psalm/tests/TypeCombinationTest.php

<?php
namespace Psalm\Tests;

use function array_values;
use Psalm\Internal\Type\TypeCombination;
use Psalm\Type;

class TypeCombinationTest extends TestCase
{
    use Traits\ValidCodeAnalysisTestTrait;

    /**
     * @dataProvider providerTestValidTypeCombination
     *
     * @param string $expected
     * @param array<int, string> $types
     *
     * @return void
     */
    public function testValidTypeCombination($expected, $types)
    {
        foreach ($types as $k => $type) {
            $types[$k] = self::getAtomic($type);
            $types[$k]->setFromDocblock();
        }

        /** @psalm-suppress InvalidArgument */
        $this->assertSame(
            $expected,
            (string) TypeCombination::combineTypes($types)
        );
    }

    /**
     * @return iterable<string,array{string,assertions?:array<string,string>,error_levels?:string[]}>
     */
    public function providerValidCodeParse()
    {
        return [
            'multipleValuedArray' => [
                '<?php
                    class A {}
                    class B {}
                    $var = [];
                    $var[] = new A();
                    $var[] = new B();',
            ],
            'preventLiteralAndClassString' => [
                '<?php
                    /**
                     * @param "array"|class-string $type_name
                     */
                    function foo(string $type_name) : bool {
                        return $type_name === "array";
                    }',
            ],
        ];
    }

