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✏️ Editing: EmulativeTest.php

<?php declare(strict_types=1);

namespace PhpParser\Lexer;

use PhpParser\ErrorHandler;
use PhpParser\Lexer;
use PhpParser\LexerTest;
use PhpParser\Parser\Php7;
use PhpParser\PhpVersion;
use PhpParser\Token;

require __DIR__ . '/../../../lib/PhpParser/compatibility_tokens.php';

class EmulativeTest extends LexerTest {
    protected function getLexer() {
        return new Emulative();
    }

/**
     * @dataProvider provideTestReplaceKeywords
     */
    public function testReplaceKeywords(string $keyword, int $expectedToken): void {
        $lexer = $this->getLexer();
        $code = '<?php ' . $keyword;
        $this->assertEquals([
            new Token(\T_OPEN_TAG, '<?php ', 1, 0),
            new Token($expectedToken, $keyword, 1, 6),
            new Token(0, "\0", 1, \strlen($code)),
        ], $lexer->tokenize($code));
    }

/**
     * @dataProvider provideTestReplaceKeywords
     */
    public function testReplaceKeywordsUppercase(string $keyword, int $expectedToken): void {
        $lexer = $this->getLexer();
        $code = '<?php ' . strtoupper($keyword);

$this->assertEquals([
            new Token(\T_OPEN_TAG, '<?php ', 1, 0),
            new Token($expectedToken, \strtoupper($keyword), 1, 6),
            new Token(0, "\0", 1, \strlen($code)),
        ], $lexer->tokenize($code));
    }

/**
     * @dataProvider provideTestReplaceKeywords
     */
    public function testNoReplaceKeywordsAfterObjectOperator(string $keyword): void {
        $lexer = $this->getLexer();
        $code = '<?php ->' . $keyword;

$this->assertEquals([
            new Token(\T_OPEN_TAG, '<?php ', 1, 0),
            new Token(\T_OBJECT_OPERATOR, '->', 1, 6),
            new Token(\T_STRING, $keyword, 1, 8),
            new Token(0, "\0", 1, \strlen($code)),
        ], $lexer->tokenize($code));
    }

/**
     * @dataProvider provideTestReplaceKeywords
     */
    public function testNoReplaceKeywordsAfterObjectOperatorWithSpaces(string $keyword): void {
        $lexer = $this->getLexer();
        $code = '<?php ->    ' . $keyword;

$this->assertEquals([
            new Token(\T_OPEN_TAG, '<?php ', 1, 0),
            new Token(\T_OBJECT_OPERATOR, '->', 1, 6),
            new Token(\T_WHITESPACE, '    ', 1, 8),
            new Token(\T_STRING, $keyword, 1, 12),
            new Token(0, "\0", 1, \strlen($code)),
        ], $lexer->tokenize($code));
    }

/**
     * @dataProvider provideTestReplaceKeywords
     */
    public function testNoReplaceKeywordsAfterNullsafeObjectOperator(string $keyword): void {
        $lexer = $this->getLexer();
        $code = '<?php ?->' . $keyword;

$this->assertEquals([
            new Token(\T_OPEN_TAG, '<?php ', 1, 0),
            new Token(\T_NULLSAFE_OBJECT_OPERATOR, '?->', 1, 6),
            new Token(\T_STRING, $keyword, 1, 9),
            new Token(0, "\0", 1, \strlen($code)),
        ], $lexer->tokenize($code));
    }

public static function provideTestReplaceKeywords() {
        return [
            // PHP 8.4
            ['__PROPERTY__', \T_PROPERTY_C],

// PHP 8.0
            ['match',         \T_MATCH],

// PHP 7.4
            ['fn',            \T_FN],

// PHP 5.5
            ['finally',       \T_FINALLY],
            ['yield',         \T_YIELD],

// PHP 5.4
            ['callable',      \T_CALLABLE],
            ['insteadof',     \T_INSTEADOF],
            ['trait',         \T_TRAIT],
            ['__TRAIT__',     \T_TRAIT_C],

// PHP 5.3
            ['__DIR__',       \T_DIR],
            ['goto',          \T_GOTO],
            ['namespace',     \T_NAMESPACE],
            ['__NAMESPACE__', \T_NS_C],
        ];
    }

private function assertSameTokens(array $expectedTokens, array $tokens): void {
        $reducedTokens = [];
        foreach ($tokens as $token) {
            if ($token->id === 0 || $token->isIgnorable()) {
                continue;
            }
            $reducedTokens[] = [$token->id, $token->text];
        }
        $this->assertSame($expectedTokens, $reducedTokens);
    }

/**
     * @dataProvider provideTestLexNewFeatures
     */
    public function testLexNewFeatures(string $code, array $expectedTokens): void {
        $lexer = $this->getLexer();
        $this->assertSameTokens($expectedTokens, $lexer->tokenize('<?php ' . $code));
    }

