<?php

/*
 * This file is part of the Alice package.
 *
 * (c) Nelmio <hello@nelm.io>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

declare(strict_types=1);

namespace Nelmio\Alice\FixtureBuilder\ExpressionLanguage\Parser;

use Nelmio\Alice\Definition\MethodCall\IdentityFactory;
use Nelmio\Alice\Definition\Value\ArrayValue;
use Nelmio\Alice\Definition\Value\DynamicArrayValue;
use Nelmio\Alice\Definition\Value\FixtureMatchReferenceValue;
use Nelmio\Alice\Definition\Value\FixtureMethodCallValue;
use Nelmio\Alice\Definition\Value\FixturePropertyValue;
use Nelmio\Alice\Definition\Value\FixtureReferenceValue;
use Nelmio\Alice\Definition\Value\FunctionCallValue;
use Nelmio\Alice\Definition\Value\ListValue;
use Nelmio\Alice\Definition\Value\OptionalValue;
use Nelmio\Alice\Definition\Value\ParameterValue;
use Nelmio\Alice\Definition\Value\ValueForCurrentValue;
use Nelmio\Alice\Definition\Value\VariableValue;
use Nelmio\Alice\FixtureBuilder\ExpressionLanguage\ParserInterface;
use Nelmio\Alice\Loader\NativeLoader;
use Nelmio\Alice\Throwable\ExpressionLanguageParseThrowable;
use PHPUnit\Framework\TestCase;

/**
 * @group integration
 * @coversNothing
 */
class ParserIntegrationTest extends TestCase
{
    /** @var ParserInterface */
    protected $parser;

    /**
     * @inheritdoc
     */
    public function setUp()
    {
        $this->parser = (new NativeLoader())->getExpressionLanguageParser();
    }

    /**
     * @dataProvider provideValues
     */
    public function testParseValues(string $value, $expected)
    {
        try {
            $actual = $this->parser->parse($value);
            if (null === $expected) {
                $this->fail(
                    sprintf(
                        'Expected exception to be thrown for "%s", got "%s" instead.',
                        $value,
                        var_export($actual, true)
                    )
                );
            }
        } catch (\InvalidArgumentException $exception) {
            if (null === $expected) {
                return;
            }

            throw $exception;
        } catch (ExpressionLanguageParseThrowable $exception) {
            if (null === $expected) {
                return;
            }

            throw $exception;
        }

        $this->assertEquals($expected, $actual, var_export($actual, true));
    }

    public function provideValues()
    {
        // Simple values
        yield 'empty string' => [
            '',
            '',
        ];

        yield 'regular string value' => [
            'dummy',
            'dummy',
        ];

        yield 'string value with quotes' => [
            '\'dummy\'',
            '\'dummy\'',
        ];

        yield 'string value with double quotes' => [
            '"dummy"',
            '"dummy"',
        ];

        // Escaped character
        yield '[Escape character] nominal (1)' => [
            '\\',
            null,
        ];
        yield '[Escape character] nominal (2)' => [
            '\\\\',
            '\\',
        ];
        yield '[Escape character] with empty reference' => [
            '\\@',
            '@',
        ];
        yield '[Escape character] with reference' => [
            '\\@user0',
            '@user0',
        ];
        yield '[Escape character] with function reference' => [
            '\\@<foo()>',
            new ListValue([
                '@',
                new FunctionCallValue('foo'),
            ])
        ];
        yield '[Escape character] double escape with reference' => [
            '\\\\@',
            null,
        ];
        yield '[Escape character] with empty reference' => [
            '\\\\\\@',
            '\\@',
        ];

        // Escaped arrow
        yield '[Escaped arrow] nominal (1)' => [
            '\<',
            '<',
        ];
        yield '[Escaped arrow] nominal (2)' => [
            '\>',
            '>',
        ];
        yield '[Escaped arrow] parameter' => [
            '\<{param}>',
            '<{param}>',
        ];
        yield '[Escaped arrow] function' => [
            '\<f()>',
            '<f()>',
        ];
        yield '[Escaped arrow] surrounded' => [
            'foo \< bar \> baz',
            'foo < bar > baz',
        ];