    /**
     * @return array<string,array{string,array<int,string>}>
     */
    public function providerTestValidTypeCombination()
    {
        return [
            'intOrString' => [
                'int|string',
                [
                    'int',
                    'string',
                ],
            ],
            'mixedOrNull' => [
                'mixed|null',
                [
                    'mixed',
                    'null',
                ],
            ],
            'mixedOrEmpty' => [
                'mixed',
                [
                    'empty',
                    'mixed',
                ],
            ],
            'mixedOrObject' => [
                'mixed|object',
                [
                    'mixed',
                    'object',
                ],
            ],
            'mixedOrEmptyArray' => [
                'array<empty, empty>|mixed',
                [
                    'mixed',
                    'array<empty, empty>',
                ],
            ],
            'falseTrueToBool' => [
                'bool',
                [
                    'false',
                    'true',
                ],
            ],
            'trueFalseToBool' => [
                'bool',
                [
                    'true',
                    'false',
                ],
            ],
            'trueBoolToBool' => [
                'bool',
                [
                    'true',
                    'bool',
                ],
            ],
            'boolTrueToBool' => [
                'bool',
                [
                    'bool',
                    'true',
                ],
            ],
            'intOrTrueOrFalseToBool' => [
                'int|bool',
                [
                    'int',
                    'false',
                    'true',
                ],
            ],
            'intOrBoolOrTrueToBool' => [
                'int|bool',
                [
                    'int',
                    'bool',
                    'true',
                ],
            ],
            'intOrTrueOrBoolToBool' => [
                'int|bool',
                [
                    'int',
                    'true',
                    'bool',
                ],
            ],
            'arrayOfIntOrString' => [
                'array<array-key, int|string>',
                [
                    'array<int>',
                    'array<string>',
                ],
            ],
            'arrayOfIntOrAlsoString' => [
                'array<array-key, int>|string',
                [
                    'array<int>',
                    'string',
                ],
            ],
            'emptyArrays' => [
                'array<empty, empty>',
                [
                    'array<empty,empty>',
                    'array<empty,empty>',
                ],
            ],
            'arrayStringOrEmptyArray' => [
                'array<array-key, string>',
                [
                    'array<empty>',
                    'array<string>',
                ],
            ],
            'arrayMixedOrString' => [
                'array<array-key, mixed|string>',
                [
                    'array<mixed>',
                    'array<string>',
                ],
            ],
            'arrayMixedOrStringKeys' => [
                'array<int|string|mixed, string>',
                [
                    'array<int|string,string>',
                    'array<mixed,string>',
                ],
            ],
            'arrayMixedOrEmpty' => [
                'array<array-key, mixed>',
                [
                    'array<empty>',
                    'array<mixed>',
                ],
            ],
            'arrayBigCombination' => [
                'array<array-key, int|float|string>',
                [
                    'array<int|float>',
                    'array<string>',
                ],
            ],
            'arrayTraversableToIterable' => [
                'iterable<array-key|mixed, mixed>',
                [
                    'array',
                    'Traversable',
                ],
            ],
            'arrayIterableToIterable' => [
                'iterable<mixed, mixed>',
                [
                    'array',
                    'iterable',
                ],
            ],
            'iterableArrayToIterable' => [
                'iterable<mixed, mixed>',
                [
                    'iterable',
                    'array',
                ],
            ],
            'traversableIterableToIterable' => [
                'iterable<mixed, mixed>',
                [
                    'Traversable',
                    'iterable',
                ],
            ],
            'iterableTraversableToIterable' => [
                'iterable<mixed, mixed>',
                [
                    'iterable',
                    'Traversable',
                ],
            ],
            'arrayTraversableToIterableWithParams' => [
                'iterable<int, string|bool>',
                [
                    'array<int, string>',
                    'Traversable<int, bool>',
                ],
            ],
            'arrayIterableToIterableWithParams' => [
                'iterable<int, string|bool>',
                [
                    'array<int, string>',
                    'iterable<int, bool>',
                ],
            ],
            'iterableArrayToIterableWithParams' => [
                'iterable<int, string|bool>',
                [
                    'iterable<int, string>',
                    'array<int, bool>',
                ],
            ],
            'traversableIterableToIterableWithParams' => [
                'iterable<int, string|bool>',
                [
                    'Traversable<int, string>',
                    'iterable<int, bool>',
                ],
            ],
            'iterableTraversableToIterableWithParams' => [
                'iterable<int, string|bool>',
                [
                    'iterable<int, string>',
                    'Traversable<int, bool>',
                ],
            ],
            'arrayObjectAndParamsWithEmptyArray' => [
                'array<empty, empty>|ArrayObject<int, string>',
                [
                    'ArrayObject<int, string>',
                    'array<empty, empty>',
                ],
            ],
            'emptyArrayWithArrayObjectAndParams' => [
                'array<empty, empty>|ArrayObject<int, string>',
                [
                    'array<empty, empty>',
                    'ArrayObject<int, string>',
                ],
            ],
            'falseDestruction' => [
                'bool',
                [
                    'false',
                    'bool',
                ],
            ],
            'onlyFalse' => [
                'false',
                [
                    'false',
                ],
            ],
            'onlyTrue' => [
                'true',
                [
                    'true',
                ],
            ],
            'falseFalseDestruction' => [
                'false',
                [
                    'false',
                    'false',
                ],
            ],
            'aAndAOfB' => [
                'A<B>|A',
                [
                    'A',
                    'A<B>',
                ],
            ],
            'combineObjectType1' => [
                'array{a?: int, b?: string}',
                [
                    'array{a: int}',
                    'array{b: string}',
                ],
            ],
            'combineObjectType2' => [
                'array{a: int|string, b?: string}',
                [
                    'array{a: int}',
                    'array{a: string,b: string}',
                ],
            ],
            'combineObjectTypeWithIntKeyedArray' => [
                'array<int|string, string|int>',
                [
                    'array{a: int}',
                    'array<int, string>',
                ],
            ],
            'combineNestedObjectTypeWithObjectLikeIntKeyedArray' => [
                'array{a: array<int|string, string|int>}',
                [
                    'array{a: array{a: int}}',
                    'array{a: array<int, string>}',
                ],
            ],
            'combineIntKeyedObjectTypeWithNestedIntKeyedArray' => [
                'array<int, array<int|string, string|int>>',
                [
                    'array<int, array{a:int}>',
                    'array<int, array<int, string>>',
                ],
            ],
            'combineNestedObjectTypeWithNestedIntKeyedArray' => [
                'array<int|string, array<int|string, string|int>>',
                [
                    'array{a: array{a: int}}',
                    'array<int, array<int, string>>',
                ],
            ],
            'combinePossiblyUndefinedKeys' => [
                'array{a: bool, b?: mixed, d?: mixed}',
                [
                    'array{a: false, b: mixed}',
                    'array{a: true, d: mixed}',
                    'array{a: true, d: mixed}',
                ],
            ],
            'combinePossiblyUndefinedKeysAndString' => [
                'array{a: string, b?: int}|string',
                [
                    'array{a: string, b?: int}',
                    'string',
                ],
            ],
            'combineMixedArrayWithObjectLike' => [
                'array<array-key, mixed>',
                [
                    'array{a: int}',
                    'array',
                ],
            ],
            'traversableAorB' => [
                'Traversable<mixed, A|B>',
                [
                    'Traversable<A>',
                    'Traversable<B>',
                ],
            ],
            'iterableAorB' => [
                'iterable<mixed, A|B>',
                [
                    'iterable<A>',
                    'iterable<B>',
                ],
            ],
            'FooAorB' => [
                'Foo<A>|Foo<B>',
                [
                    'Foo<A>',
                    'Foo<B>',
                ],
            ],
            'traversableOfMixed' => [
                'Traversable<mixed, mixed>',
                [
                    'Traversable',
                    'Traversable<mixed, mixed>',
                ],
            ],
            'traversableAndIterator' => [
                'Traversable&Iterator',
                [
                    'Traversable&Iterator',
                    'Traversable&Iterator',
                ],
            ],
            'traversableOfMixedAndIterator' => [
                'Traversable<mixed, mixed>&Iterator',
                [
                    'Traversable<mixed, mixed>&Iterator',
                    'Traversable<mixed, mixed>&Iterator',
                ],
            ],
            'objectLikePlusArrayEqualsArray' => [
                'array<string, int>',
                [
                    'array<"a"|"b"|"c", 1|2|3>',
                    'array{a: 1|2, b: 2|3, c: 1|3}',
                ],
            ],
        ];
    }

    /**
     * @param  string $string
     *
     * @return Type\Atomic
     */
    private static function getAtomic($string)
    {
        return array_values(Type::parseString($string)->getTypes())[0];
    }
}