DeferTest::testContains() - Code Metrics - Inspection of "Merge branch 'develop'" - Innmind/Immutable - Measure and Improve Code Quality continuously with Scrutinizer

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by Baptiste

created 2019-12-10 17:51 UTC

DeferTest::testContains() A

↳ Parent: DeferTest

Complexity

Conditions	1
Paths	1

Size

Total Lines	10
Code Lines	6

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	1

Metric	Value
cc	1
eloc	6
c	1
b	0
f	1
nc	1
nop	0
dl	0
loc	10
rs	10

<?php
declare(strict_types = 1);

namespace Tests\Innmind\Immutable\Sequence;

use Innmind\Immutable\{
    Sequence\Defer,
filter:
    dependency_paths: ["lib/*"]
    Sequence\Implementation,
    Map,
    Sequence,
    Str,
    Set,
    Exception\OutOfBoundException,
    Exception\CannotGroupEmptyStructure,
    Exception\ElementNotFound,
};
use function Innmind\Immutable\unwrap;
use PHPUnit\Framework\TestCase;

class DeferTest extends TestCase
{
    public function testInterface()
    {
        $this->assertInstanceOf(
            Implementation::class,
            new Defer('mixed', (fn() => yield)()),
        );
    }

    public function testGeneratorNotLoadedAtInstanciation()
    {
        $loaded = false;
        $sequence = new Defer('int', (function() use (&$loaded) {

            yield 1;
            $loaded = true;
        })());

        $this->assertFalse($loaded);
    }

    public function testThrowWhenYieldingInvalidType()
    {
        $this->expectException(\TypeError::class);
        $this->expectExceptionMessage('Argument 1 must be of type int, string given');

        $sequence = new Defer('int', (function() {
            yield '1';
        })());
        \iterator_to_array($sequence->iterator());
    }

    public function testType()
    {
        $this->assertSame('int', (new Defer('int', (fn() => yield)()))->type());
    }

    public function testSize()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 1;
        })());

        $this->assertSame(2, $sequence->size());
        $this->assertSame(2, $sequence->count());
    }

    public function testIterator()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
        })());

        $this->assertSame(
            [1, 2, 3],
            \iterator_to_array($sequence->iterator()),
        );
    }

    public function testGet()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 42;
            yield 3;
        })());

        $this->assertSame(42, $sequence->get(1));
    }

    public function testThrowWhenIndexNotFound()
    {
        $this->expectException(OutOfBoundException::class);

        $sequence = new Defer('int', (function() {
            if (false) {
                yield 1;
            }
        })());

        $sequence->get(0);
    }

    public function testDiff()
    {
        $aLoaded = false;
        $bLoaded = false;
        $a = new Defer('int', (function() use (&$aLoaded) {
            yield 1;
            yield 2;
            $aLoaded = true;
        })());
        $b = new Defer('int', (function() use (&$bLoaded) {
            yield 2;
            yield 3;
            $bLoaded = true;
        })());
        $c = $a->diff($b);

        $this->assertFalse($aLoaded);
        $this->assertFalse($bLoaded);
        $this->assertSame([1, 2], \iterator_to_array($a->iterator()));
        $this->assertSame([2, 3], \iterator_to_array($b->iterator()));
        $this->assertInstanceOf(Defer::class, $c);
        $this->assertSame([1], \iterator_to_array($c->iterator()));
        $this->assertTrue($aLoaded);
        $this->assertTrue($bLoaded);
    }

    public function testDistinct()
    {
        $loaded = false;
        $a = new Defer('int', (function() use (&$loaded) {
            yield 1;
            yield 2;
            yield 1;
            $loaded = true;
        })());
        $b = $a->distinct();

        $this->assertFalse($loaded);
        $this->assertSame([1, 2, 1], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertSame([1, 2], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testDrop()
    {
        $loaded = false;
        $a = new Defer('int', (function() use (&$loaded) {
            yield 1;
            yield 2;
            yield 3;
            yield 4;
            $loaded = true;
        })());
        $b = $a->drop(2);

        $this->assertFalse($loaded);
        $this->assertSame([1, 2, 3, 4], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertSame([3, 4], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testDropEnd()
    {
        $a = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
            yield 4;
        })());
        $b = $a->dropEnd(2);

        $this->assertSame([1, 2, 3, 4], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Implementation::class, $b);
        $this->assertSame([1, 2], \iterator_to_array($b->iterator()));
    }

    public function testEquals()
    {
        $a = new Defer('int', (function() {
            yield 1;
            yield 2;
        })());
        $b = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
        })());
        $this->assertTrue($a->equals($a));
        $this->assertFalse($a->equals($b));
    }

    public function testFilter()
    {
        $loaded = false;
        $a = new Defer('int', (function() use (&$loaded) {
            yield 1;
            yield 2;
            yield 3;
            yield 4;
            $loaded = true;
        })());
        $b = $a->filter(fn($i) => $i % 2 === 0);

        $this->assertFalse($loaded);
        $this->assertSame([1, 2, 3, 4], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertSame([2, 4], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testForeach()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
            yield 4;
        })());
        $calls = 0;
        $sum = 0;

