HtmlTest.php

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<?php
class HtmlTest extends MediaWikiTestCase {

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

        $this->setMwGlobals( [
            'wgUseMediaWikiUIEverywhere' => false,
        ] );

        $langObj = Language::factory( 'en' );

        // Hardcode namespaces during test runs,
        // so that html output based on existing namespaces
        // can be properly evaluated.
        $langObj->setNamespaces( [
            -2 => 'Media',
            -1 => 'Special',
            0 => '',
            1 => 'Talk',
            2 => 'User',
            3 => 'User_talk',
            4 => 'MyWiki',
            5 => 'MyWiki_Talk',
            6 => 'File',
            7 => 'File_talk',
            8 => 'MediaWiki',
            9 => 'MediaWiki_talk',
            10 => 'Template',
            11 => 'Template_talk',
            14 => 'Category',
            15 => 'Category_talk',
            100 => 'Custom',
            101 => 'Custom_talk',
        ] );
        $this->setUserLang( $langObj );
        $this->setContentLang( $langObj );
    }

    public function testElementBasics() {
        $this->assertEquals(
            '<img/>',
            Html::element( 'img', null, '' ),
            'Self-closing tag for short-tag elements'
        );

        $this->assertEquals(
            '<element></element>',
            Html::element( 'element', null, null ),
            'Close tag for empty element (null, null)'
        );

        $this->assertEquals(
            '<element></element>',
            Html::element( 'element', [], '' ),
            'Close tag for empty element (array, string)'
        );
    }

    public function dataXmlMimeType() {
        return [
            // ( $mimetype, $isXmlMimeType )
            # HTML is not an XML MimeType
            [ 'text/html', false ],
            # XML is an XML MimeType
            [ 'text/xml', true ],
            [ 'application/xml', true ],
            # XHTML is an XML MimeType
            [ 'application/xhtml+xml', true ],
            # Make sure other +xml MimeTypes are supported
            # SVG is another random MimeType even though we don't use it
            [ 'image/svg+xml', true ],
            # Complete random other MimeTypes are not XML
            [ 'text/plain', false ],
        ];
    }

    public function testXmlMimeType( $mimetype, $isXmlMimeType ) {
        $this->assertEquals( $isXmlMimeType, Html::isXmlMimeType( $mimetype ) );
    }

    public function testExpandAttributesSkipsNullAndFalse() {

        # ## EMPTY ########
        $this->assertEmpty(
            Html::expandAttributes( [ 'foo' => null ] ),
            'skip keys with null value'
        );
        $this->assertEmpty(
            Html::expandAttributes( [ 'foo' => false ] ),
            'skip keys with false value'
        );
        $this->assertEquals(
            ' foo=""',
            Html::expandAttributes( [ 'foo' => '' ] ),
            'keep keys with an empty string'
        );
    }

    public function testExpandAttributesForBooleans() {
        $this->assertEquals(
            '',
            Html::expandAttributes( [ 'selected' => false ] ),
            'Boolean attributes do not generates output when value is false'
        );
        $this->assertEquals(
            '',
            Html::expandAttributes( [ 'selected' => null ] ),
            'Boolean attributes do not generates output when value is null'
        );

        $this->assertEquals(
            ' selected=""',
            Html::expandAttributes( [ 'selected' => true ] ),
            'Boolean attributes have no value when value is true'
        );
        $this->assertEquals(
            ' selected=""',
            Html::expandAttributes( [ 'selected' ] ),
            'Boolean attributes have no value when value is true (passed as numerical array)'
        );
    }

    public function testExpandAttributesForNumbers() {
        $this->assertEquals(
            ' value="1"',
            Html::expandAttributes( [ 'value' => 1 ] ),
            'Integer value is cast to a string'
        );
        $this->assertEquals(
            ' value="1.1"',
            Html::expandAttributes( [ 'value' => 1.1 ] ),
            'Float value is cast to a string'
        );
    }