        // Escaped percent sign
        yield '[Escaped percent sign]' => [
            '\%',
            '%',
        ];
        yield '[Escaped percent sign]' => [
            'a\%b',
            'a%b',
        ];
        yield '[Escaped percent sign]' => [
            '100\%',
            '100%',
        ];

        // Parameters
        yield '[Parameter] nominal' => [
            '<{dummy_param}>',
            new ParameterValue('dummy_param'),
        ];
        yield '[Parameter] unbalanced (1)' => [
            '<{dummy_param>',
            null,
        ];
        yield '[Parameter] escaped unbalanced (1)' => [
            '\<{dummy_param>',
            null,
        ];
        yield '[Parameter] unbalanced (2)' => [
            '<{dummy_param',
            null,
        ];
        yield '[Parameter] escaped unbalanced (2)' => [
            '\<{dummy_param',
            '<{dummy_param',
        ];
        yield '[Parameter] unbalanced (3)' => [
            '<dummy_param}>',
            null,
        ];
        yield '[Parameter] escaped unbalanced (3)' => [
            '\<dummy_param}\>',
            '<dummy_param}>',
        ];
        yield '[Parameter] unbalanced (4)' => [
            'dummy_param}>',
            null,
        ];
        yield '[Parameter] escaped unbalanced (4)' => [
            'dummy_param}\>',
            'dummy_param}>',
        ];
        yield '[Parameter] successive' => [
            '<{param1}><{param2}>',
            new ListValue([
                new ParameterValue('param1'),
                new ParameterValue('param2'),
            ]),
        ];
        yield '[Parameter] nested' => [
            '<{value_<{nested_param}>}>',
            null,
        ];
        yield '[Parameter] nested escape' => [
            '<{value_\<{nested_param}>}>',
            null,
        ];
        yield '[Parameter] surrounded - nested' => [
            'foo <{value_<{nested_param}>}> bar',
            null,
        ];

        // Functions
        yield '[Function] nominal' => [
            '<function()>',
            new FunctionCallValue('function'),
        ];
        yield '[Function] localized nominal' => [
            '<fr_FR:function()>',
            new FunctionCallValue('fr_FR:function'),
        ];
        yield '[Function] unbalanced (1)' => [
            '<function()',
            null,
        ];
        yield '[Function] escaped unbalanced (1)' => [
            '\<function()',
            null,
        ];
        yield '[Function] unbalanced (2)' => [
            'function()>',
            null,
        ];
        yield '[Function] escaped unbalanced (2)' => [
            'function()\>',
            'function()>',
        ];
        yield '[Function] unbalanced (3)' => [
            '<function(>',
            null,
        ];
        yield '[Function] escaped unbalanced (3)' => [
            '\<function(\>',
            null,
        ];
        yield '[Function] unbalanced (4)' => [
            '<function)>',
            null,
        ];
        yield '[Function] escaped unbalanced (4)' => [
            '\<function)\>',
            '<function)>',
        ];
        yield '[Function] with numeric characters' => [
            '<ipv6()>',
            new FunctionCallValue('ipv6'),
        ];
        yield '[Function] successive functions' => [
            '<f()><g()>',
            new ListValue([
                new FunctionCallValue('f'),
                new FunctionCallValue('g'),
            ]),
        ];
        yield '[Function] correct successive functions' => [
            '<f()> <g()>',
            new ListValue([
                new FunctionCallValue('f'),
                ' ',
                new FunctionCallValue('g'),
            ]),
        ];
        yield '[Function] nested functions' => [
            '<f(<g()>)>',
            new FunctionCallValue(
                'f',
                [
                    new FunctionCallValue('g'),
                ]
            ),
        ];
        yield '[Function] nominal surrounded' => [
            'foo <function()> bar',
            new ListValue([
                'foo ',
                new FunctionCallValue('function'),
                ' bar',
            ]),
        ];

