LazyTest::testTakeEnd() - Code Metrics - Inspection of "fix not verifying the yielded value type when firs..." - Innmind/Immutable - Measure and Improve Code Quality continuously with Scrutinizer

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Push — develop ( ebf010...27e4a8 )

by Baptiste

created 2019-12-10 17:35 UTC

LazyTest::testTakeEnd() A

↳ Parent: LazyTest

Complexity

Conditions	1
Paths	1

Size

Total Lines	12
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
eloc	8
nc	1
nop	0
dl	0
loc	12
rs	10
c	0
b	0
f	0

<?php
declare(strict_types = 1);

namespace Tests\Innmind\Immutable\Sequence;

use Innmind\Immutable\{
    Sequence\Lazy,
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 LazyTest extends TestCase
{
    public function testInterface()
    {
        $this->assertInstanceOf(
            Implementation::class,
            new Lazy('mixed', fn() => yield),
        );
    }

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

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

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

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

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

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

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

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

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

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

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

        $sequence->get(0);
    }

    public function testDiff()
    {
        $aLoaded = false;
        $bLoaded = false;
        $a = new Lazy('int', function() use (&$aLoaded) {
            yield 1;
            yield 2;
            $aLoaded = true;
        });
        $b = new Lazy('int', function() use (&$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(Lazy::class, $c);
        $this->assertSame([1], \iterator_to_array($c->iterator()));
        $this->assertTrue($aLoaded);
        $this->assertTrue($bLoaded);
    }

    public function testDistinct()
    {
        $loaded = false;
        $a = new Lazy('int', function() use (&$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(Lazy::class, $b);
        $this->assertSame([1, 2], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testDrop()
    {
        $loaded = false;
        $a = new Lazy('int', function() use (&$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(Lazy::class, $b);
        $this->assertSame([3, 4], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testDropEnd()
    {
        $a = new Lazy('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 Lazy('int', function() {
            yield 1;
            yield 2;
        });
        $b = new Lazy('int', function() {
            yield 1;
            yield 2;
            yield 3;
        });

        $this->assertTrue($a->equals($a));
        $this->assertFalse($a->equals($b));
    }

    public function testFilter()
    {
        $loaded = false;
        $a = new Lazy('int', function() use (&$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(Lazy::class, $b);
        $this->assertSame([2, 4], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

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

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

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

        $sequence->first();
    }

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

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

        $sequence->last();
    }

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

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

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

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

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

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

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

        $sequence->indexOf(1);
    }

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

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

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

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

    public function testMap()
    {
        $loaded = false;
        $a = new Lazy('int', function() use (&$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(Lazy::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 Lazy('int', function() {
            yield 1;
            yield 2;
            yield 3;
        });

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

    public function testPad()
    {
        $loaded = false;
        $a = new Lazy('int', function() use (&$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(Lazy::class, $b);
        $this->assertInstanceOf(Lazy::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 Lazy('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;
        $a = new Lazy('int', function() use (&$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(Lazy::class, $b);
        $this->assertSame([3, 4], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testSplitAt()
    {
        $sequence = new Lazy('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;
        $a = new Lazy('int', function() use (&$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(Lazy::class, $b);
        $this->assertSame([2, 3], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testTakeEnd()
    {
        $a = new Lazy('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;
        $a = new Lazy('int', function() use (&$aLoaded) {
            yield 1;
            yield 2;
            $aLoaded = true;
        });
        $b = new Lazy('int', function() use (&$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(Lazy::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;
        $a = new Lazy('int', function() use (&$aLoaded) {
            yield 1;
            yield 2;
            $aLoaded = true;
        });
        $b = new Lazy('int', function() use (&$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(Lazy::class, $c);
        $this->assertSame([2], \iterator_to_array($c->iterator()));
        $this->assertTrue($aLoaded);
        $this->assertTrue($bLoaded);
    }