    public function testExpandAttributesForObjects() {
        $this->assertEquals(
            ' value="stringValue"',
            Html::expandAttributes( [ 'value' => new HtmlTestValue() ] ),
            'Object value is converted to a string'
        );
    }

    public function testExpandAttributesVariousExpansions() {
        # ## NOT EMPTY ####
        $this->assertEquals(
            ' empty_string=""',
            Html::expandAttributes( [ 'empty_string' => '' ] ),
            'Empty string is always quoted'
        );
        $this->assertEquals(
            ' key="value"',
            Html::expandAttributes( [ 'key' => 'value' ] ),
            'Simple string value needs no quotes'
        );
        $this->assertEquals(
            ' one="1"',
            Html::expandAttributes( [ 'one' => 1 ] ),
            'Number 1 value needs no quotes'
        );
        $this->assertEquals(
            ' zero="0"',
            Html::expandAttributes( [ 'zero' => 0 ] ),
            'Number 0 value needs no quotes'
        );

    }

    public function testExpandAttributesListValueAttributes() {
        # ## STRING VALUES
        $this->assertEquals(
            ' class="redundant spaces here"',
            Html::expandAttributes( [ 'class' => ' redundant  spaces  here  ' ] ),
            'Normalization should strip redundant spaces'
        );
        $this->assertEquals(
            ' class="foo bar"',
            Html::expandAttributes( [ 'class' => 'foo bar foo bar bar' ] ),
            'Normalization should remove duplicates in string-lists'
        );
        # ## "EMPTY" ARRAY VALUES
        $this->assertEquals(
            ' class=""',
            Html::expandAttributes( [ 'class' => [] ] ),
            'Value with an empty array'
        );
        $this->assertEquals(
            ' class=""',
            Html::expandAttributes( [ 'class' => [ null, '', ' ', '  ' ] ] ),
            'Array with null, empty string and spaces'
        );
        # ## NON-EMPTY ARRAY VALUES
        $this->assertEquals(
            ' class="foo bar"',
            Html::expandAttributes( [ 'class' => [
                'foo',
                'bar',
                'foo',
                'bar',
                'bar',
            ] ] ),
            'Normalization should remove duplicates in the array'
        );
        $this->assertEquals(
            ' class="foo bar"',
            Html::expandAttributes( [ 'class' => [
                'foo bar',
                'bar foo',
                'foo',
                'bar bar',
            ] ] ),
            'Normalization should remove duplicates in string-lists in the array'
        );
    }

    public function testExpandAttributesSpaceSeparatedAttributesWithBoolean() {
        $this->assertEquals(
            ' class="booltrue one"',
            Html::expandAttributes( [ 'class' => [
                'booltrue' => true,
                'one' => 1,

                # Method use isset() internally, make sure we do discard
                # attributes values which have been assigned well known values
                'emptystring' => '',
                'boolfalse' => false,
                'zero' => 0,
                'null' => null,
            ] ] )
        );
    }

    public function testValueIsAuthoritativeInSpaceSeparatedAttributesArrays() {
        $this->assertEquals(
            ' class=""',
            Html::expandAttributes( [ 'class' => [
                'GREEN',
                'GREEN' => false,
                'GREEN',
            ] ] )
        );
    }

    public function testExpandAttributes_ArrayOnNonListValueAttribute_ThrowsException() {
        // Real-life test case found in the Popups extension (see Gerrit cf0fd64),
        // when used with an outdated BetaFeatures extension (see Gerrit deda1e7)
        Html::expandAttributes( [
            'src' => [
                'ltr' => 'ltr.svg',
                'rtl' => 'rtl.svg'
            ]
        ] );
    }