        yield '[Function] nominal identity' => [
            '<(function())>',
            IdentityFactory::create('function()'),
        ];
        yield '[Function] identity with args' => [
            '<(function(echo("hello")))>',
            IdentityFactory::create('function(echo("hello"))'),
        ];
        yield '[Function] identity with params' => [
            '<(function(echo(<{param}>))>',
            IdentityFactory::create('function(echo(<{param}>)'),
        ];
        yield '[X] parameter, function, identity and escaped' => [
            '<{param}><function()><(echo("hello"))>\<escaped_value\>',
            new ListValue([
                new ParameterValue('param'),
                new FunctionCallValue('function'),
                IdentityFactory::create('echo("hello")'),
                '<escaped_value>',
            ]),
        ];
        yield '[Function] nominal with arguments' => [
            '<function($foo, $arg)>',
            new FunctionCallValue(
                'function',
                [
                    new VariableValue('foo'),
                    new VariableValue('arg'),
                ]
            ),
        ];
        yield '[Function] nominal with string arguments which contains quotes' => [
            '<function(\'foo\', "bar")>',
            new FunctionCallValue(
                'function',
                [
                    'foo',
                    'bar',
                ]
            ),
        ];
        yield '[Function] nominal with array argument which contains string elements in quotes' => [
            '<function([\'foo\', "bar"])>',
            new FunctionCallValue(
                'function',
                [
                    ['foo', 'bar'],
                ]
            ),
        ];
        yield '[Function] unbalanced with arguments (1)' => [
            '<function($foo, $arg)',
            null,
        ];
        yield '[Function] escaped unbalanced with arguments (1)' => [
            '\<function($foo, $arg)',
            null,
        ];
        yield '[Function] unbalanced with arguments (2)' => [
            'function($foo, $arg)>',
            null,
        ];
        yield '[Function] escaped unbalanced with arguments (2)' => [
            'function($foo, $arg)\>',
            new ListValue([
                'function(',
                new VariableValue('foo'),
                ', ',
                new VariableValue('arg'),
                ')>',
            ]),
        ];
        yield '[Function] escaped unbalanced with arguments (4)' => [
            '\<function$foo, $arg)>',
            null,
        ];
        yield '[Function] successive functions with arguments' => [
            '<f($foo, $arg)><g($baz, $faz)>',
            new ListValue([
                new FunctionCallValue(
                    'f',
                    [
                        new VariableValue('foo'),
                        new VariableValue('arg'),
                    ]
                ),
                new FunctionCallValue(
                    'g',
                    [
                        new VariableValue('baz'),
                        new VariableValue('faz'),
                    ]
                ),
            ]),
        ];
        yield '[Function] correct successive functions with arguments' => [
            '<f($foo, $arg)> <g($baz, $faz)>',
            new ListValue([
                new FunctionCallValue(
                    'f',
                    [
                        new VariableValue('foo'),
                        new VariableValue('arg'),
                    ]
                ),
                ' ',
                new FunctionCallValue(
                    'g',
                    [
                        new VariableValue('baz'),
                        new VariableValue('faz'),
                    ]
                ),
            ]),
        ];
        yield '[Function] nested functions with arguments' => [
            '<f(<g($baz)>, $arg)>',
            new FunctionCallValue(
                'f',
                [
                    new FunctionCallValue(
                        'g',
                        [
                            new VariableValue('baz'),
                        ]
                    ),
                    new VariableValue('arg'),
                ]
            ),
        ];
        yield '[Function] nested functions with multiple arguments' => [
            '<f(<g($baz, $faz)>, $arg)>',
            null, // Will fail because cannot guess that the first comma is for the nested function and not for the
                  // parent function.
        ];
        yield '[Function] nominal surrounded with arguments' => [
            'foo <function($foo, $arg)> bar',
            new ListValue([
                'foo ',
                new FunctionCallValue(
                    'function',
                    [
                        new VariableValue('foo'),
                        new VariableValue('arg'),
                    ]
                ),
                ' bar',
            ]),
        ];