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

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

    public function testSort()
    {
        $a = new Lazy('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(Lazy::class, $b);
        $this->assertSame([1, 2, 3, 4], \iterator_to_array($b->iterator()));
    }

    public function testReduce()
    {
        $sequence = new Lazy('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;
        $a = new Lazy('int', function() use (&$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;
        $a = new Lazy('int', function() use (&$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(Lazy::class, $b);
        $this->assertSame([4, 3, 2, 1], \iterator_to_array($b->iterator()));
        $this->assertTrue($loaded);
    }

    public function testEmpty()
    {
        $aLoaded = false;
        $bLoaded = false;
        $a = new Lazy('int', function() use (&$aLoaded) {
            yield 1;
            $aLoaded = true;
        });
        $b = new Lazy('int', function() use (&$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;
        $sequence = new Lazy('int', function() use (&$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 Lazy('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 Lazy('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\Lazy,
			0 ignored issues – show Bug introduced 2019-12-08 17:26 UTC by Report Bug Copy Issue Report The type `Innmind\Immutable\Sequence\Lazy` 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 LazyTest extends TestCase
21			{
22			public function testInterface()
23			{
24			$this->assertInstanceOf(
25			Implementation::class,
26			new Lazy('mixed', fn() => yield),
27			);
28			}
29
30			public function testGeneratorNotLoadedAtInstanciation()
31			{
32			$loaded = false;
33			$sequence = new Lazy('int', function() use (&$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			$sequence = new Lazy('int', function() {
47			yield '1';
48			});
49			\iterator_to_array($sequence->iterator());
50			}
51
52			public function testType()
53			{
54			$this->assertSame('int', (new Lazy('int', fn() => yield))->type());
55			}
56
57			public function testSize()
58			{
59			$sequence = new Lazy('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 Lazy('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 Lazy('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 Lazy('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			$a = new Lazy('int', function() use (&$aLoaded) {
111			yield 1;
112			yield 2;
113			$aLoaded = true;
114			});
115			$b = new Lazy('int', function() use (&$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(Lazy::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			$a = new Lazy('int', function() use (&$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(Lazy::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			$a = new Lazy('int', function() use (&$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(Lazy::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 Lazy('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 Lazy('int', function() {
187			yield 1;
188			yield 2;
189			});
190			$b = new Lazy('int', function() {
191			yield 1;
192			yield 2;
193			yield 3;
194			});
195
196			$this->assertTrue($a->equals($a));
197			$this->assertFalse($a->equals($b));
198			}
199
200			public function testFilter()
201			{
202			$loaded = false;
203			$a = new Lazy('int', function() use (&$loaded) {
204			yield 1;
205			yield 2;
206			yield 3;
207			yield 4;
208			$loaded = true;
209			});
210			$b = $a->filter(fn($i) => $i % 2 === 0);
211
212			$this->assertFalse($loaded);