    public function testNamespaceSelector() {
        $this->assertEquals(
            '<select id="namespace" name="namespace">' . "\n" .
                '<option value="0">(Main)</option>' . "\n" .
                '<option value="1">Talk</option>' . "\n" .
                '<option value="2">User</option>' . "\n" .
                '<option value="3">User talk</option>' . "\n" .
                '<option value="4">MyWiki</option>' . "\n" .
                '<option value="5">MyWiki Talk</option>' . "\n" .
                '<option value="6">File</option>' . "\n" .
                '<option value="7">File talk</option>' . "\n" .
                '<option value="8">MediaWiki</option>' . "\n" .
                '<option value="9">MediaWiki talk</option>' . "\n" .
                '<option value="10">Template</option>' . "\n" .
                '<option value="11">Template talk</option>' . "\n" .
                '<option value="14">Category</option>' . "\n" .
                '<option value="15">Category talk</option>' . "\n" .
                '<option value="100">Custom</option>' . "\n" .
                '<option value="101">Custom talk</option>' . "\n" .
                '</select>',
            Html::namespaceSelector(),
            'Basic namespace selector without custom options'
        );

        $this->assertEquals(
            '<label for="mw-test-namespace">Select a namespace:</label>&#160;' .
                '<select id="mw-test-namespace" name="wpNamespace">' . "\n" .
                '<option value="all">all</option>' . "\n" .
                '<option value="0">(Main)</option>' . "\n" .
                '<option value="1">Talk</option>' . "\n" .
                '<option value="2" selected="">User</option>' . "\n" .
                '<option value="3">User talk</option>' . "\n" .
                '<option value="4">MyWiki</option>' . "\n" .
                '<option value="5">MyWiki Talk</option>' . "\n" .
                '<option value="6">File</option>' . "\n" .
                '<option value="7">File talk</option>' . "\n" .
                '<option value="8">MediaWiki</option>' . "\n" .
                '<option value="9">MediaWiki talk</option>' . "\n" .
                '<option value="10">Template</option>' . "\n" .
                '<option value="11">Template talk</option>' . "\n" .
                '<option value="14">Category</option>' . "\n" .
                '<option value="15">Category talk</option>' . "\n" .
                '<option value="100">Custom</option>' . "\n" .
                '<option value="101">Custom talk</option>' . "\n" .
                '</select>',
            Html::namespaceSelector(
                [ 'selected' => '2', 'all' => 'all', 'label' => 'Select a namespace:' ],
                [ 'name' => 'wpNamespace', 'id' => 'mw-test-namespace' ]
            ),
            'Basic namespace selector with custom values'
        );

        $this->assertEquals(
            '<label for="namespace">Select a namespace:</label>&#160;' .
                '<select id="namespace" name="namespace">' . "\n" .
                '<option value="0">(Main)</option>' . "\n" .
                '<option value="1">Talk</option>' . "\n" .
                '<option value="2">User</option>' . "\n" .
                '<option value="3">User talk</option>' . "\n" .
                '<option value="4">MyWiki</option>' . "\n" .
                '<option value="5">MyWiki Talk</option>' . "\n" .
                '<option value="6">File</option>' . "\n" .
                '<option value="7">File talk</option>' . "\n" .
                '<option value="8">MediaWiki</option>' . "\n" .
                '<option value="9">MediaWiki talk</option>' . "\n" .
                '<option value="10">Template</option>' . "\n" .
                '<option value="11">Template talk</option>' . "\n" .
                '<option value="14">Category</option>' . "\n" .
                '<option value="15">Category talk</option>' . "\n" .
                '<option value="100">Custom</option>' . "\n" .
                '<option value="101">Custom talk</option>' . "\n" .
                '</select>',
            Html::namespaceSelector(
                [ 'label' => 'Select a namespace:' ]
            ),
            'Basic namespace selector with a custom label but no id attribtue for the <select>'
        );
    }