        $this->assertNull($sequence->foreach(function($i) use (&$calls, &$sum) {
            ++$calls;
            $sum += $i;
        }));
        $this->assertSame(4, $calls);
        $this->assertSame(10, $sum);
    }

    public function testThrowWhenTryingToGroupEmptySequence()
    {
        $this->expectException(CannotGroupEmptyStructure::class);

        $sequence = new Defer('int', (function() {
            if (false) {
                yield 1;
            }
        })());

        $sequence->groupBy(fn($i) => $i);
    }

    public function testGroupBy()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
            yield 4;
        })());
        $groups = $sequence->groupBy(fn($i) => $i % 2);

        $this->assertSame([1, 2, 3, 4], \iterator_to_array($sequence->iterator()));
        $this->assertInstanceOf(Map::class, $groups);
        $this->assertTrue($groups->isOfType('int', Sequence::class));
        $this->assertCount(2, $groups);
        $this->assertTrue($groups->get(0)->isOfType('int'));
        $this->assertTrue($groups->get(1)->isOfType('int'));
        $this->assertSame([2, 4], unwrap($groups->get(0)));
        $this->assertSame([1, 3], unwrap($groups->get(1)));
    }

    public function testThrowWhenTryingToAccessFirstElementOnEmptySequence()
    {
        $this->expectException(OutOfBoundException::class);

        $sequence = new Defer('int', (function() {
            if (false) {
                yield 1;
            }
        })());

        $sequence->first();
    }

    public function testThrowWhenTryingToAccessLastElementOnEmptySequence()
    {
        $this->expectException(OutOfBoundException::class);

        $sequence = new Defer('int', (function() {
            if (false) {
                yield 1;
            }
        })());

        $sequence->last();
    }

    public function testFirst()
    {
        $sequence = new Defer('int', (function() {
            yield 2;
            yield 3;
            yield 4;
        })());

        $this->assertSame(2, $sequence->first());
    }

    public function testLast()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
        })());

        $this->assertSame(3, $sequence->last());
    }

    public function testContains()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
        })());

        $this->assertTrue($sequence->contains(2));
        $this->assertFalse($sequence->contains(4));
    }

    public function testIndexOf()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 4;
        })());

        $this->assertSame(1, $sequence->indexOf(2));
        $this->assertSame(2, $sequence->indexOf(4));
    }

    public function testThrowWhenTryingToAccessIndexOfUnknownValue()
    {
        $this->expectException(ElementNotFound::class);

        $sequence = new Defer('int', (function() {
            if (false) {
                yield 1;
            }
        })());

        $sequence->indexOf(1);
    }

    public function testIndices()
    {
        $loaded = false;
        $a = new Defer('string', (function() use (&$loaded) {
            yield '1';
            yield '2';
            $loaded = true;
        })());
        $b = $a->indices();

        $this->assertFalse($loaded);
        $this->assertSame(['1', '2'], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertSame('int', $b->type());
        $this->assertSame([0, 1], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testIndicesOnEmptySequence()
    {
        $a = new Defer('string', (function() {
            if (false) {
                yield 1;
            }
        })());
        $b = $a->indices();

        $this->assertSame([], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertSame('int', $b->type());
        $this->assertSame([], \iterator_to_array($b->iterator()));
    }

    public function testMap()
    {
        $loaded = false;
        $a = new Defer('int', (function() use (&$loaded) {
            yield 1;
            yield 2;
            yield 3;
            $loaded = true;
        })());
        $b = $a->map(fn($i) => $i * 2);

        $this->assertFalse($loaded);
        $this->assertSame([1, 2, 3], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertSame([2, 4, 6], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testThrowWhenTryingToModifyTheTypeWhenMapping()
    {
        $this->expectException(\TypeError::class);
        $this->expectExceptionMessage('Argument 1 must be of type int, string given');

        $sequence = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
        })());

        \iterator_to_array($sequence->map(fn($i) => (string) $i)->iterator());
    }

    public function testPad()
    {
        $loaded = false;
        $a = new Defer('int', (function() use (&$loaded) {
            yield 1;
            yield 2;
            $loaded = true;
        })());
        $b = $a->pad(4, 0);
        $c = $a->pad(1, 0);

        $this->assertFalse($loaded);
        $this->assertSame([1, 2], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertInstanceOf(Defer::class, $c);
        $this->assertSame([1, 2, 0, 0], \iterator_to_array($b->iterator()));
        $this->assertSame([1, 2], \iterator_to_array($c->iterator()));
        $this->assertTrue($loaded);
    }

    public function testPartition()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
            yield 4;
        })());
        $partition = $sequence->partition(fn($i) => $i % 2 === 0);

        $this->assertSame([1, 2, 3, 4], \iterator_to_array($sequence->iterator()));
        $this->assertInstanceOf(Map::class, $partition);
        $this->assertTrue($partition->isOfType('bool', Sequence::class));
        $this->assertCount(2, $partition);
        $this->assertTrue($partition->get(true)->isOfType('int'));
        $this->assertTrue($partition->get(false)->isOfType('int'));
        $this->assertSame([2, 4], unwrap($partition->get(true)));
        $this->assertSame([1, 3], unwrap($partition->get(false)));
    }

    public function testSlice()
    {
        $loaded = false;
        $a = new Defer('int', (function() use (&$loaded) {
            yield 2;
            yield 3;
            yield 4;
            yield 5;
            $loaded = true;
        })());
        $b = $a->slice(1, 3);