213			$this->assertSame([1, 2, 3, 4], \iterator_to_array($a->iterator()));
214			$this->assertInstanceOf(Lazy::class, $b);
215			$this->assertSame([2, 4], \iterator_to_array($b->iterator()));
216			$this->assertTrue($loaded);
217			}
218
219			public function testForeach()
220			{
221			$sequence = new Lazy('int', function() {
222			yield 1;
223			yield 2;
224			yield 3;
225			yield 4;
226			});
227			$calls = 0;
228			$sum = 0;
229
230			$this->assertNull($sequence->foreach(function($i) use (&$calls, &$sum) {
231			++$calls;
232			$sum += $i;
233			}));
234			$this->assertSame(4, $calls);
235			$this->assertSame(10, $sum);
236			}
237
238			public function testThrowWhenTryingToGroupEmptySequence()
239			{
240			$this->expectException(CannotGroupEmptyStructure::class);
241
242			$sequence = new Lazy('int', function() {
243			if (false) {
244			yield 1;
245			}
246			});
247
248			$sequence->groupBy(fn($i) => $i);
249			}
250
251			public function testGroupBy()
252			{
253			$sequence = new Lazy('int', function() {
254			yield 1;
255			yield 2;
256			yield 3;
257			yield 4;
258			});
259			$groups = $sequence->groupBy(fn($i) => $i % 2);
260
261			$this->assertSame([1, 2, 3, 4], \iterator_to_array($sequence->iterator()));
262			$this->assertInstanceOf(Map::class, $groups);
263			$this->assertTrue($groups->isOfType('int', Sequence::class));
264			$this->assertCount(2, $groups);
265			$this->assertTrue($groups->get(0)->isOfType('int'));
266			$this->assertTrue($groups->get(1)->isOfType('int'));
267			$this->assertSame([2, 4], unwrap($groups->get(0)));
268			$this->assertSame([1, 3], unwrap($groups->get(1)));
269			}
270
271			public function testThrowWhenTryingToAccessFirstElementOnEmptySequence()
272			{
273			$this->expectException(OutOfBoundException::class);
274
275			$sequence = new Lazy('int', function() {
276			if (false) {
277			yield 1;
278			}
279			});
280
281			$sequence->first();
282			}
283
284			public function testThrowWhenTryingToAccessLastElementOnEmptySequence()
285			{
286			$this->expectException(OutOfBoundException::class);
287
288			$sequence = new Lazy('int', function() {
289			if (false) {
290			yield 1;
291			}
292			});
293
294			$sequence->last();
295			}
296
297			public function testFirst()
298			{
299			$sequence = new Lazy('int', function() {
300			yield 2;
301			yield 3;
302			yield 4;
303			});
304
305			$this->assertSame(2, $sequence->first());
306			}
307
308			public function testLast()
309			{
310			$sequence = new Lazy('int', function() {
311			yield 1;
312			yield 2;
313			yield 3;
314			});
315
316			$this->assertSame(3, $sequence->last());
317			}
318
319			public function testContains()
320			{
321			$sequence = new Lazy('int', function() {
322			yield 1;
323			yield 2;
324			yield 3;
325			});
326
327			$this->assertTrue($sequence->contains(2));
328			$this->assertFalse($sequence->contains(4));
329			}
330
331			public function testIndexOf()
332			{
333			$sequence = new Lazy('int', function() {
334			yield 1;
335			yield 2;
336			yield 4;
337			});
338
339			$this->assertSame(1, $sequence->indexOf(2));
340			$this->assertSame(2, $sequence->indexOf(4));
341			}
342
343			public function testThrowWhenTryingToAccessIndexOfUnknownValue()
344			{
345			$this->expectException(ElementNotFound::class);
346
347			$sequence = new Lazy('int', function() {
348			if (false) {
349			yield 1;
350			}
351			});
352
353			$sequence->indexOf(1);
354			}
355
356			public function testIndices()
357			{
358			$loaded = false;
359			$a = new Lazy('string', function() use (&$loaded) {
360			yield '1';
361			yield '2';
362			$loaded = true;
363			});
364			$b = $a->indices();
365