    public function testCanFilterOutNamespaces() {
        $this->assertEquals(
            '<select id="namespace" name="namespace">' . "\n" .
                '<option value="2">User</option>' . "\n" .
                '<option value="4">MyWiki</option>' . "\n" .
                '<option value="5">MyWiki Talk</option>' . "\n" .
                '<option value="6">File</option>' . "\n" .
                '<option value="7">File talk</option>' . "\n" .
                '<option value="8">MediaWiki</option>' . "\n" .
                '<option value="9">MediaWiki talk</option>' . "\n" .
                '<option value="10">Template</option>' . "\n" .
                '<option value="11">Template talk</option>' . "\n" .
                '<option value="14">Category</option>' . "\n" .
                '<option value="15">Category talk</option>' . "\n" .
                '</select>',
            Html::namespaceSelector(
                [ 'exclude' => [ 0, 1, 3, 100, 101 ] ]
            ),
            'Namespace selector namespace filtering.'
        );
    }

    public function testCanDisableANamespaces() {
        $this->assertEquals(
            '<select id="namespace" name="namespace">' . "\n" .
                '<option disabled="" value="0">(Main)</option>' . "\n" .
                '<option disabled="" value="1">Talk</option>' . "\n" .
                '<option disabled="" value="2">User</option>' . "\n" .
                '<option disabled="" value="3">User talk</option>' . "\n" .
                '<option disabled="" value="4">MyWiki</option>' . "\n" .
                '<option value="5">MyWiki Talk</option>' . "\n" .
                '<option value="6">File</option>' . "\n" .
                '<option value="7">File talk</option>' . "\n" .
                '<option value="8">MediaWiki</option>' . "\n" .
                '<option value="9">MediaWiki talk</option>' . "\n" .
                '<option value="10">Template</option>' . "\n" .
                '<option value="11">Template talk</option>' . "\n" .
                '<option value="14">Category</option>' . "\n" .
                '<option value="15">Category talk</option>' . "\n" .
                '<option value="100">Custom</option>' . "\n" .
                '<option value="101">Custom talk</option>' . "\n" .
                '</select>',
            Html::namespaceSelector( [
                'disable' => [ 0, 1, 2, 3, 4 ]
            ] ),
            'Namespace selector namespace disabling'
        );
    }

    public function testHtmlElementAcceptsNewHtml5TypesInHtml5Mode( $HTML5InputType ) {
        $this->assertEquals(
            '<input type="' . $HTML5InputType . '"/>',
            Html::element( 'input', [ 'type' => $HTML5InputType ] ),
            'In HTML5, Html::element() should accept type="' . $HTML5InputType . '"'
        );
    }

    public static function provideHtml5InputTypes() {
        $types = [
            'datetime',
            'datetime-local',
            'date',
            'month',
            'time',
            'week',
            'number',
            'range',
            'email',
            'url',
            'search',
            'tel',
            'color',
        ];
        $cases = [];
        foreach ( $types as $type ) {
            $cases[] = [ $type ];
        }

        return $cases;
    }

    public function testDropDefaults( $expected, $element, $attribs, $message = '' ) {
        $this->assertEquals( $expected, Html::element( $element, $attribs ), $message );
    }

    public static function provideElementsWithAttributesHavingDefaultValues() {
        # Use cases in a concise format:
        # <expected>, <element name>, <array of attributes> [, <message>]
        # Will be mapped to Html::element()
        $cases = [];

        # ## Generic cases, match $attribDefault static array
        $cases[] = [ '<area/>',
            'area', [ 'shape' => 'rect' ]
        ];

        $cases[] = [ '<button type="submit"></button>',
            'button', [ 'formaction' => 'GET' ]
        ];
        $cases[] = [ '<button type="submit"></button>',
            'button', [ 'formenctype' => 'application/x-www-form-urlencoded' ]
        ];

        $cases[] = [ '<canvas></canvas>',
            'canvas', [ 'height' => '150' ]
        ];
        $cases[] = [ '<canvas></canvas>',
            'canvas', [ 'width' => '300' ]
        ];
        # Also check with numeric values
        $cases[] = [ '<canvas></canvas>',
            'canvas', [ 'height' => 150 ]
        ];
        $cases[] = [ '<canvas></canvas>',
            'canvas', [ 'width' => 300 ]
        ];

