public function testTree3()
{
$deriver = new DerivationVisitor('x');
$evaluator = new EvaluationVisitor(['x' => 2]);
$f = Tree::mult(3, Tree::pow('x', 2))->add(Tree::mult(2, 'x'))->add(3);
$this->assertEquals(19, $evaluator->visit($f));
$this->assertEquals(14, $evaluator->visit($deriver->visit($f)));
}
/**
* @return SimplifyVisitor
*/
public function testVisitor4()
{
$visitor = new TypeVisitor(VariableNode::class);
$this->assertFalse($visitor->visit(Tree::add(2, 3)));
$this->assertFalse($visitor->visit(Tree::pow(2, 3)));
$this->assertFalse($visitor->visit(Tree::mult(2, 3)));
$this->assertFalse($visitor->visit(Tree::init(3)));
$this->assertTrue($visitor->visit(Tree::init('x')));
}
public function testRender2()
{
$node = Tree::mult(Tree::add('x', 67), Tree::pow(Tree::mult('x', Tree::mult(4, 'x'), Tree::add(Tree::mult('x', 67), Tree::pow(Tree::mult('x', 24), 2))), 2));
$xml = XMLVisitor::init();
$str = $xml->visit($node);
echo $str;
$xml = new \DOMDocument();
$xml->loadXML($str);
$this->assertTrue($xml->schemaValidate(__DIR__ . '/../../../resources/tree-schema.xsd'));
}
public function testTreeRender()
{
$deriver = new DerivationVisitor('x');
$renderer = RenderStringVisitor::init();
$simplfier = SimplifyVisitor::init();
$f = Tree::add(Tree::mult(3, Tree::pow('x', 2)), Tree::mult(2, 'x'), 3);
$this->assertEquals("3 * x ^ 2 + 2 * x + 3", $renderer->visit($f));
$this->assertEquals("6 * x + 2", $renderer->visit($simplfier->visit($deriver->visit($f))));
$this->assertEquals("6", $renderer->visit($simplfier->visit($deriver->visit($deriver->visit($f)))));
}
/**
* @param $value
* @return PowerNode
*/
public function pow($value)
{
return Tree::pow($this, $value);
}
public function testGetVariables()
{
$f = Tree::add(Tree::mult(3, 'x'), Tree::mult(2, 'y'), Tree::mult(Tree::pow('z', 2), 'y'), 3);
}