366			$this->assertFalse($loaded);
367			$this->assertSame(['1', '2'], \iterator_to_array($a->iterator()));
368			$this->assertInstanceOf(Lazy::class, $b);
369			$this->assertSame('int', $b->type());
370			$this->assertSame([0, 1], \iterator_to_array($b->iterator()));
371			$this->assertTrue($loaded);
372			}
373
374			public function testIndicesOnEmptySequence()
375			{
376			$a = new Lazy('string', function() {
377			if (false) {
378			yield 1;
379			}
380			});
381			$b = $a->indices();
382
383			$this->assertSame([], \iterator_to_array($a->iterator()));
384			$this->assertInstanceOf(Lazy::class, $b);
385			$this->assertSame('int', $b->type());
386			$this->assertSame([], \iterator_to_array($b->iterator()));
387			}
388
389			public function testMap()
390			{
391			$loaded = false;
392			$a = new Lazy('int', function() use (&$loaded) {
393			yield 1;
394			yield 2;
395			yield 3;
396			$loaded = true;
397			});
398			$b = $a->map(fn($i) => $i * 2);
399
400			$this->assertFalse($loaded);
401			$this->assertSame([1, 2, 3], \iterator_to_array($a->iterator()));
402			$this->assertInstanceOf(Lazy::class, $b);
403			$this->assertSame([2, 4, 6], \iterator_to_array($b->iterator()));
404			$this->assertTrue($loaded);
405			}
406
407			public function testThrowWhenTryingToModifyTheTypeWhenMapping()
408			{
409			$this->expectException(\TypeError::class);
410			$this->expectExceptionMessage('Argument 1 must be of type int, string given');
411
412			$sequence = new Lazy('int', function() {
413			yield 1;
414			yield 2;
415			yield 3;
416			});
417
418			\iterator_to_array($sequence->map(fn($i) => (string) $i)->iterator());
419			}
420
421			public function testPad()
422			{
423			$loaded = false;
424			$a = new Lazy('int', function() use (&$loaded) {
425			yield 1;
426			yield 2;
427			$loaded = true;
428			});
429			$b = $a->pad(4, 0);
430			$c = $a->pad(1, 0);
431
432			$this->assertFalse($loaded);
433			$this->assertSame([1, 2], \iterator_to_array($a->iterator()));
434			$this->assertInstanceOf(Lazy::class, $b);
435			$this->assertInstanceOf(Lazy::class, $c);
436			$this->assertSame([1, 2, 0, 0], \iterator_to_array($b->iterator()));
437			$this->assertSame([1, 2], \iterator_to_array($c->iterator()));
438			$this->assertTrue($loaded);
439			}
440
441			public function testPartition()
442			{
443			$sequence = new Lazy('int', function() {
444			yield 1;
445			yield 2;
446			yield 3;
447			yield 4;
448			});
449			$partition = $sequence->partition(fn($i) => $i % 2 === 0);
450
451			$this->assertSame([1, 2, 3, 4], \iterator_to_array($sequence->iterator()));
452			$this->assertInstanceOf(Map::class, $partition);
453			$this->assertTrue($partition->isOfType('bool', Sequence::class));
454			$this->assertCount(2, $partition);
455			$this->assertTrue($partition->get(true)->isOfType('int'));
456			$this->assertTrue($partition->get(false)->isOfType('int'));
457			$this->assertSame([2, 4], unwrap($partition->get(true)));
458			$this->assertSame([1, 3], unwrap($partition->get(false)));
459			}
460
461			public function testSlice()
462			{
463			$loaded = false;
464			$a = new Lazy('int', function() use (&$loaded) {
465			yield 2;
466			yield 3;
467			yield 4;
468			yield 5;
469			$loaded = true;
470			});
471			$b = $a->slice(1, 3);
472
473			$this->assertFalse($loaded);
474			$this->assertSame([2, 3, 4, 5], \iterator_to_array($a->iterator()));
475			$this->assertInstanceOf(Lazy::class, $b);
476			$this->assertSame([3, 4], \iterator_to_array($b->iterator()));
477			$this->assertTrue($loaded);
478			}
479
480			public function testSplitAt()
481			{
482			$sequence = new Lazy('int', function() {
483			yield 2;
484			yield 3;
485			yield 4;