        $cases[] = [ '<form></form>',
            'form', [ 'action' => 'GET' ]
        ];
        $cases[] = [ '<form></form>',
            'form', [ 'autocomplete' => 'on' ]
        ];
        $cases[] = [ '<form></form>',
            'form', [ 'enctype' => 'application/x-www-form-urlencoded' ]
        ];

        $cases[] = [ '<input/>',
            'input', [ 'formaction' => 'GET' ]
        ];
        $cases[] = [ '<input/>',
            'input', [ 'type' => 'text' ]
        ];

        $cases[] = [ '<keygen/>',
            'keygen', [ 'keytype' => 'rsa' ]
        ];

        $cases[] = [ '<link/>',
            'link', [ 'media' => 'all' ]
        ];

        $cases[] = [ '<menu></menu>',
            'menu', [ 'type' => 'list' ]
        ];

        $cases[] = [ '<script></script>',
            'script', [ 'type' => 'text/javascript' ]
        ];

        $cases[] = [ '<style></style>',
            'style', [ 'media' => 'all' ]
        ];
        $cases[] = [ '<style></style>',
            'style', [ 'type' => 'text/css' ]
        ];

        $cases[] = [ '<textarea></textarea>',
            'textarea', [ 'wrap' => 'soft' ]
        ];

        # ## SPECIFIC CASES

        # <link type="text/css">
        $cases[] = [ '<link/>',
            'link', [ 'type' => 'text/css' ]
        ];

        # <input> specific handling
        $cases[] = [ '<input type="checkbox"/>',
            'input', [ 'type' => 'checkbox', 'value' => 'on' ],
            'Default value "on" is stripped of checkboxes',
        ];
        $cases[] = [ '<input type="radio"/>',
            'input', [ 'type' => 'radio', 'value' => 'on' ],
            'Default value "on" is stripped of radio buttons',
        ];
        $cases[] = [ '<input type="submit" value="Submit"/>',
            'input', [ 'type' => 'submit', 'value' => 'Submit' ],
            'Default value "Submit" is kept on submit buttons (for possible l10n issues)',
        ];
        $cases[] = [ '<input type="color"/>',
            'input', [ 'type' => 'color', 'value' => '' ],
        ];
        $cases[] = [ '<input type="range"/>',
            'input', [ 'type' => 'range', 'value' => '' ],
        ];

        # <button> specific handling
        # see remarks on http://msdn.microsoft.com/en-us/library/ie/ms535211%28v=vs.85%29.aspx
        $cases[] = [ '<button type="submit"></button>',
            'button', [ 'type' => 'submit' ],
            'According to standard the default type is "submit". '
                . 'Depending on compatibility mode IE might use "button", instead.',
        ];

        # <select> specific handling
        $cases[] = [ '<select multiple=""></select>',
            'select', [ 'size' => '4', 'multiple' => true ],
        ];
        # .. with numeric value
        $cases[] = [ '<select multiple=""></select>',
            'select', [ 'size' => 4, 'multiple' => true ],
        ];
        $cases[] = [ '<select></select>',
            'select', [ 'size' => '1', 'multiple' => false ],
        ];
        # .. with numeric value
        $cases[] = [ '<select></select>',
            'select', [ 'size' => 1, 'multiple' => false ],
        ];

        # Passing an array as value
        $cases[] = [ '<a class="css-class-one css-class-two"></a>',
            'a', [ 'class' => [ 'css-class-one', 'css-class-two' ] ],
            "dropDefaults accepts values given as an array"
        ];

        # FIXME: doDropDefault should remove defaults given in an array
        # Expected should be '<a></a>'
        $cases[] = [ '<a class=""></a>',
            'a', [ 'class' => [ '', '' ] ],
            "dropDefaults accepts values given as an array"
        ];

