foo.png?query=yes); }',
            ),
            array(
                'Protocol-relative remote URL with query',
                'foo { background: url(//example.org/w/foo.png?query=yes); }',
                'foo { background: url(//example.org/w/foo.png?query=yes); }',
            ),
            array(
                'Domain-relative URL',
                'foo { background: url(/static/foo.png); }',
                'foo { background: url(http://doc.example.org/static/foo.png); }',
            ),
            array(
                'Domain-relative URL with query',
                'foo { background: url(/static/foo.png?query=yes); }',
                'foo { background: url(http://doc.example.org/static/foo.png?query=yes); }',
            ),
            array(
                'Remote URL (unnecessary quotes not preserved)',
                'foo { background: url("http://example.org/w/foo.png"); }',
                'foo { background: url(http://example.org/w/foo.png); }',
            ),
            array(
                'Embedded file',
                'foo { /* @embed */ background: url(red.gif); }',
                "foo { background: url($red); background: url(http://localhost/w/red.gif?timestamp)!ie; }",
            ),
            array(
                'Can not embed remote URLs',
                'foo { /* @embed */ background: url(http://example.org/w/foo.png); }',
                'foo { background: url(http://example.org/w/foo.png); }',
            ),
            array(
                'Embedded file (inline @embed)',
                'foo { background: /* @embed */ url(red.gif); }',
                "foo { background: url($red); background: url(http://localhost/w/red.gif?timestamp)!ie; }",
            ),
            array(
                'Can not embed large files',
                'foo { /* @embed */ background: url(large.png); }',
                "foo { background: url(http://localhost/w/large.png?timestamp); }",
            ),
            array(
                'Two regular files in one rule',
                'foo { background: url(red.gif), url(green.gif); }',
                'foo { background: url(http://localhost/w/red.gif?timestamp), url(http://localhost/w/green.gif?timestamp); }',
            ),
            array(
                'Two embedded files in one rule',
                'foo { /* @embed */ background: url(red.gif), url(green.gif); }',
                "foo { background: url($red), url($green); background: url(http://localhost/w/red.gif?timestamp), url(http://localhost/w/green.gif?timestamp)!ie; }",
            ),
            array(
                'Two embedded files in one rule (inline @embed)',
                'foo { background: /* @embed */ url(red.gif), /* @embed */ url(green.gif); }',
                "foo { background: url($red), url($green); background: url(http://localhost/w/red.gif?timestamp), url(http://localhost/w/green.gif?timestamp)!ie; }",
            ),
            array(
                'Two embedded files in one rule (inline @embed), one too large',
                'foo { background: /* @embed */ url(red.gif), /* @embed */ url(large.png); }',
                "foo { background: url($red), url(http://localhost/w/large.png?timestamp); background: url(http://localhost/w/red.gif?timestamp), url(http://localhost/w/large.png?timestamp)!ie; }",
            ),
            array(
                'Practical example with some noise',
                'foo { /* @embed */ background: #f9f9f9 url(red.gif) 0 0 no-repeat; }',
                "foo { background: #f9f9f9 url($red) 0 0 no-repeat; background: #f9f9f9 url(http://localhost/w/red.gif?timestamp) 0 0 no-repeat!ie; }",
            ),
            array(
                'Does not mess with other properties',
                'foo { color: red; background: url(red.gif); font-size: small; }',
                'foo { color: red; background: url(http://localhost/w/red.gif?timestamp); font-size: small; }',
            ),
            array(
                'Spacing and miscellanea not changed (1)',
                'foo {   background:    url(red.gif);  }',
                'foo {   background:    url(http://localhost/w/red.gif?timestamp);  }',
            ),
            array(
                'Spacing and miscellanea not changed (2)',
                'foo {background:url(red.gif)}',
                'foo {background:url(http://localhost/w/red.gif?timestamp)}',
            ),
            array(
                'Spaces within url() parentheses are ignored',
                'foo { background: url( red.gif ); }',
                'foo { background: url(http://localhost/w/red.gif?timestamp); }',
            ),
            array(
                '@import rule to local file (should we remap this?)',
                '@import url(/styles.css)',
                '@import url(http://doc.example.org/styles.css)',
            ),
            array(
                '@import rule to URL (should we remap this?)',
                '@import url(//localhost/styles.css?query=yes)',
                '@import url(//localhost/styles.css?query=yes)',
            ),
        );
    }

    public function testBuildUrlValue( $message, $input, $expectedOutput ) {
        $this->assertEquals(
            $expectedOutput,
            CSSMin::buildUrlValue( $input ),
            "CSSMin::buildUrlValue: $message"
        );
    }

    public static function provideBuildUrlValueCases() {
        return array(
            array(
                'Full URL',
                'scheme://user@domain:port/~user/fi%20le.png?query=yes&really=y+s',
                'url(scheme://user@domain:port/~user/fi%20le.png?query=yes&really=y+s)',
            ),
            array(
                'data: URI',
                'data:image/png;base64,R0lGODlh/+==',
                'url(data:image/png;base64,R0lGODlh/+==)',
            ),
            array(
                'URL with quotes',
                "https://en.wikipedia.org/wiki/Wendy's",
                "url(\"https://en.wikipedia.org/wiki/Wendy's\")",
            ),
            array(
                'URL with parentheses',
                'https://en.wikipedia.org/wiki/Boston_(band)',
                'url("https://en.wikipedia.org/wiki/Boston_(band)")',
            ),
        );
    }

    public function testMinifyWithCSSStringValues( $code, $expectedOutput ) {
        $this->testMinifyOutput( $code, $expectedOutput );
    }

    public static function provideStringCases() {
        return array(
            // String values should be respected
            // - More than one space in a string value
            array( 'foo { content: "  "; }', 'foo{content:"  "}' ),
            // - Using a tab in a string value (turns into a space)
            array( "foo { content: '\t'; }", "foo{content:'\t'}" ),
            // - Using css-like syntax in string values
            array( 'foo::after { content: "{;}"; position: absolute; }', 'foo::after{content:"{;}";position:absolute}' ),
        );
    }
}