486			yield 5;
487			});
488			$parts = $sequence->splitAt(2);
489
490			$this->assertSame([2, 3, 4, 5], \iterator_to_array($sequence->iterator()));
491			$this->assertInstanceOf(Sequence::class, $parts);
492			$this->assertTrue($parts->isOfType(Sequence::class));
493			$this->assertCount(2, $parts);
494			$this->assertTrue($parts->first()->isOfType('int'));
495			$this->assertTrue($parts->last()->isOfType('int'));
496			$this->assertSame([2, 3], unwrap($parts->first()));
497			$this->assertSame([4, 5], unwrap($parts->last()));
498			}
499
500			public function testTake()
501			{
502			$loaded = false;
503			$a = new Lazy('int', function() use (&$loaded) {
504			yield 2;
505			yield 3;
506			yield 4;
507			$loaded = true;
508			});
509			$b = $a->take(2);
510
511			$this->assertFalse($loaded);
512			$this->assertSame([2, 3, 4], \iterator_to_array($a->iterator()));
513			$this->assertInstanceOf(Lazy::class, $b);
514			$this->assertSame([2, 3], \iterator_to_array($b->iterator()));
515			$this->assertTrue($loaded);
516			}
517
518			public function testTakeEnd()
519			{
520			$a = new Lazy('int', function() {
521			yield 2;
522			yield 3;
523			yield 4;
524			});
525			$b = $a->takeEnd(2);
526
527			$this->assertSame([2, 3, 4], \iterator_to_array($a->iterator()));
528			$this->assertInstanceOf(Implementation::class, $b);
529			$this->assertSame([3, 4], \iterator_to_array($b->iterator()));
530			}
531
532			public function testAppend()
533			{
534			$aLoaded = false;
535			$bLoaded = false;
536			$a = new Lazy('int', function() use (&$aLoaded) {
537			yield 1;
538			yield 2;
539			$aLoaded = true;
540			});
541			$b = new Lazy('int', function() use (&$bLoaded) {
542			yield 3;
543			yield 4;
544			$bLoaded = true;
545			});
546			$c = $a->append($b);
547
548			$this->assertFalse($aLoaded);
549			$this->assertFalse($bLoaded);
550			$this->assertSame([1, 2], \iterator_to_array($a->iterator()));
551			$this->assertSame([3, 4], \iterator_to_array($b->iterator()));
552			$this->assertInstanceOf(Lazy::class, $c);
553			$this->assertSame([1, 2, 3, 4], \iterator_to_array($c->iterator()));
554			$this->assertTrue($aLoaded);
555			$this->assertTrue($bLoaded);
556			}
557
558			public function testIntersect()
559			{
560			$aLoaded = false;
561			$bLoaded = false;
562			$a = new Lazy('int', function() use (&$aLoaded) {
563			yield 1;
564			yield 2;
565			$aLoaded = true;
566			});
567			$b = new Lazy('int', function() use (&$bLoaded) {
568			yield 2;
569			yield 3;
570			$bLoaded = true;
571			});
572			$c = $a->intersect($b);
573
574			$this->assertFalse($aLoaded);
575			$this->assertFalse($bLoaded);
576			$this->assertSame([1, 2], \iterator_to_array($a->iterator()));
577			$this->assertSame([2, 3], \iterator_to_array($b->iterator()));
578			$this->assertInstanceOf(Lazy::class, $c);
579			$this->assertSame([2], \iterator_to_array($c->iterator()));
580			$this->assertTrue($aLoaded);
581			$this->assertTrue($bLoaded);
582			}
583
584			public function testAdd()
585			{
586			$loaded = false;
587			$a = new Lazy('int', function() use (&$loaded) {
588			yield 1;
589			$loaded = true;
590			});
591			$b = ($a)(2);
592
593			$this->assertFalse($loaded);
594			$this->assertSame([1], \iterator_to_array($a->iterator()));
595			$this->assertInstanceOf(Lazy::class, $b);
596			$this->assertSame([1, 2], \iterator_to_array($b->iterator()));
597			$this->assertTrue($loaded);
598			}
599
600			public function testSort()
601			{
602			$a = new Lazy('int', function() {
603			yield 1;
604			yield 4;
605			yield 3;
606			yield 2;
607			});
608			$b = $a->sort(fn($a, $b) => $a > $b);
609
610			$this->assertSame([1, 4, 3, 2], \iterator_to_array($a->iterator()));