/**
     * @dataProvider provideTestLexNewFeatures
     */
    public function testLeaveStuffAloneInStrings(string $code): void {
        $stringifiedToken = '"' . addcslashes($code, '"\\') . '"';

$lexer = $this->getLexer();
        $fullCode = '<?php ' . $stringifiedToken;

$this->assertEquals([
            new Token(\T_OPEN_TAG, '<?php ', 1, 0),
            new Token(\T_CONSTANT_ENCAPSED_STRING, $stringifiedToken, 1, 6),
            new Token(0, "\0", \substr_count($fullCode, "\n") + 1, \strlen($fullCode)),
        ], $lexer->tokenize($fullCode));
    }

/**
     * @dataProvider provideTestLexNewFeatures
     */
    public function testErrorAfterEmulation($code): void {
        $errorHandler = new ErrorHandler\Collecting();
        $lexer = $this->getLexer();
        $lexer->tokenize('<?php ' . $code . "\0", $errorHandler);

$errors = $errorHandler->getErrors();
        $this->assertCount(1, $errors);

$error = $errors[0];
        $this->assertSame('Unexpected null byte', $error->getRawMessage());

$attrs = $error->getAttributes();
        $expPos = strlen('<?php ' . $code);
        $expLine = 1 + substr_count('<?php ' . $code, "\n");
        $this->assertSame($expPos, $attrs['startFilePos']);
        $this->assertSame($expPos, $attrs['endFilePos']);
        $this->assertSame($expLine, $attrs['startLine']);
        $this->assertSame($expLine, $attrs['endLine']);
    }

public static function provideTestLexNewFeatures() {
        return [
            ['yield from', [
                [\T_YIELD_FROM, 'yield from'],
            ]],
            ["yield\r\nfrom", [
                [\T_YIELD_FROM, "yield\r\nfrom"],
            ]],
            ['...', [
                [\T_ELLIPSIS, '...'],
            ]],
            ['**', [
                [\T_POW, '**'],
            ]],
            ['**=', [
                [\T_POW_EQUAL, '**='],
            ]],
            ['??', [
                [\T_COALESCE, '??'],
            ]],
            ['<=>', [
                [\T_SPACESHIP, '<=>'],
            ]],
            ['0b1010110', [
                [\T_LNUMBER, '0b1010110'],
            ]],
            ['0b1011010101001010110101010010101011010101010101101011001110111100', [
                [\T_DNUMBER, '0b1011010101001010110101010010101011010101010101101011001110111100'],
            ]],
            ['\\', [
                [\T_NS_SEPARATOR, '\\'],
            ]],
            ["<<<'NOWDOC'\nNOWDOC;\n", [
                [\T_START_HEREDOC, "<<<'NOWDOC'\n"],
                [\T_END_HEREDOC, 'NOWDOC'],
                [ord(';'), ';'],
            ]],
            ["<<<'NOWDOC'\nFoobar\nNOWDOC;\n", [
                [\T_START_HEREDOC, "<<<'NOWDOC'\n"],
                [\T_ENCAPSED_AND_WHITESPACE, "Foobar\n"],
                [\T_END_HEREDOC, 'NOWDOC'],
                [ord(';'), ';'],
            ]],

// PHP 7.3: Flexible heredoc/nowdoc
            ["<<<LABEL\nLABEL,", [
                [\T_START_HEREDOC, "<<<LABEL\n"],
                [\T_END_HEREDOC, "LABEL"],
                [ord(','), ','],
            ]],
            ["<<<LABEL\n    LABEL,", [
                [\T_START_HEREDOC, "<<<LABEL\n"],
                [\T_END_HEREDOC, "    LABEL"],
                [ord(','), ','],
            ]],
            ["<<<LABEL\n    Foo\n  LABEL;", [
                [\T_START_HEREDOC, "<<<LABEL\n"],
                [\T_ENCAPSED_AND_WHITESPACE, "    Foo\n"],
                [\T_END_HEREDOC, "  LABEL"],
                [ord(';'), ';'],
            ]],
            ["<<<A\n A,<<<A\n A,", [
                [\T_START_HEREDOC, "<<<A\n"],
                [\T_END_HEREDOC, " A"],
                [ord(','), ','],
                [\T_START_HEREDOC, "<<<A\n"],
                [\T_END_HEREDOC, " A"],
                [ord(','), ','],
            ]],
            ["<<<LABEL\nLABELNOPE\nLABEL\n", [
                [\T_START_HEREDOC, "<<<LABEL\n"],
                [\T_ENCAPSED_AND_WHITESPACE, "LABELNOPE\n"],
                [\T_END_HEREDOC, "LABEL"],
            ]],
            // Interpretation changed
            ["<<<LABEL\n    LABEL\nLABEL\n", [
                [\T_START_HEREDOC, "<<<LABEL\n"],
                [\T_END_HEREDOC, "    LABEL"],
                [\T_STRING, "LABEL"],
            ]],

