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<?php |
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declare(strict_types = 1); |
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namespace Tests\Innmind\Immutable; |
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use Innmind\Immutable\Either; |
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use PHPUnit\Framework\TestCase; |
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use Innmind\BlackBox\{ |
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PHPUnit\BlackBox, |
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Set, |
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}; |
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class EitherTest extends TestCase |
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{ |
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use BlackBox; |
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public function testMatchLeft() |
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{ |
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$this |
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->forAll( |
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Set\AnyType::any(), |
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Set\AnyType::any(), |
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) |
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->then(function($left, $right) { |
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$either = Either::left($left); |
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$this->assertSame( |
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$left, |
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$either->match( |
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static fn($value) => $right, |
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function($value) use ($left) { |
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$this->assertSame($left, $value); |
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return $value; |
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}, |
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), |
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); |
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}); |
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} |
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public function testMatchRight() |
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{ |
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$this |
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->forAll( |
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Set\AnyType::any(), |
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Set\AnyType::any(), |
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) |
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->then(function($left, $right) { |
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$either = Either::right($right); |
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$this->assertSame( |
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$right, |
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$either->match( |
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function($value) use ($right) { |
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$this->assertSame($right, $value); |
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return $value; |
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}, |
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static fn($value) => $value, |
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), |
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); |
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}); |
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} |
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public function testLeftValueIsNotMapped() |
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{ |
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$this |
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->forAll(Set\AnyType::any()) |
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->then(function($initial) { |
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$either = Either::left($initial)->map(static function() { |
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throw new \Exception; |
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}); |
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$this->assertInstanceOf(Either::class, $either); |
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$this->assertSame( |
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$initial, |
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$either->match( |
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static fn($value) => $value, |
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static fn($value) => $value, |
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), |
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); |
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}); |
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} |
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public function testRightValueIsMapped() |
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{ |
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$this |
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->forAll( |
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Set\AnyType::any(), |
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Set\AnyType::any(), |
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) |
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->then(function($initial, $mapped) { |
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$either = Either::right($initial)->map(function($value) use ($initial, $mapped) { |
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$this->assertSame($initial, $value); |
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return $mapped; |
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}); |
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$this->assertInstanceOf(Either::class, $either); |
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$this->assertSame( |
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$mapped, |
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$either->match( |
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static fn($value) => $value, |
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static fn($value) => $value, |
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), |
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); |
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}); |
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} |
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public function testLeftValueIsNotFlatMapped() |
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{ |
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$this |
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->forAll(Set\AnyType::any()) |
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->then(function($left) { |
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$either = Either::left($left)->flatMap(static function() { |
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throw new \Exception; |
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}); |
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$this->assertInstanceOf(Either::class, $either); |
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$this->assertSame( |
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$left, |
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$either->match( |
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static fn($value) => $value, |
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static fn($value) => $value, |
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), |
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); |
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}); |
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} |
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public function testRightValueIsFlatMapped() |
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{ |
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$this |
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->forAll( |
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Set\AnyType::any(), |
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new Set\Either( |
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Set\Decorate::immutable( |
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static fn($value) => Either::left($value), |
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Set\AnyType::any(), |
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), |
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Set\Decorate::immutable( |
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static fn($value) => Either::right($value), |
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Set\AnyType::any(), |
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), |
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), |
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) |
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->then(function($right, $expected) { |
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$either = Either::right($right)->flatMap(function($value) use ($right, $expected) { |
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$this->assertSame($right, $value); |
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return $expected; |
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}); |
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$this->assertSame($expected, $either); |
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}); |
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} |
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public function testOtherwiseIsCalledWhenLeftValue() |
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{ |
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$this |
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->forAll( |
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Set\AnyType::any(), |
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new Set\Either( |
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Set\Decorate::immutable( |
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static fn($value) => Either::left($value), |
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Set\AnyType::any(), |
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), |
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Set\Decorate::immutable( |
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static fn($value) => Either::right($value), |
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Set\AnyType::any(), |
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), |
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), |
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) |
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->then(function($left, $expected) { |
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$either = Either::left($left)->otherwise(static fn() => $expected); |
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$this->assertSame($expected, $either); |
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}); |
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} |
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public function testOtherwiseIsNotCalledWhenRightValue() |
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{ |
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$this |
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->forAll( |
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Set\AnyType::any(), |
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Set\AnyType::any(), |
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) |
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->then(function($right, $left) { |