        yield '[Function] nominal identity with arguments' => [
            '<(function($foo, $arg))>',
            IdentityFactory::create('function($foo, $arg)'),
        ];
        // https://github.com/nelmio/alice/issues/773
        yield '[Function] with tricky string arguments' => [
            '<dateTimeBetween(\'something,\', \'-12 months\', \'\', \',\', $now, "something,", "-12 months", "", ",")>',
            new FunctionCallValue(
                'dateTimeBetween',
                [
                    'something,',
                    '-12 months',
                    '',
                    ',',
                    new VariableValue('now'),
                    'something,',
                    '-12 months',
                    '',
                    ',',
                ]
            ),
        ];

        // Arrays
        yield '[Array] nominal string array' => [
            '10x @user',
            new DynamicArrayValue(
                10,
                new FixtureReferenceValue('user')
            ),
        ];
        yield '[Array] string array with negative number' => [
            '-10x @user',
            null,
        ];
        yield '[Array] string array with left member' => [
            'foo 10x @user',
            null,
        ];
        yield '[Array] string array with right member' => [
            '10x @user bar',
            new DynamicArrayValue(
                10,
                new ListValue([
                    new FixtureReferenceValue('user'),
                    ' bar',
                ])
            ),
        ];
        yield '[Array] string array with P1' => [
            '<dummy>x 50x <hello>',
            null,
        ];
        yield '[Array] string array with string array' => [
            '10x [@user->name, @group->getName()]',
            new DynamicArrayValue(
                10,
                [
                    new FixturePropertyValue(
                        new FixtureReferenceValue('user'),
                        'name'
                    ),
                    new FixtureMethodCallValue(
                        new FixtureReferenceValue('group'),
                        new FunctionCallValue('getName')
                    ),
                ]
            ),
        ];
        yield '[Array] escaped array' => [
            '\[X]',
            '[X]',
        ];
        yield '[Array] malformed escaped array 1' => [
            '\[X]',
            '[X]',
        ];
        yield '[Array] malformed escaped array 2' => [
            '[X\]',
            null,
        ];
        yield '[Array] surrounded escaped array' => [
            'foo \[X] bar',
            'foo [X] bar',
        ];
        yield '[Array] surrounded escaped array with param' => [
            'foo \[X] yo <{param}> bar',
            new ListValue([
                'foo [X] yo ',
                new ParameterValue('param'),
                ' bar',
            ]),
        ];
        yield '[Array] simple string array' => [
            '[@user->name, @group->getName()]',
            [
                new FixturePropertyValue(
                    new FixtureReferenceValue('user'),
                    'name'
                ),
                new FixtureMethodCallValue(
                    new FixtureReferenceValue('group'),
                    new FunctionCallValue('getName')
                ),
            ],
        ];