// PHP 7.4: Null coalesce equal
            ['??=', [
                [\T_COALESCE_EQUAL, '??='],
            ]],

// PHP 7.4: Number literal separator
            ['1_000', [
                [\T_LNUMBER, '1_000'],
            ]],
            ['0x7AFE_F00D', [
                [\T_LNUMBER, '0x7AFE_F00D'],
            ]],
            ['0b0101_1111', [
                [\T_LNUMBER, '0b0101_1111'],
            ]],
            ['0137_041', [
                [\T_LNUMBER, '0137_041'],
            ]],
            ['1_000.0', [
                [\T_DNUMBER, '1_000.0'],
            ]],
            ['1_0.0', [
                [\T_DNUMBER, '1_0.0']
            ]],
            ['1_000_000_000.0', [
                [\T_DNUMBER, '1_000_000_000.0']
            ]],
            ['0e1_0', [
                [\T_DNUMBER, '0e1_0']
            ]],
            ['1_0e+10', [
                [\T_DNUMBER, '1_0e+10']
            ]],
            ['1_0e-10', [
                [\T_DNUMBER, '1_0e-10']
            ]],
            ['0b1011010101001010_110101010010_10101101010101_0101101011001_110111100', [
                [\T_DNUMBER, '0b1011010101001010_110101010010_10101101010101_0101101011001_110111100'],
            ]],
            ['0xFFFF_FFFF_FFFF_FFFF', [
                [\T_DNUMBER, '0xFFFF_FFFF_FFFF_FFFF'],
            ]],
            ['1_000+1', [
                [\T_LNUMBER, '1_000'],
                [ord('+'), '+'],
                [\T_LNUMBER, '1'],
            ]],
            ['1_0abc', [
                [\T_LNUMBER, '1_0'],
                [\T_STRING, 'abc'],
            ]],
            ['?->', [
                [\T_NULLSAFE_OBJECT_OPERATOR, '?->'],
            ]],
            ['#[Attr]', [
                [\T_ATTRIBUTE, '#['],
                [\T_STRING, 'Attr'],
                [ord(']'), ']'],
            ]],
            ["#[\nAttr\n]", [
                [\T_ATTRIBUTE, '#['],
                [\T_STRING, 'Attr'],
                [ord(']'), ']'],
            ]],
            // Test interaction of two patch-based emulators
            ["<<<LABEL\n    LABEL, #[Attr]", [
                [\T_START_HEREDOC, "<<<LABEL\n"],
                [\T_END_HEREDOC, "    LABEL"],
                [ord(','), ','],
                [\T_ATTRIBUTE, '#['],
                [\T_STRING, 'Attr'],
                [ord(']'), ']'],
            ]],
            ["#[Attr] <<<LABEL\n    LABEL,", [
                [\T_ATTRIBUTE, '#['],
                [\T_STRING, 'Attr'],
                [ord(']'), ']'],
                [\T_START_HEREDOC, "<<<LABEL\n"],
                [\T_END_HEREDOC, "    LABEL"],
                [ord(','), ','],
            ]],
            // Enums use a contextual keyword
            ['enum Foo {}', [
                [\T_ENUM, 'enum'],
                [\T_STRING, 'Foo'],
                [ord('{'), '{'],
                [ord('}'), '}'],
            ]],
            ['class Enum {}', [
                [\T_CLASS, 'class'],
                [\T_STRING, 'Enum'],
                [ord('{'), '{'],
                [ord('}'), '}'],
            ]],
            ['class Enum extends X {}', [
                [\T_CLASS, 'class'],
                [\T_STRING, 'Enum'],
                [\T_EXTENDS, 'extends'],
                [\T_STRING, 'X'],
                [ord('{'), '{'],
                [ord('}'), '}'],
            ]],
            ['class Enum implements X {}', [
                [\T_CLASS, 'class'],
                [\T_STRING, 'Enum'],
                [\T_IMPLEMENTS, 'implements'],
                [\T_STRING, 'X'],
                [ord('{'), '{'],
                [ord('}'), '}'],
            ]],
            ['0o123', [
                [\T_LNUMBER, '0o123'],
            ]],
            ['0O123', [
                [\T_LNUMBER, '0O123'],
            ]],
            ['0o1_2_3', [
                [\T_LNUMBER, '0o1_2_3'],
            ]],
            ['0o1000000000000000000000', [
                [\T_DNUMBER, '0o1000000000000000000000'],
            ]],
            ['readonly class', [
                [\T_READONLY, 'readonly'],
                [\T_CLASS, 'class'],
            ]],
            ['function readonly(', [
                [\T_FUNCTION, 'function'],
                [\T_READONLY, 'readonly'],
                [ord('('), '('],
            ]],
            ['function readonly (', [
                [\T_FUNCTION, 'function'],
                [\T_READONLY, 'readonly'],
                [ord('('), '('],
            ]],