        $this->assertFalse($loaded);
        $this->assertSame([2, 3, 4, 5], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertSame([3, 4], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testSplitAt()
    {
        $sequence = new Defer('int', (function() {
            yield 2;
            yield 3;
            yield 4;
            yield 5;
        })());
        $parts = $sequence->splitAt(2);

        $this->assertSame([2, 3, 4, 5], \iterator_to_array($sequence->iterator()));
        $this->assertInstanceOf(Sequence::class, $parts);
        $this->assertTrue($parts->isOfType(Sequence::class));
        $this->assertCount(2, $parts);
        $this->assertTrue($parts->first()->isOfType('int'));
        $this->assertTrue($parts->last()->isOfType('int'));
        $this->assertSame([2, 3], unwrap($parts->first()));
        $this->assertSame([4, 5], unwrap($parts->last()));
    }

    public function testTake()
    {
        $loaded = false;
        $a = new Defer('int', (function() use (&$loaded) {
            yield 2;
            yield 3;
            yield 4;
            $loaded = true;
        })());
        $b = $a->take(2);

        $this->assertFalse($loaded);
        $this->assertSame([2, 3, 4], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertSame([2, 3], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testTakeEnd()
    {
        $a = new Defer('int', (function() {
            yield 2;
            yield 3;
            yield 4;
        })());
        $b = $a->takeEnd(2);

        $this->assertSame([2, 3, 4], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Implementation::class, $b);
        $this->assertSame([3, 4], \iterator_to_array($b->iterator()));
    }

    public function testAppend()
    {
        $aLoaded = false;
        $bLoaded = false;
        $a = new Defer('int', (function() use (&$aLoaded) {
            yield 1;
            yield 2;
            $aLoaded = true;
        })());
        $b = new Defer('int', (function() use (&$bLoaded) {
            yield 3;
            yield 4;
            $bLoaded = true;
        })());
        $c = $a->append($b);

        $this->assertFalse($aLoaded);
        $this->assertFalse($bLoaded);
        $this->assertSame([1, 2], \iterator_to_array($a->iterator()));
        $this->assertSame([3, 4], \iterator_to_array($b->iterator()));
        $this->assertInstanceOf(Defer::class, $c);
        $this->assertSame([1, 2, 3, 4], \iterator_to_array($c->iterator()));
        $this->assertTrue($aLoaded);
        $this->assertTrue($bLoaded);
    }

    public function testIntersect()
    {
        $aLoaded = false;
        $bLoaded = false;
        $a = new Defer('int', (function() use (&$aLoaded) {
            yield 1;
            yield 2;
            $aLoaded = true;
        })());
        $b = new Defer('int', (function() use (&$bLoaded) {
            yield 2;
            yield 3;
            $bLoaded = true;
        })());
        $c = $a->intersect($b);

        $this->assertFalse($aLoaded);
        $this->assertFalse($bLoaded);
        $this->assertSame([1, 2], \iterator_to_array($a->iterator()));
        $this->assertSame([2, 3], \iterator_to_array($b->iterator()));
        $this->assertInstanceOf(Defer::class, $c);
        $this->assertSame([2], \iterator_to_array($c->iterator()));
        $this->assertTrue($aLoaded);
        $this->assertTrue($bLoaded);
    }

    public function testAdd()
    {
        $loaded = false;
        $a = new Defer('int', (function() use (&$loaded) {
            yield 1;
            $loaded = true;
        })());
        $b = ($a)(2);

        $this->assertFalse($loaded);
        $this->assertSame([1], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertSame([1, 2], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testSort()
    {
        $a = new Defer('int', (function() {
            yield 1;
            yield 4;
            yield 3;
            yield 2;
        })());
        $b = $a->sort(fn($a, $b) => $a > $b);

        $this->assertSame([1, 4, 3, 2], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertSame([1, 2, 3, 4], \iterator_to_array($b->iterator()));
    }

    public function testReduce()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
            yield 4;
        })());

        $this->assertSame(10, $sequence->reduce(0, fn($sum, $i) => $sum + $i));
    }

    public function testClear()
    {
        $loaded = false;
        $a = new Defer('int', (function() use (&$loaded) {
            yield 1;
            yield 2;
           $loaded = true;
        })());
        $b = $a->clear();

        $this->assertFalse($loaded);
        $this->assertInstanceOf(Implementation::class, $b);
        $this->assertSame([], \iterator_to_array($b->iterator()));
        $this->assertFalse($loaded);
        $this->assertSame([1, 2], \iterator_to_array($a->iterator()));
    }

    public function testReverse()
    {
        $loaded = false;
        $a = new Defer('int', (function() use (&$loaded) {
            yield 1;
            yield 2;
            yield 3;
            yield 4;
            $loaded = true;
        })());
        $b = $a->reverse();

