public function testIsTriangularLower()
{
$matrix = new Matrix(3, 3, 2);
$matrix->setPoint(1, 1, 0);
$matrix->setPoint(1, 2, 0);
$matrix->setPoint(1, 3, 0);
$matrix->setPoint(2, 1, 0);
$matrix->setPoint(2, 2, 0);
$matrix->setPoint(2, 3, 0);
$matrix->setPoint(3, 1, 1);
$matrix->setPoint(3, 2, 0);
$matrix->setPoint(3, 3, 0);
$sut = new Properties($matrix, 2);
$this->assertTrue($sut->isTriangularLower());
$matrix = new Matrix(1, 3, 2);
$sut = new Properties($matrix, 2);
$this->assertFalse($sut->isTriangularLower());
$matrix = new Matrix(3, 3, 2);
$matrix->setPoint(1, 1, 0);
$matrix->setPoint(1, 2, 0);
$matrix->setPoint(1, 3, 1);
$matrix->setPoint(2, 1, 0);
$matrix->setPoint(2, 2, 0);
$matrix->setPoint(2, 3, 0);
$matrix->setPoint(3, 1, 1);
$matrix->setPoint(3, 2, 0);
$matrix->setPoint(3, 3, 0);
$sut = new Properties($matrix, 2);
$this->assertFalse($sut->isTriangularLower());
}
