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add tests for matrix class

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Arkadiusz Kondas 2016-04-30 23:21:32 +02:00
parent ff9adc267c
commit ee9bb7b252
1 changed files with 176 additions and 0 deletions
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tests/Phpml/Math/MatrixTest.php Normal file
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<?php
declare (strict_types = 1);
namespace tests\Phpml\Math;
use Phpml\Math\Matrix;
class MatrixTest extends \PHPUnit_Framework_TestCase
{
/**
* @expectedException \Phpml\Exception\InvalidArgumentException
*/
public function testThrowExceptionOnInvalidMatrixSupplied()
{
new Matrix([[1, 2], [3]]);
}
public function testCreateMatrixFromFlatArray()
{
$flatArray = [1, 2, 3, 4];
$matrix = Matrix::fromFlatArray($flatArray);
$this->assertInstanceOf(Matrix::class, $matrix);
$this->assertEquals([[1], [2], [3], [4]], $matrix->toArray());
$this->assertEquals(4, $matrix->getRows());
$this->assertEquals(1, $matrix->getColumns());
$this->assertEquals($flatArray, $matrix->getColumnValues(0));
}
/**
* @expectedException \Phpml\Exception\MatrixException
*/
public function testThrowExceptionOnInvalidColumnNumber()
{
$matrix = new Matrix([[1, 2, 3], [4, 5, 6]]);
$matrix->getColumnValues(4);
}
/**
* @expectedException \Phpml\Exception\MatrixException
*/
public function testThrowExceptionOnGetDeterminantIfArrayIsNotSquare()
{
$matrix = new Matrix([[1, 2, 3], [4, 5, 6]]);
$matrix->getDeterminant();
}
public function testGetMatrixDeterminant()
{
//http://matrix.reshish.com/determinant.php
$matrix = new Matrix([
[3, 3, 3],
[4, 2, 1],
[5, 6, 7],
]);
$this->assertEquals(-3, $matrix->getDeterminant());
$matrix = new Matrix([
[1, 2, 3, 3, 2, 1],
[1 / 2, 5, 6, 7, 1, 1],
[3 / 2, 7 / 2, 2, 0, 6, 8],
[1, 8, 10, 1, 2, 2],
[1 / 4, 4, 1, 0, 2, 3 / 7],
[1, 8, 7, 5, 4, 4 / 5],
]);
$this->assertEquals(1116.5035, $matrix->getDeterminant(), '', $delta = 0.0001);
}
public function testMatrixTranspose()
{
$matrix = new Matrix([
[3, 3, 3],
[4, 2, 1],
[5, 6, 7],
]);
$transposedMatrix = [
[3, 4, 5],
[3, 2, 6],
[3, 1, 7],
];
$this->assertEquals($transposedMatrix, $matrix->transpose()->toArray());
}
/**
* @expectedException \Phpml\Exception\InvalidArgumentException
*/
public function testThrowExceptionOnMultiplyWhenInconsistentMatrixSupplied()
{
$matrix1 = new Matrix([[1, 2, 3], [4, 5, 6]]);
$matrix2 = new Matrix([[3, 2, 1], [6, 5, 4]]);
$matrix1->multiply($matrix2);
}
public function testMatrixMultiplyByMatrix()
{
$matrix1 = new Matrix([
[1, 2, 3],
[4, 5, 6],
]);
$matrix2 = new Matrix([
[7, 8],
[9, 10],
[11, 12],
]);
$product = [
[58, 64],
[139, 154],
];
$this->assertEquals($product, $matrix1->multiply($matrix2)->toArray());
}
public function testDivideByScalar()
{
$matrix = new Matrix([
[4, 6, 8],
[2, 10, 20],
]);
$quotient = [
[2, 3, 4],
[1, 5, 10],
];
$this->assertEquals($quotient, $matrix->divideByScalar(2)->toArray());
}
/**
* @expectedException \Phpml\Exception\MatrixException
*/
public function testThrowExceptionWhenInverseIfArrayIsNotSquare()
{
$matrix = new Matrix([[1, 2, 3], [4, 5, 6]]);
$matrix->inverse();
}
public function testInverseMatrix()
{
//http://ncalculators.com/matrix/inverse-matrix.htm
$matrix = new Matrix([
[3, 4, 2],
[4, 5, 5],
[1, 1, 1],
]);
$inverseMatrix = [
[0, -1, 5],
[1 / 2, 1 / 2, -7 / 2],
[-1 / 2, 1 / 2, -1 / 2],
];
$this->assertEquals($inverseMatrix, $matrix->inverse()->toArray(), '', $delta = 0.0001);
}
public function testCrossOutMatrix()
{
$matrix = new Matrix([
[3, 4, 2],
[4, 5, 5],
[1, 1, 1],
]);
$crossOuted = [
[3, 2],
[1, 1],
];
$this->assertEquals($crossOuted, $matrix->crossOut(1, 1)->toArray());
}
}