Example:
A = (1, 2)
B = (a, b)
A×B = ((1, a), (1, b), (2, 1), (2, b))
|
public cartesianProduct ( |
||
| $B | ||
| Результат | ||
/**
* @dataProvider dataProviderForCartesianProduct
*/
public function testCartesianProduct(array $A, array $B, array $A×B, Set $R)
{
$setA = new Set($A);
$setB = new Set($B);
$setA×B = $setA->cartesianProduct($setB);
$A×B_array = $setA×B->asArray();
$this->assertEquals($R, $setA×B);
$this->assertEquals($A×B, $A×B_array);
$this->assertEquals(count($setA×B), count($A×B));
foreach ($setA×B as $key => $value) {
$this->assertInstanceOf('MathPHP\\SetTheory\\Set', $value);
$this->assertEquals(2, count($value));
}
foreach ($A×B_array as $key => $value) {
$this->assertInstanceOf('MathPHP\\SetTheory\\Set', $value);
$this->assertEquals(2, count($value));
}
}