        $this->assertFalse($loaded);
        $this->assertSame([1, 2, 3, 4], \iterator_to_array($a->iterator()));
        $this->assertInstanceOf(Defer::class, $b);
        $this->assertSame([4, 3, 2, 1], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testEmpty()
    {
        $aLoaded = false;
        $bLoaded = false;
        $a = new Defer('int', (function() use (&$aLoaded) {
            yield 1;
            $aLoaded = true;
        })());
        $b = new Defer('int', (function() use (&$bLoaded) {
            if (false) {
                yield 1;
            }
            $bLoaded = true;
        })());

        $this->assertFalse($aLoaded);
        $this->assertFalse($bLoaded);
        $this->assertTrue($b->empty());
        $this->assertFalse($a->empty());
        $this->assertFalse($aLoaded); // still false as we don't need to load the full iterator to know if it's empty
        $this->assertTrue($bLoaded);
    }

    public function testToSequenceOf()
    {
        $loaded = false;
        $sequence = new Defer('int', (function() use (&$loaded) {
            yield 1;
            yield 2;
            yield 3;
            $loaded = true;
        })());
        $sequence = $sequence->toSequenceOf('string|int', function($i) {
            yield (string) $i;
            yield $i;
        });

        $this->assertFalse($loaded);
        $this->assertInstanceOf(Sequence::class, $sequence);
        $this->assertSame(
            ['1', 1, '2', 2, '3', 3],
            unwrap($sequence),
        );
        $this->assertTrue($loaded);
    }

    public function testToSetOf()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
        })());
        $set = $sequence->toSetOf('string|int', function($i) {
            yield (string) $i;
            yield $i;
        });

        $this->assertInstanceOf(Set::class, $set);
        $this->assertSame(
            ['1', 1, '2', 2, '3', 3],
            unwrap($set),
        );
    }

    public function testToMapOf()
    {
        $sequence = new Defer('int', (function() {
            yield 1;
            yield 2;
            yield 3;
        })());
        $map = $sequence->toMapOf('string', 'int', fn($i) => yield (string) $i => $i);

        $this->assertInstanceOf(Map::class, $map);
        $this->assertCount(3, $map);
        $this->assertSame(1, $map->get('1'));
        $this->assertSame(2, $map->get('2'));
        $this->assertSame(3, $map->get('3'));
    }
}