        # Craft the Html elements
        $ret = [];
        foreach ( $cases as $case ) {
            $ret[] = [
                $case[0],
                $case[1], $case[2],
                isset( $case[3] ) ? $case[3] : ''
            ];
        }

        return $ret;
    }

    public function testFormValidationBlacklist() {
        $this->assertEmpty(
            Html::expandAttributes( [
                'min' => 1,
                'max' => 100,
                'pattern' => 'abc',
                'required' => true,
                'step' => 2
            ] ),
            'Blacklist form validation attributes.'
        );
        $this->assertEquals(
            ' step="any"',
            Html::expandAttributes(
                [
                    'min' => 1,
                    'max' => 100,
                    'pattern' => 'abc',
                    'required' => true,
                    'step' => 'any'
                ],
                'Allow special case "step=any".'
            )
        );
    }

    public function testWrapperInput() {
        $this->assertEquals(
            '<input type="radio" value="testval" name="testname"/>',
            Html::input( 'testname', 'testval', 'radio' ),
            'Input wrapper with type and value.'
        );
        $this->assertEquals(
            '<input name="testname"/>',
            Html::input( 'testname' ),
            'Input wrapper with all default values.'
        );
    }

    public function testWrapperCheck() {
        $this->assertEquals(
            '<input type="checkbox" value="1" name="testname"/>',
            Html::check( 'testname' ),
            'Checkbox wrapper unchecked.'
        );
        $this->assertEquals(
            '<input checked="" type="checkbox" value="1" name="testname"/>',
            Html::check( 'testname', true ),
            'Checkbox wrapper checked.'
        );
        $this->assertEquals(
            '<input type="checkbox" value="testval" name="testname"/>',
            Html::check( 'testname', false, [ 'value' => 'testval' ] ),
            'Checkbox wrapper with a value override.'
        );
    }

    public function testWrapperRadio() {
        $this->assertEquals(
            '<input type="radio" value="1" name="testname"/>',
            Html::radio( 'testname' ),
            'Radio wrapper unchecked.'
        );
        $this->assertEquals(
            '<input checked="" type="radio" value="1" name="testname"/>',
            Html::radio( 'testname', true ),
            'Radio wrapper checked.'
        );
        $this->assertEquals(
            '<input type="radio" value="testval" name="testname"/>',
            Html::radio( 'testname', false, [ 'value' => 'testval' ] ),
            'Radio wrapper with a value override.'
        );
    }

    public function testWrapperLabel() {
        $this->assertEquals(
            '<label for="testid">testlabel</label>',
            Html::label( 'testlabel', 'testid' ),
            'Label wrapper'
        );
    }

    public static function provideSrcSetImages() {
        return [
            [ [], '', 'when there are no images, return empty string' ],
            [
                [ '1x' => '1x.png', '1.5x' => '1_5x.png', '2x' => '2x.png' ],
                '1x.png 1x, 1_5x.png 1.5x, 2x.png 2x',
                'pixel depth keys may include a trailing "x"'
            ],
            [
                [ '1'  => '1x.png', '1.5' => '1_5x.png', '2'  => '2x.png' ],
                '1x.png 1x, 1_5x.png 1.5x, 2x.png 2x',
                'pixel depth keys may omit a trailing "x"'
            ],
            [
                [ '1'  => 'small.png', '1.5' => 'large.png', '2'  => 'large.png' ],
                'small.png 1x, large.png 1.5x',
                'omit larger duplicates'
            ],
            [
                [ '1'  => 'small.png', '2'  => 'large.png', '1.5' => 'large.png' ],
                'small.png 1x, large.png 1.5x',
                'omit larger duplicates in irregular order'
            ],
        ];
    }

    public function testSrcSet( $images, $expected, $message ) {
        $this->assertEquals( Html::srcSet( $images ), $expected, $message );
    }
}

class HtmlTestValue {
    function __toString() {
        return 'stringValue';
    }
}