        // Optional
        yield '[Optional] nominal' => [
            '80%? Y',
            new OptionalValue(
                '80',
                'Y'
            ),
        ];
        yield '[Optional] with negative number' => [
            '-50%? Y',
            new ListValue([
                '-',
                new OptionalValue(
                    '50',
                    'Y'
                )
            ]),
        ];
        yield '[Optional] with float' => [
            '0.5%? Y',
            new OptionalValue(
                '0.5',
                'Y'
            ),
        ];
        yield '[Optional] with <X>' => [
            '<{dummy}>%? Y',
            new OptionalValue(
                new ParameterValue('dummy'),
                'Y'
            ),
        ];
        yield '[Optional] complete' => [
            '80%? Y: Z',
            new OptionalValue(
                '80',
                'Y',
                'Z'
            ),
        ];
        yield '[Optional] complete with superfluous space' => [
            '80%?  Y :  Z  ',
            new ListValue([
                new OptionalValue(
                    '80',
                    'Y',
                    'Z'
                ),
                '  ',
            ]),
        ];
        yield '[Optional] complete with negative number' => [
            '-50%? Y: Z',
            new ListValue([
                '-',
                new OptionalValue(
                    '50',
                    'Y',
                    'Z'
                ),
            ]),
        ];
        yield '[Optional] complete with float' => [
            '0.5%? Y: Z',
            new OptionalValue(
                '0.5',
                'Y',
                'Z'
            )
        ];
        yield '[Optional] complete with <X>' => [
            '<{dummy}>%? Y: Z',
            new OptionalValue(
                new ParameterValue('dummy'),
                'Y',
                'Z'
            ),
        ];
        yield '[Optional] nominal with left member' => [
            'foo 80%? Y',
            new ListValue([
                'foo ',
                new OptionalValue(
                    '80',
                    'Y'
                )
            ]),
        ];
        yield '[Optional] with negative number and left member' => [
            'foo -50%? Y',
            new ListValue([
                'foo -',
                new OptionalValue(
                    '50',
                    'Y'
                )
            ]),
        ];
        yield '[Optional] with float and left member' => [
            'foo 0.5%? Y',
            new ListValue([
                'foo ',
                new OptionalValue(
                    '0.5',
                    'Y'
                )
            ]),
        ];
        yield '[Optional] with <X> and left member' => [
            'foo <{dummy}>%? Y',
            new ListValue([
                'foo ',
                new OptionalValue(
                    new ParameterValue('dummy'),
                    'Y'
                )
            ]),
        ];
        yield '[Optional] complete with left member' => [
            'foo 80%? Y: Z',
            new ListValue([
                'foo ',
                new OptionalValue(
                    '80',
                    'Y',
                    'Z'
                )
            ]),
        ];
        yield '[Optional] complete with negative number and left member' => [
            'foo -50%? Y: Z',
            new ListValue([
                'foo -',
                new OptionalValue(
                    '50',
                    'Y',
                    'Z'
                )
            ]),
        ];
        yield '[Optional] complete with float and left member' => [
            'foo 0.5%? Y: Z',
            new ListValue([
                'foo ',
                new OptionalValue(
                    '0.5',
                    'Y',
                    'Z'
                )
            ]),
        ];
        yield '[Optional] complete with <X> and left member' => [
            'foo <{dummy}>%? Y: Z',
            new ListValue([
                'foo ',
                new OptionalValue(
                    new ParameterValue('dummy'),
                    'Y',
                    'Z'
                )
            ]),
        ];
        yield '[Optional] without members' => [
            '80%? ',
            null,
        ];
        yield '[Optional] without members 2' => [
            '80%?',
            null,
        ];
        yield '[Optional] without first member but with second' => [
            '80%? :Z',
            null,
        ];
        yield '[Optional] with first member containing a string' => [
            '80%? foo bar',
            new OptionalValue(
                '80',
                'foo bar'
            ),
        ];
        yield '[Optional] with first member containing a space and second member' => [
            '80%? foo bar: baz',
            new OptionalValue(
                '80',
                'foo bar',
                'baz'
            ),
        ];
        yield '[Optional] with first member containing a space and second member too' => [
            '80%? foo bar: baz faz',
            new ListValue([
                new OptionalValue(
                    '80',
                    'foo bar',
                    'baz'
                ),
                ' faz',
            ]),
        ];
        yield '[Optional] with second member containing a space' => [
            '80%? foo: bar baz',
            new ListValue([
                new OptionalValue(
                    '80',
                    'foo',
                    'bar'
                ),
                ' baz',
            ]),
        ];
        yield '[Optional] with second member without the space after semicolon' => [
            '80%? foo:bar baz',
            null,
        ];
        yield '[Optional] without space after quantifier' => [
            '80%?foo bar',
            null,
        ];
        yield '[Optional] without space after quantifier with second member' => [
            '80%?foo: bar baz',
            null,
        ];
        yield '[Optional] surrounded with params' => [
            'foo 80%? <{dummy}>: <another()> baz',
            new ListValue([
                'foo ',
                new OptionalValue(
                    '80',
                    new ParameterValue('dummy'),
                    new FunctionCallValue('another')
                ),
                ' baz',
            ]),
        ];
        yield '[Optional] surrounded with params and nested' => [
            '<foo()> -80%? <{dum10}>%? y: z my>: \<another\> <baz()>',
            null,
        ];