1			<?php
2			declare(strict_types = 1);
3
4			namespace Tests\Innmind\Immutable\Sequence;
5
6			use Innmind\Immutable\{
7			Sequence\Defer,
			0 ignored issues – show Bug introduced 2019-12-08 17:26 UTC by Report Bug Copy Issue Report The type `Innmind\Immutable\Sequence\Defer` was not found. Maybe you did not declare it correctly or list all dependencies? The issue could also be caused by a filter entry in the build configuration. If the path has been excluded in your configuration, e.g. `excluded_paths: ["lib/"]`, you can move it to the dependency path list as follows: filter: dependency_paths: ["lib/"] For further information see https://scrutinizer-ci.com/docs/tools/php/php-scrutinizer/#list-dependency-paths Loading history...
8			Sequence\Implementation,
9			Map,
10			Sequence,
11			Str,
12			Set,
13			Exception\OutOfBoundException,
14			Exception\CannotGroupEmptyStructure,
15			Exception\ElementNotFound,
16			};
17			use function Innmind\Immutable\unwrap;
18			use PHPUnit\Framework\TestCase;
19
20			class DeferTest extends TestCase
21			{
22			public function testInterface()
23			{
24			$this->assertInstanceOf(
25			Implementation::class,
26			new Defer('mixed', (fn() => yield)()),
27			);
28			}
29
30			public function testGeneratorNotLoadedAtInstanciation()
31			{
32			$loaded = false;
33			$sequence = new Defer('int', (function() use (&$loaded) {
			0 ignored issues – show Unused Code introduced 2019-12-08 17:26 UTC by Report Bug Copy Issue Report The assignment to `$sequence` is dead and can be removed. Loading history...
34			yield 1;
35			$loaded = true;
36			})());
37
38			$this->assertFalse($loaded);
39			}
40
41			public function testThrowWhenYieldingInvalidType()
42			{
43			$this->expectException(\TypeError::class);
44			$this->expectExceptionMessage('Argument 1 must be of type int, string given');
45
46			$sequence = new Defer('int', (function() {
47			yield '1';
48			})());
49			\iterator_to_array($sequence->iterator());
50			}
51
52			public function testType()
53			{
54			$this->assertSame('int', (new Defer('int', (fn() => yield)()))->type());
55			}
56
57			public function testSize()
58			{
59			$sequence = new Defer('int', (function() {
60			yield 1;
61			yield 1;
62			})());
63
64			$this->assertSame(2, $sequence->size());
65			$this->assertSame(2, $sequence->count());
66			}
67
68			public function testIterator()
69			{
70			$sequence = new Defer('int', (function() {
71			yield 1;
72			yield 2;
73			yield 3;
74			})());
75
76			$this->assertSame(
77			[1, 2, 3],
78			\iterator_to_array($sequence->iterator()),
79			);
80			}
81
82			public function testGet()
83			{
84			$sequence = new Defer('int', (function() {
85			yield 1;
86			yield 42;
87			yield 3;
88			})());
89
90			$this->assertSame(42, $sequence->get(1));
91			}
92
93			public function testThrowWhenIndexNotFound()
94			{
95			$this->expectException(OutOfBoundException::class);
96
97			$sequence = new Defer('int', (function() {
98			if (false) {
99			yield 1;
100			}
101			})());
102
103			$sequence->get(0);
104			}
105
106			public function testDiff()
107			{
108			$aLoaded = false;
109			$bLoaded = false;
110			$a = new Defer('int', (function() use (&$aLoaded) {
111			yield 1;
112			yield 2;
113			$aLoaded = true;
114			})());
115			$b = new Defer('int', (function() use (&$bLoaded) {
116			yield 2;
117			yield 3;
118			$bLoaded = true;
119			})());
120			$c = $a->diff($b);
121
122			$this->assertFalse($aLoaded);
123			$this->assertFalse($bLoaded);
124			$this->assertSame([1, 2], \iterator_to_array($a->iterator()));
125			$this->assertSame([2, 3], \iterator_to_array($b->iterator()));
126			$this->assertInstanceOf(Defer::class, $c);
127			$this->assertSame([1], \iterator_to_array($c->iterator()));
128			$this->assertTrue($aLoaded);
129			$this->assertTrue($bLoaded);
130			}
131
132			public function testDistinct()
133			{
134			$loaded = false;
135			$a = new Defer('int', (function() use (&$loaded) {
136			yield 1;
137			yield 2;
138			yield 1;
139			$loaded = true;
140			})());
141			$b = $a->distinct();
142
143			$this->assertFalse($loaded);
144			$this->assertSame([1, 2, 1], \iterator_to_array($a->iterator()));
145			$this->assertInstanceOf(Defer::class, $b);
146			$this->assertSame([1, 2], \iterator_to_array($b->iterator()));
147			$this->assertTrue($loaded);
148			}
149
150			public function testDrop()
151			{
152			$loaded = false;
153			$a = new Defer('int', (function() use (&$loaded) {
154			yield 1;
155			yield 2;
156			yield 3;
157			yield 4;
158			$loaded = true;
159			})());
160			$b = $a->drop(2);
161
162			$this->assertFalse($loaded);
163			$this->assertSame([1, 2, 3, 4], \iterator_to_array($a->iterator()));
164			$this->assertInstanceOf(Defer::class, $b);
165			$this->assertSame([3, 4], \iterator_to_array($b->iterator()));
166			$this->assertTrue($loaded);
167			}
168
169			public function testDropEnd()
170			{
171			$a = new Defer('int', (function() {
172			yield 1;
173			yield 2;
174			yield 3;
175			yield 4;
176			})());
177			$b = $a->dropEnd(2);
178
179			$this->assertSame([1, 2, 3, 4], \iterator_to_array($a->iterator()));
180			$this->assertInstanceOf(Implementation::class, $b);