// PHP 8.4: Asymmetric visibility modifiers
            ['private(set)', [
                [\T_PRIVATE_SET, 'private(set)']
            ]],
            ['PROTECTED(SET)', [
                [\T_PROTECTED_SET, 'PROTECTED(SET)']
            ]],
            ['Public(Set)', [
                [\T_PUBLIC_SET, 'Public(Set)']
            ]],
            ['public (set)', [
                [\T_PUBLIC, 'public'],
                [\ord('('), '('],
                [\T_STRING, 'set'],
                [\ord(')'), ')'],
            ]],
            ['->public(set)', [
                [\T_OBJECT_OPERATOR, '->'],
                [\T_STRING, 'public'],
                [\ord('('), '('],
                [\T_STRING, 'set'],
                [\ord(')'), ')'],
            ]],
            ['?-> public(set)', [
                [\T_NULLSAFE_OBJECT_OPERATOR, '?->'],
                [\T_STRING, 'public'],
                [\ord('('), '('],
                [\T_STRING, 'set'],
                [\ord(')'), ')'],
            ]],

// PHP 8.5: Pipe operator
            ['|>', [
                [\T_PIPE, '|>']
            ]],

// PHP 8.5: Void cast
            ['(void)', [
                [\T_VOID_CAST, '(void)'],
            ]],
            ["( \tvoid \t)", [
                [\T_VOID_CAST, "( \tvoid \t)"],
            ]],
            ['( vOiD)', [
                [\T_VOID_CAST, '( vOiD)'],
            ]],
            ["(void\n)", [
                [\ord('('), '('],
                [\T_STRING, 'void'],
                [\ord(')'), ')'],
            ]],
        ];
    }

/**
     * @dataProvider provideTestTargetVersion
     */
    public function testTargetVersion(string $phpVersion, string $code, array $expectedTokens): void {
        $lexer = new Emulative(PhpVersion::fromString($phpVersion));
        $this->assertSameTokens($expectedTokens, $lexer->tokenize('<?php ' . $code));
    }

public static function provideTestTargetVersion() {
        return [
            ['8.0', 'match', [[\T_MATCH, 'match']]],
            ['7.4', 'match', [[\T_STRING, 'match']]],
            // Keywords are not case-sensitive.
            ['8.0', 'MATCH', [[\T_MATCH, 'MATCH']]],
            ['7.4', 'MATCH', [[\T_STRING, 'MATCH']]],
            // Tested here to skip testLeaveStuffAloneInStrings.
            ['8.0', '"$foo?->bar"', [
                [ord('"'), '"'],
                [\T_VARIABLE, '$foo'],
                [\T_NULLSAFE_OBJECT_OPERATOR, '?->'],
                [\T_STRING, 'bar'],
                [ord('"'), '"'],
            ]],
            ['8.0', '"$foo?->bar baz"', [
                [ord('"'), '"'],
                [\T_VARIABLE, '$foo'],
                [\T_NULLSAFE_OBJECT_OPERATOR, '?->'],
                [\T_STRING, 'bar'],
                [\T_ENCAPSED_AND_WHITESPACE, ' baz'],
                [ord('"'), '"'],
            ]],
            ['8.4', '__PROPERTY__', [[\T_PROPERTY_C, '__PROPERTY__']]],
            ['8.3', '__PROPERTY__', [[\T_STRING, '__PROPERTY__']]],
            ['8.4', '__property__', [[\T_PROPERTY_C, '__property__']]],
            ['8.3', '__property__', [[\T_STRING, '__property__']]],
            ['8.4', 'public(set)', [
                [\T_PUBLIC_SET, 'public(set)'],
            ]],
            ['8.3', 'public(set)', [
                [\T_PUBLIC, 'public'],
                [\ord('('), '('],
                [\T_STRING, 'set'],
                [\ord(')'), ')']
            ]],
            ['8.5', '|>', [
                [\T_PIPE, '|>']
            ]],
            ['8.4', '|>', [
                [\ord('|'), '|'],
                [\ord('>'), '>'],
            ]],
            ['8.5', '(void)', [
                [\T_VOID_CAST, '(void)'],
            ]],
            ['8.5', "( \tvoid \t)", [
                [\T_VOID_CAST, "( \tvoid \t)"],
            ]],
            ['8.4', '(void)', [
                [\ord('('), '('],
                [\T_STRING, 'void'],
                [\ord(')'), ')'],
            ]],
            ['8.4', "( \tVOID \t)", [
                [\ord('('), '('],
                [\T_STRING, 'VOID'],
                [\ord(')'), ')'],
            ]],
        ];
    }
}

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