        // References
        yield '[Reference] empty reference' => [
            '@',
            null,
        ];
        yield '[Reference] empty escaped reference' => [
            '\@',
            '@',
        ];
        yield '[Reference] empty reference with second member' => [
            '@ foo',
            null,
        ];
        yield '[Reference] escaped empty reference with second member' => [
            '\@ foo',
            '@ foo',
        ];
        yield '[Reference] alone with strings' => [
            '@user0',
            new FixtureReferenceValue('user0'),
        ];
        yield '[Reference] escaped alone with strings' => [
            '\@user0',
            '@user0',
        ];
        yield '[Reference] left with strings' => [
            'foo @user0',
            new ListValue([
                'foo ',
                new FixtureReferenceValue('user0'),
            ]),
        ];
        yield '[Reference] right with strings' => [
            '@user0 bar',
            new ListValue([
                new FixtureReferenceValue('user0'),
                ' bar',
            ]),
        ];
        yield '[Reference] alone with prop' => [
            '@user0->username',
            new FixturePropertyValue(
                new FixtureReferenceValue('user0'),
                'username'
            ),
        ];
        yield '[Reference] wildcard with prop' => [
            '@user*->username',
            new FixturePropertyValue(
                FixtureMatchReferenceValue::createWildcardReference('user'),
                'username'
            ),
        ];
        yield '[Reference] list with prop' => [
            '@user{alice, bob}->username',
            new FixturePropertyValue(
                new ArrayValue([
                    new FixtureReferenceValue('useralice'),
                    new FixtureReferenceValue('userbob'),
                ]),
                'username'
            ),
        ];
        yield '[Reference] range with prop' => [
            '@user{1..2}->username',
            new FixturePropertyValue(
                new ArrayValue([
                    new FixtureReferenceValue('user1'),
                    new FixtureReferenceValue('user2'),
                ]),
                'username'
            ),
        ];
        yield '[Reference] left with prop' => [
            'foo @user0->username',
            new ListValue([
                'foo ',
                new FixturePropertyValue(
                    new FixtureReferenceValue('user0'),
                    'username'
                ),
            ])
        ];
        yield '[Reference] right with prop' => [
            '@user0->username bar',
            new ListValue([
                new FixturePropertyValue(
                    new FixtureReferenceValue('user0'),
                    'username'
                ),
                ' bar',
            ]),
        ];
        yield '[Reference] successive prop' => [
            '@user0->username->value',
            null,
        ];
        yield '[Reference] surrounded successive prop' => [
            'foo @user0->username->value bar',
            null,
        ];
        yield '[Reference] with nested' => [
            '@user0@user1',
            new ListValue([
                new FixtureReferenceValue('user0'),
                new FixtureReferenceValue('user1'),
            ]),
        ];
        yield '[Reference] with nested surrounded' => [
            'foo @user0@user1 bar',
            new ListValue([
                'foo ',
                new FixtureReferenceValue('user0'),
                new FixtureReferenceValue('user1'),
                ' bar',