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$either = Either::right($right)->otherwise(static function() { |
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throw new \Exception; |
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}); |
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$this->assertInstanceOf(Either::class, $either); |
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$this->assertSame( |
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$right, |
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$either->match( |
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static fn($value) => $value, |
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static fn() => $left, |
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), |
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); |
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}); |
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} |
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public function testKeepSameValueWhenFilteringLeftValue() |
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{ |
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$this |
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->forAll( |
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Set\AnyType::any(), |
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Set\AnyType::any(), |
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Set\Elements::of(true, false), |
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Set\AnyType::any(), |
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) |
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->then(function($left, $right, $predicate, $otherwise) { |
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$either = Either::left($left)->filter( |
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static fn() => $predicate, |
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static fn() => $otherwise, |
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); |
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$this->assertInstanceOf(Either::class, $either); |
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$this->assertSame( |
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$left, |
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$either->match( |
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static fn() => $right, |
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static fn($value) => $value, |
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), |
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); |
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}); |
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} |
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public function testKeepSameValueWhenRightValueMatchPredicate() |
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{ |
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$this |
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->forAll( |
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Set\AnyType::any(), |
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Set\AnyType::any(), |
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Set\AnyType::any(), |
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) |
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->then(function($right, $left, $otherwise) { |
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$either = Either::right($right)->filter( |
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function($value) use ($right) { |
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$this->assertSame($right, $value); |
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return true; |
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}, |
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static fn() => $otherwise, |
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); |
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$this->assertInstanceOf(Either::class, $either); |
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$this->assertSame( |
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$right, |
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$either->match( |
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static fn($value) => $value, |
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static fn() => $left, |
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), |
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); |
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}); |
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} |
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public function testUseOtherValueWhenRightValueDoesntMatchPredicate() |
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{ |
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$this |
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->forAll( |
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Set\AnyType::any(), |
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Set\AnyType::any(), |
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Set\AnyType::any(), |
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) |
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->then(function($right, $unwanted, $otherwise) { |
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$either = Either::right($right)->filter( |
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function($value) use ($right) { |
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$this->assertSame($right, $value); |
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return false; |
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}, |
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static fn() => $otherwise, |
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); |
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$this->assertInstanceOf(Either::class, $either); |
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$this->assertSame( |
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$otherwise, |
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$either->match( |
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static fn($value) => $unwanted, |
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static fn($value) => $value, |
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), |
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); |
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}); |
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} |
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public function testRightValueIsNotLeftMapped() |
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{ |
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$this |
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->forAll(Set\AnyType::any()) |
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->then(function($initial) { |
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$either = Either::right($initial)->leftMap(static function() { |
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throw new \Exception; |
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}); |
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$this->assertInstanceOf(Either::class, $either); |
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$this->assertSame( |
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$initial, |
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$either->match( |
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static fn($value) => $value, |
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static fn($value) => $value, |
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), |
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); |
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}); |
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} |
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public function testLeftValueIsLeftMapped() |
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{ |
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$this |
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->forAll( |
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Set\AnyType::any(), |
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Set\AnyType::any(), |
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) |
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->then(function($initial, $mapped) { |
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$either = Either::left($initial)->leftMap(function($value) use ($initial, $mapped) { |
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$this->assertSame($initial, $value); |
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return $mapped; |
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}); |
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321
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$this->assertInstanceOf(Either::class, $either); |
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$this->assertSame( |
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$mapped, |
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$either->match( |
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static fn($value) => $value, |
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static fn($value) => $value, |
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), |
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); |
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}); |
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} |
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public function testMaybe() |
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333
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{ |
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$this |
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->forAll( |
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Set\AnyType::any(), |
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Set\AnyType::any(), |
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338
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) |
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339
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->then(function($left, $right) { |
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340
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$this->assertSame( |
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$right, |
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342
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Either::right($right)->maybe()->match( |
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343
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static fn($value) => $value, |
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static fn() => null, |
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345
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), |
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346
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); |
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347
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$this->assertNull( |
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348
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Either::left($left)->maybe()->match( |
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349
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static fn($value) => $value, |
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350
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static fn() => null, |
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351
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), |
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); |
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353
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|
}); |
|
354
|
|
|
} |
|
355
|
|
|
} |
|
356
|
|
|
|
Innmind /
Immutable
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This check looks for parameters that have been defined for a function or method, but which are not used in the method body.