611			$this->assertInstanceOf(Lazy::class, $b);
612			$this->assertSame([1, 2, 3, 4], \iterator_to_array($b->iterator()));
613			}
614
615			public function testReduce()
616			{
617			$sequence = new Lazy('int', function() {
618			yield 1;
619			yield 2;
620			yield 3;
621			yield 4;
622			});
623
624			$this->assertSame(10, $sequence->reduce(0, fn($sum, $i) => $sum + $i));
625			}
626
627			public function testClear()
628			{
629			$loaded = false;
630			$a = new Lazy('int', function() use (&$loaded) {
631			yield 1;
632			yield 2;
633			$loaded = true;
634			});
635			$b = $a->clear();
636
637			$this->assertFalse($loaded);
638			$this->assertInstanceOf(Implementation::class, $b);
639			$this->assertSame([], \iterator_to_array($b->iterator()));
640			$this->assertFalse($loaded);
641			$this->assertSame([1, 2], \iterator_to_array($a->iterator()));
642			}
643
644			public function testReverse()
645			{
646			$loaded = false;
647			$a = new Lazy('int', function() use (&$loaded) {
648			yield 1;
649			yield 2;
650			yield 3;
651			yield 4;
652			$loaded = true;
653			});
654			$b = $a->reverse();
655
656			$this->assertFalse($loaded);
657			$this->assertSame([1, 2, 3, 4], \iterator_to_array($a->iterator()));
658			$this->assertInstanceOf(Lazy::class, $b);
659			$this->assertSame([4, 3, 2, 1], \iterator_to_array($b->iterator()));
660			$this->assertTrue($loaded);
661			}
662
663			public function testEmpty()
664			{
665			$aLoaded = false;
666			$bLoaded = false;
667			$a = new Lazy('int', function() use (&$aLoaded) {
668			yield 1;
669			$aLoaded = true;
670			});
671			$b = new Lazy('int', function() use (&$bLoaded) {
672			if (false) {
673			yield 1;
674			}
675			$bLoaded = true;
676			});
677
678			$this->assertFalse($aLoaded);
679			$this->assertFalse($bLoaded);
680			$this->assertTrue($b->empty());
681			$this->assertFalse($a->empty());
682			$this->assertFalse($aLoaded); // still false as we don't need to load the full iterator to know if it's empty
683			$this->assertTrue($bLoaded);
684			}
685
686			public function testToSequenceOf()
687			{
688			$loaded = false;
689			$sequence = new Lazy('int', function() use (&$loaded) {
690			yield 1;
691			yield 2;
692			yield 3;
693			$loaded = true;
694			});
695			$sequence = $sequence->toSequenceOf('string\|int', function($i) {
696			yield (string) $i;
697			yield $i;
698			});
699
700			$this->assertFalse($loaded);
701			$this->assertInstanceOf(Sequence::class, $sequence);
702			$this->assertSame(
703			['1', 1, '2', 2, '3', 3],
704			unwrap($sequence),
705			);
706			$this->assertTrue($loaded);
707			}
708
709			public function testToSetOf()
710			{
711			$sequence = new Lazy('int', function() {
712			yield 1;
713			yield 2;
714			yield 3;
715			});
716			$set = $sequence->toSetOf('string\|int', function($i) {
717			yield (string) $i;
718			yield $i;
719			});
720
721			$this->assertInstanceOf(Set::class, $set);
722			$this->assertSame(
723			['1', 1, '2', 2, '3', 3],
724			unwrap($set),
725			);
726			}
727
728			public function testToMapOf()
729			{
730			$sequence = new Lazy('int', function() {
731			yield 1;
732			yield 2;
733			yield 3;
734			});
735			$map = $sequence->toMapOf('string', 'int', fn($i) => yield (string) $i => $i);
736
737			$this->assertInstanceOf(Map::class, $map);
738			$this->assertCount(3, $map);
739			$this->assertSame(1, $map->get('1'));
740			$this->assertSame(2, $map->get('2'));
741			$this->assertSame(3, $map->get('3'));
742			}
743			}
744

Innmind / Immutable

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LazyTest::testTakeEnd() A

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