            ]),
        ];
        yield '[Reference] nominal range' => [
            '@user{1..2}',
            new ArrayValue([
                new FixtureReferenceValue('user1'),
                new FixtureReferenceValue('user2'),
            ]),
        ];
        yield '[Reference] surrounded range' => [
            'foo @user{1..2} bar',
            new ListValue([
                'foo ',
                new ArrayValue([
                    new FixtureReferenceValue('user1'),
                    new FixtureReferenceValue('user2'),
                ]),
                ' bar',
            ]),
        ];
        yield '[Reference] successive' => [
            '@user{1..2}@group{3..4}',
            new ListValue([
                new ArrayValue([
                    new FixtureReferenceValue('user1'),
                    new FixtureReferenceValue('user2'),
                ]),
                new ArrayValue([
                    new FixtureReferenceValue('group3'),
                    new FixtureReferenceValue('group4'),
                ]),
            ]),
        ];
        yield '[Reference] range-prop' => [
            '@user->username{1..2}',
            new ListValue([
                new FixturePropertyValue(
                    new FixtureReferenceValue('user'),
                    'username'
                ),
                '{1..2}'
            ]),
        ];
        yield '[Reference] range-method' => [
            '@user->getUserName(){1..2}',
            new ListValue([
                new FixtureMethodCallValue(
                    new FixtureReferenceValue('user'),
                    new FunctionCallValue('getUserName')
                ),
                '{1..2}'
            ]),
        ];
        yield '[Reference] with nested with prop' => [
            '@user0->@user1',
            null,
        ];
        yield '[Reference] with nested with prop surrounded' => [
            'foo @user0->@user1 bar',
            null,
        ];
        yield '[Reference] with successive with prop surrounded' => [
            'foo @user0->username @user1->name bar',
            new ListValue([
                'foo ',
                new FixturePropertyValue(
                    new FixtureReferenceValue('user0'),
                    'username'
                ),
                ' ',
                new FixturePropertyValue(
                    new FixtureReferenceValue('user1'),
                    'name'
                ),
                ' bar',
            ]),
        ];
        yield '[Reference] alone with function' => [
            '@user0->getUserName()',
            new FixtureMethodCallValue(
                new FixtureReferenceValue('user0'),
                new FunctionCallValue('getUserName')
            ),
        ];
        yield '[Reference] wildcard alone with function' => [
            '@user*->getUserName()',
            new FixtureMethodCallValue(
                FixtureMatchReferenceValue::createWildcardReference('user'),
                new FunctionCallValue('getUserName')
            ),
        ];
        yield '[Reference] function surrounded' => [
            'foo @user0->getUserName() bar',
            new ListValue([
                'foo ',
                new FixtureMethodCallValue(
                    new FixtureReferenceValue('user0'),
                    new FunctionCallValue('getUserName')
                ),
                ' bar',
            ]),
        ];
        yield '[Reference] alone with function with arguments' => [
            '@user0->getUserName($username)',
            new FixtureMethodCallValue(
                new FixtureReferenceValue('user0'),
                new FunctionCallValue(
                    'getUserName',
                    [
                        new VariableValue('username'),
                    ]
                )
            ),
        ];
        yield '[Reference] alone with function with arguments containing nested reference' => [
            '@user0->getUserName($username, @group->getName($foo))',
            null,
        ];
        yield '[Reference] alone with fluent function' => [
            '@user0->getUserName()->getName()',
            null,
        ];
        yield '[Reference] surrounded with fluent function' => [
            'foo @user0->getUserName()->getName() bar',
            null,
        ];
        yield '[Reference] nominal wildcard' => [
            '@user*',
            FixtureMatchReferenceValue::createWildcardReference('user'),
        ];
        yield '[Reference] surrounded wildcard' => [
            'foo @user* bar',
            new ListValue([
                'foo ',
                FixtureMatchReferenceValue::createWildcardReference('user'),
                ' bar',
            ]),
        ];
        yield '[Reference] nominal list' => [
            '@user0{alice, bob}',
            new ArrayValue([
                new FixtureReferenceValue('user0alice'),
                new FixtureReferenceValue('user0bob'),
            ]),
        ];
        yield '[Reference] list with function' => [
            '@user{alice, bob}->getUserName()',
            new FixtureMethodCallValue(
                new ArrayValue([
                    new FixtureReferenceValue('useralice'),
                    new FixtureReferenceValue('userbob'),
                ]),
                new FunctionCallValue('getUserName', [])
            ),
        ];
        yield '[Reference] surrounded list' => [
            'foo @user0{alice, bob} bar',
            new ListValue([
                'foo ',
                new ArrayValue([
                    new FixtureReferenceValue('user0alice'),
                    new FixtureReferenceValue('user0bob'),
                ]),
                ' bar',
            ]),
        ];
        yield '[Reference] reference function' => [
            '@user0<foo()>',
            new FixtureReferenceValue(
                new ListValue([
                    'user0',
                    new FunctionCallValue('foo')
                ])
            ),
        ];
        yield '[Reference] reference which is entirely a function' => [
            '@<foo()>',
            new FixtureReferenceValue(
                new ListValue([
                    '',
                    new FunctionCallValue('foo'),
                ])
            ),
        ];
        yield '[Reference] surrounded reference function' => [
            'foo @user0<foo()> bar',
            new ListValue([
                'foo ',
                new FixtureReferenceValue(
                    new ListValue([
                        'user0',
                        new FunctionCallValue('foo')
                    ])
                ),
                ' bar',
            ]),
        ];
        yield '[Reference] reference function with args' => [
            '@user0<f($foo, $bar)>',
            new FixtureReferenceValue(
                new ListValue([
                    'user0',
                    new FunctionCallValue(
                        'f',
                        [
                            new VariableValue('foo'),
                            new VariableValue('bar'),
                        ]
                    )
                ])
            ),
        ];
        yield '[Reference] surrounded reference function with args' => [
            'foo @user0<f($foo, $bar)> bar',
            new ListValue([
                'foo ',
                new FixtureReferenceValue(
                    new ListValue([
                        'user0',
                        new FunctionCallValue(
                            'f',
                            [
                                new VariableValue('foo'),
                                new VariableValue('bar'),
                            ]
                        )
                    ])
                ),
                ' bar',
            ]),
        ];
        yield '[Reference] function successive' => [
            '@user0->getUserName()@user1->getName()',
            null,
        ];
        yield '[Reference] function successive surrounded' => [
            'foo @user0->getUserName()@user1->getName() bar',
            null,
        ];
        yield '[Reference] function nested with function' => [
            '@user0->@user1->getUsername()',
            null,
        ];
        yield '[Reference] function nested with function surrounded' => [
            'foo @user0->@user1->getUsername() bar',
            null,
        ];
        yield '[Reference] current' => [
            'foo @user0<current()> bar',
            new ListValue([
                'foo ',
                new FixtureReferenceValue(
                    new ListValue([
                        'user0',
                        new FunctionCallValue('current', [new ValueForCurrentValue()])
                    ])
                ),
                ' bar',
            ]),
        ];