181			$this->assertSame([1, 2], \iterator_to_array($b->iterator()));
182			}
183
184			public function testEquals()
185			{
186			$a = new Defer('int', (function() {
187			yield 1;
188			yield 2;
189			})());
190			$b = new Defer('int', (function() {
191			yield 1;
192			yield 2;
193			yield 3;
194			})());
195			$this->assertTrue($a->equals($a));
196			$this->assertFalse($a->equals($b));
197			}
198
199			public function testFilter()
200			{
201			$loaded = false;
202			$a = new Defer('int', (function() use (&$loaded) {
203			yield 1;
204			yield 2;
205			yield 3;
206			yield 4;
207			$loaded = true;
208			})());
209			$b = $a->filter(fn($i) => $i % 2 === 0);
210
211			$this->assertFalse($loaded);
212			$this->assertSame([1, 2, 3, 4], \iterator_to_array($a->iterator()));
213			$this->assertInstanceOf(Defer::class, $b);
214			$this->assertSame([2, 4], \iterator_to_array($b->iterator()));
215			$this->assertTrue($loaded);
216			}
217
218			public function testForeach()
219			{
220			$sequence = new Defer('int', (function() {
221			yield 1;
222			yield 2;
223			yield 3;
224			yield 4;
225			})());
226			$calls = 0;
227			$sum = 0;
228
229			$this->assertNull($sequence->foreach(function($i) use (&$calls, &$sum) {
230			++$calls;
231			$sum += $i;
232			}));
233			$this->assertSame(4, $calls);
234			$this->assertSame(10, $sum);
235			}
236
237			public function testThrowWhenTryingToGroupEmptySequence()
238			{
239			$this->expectException(CannotGroupEmptyStructure::class);
240
241			$sequence = new Defer('int', (function() {
242			if (false) {
243			yield 1;
244			}
245			})());
246
247			$sequence->groupBy(fn($i) => $i);
248			}
249
250			public function testGroupBy()
251			{
252			$sequence = new Defer('int', (function() {
253			yield 1;
254			yield 2;
255			yield 3;
256			yield 4;
257			})());
258			$groups = $sequence->groupBy(fn($i) => $i % 2);
259
260			$this->assertSame([1, 2, 3, 4], \iterator_to_array($sequence->iterator()));
261			$this->assertInstanceOf(Map::class, $groups);
262			$this->assertTrue($groups->isOfType('int', Sequence::class));
263			$this->assertCount(2, $groups);
264			$this->assertTrue($groups->get(0)->isOfType('int'));
265			$this->assertTrue($groups->get(1)->isOfType('int'));
266			$this->assertSame([2, 4], unwrap($groups->get(0)));
267			$this->assertSame([1, 3], unwrap($groups->get(1)));
268			}
269
270			public function testThrowWhenTryingToAccessFirstElementOnEmptySequence()
271			{
272			$this->expectException(OutOfBoundException::class);
273
274			$sequence = new Defer('int', (function() {
275			if (false) {
276			yield 1;
277			}
278			})());
279
280			$sequence->first();
281			}
282
283			public function testThrowWhenTryingToAccessLastElementOnEmptySequence()
284			{
285			$this->expectException(OutOfBoundException::class);
286
287			$sequence = new Defer('int', (function() {
288			if (false) {
289			yield 1;
290			}
291			})());
292
293			$sequence->last();
294			}
295
296			public function testFirst()
297			{
298			$sequence = new Defer('int', (function() {
299			yield 2;
300			yield 3;
301			yield 4;
302			})());
303
304			$this->assertSame(2, $sequence->first());
305			}
306
307			public function testLast()
308			{
309			$sequence = new Defer('int', (function() {
310			yield 1;
311			yield 2;
312			yield 3;
313			})());
314
315			$this->assertSame(3, $sequence->last());
316			}
317
318			public function testContains()
319			{
320			$sequence = new Defer('int', (function() {
321			yield 1;
322			yield 2;
323			yield 3;
324			})());
325
326			$this->assertTrue($sequence->contains(2));
327			$this->assertFalse($sequence->contains(4));
328			}
329
330			public function testIndexOf()
331			{
332			$sequence = new Defer('int', (function() {
333			yield 1;
334			yield 2;
335			yield 4;
336			})());
337
338			$this->assertSame(1, $sequence->indexOf(2));
339			$this->assertSame(2, $sequence->indexOf(4));
340			}
341
342			public function testThrowWhenTryingToAccessIndexOfUnknownValue()
343			{
344			$this->expectException(ElementNotFound::class);
345
346			$sequence = new Defer('int', (function() {
347			if (false) {
348			yield 1;
349			}
350			})());
351
352			$sequence->indexOf(1);
353			}
354
355			public function testIndices()
356			{
357			$loaded = false;
358			$a = new Defer('string', (function() use (&$loaded) {
359			yield '1';
360			yield '2';
361			$loaded = true;
362			})());
363			$b = $a->indices();
364
365			$this->assertFalse($loaded);
366			$this->assertSame(['1', '2'], \iterator_to_array($a->iterator()));
367			$this->assertInstanceOf(Defer::class, $b);
368			$this->assertSame('int', $b->type());
369			$this->assertSame([0, 1], \iterator_to_array($b->iterator()));
370			$this->assertTrue($loaded);
371			}
372
373			public function testIndicesOnEmptySequence()
374			{
375			$a = new Defer('string', (function() {
376			if (false) {
377			yield 1;
378			}
379			})());
380			$b = $a->indices();
381
382			$this->assertSame([], \iterator_to_array($a->iterator()));
383			$this->assertInstanceOf(Defer::class, $b);
384			$this->assertSame('int', $b->type());
385			$this->assertSame([], \iterator_to_array($b->iterator()));
386			}
387
388			public function testMap()
