76 lines
1.9 KiB
PHP
76 lines
1.9 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Tez\Utils\Tests\Arr;
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use PHPUnit\Framework\TestCase;
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use Tez\Utils\Arr\Sliding;
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final class SlidingTest extends TestCase
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{
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public function testDefaultStepOfOne(): void
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{
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$result = Sliding::window([1, 2, 3, 4, 5], size: 3);
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self::assertSame([[1, 2, 3], [2, 3, 4], [3, 4, 5]], $result);
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}
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public function testCustomStep(): void
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{
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$result = Sliding::window([1, 2, 3, 4, 5], size: 3, step: 2);
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self::assertSame([[1, 2, 3], [3, 4, 5]], $result);
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}
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public function testStepEqualsSizeProducesNonOverlappingChunks(): void
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{
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$result = Sliding::window([1, 2, 3, 4, 5, 6], size: 2, step: 2);
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self::assertSame([[1, 2], [3, 4], [5, 6]], $result);
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}
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public function testArraySmallerThanWindowReturnsEmpty(): void
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{
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self::assertSame([], Sliding::window([1, 2], size: 5));
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}
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public function testExactFitProducesOneWindow(): void
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{
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$result = Sliding::window([1, 2, 3], size: 3);
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self::assertSame([[1, 2, 3]], $result);
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}
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public function testSizeOneReturnsEachElementWrapped(): void
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{
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$result = Sliding::window([1, 2, 3], size: 1);
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self::assertSame([[1], [2], [3]], $result);
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}
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public function testEmptyArrayReturnsEmpty(): void
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{
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self::assertSame([], Sliding::window([], size: 3));
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}
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public function testInvalidSizeThrows(): void
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{
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$this->expectException(\InvalidArgumentException::class);
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Sliding::window([1, 2, 3], size: 0);
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}
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public function testInvalidStepThrows(): void
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{
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$this->expectException(\InvalidArgumentException::class);
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Sliding::window([1, 2, 3], size: 2, step: 0);
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}
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public function testAssociativeKeysAreStripped(): void
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{
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$result = Sliding::window(['a' => 1, 'b' => 2, 'c' => 3], size: 2);
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self::assertSame([[1, 2], [2, 3]], $result);
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}
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}
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