        // Variables
        yield '[Variable] empty variable' => [
            '$',
            null,
        ];
        yield '[Variable] empty variable with second member' => [
            '$ foo',
            null,
        ];
        yield '[Variable] alone' => [
            '$username',
            new VariableValue('username'),
        ];
        yield '[Variable] numerical' => [
            '$0',
            new VariableValue('0'),
        ];
        yield '[Variable] left' => [
            'foo $username',
            new ListValue([
                'foo ',
                new VariableValue('username'),
            ]),
        ];
        yield '[Variable] right' => [
            '$username bar',
            new ListValue([
                new VariableValue('username'),
                ' bar',
            ]),
        ];
        yield '[Variable] successive' => [
            '$foo$bar',
            new ListValue([
                new VariableValue('foo'),
                new VariableValue('bar'),
            ]),
        ];
        yield '[Variable] successive surrounded' => [
            'faz $foo$bar baz',
            new ListValue([
                'faz ',
                new VariableValue('foo'),
                new VariableValue('bar'),
                ' baz',
            ]),
        ];
        yield '[Variable] empty escaped variable' => [
            '\$',
            '$',
        ];
        yield '[Variable] escaped empty variable with second member' => [
            '\$ foo',
            '$ foo',
        ];
        yield '[Variable] alone with strings' => [
            '\$username',
            '$username',
        ];
    }
}