389			{
390			$loaded = false;
391			$a = new Defer('int', (function() use (&$loaded) {
392			yield 1;
393			yield 2;
394			yield 3;
395			$loaded = true;
396			})());
397			$b = $a->map(fn($i) => $i * 2);
398
399			$this->assertFalse($loaded);
400			$this->assertSame([1, 2, 3], \iterator_to_array($a->iterator()));
401			$this->assertInstanceOf(Defer::class, $b);
402			$this->assertSame([2, 4, 6], \iterator_to_array($b->iterator()));
403			$this->assertTrue($loaded);
404			}
405
406			public function testThrowWhenTryingToModifyTheTypeWhenMapping()
407			{
408			$this->expectException(\TypeError::class);
409			$this->expectExceptionMessage('Argument 1 must be of type int, string given');
410
411			$sequence = new Defer('int', (function() {
412			yield 1;
413			yield 2;
414			yield 3;
415			})());
416
417			\iterator_to_array($sequence->map(fn($i) => (string) $i)->iterator());
418			}
419
420			public function testPad()
421			{
422			$loaded = false;
423			$a = new Defer('int', (function() use (&$loaded) {
424			yield 1;
425			yield 2;
426			$loaded = true;
427			})());
428			$b = $a->pad(4, 0);
429			$c = $a->pad(1, 0);
430
431			$this->assertFalse($loaded);
432			$this->assertSame([1, 2], \iterator_to_array($a->iterator()));
433			$this->assertInstanceOf(Defer::class, $b);
434			$this->assertInstanceOf(Defer::class, $c);
435			$this->assertSame([1, 2, 0, 0], \iterator_to_array($b->iterator()));
436			$this->assertSame([1, 2], \iterator_to_array($c->iterator()));
437			$this->assertTrue($loaded);
438			}
439
440			public function testPartition()
441			{
442			$sequence = new Defer('int', (function() {
443			yield 1;
444			yield 2;
445			yield 3;
446			yield 4;
447			})());
448			$partition = $sequence->partition(fn($i) => $i % 2 === 0);
449
450			$this->assertSame([1, 2, 3, 4], \iterator_to_array($sequence->iterator()));
451			$this->assertInstanceOf(Map::class, $partition);
452			$this->assertTrue($partition->isOfType('bool', Sequence::class));
453			$this->assertCount(2, $partition);
454			$this->assertTrue($partition->get(true)->isOfType('int'));
455			$this->assertTrue($partition->get(false)->isOfType('int'));
456			$this->assertSame([2, 4], unwrap($partition->get(true)));
457			$this->assertSame([1, 3], unwrap($partition->get(false)));
458			}
459
460			public function testSlice()
461			{
462			$loaded = false;
463			$a = new Defer('int', (function() use (&$loaded) {
464			yield 2;
465			yield 3;
466			yield 4;
467			yield 5;
468			$loaded = true;
469			})());
470			$b = $a->slice(1, 3);
471
472			$this->assertFalse($loaded);
473			$this->assertSame([2, 3, 4, 5], \iterator_to_array($a->iterator()));
474			$this->assertInstanceOf(Defer::class, $b);
475			$this->assertSame([3, 4], \iterator_to_array($b->iterator()));
476			$this->assertTrue($loaded);
477			}
478
479			public function testSplitAt()
480			{
481			$sequence = new Defer('int', (function() {
482			yield 2;
483			yield 3;
484			yield 4;
485			yield 5;
486			})());
487			$parts = $sequence->splitAt(2);
488
489			$this->assertSame([2, 3, 4, 5], \iterator_to_array($sequence->iterator()));
490			$this->assertInstanceOf(Sequence::class, $parts);
491			$this->assertTrue($parts->isOfType(Sequence::class));
492			$this->assertCount(2, $parts);
493			$this->assertTrue($parts->first()->isOfType('int'));
494			$this->assertTrue($parts->last()->isOfType('int'));
495			$this->assertSame([2, 3], unwrap($parts->first()));
496			$this->assertSame([4, 5], unwrap($parts->last()));
497			}
498
499			public function testTake()
500			{
501			$loaded = false;
502			$a = new Defer('int', (function() use (&$loaded) {
503			yield 2;
504			yield 3;
505			yield 4;
506			$loaded = true;
507			})());
508			$b = $a->take(2);
509
510			$this->assertFalse($loaded);
511			$this->assertSame([2, 3, 4], \iterator_to_array($a->iterator()));
512			$this->assertInstanceOf(Defer::class, $b);
513			$this->assertSame([2, 3], \iterator_to_array($b->iterator()));
514			$this->assertTrue($loaded);
515			}
516
517			public function testTakeEnd()
518			{
519			$a = new Defer('int', (function() {
520			yield 2;
521			yield 3;
522			yield 4;
523			})());
524			$b = $a->takeEnd(2);
525
526			$this->assertSame([2, 3, 4], \iterator_to_array($a->iterator()));
527			$this->assertInstanceOf(Implementation::class, $b);
528			$this->assertSame([3, 4], \iterator_to_array($b->iterator()));
529			}
530
531			public function testAppend()
532			{
533			$aLoaded = false;
534			$bLoaded = false;
535			$a = new Defer('int', (function() use (&$aLoaded) {
536			yield 1;
537			yield 2;
538			$aLoaded = true;
539			})());
540			$b = new Defer('int', (function() use (&$bLoaded) {
541			yield 3;
542			yield 4;
543			$bLoaded = true;
544			})());
545			$c = $a->append($b);
546
547			$this->assertFalse($aLoaded);
548			$this->assertFalse($bLoaded);
549			$this->assertSame([1, 2], \iterator_to_array($a->iterator()));
550			$this->assertSame([3, 4], \iterator_to_array($b->iterator()));
551			$this->assertInstanceOf(Defer::class, $c);
552			$this->assertSame([1, 2, 3, 4], \iterator_to_array($c->iterator()));
553			$this->assertTrue($aLoaded);
554			$this->assertTrue($bLoaded);
555			}
556
557			public function testIntersect()
558			{
559			$aLoaded = false;
560			$bLoaded = false;
561			$a = new Defer('int', (function() use (&$aLoaded) {
562			yield 1;
563			yield 2;
564			$aLoaded = true;
565			})());
566			$b = new Defer('int', (function() use (&$bLoaded) {
567			yield 2;
568			yield 3;
569			$bLoaded = true;
570			})());
571			$c = $a->intersect($b);
572
573			$this->assertFalse($aLoaded);
574			$this->assertFalse($bLoaded);
575			$this->assertSame([1, 2], \iterator_to_array($a->iterator()));
576			$this->assertSame([2, 3], \iterator_to_array($b->iterator()));
577			$this->assertInstanceOf(Defer::class, $c);
578			$this->assertSame([2], \iterator_to_array($c->iterator()));
579			$this->assertTrue($aLoaded);
580			$this->assertTrue($bLoaded);
581			}
582
583			public function testAdd()
584			{
585			$loaded = false;
586			$a = new Defer('int', (function() use (&$loaded) {
587			yield 1;
588			$loaded = true;
589			})());
590			$b = ($a)(2);
591
592			$this->assertFalse($loaded);
593			$this->assertSame([1], \iterator_to_array($a->iterator()));
594			$this->assertInstanceOf(Defer::class, $b);
595			$this->assertSame([1, 2], \iterator_to_array($b->iterator()));
596			$this->assertTrue($loaded);
597			}
598
599			public function testSort()
600			{
601			$a = new Defer('int', (function() {
602			yield 1;
603			yield 4;
604			yield 3;
605			yield 2;
606			})());
607			$b = $a->sort(fn($a, $b) => $a > $b);
608
609			$this->assertSame([1, 4, 3, 2], \iterator_to_array($a->iterator()));
610			$this->assertInstanceOf(Defer::class, $b);
611			$this->assertSame([1, 2, 3, 4], \iterator_to_array($b->iterator()));
612			}
613
614			public function testReduce()
615			{
616			$sequence = new Defer('int', (function() {
617			yield 1;
618			yield 2;
619			yield 3;
620			yield 4;
621			})());
622
623			$this->assertSame(10, $sequence->reduce(0, fn($sum, $i) => $sum + $i));
624			}
625
626			public function testClear()
627			{
628			$loaded = false;
629			$a = new Defer('int', (function() use (&$loaded) {
630			yield 1;
631			yield 2;
632			$loaded = true;
633			})());
634			$b = $a->clear();
635
636			$this->assertFalse($loaded);
637			$this->assertInstanceOf(Implementation::class, $b);
638			$this->assertSame([], \iterator_to_array($b->iterator()));
639			$this->assertFalse($loaded);
640			$this->assertSame([1, 2], \iterator_to_array($a->iterator()));
641			}
642
643			public function testReverse()
644			{
645			$loaded = false;
646			$a = new Defer('int', (function() use (&$loaded) {
647			yield 1;
648			yield 2;
649			yield 3;
650			yield 4;
651			$loaded = true;
652			})());
653			$b = $a->reverse();
654
655			$this->assertFalse($loaded);
656			$this->assertSame([1, 2, 3, 4], \iterator_to_array($a->iterator()));
657			$this->assertInstanceOf(Defer::class, $b);
658			$this->assertSame([4, 3, 2, 1], \iterator_to_array($b->iterator()));
659			$this->assertTrue($loaded);
660			}
661
662			public function testEmpty()
663			{
664			$aLoaded = false;
665			$bLoaded = false;
666			$a = new Defer('int', (function() use (&$aLoaded) {
667			yield 1;
668			$aLoaded = true;
669			})());
670			$b = new Defer('int', (function() use (&$bLoaded) {
671			if (false) {
672			yield 1;
673			}
674			$bLoaded = true;
675			})());
676
677			$this->assertFalse($aLoaded);
678			$this->assertFalse($bLoaded);
679			$this->assertTrue($b->empty());
680			$this->assertFalse($a->empty());
681			$this->assertFalse($aLoaded); // still false as we don't need to load the full iterator to know if it's empty
682			$this->assertTrue($bLoaded);
683			}
684
685			public function testToSequenceOf()
686			{
687			$loaded = false;
688			$sequence = new Defer('int', (function() use (&$loaded) {
689			yield 1;
690			yield 2;
691			yield 3;
692			$loaded = true;
693			})());
694			$sequence = $sequence->toSequenceOf('string\|int', function($i) {
695			yield (string) $i;
696			yield $i;
697			});
698
699			$this->assertFalse($loaded);
700			$this->assertInstanceOf(Sequence::class, $sequence);
701			$this->assertSame(
702			['1', 1, '2', 2, '3', 3],
703			unwrap($sequence),
704			);
705			$this->assertTrue($loaded);
706			}
707
708			public function testToSetOf()
709			{
710			$sequence = new Defer('int', (function() {
711			yield 1;
712			yield 2;
713			yield 3;
714			})());
715			$set = $sequence->toSetOf('string\|int', function($i) {
716			yield (string) $i;
717			yield $i;
718			});
719
720			$this->assertInstanceOf(Set::class, $set);
721			$this->assertSame(
722			['1', 1, '2', 2, '3', 3],
723			unwrap($set),
724			);
725			}
726
727			public function testToMapOf()
728			{
729			$sequence = new Defer('int', (function() {
730			yield 1;
731			yield 2;
732			yield 3;
733			})());
734			$map = $sequence->toMapOf('string', 'int', fn($i) => yield (string) $i => $i);
735
736			$this->assertInstanceOf(Map::class, $map);
737			$this->assertCount(3, $map);
738			$this->assertSame(1, $map->get('1'));
739			$this->assertSame(2, $map->get('2'));
740			$this->assertSame(3, $map->get('3'));
741			}
742			}
743

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DeferTest::testContains() A

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