<?php
require_once __DIR__ . "/../../vendor/autoload.php";
use jlawrence\eos\Parser;
use jlawrence\eos\Trig;
class ParserTest extends PHPUnit_Framework_TestCase
{
public function testAddition()
{
$this->assertEquals(2, Parser::solve('1+1'));
}
public function testSubtraction()
{
$this->assertEquals(3, Parser::solve('9-6'));
}
public function testMultiplication()
{
$this->assertEquals(10, Parser::solve('5*2'));
}
public function testDivision()
{
$this->assertEquals(4, Parser::solve('12 / 3'));
}
public function testAdditionAndSubtraction()
{
$this->assertEquals(5, Parser::solve('3 + 4 - 2'));
}
public function testMultiplicationAndDivision()
{
$this->assertEquals(8, Parser::solve('16 * 2 / 4'));
}
public function testBIDMAS()
{
$this->assertEquals(14, Parser::solve('2 + 3 * 4'));
$this->assertEquals(12, Parser::solve('3 * (7 - 3)'));
$this->assertEquals(13, Parser::solve('2 + 3 * 5 - 4'));
$this->assertEquals(20, Parser::solve('5+((1+2)*4)+3'));
}
public function testVariables()
{
$this->assertEquals(10, Parser::solve('x*y', array(
'x' => 5,
'y' => 2
)));
$this->assertEquals(24, Parser::solve('2(4x)', array(
'x' => 3
)));
$this->assertEquals(15, Parser::solve('2a+a', array(
'a' => 5
)));
}
public function testTrigonometryInDegrees()
{
Trig::$DEGREES = true;
$this->assertEquals(0, Parser::solve('sin(180)'));
$this->assertEquals(0, Parser::solve('cos(90)'));
$this->assertEquals(1, Parser::solve('tan(45)'));
Trig::$DEGREES = false;
}
public function testTrigonometry()
{
$this->assertEquals(1, Parser::solve('sin(pi/2)'));
$this->assertEquals(-1, Parser::solve('cos(pi)'));
$this->assertEquals(1, Parser::solve('tan(pi/4)'));
$this->assertEquals(1, Parser::solve('csc(pi/2)'));
$this->assertEquals(-1, Parser::solve('sec(pi)'));
$this->assertEquals(1, Parser::solve('cot(pi/4)'));
}
public function testGamma()
{
$this->assertEquals(120, Parser::solve('5!'));
$this->assertEquals(720, Parser::solve('3!!'));
$result = Parser::solve('3.5!');
$this->assertTrue(11.64 > $result && $result > 11.63);
}
public function testLogSqrtPowersSummation()
{
$this->assertEquals(2, Parser::solve('ln(e^2)'));
$this->assertEquals(8, Parser::solve("log(sqrt(2^x),2)", 16));
$this->assertEquals(2, Parser::solve("log(100)"));
$this->assertEquals(9, Parser::solve('sum(sum(x, 1, 2)x, 1, 2)'));
$this->assertEquals(100, Parser::solve("sum(100, 2, 3)"));
}
public function testModulus()
{
$this->assertEquals(2, Parser::solve("5%3"));
$this->assertEquals(1, Parser::solve("4%3"));
}
public function testAbs()
{
$this->assertEquals(4, Parser::solve("abs(-4)"));
}
public function testSolvePostFix()
{
$pf = array('2', '3', '+');
$this->assertEquals(5, Parser::solve($pf));
}
/**
* @expectedException \Exception
* @expectedExceptionCode \jlawrence\eos\Math::E_DIV_ZERO
*/
public function testDivisionByZero()
{
Parser::solve("3/0");
}
/**
* @expectedException \Exception
* @expectedExceptionCode \jlawrence\eos\Math::E_DIV_ZERO
*/
public function testModulusByZero()
{
Parser::solve("3%0");
}
/**
* @expectedException \Exception
* @expectedExceptionCode \jlawrence\eos\Math::E_NAN
*/
public function testLnError()
{
Parser::solve("ln(0)");
}
/**
* @expectedException \Exception
* @expectedExceptionCode \jlawrence\eos\Math::E_NAN
*/
public function testLogError()
{
Parser::solve("log(0)");
}
/**
* @expectedException \Exception
* @expectedExceptionCode \jlawrence\eos\Math::E_NAN
*/
public function testSqrtError()
{
Parser::solve("sqrt(-4)");
}
/**
* @expectedException \Exception
* @expectedExceptionCode \jlawrence\eos\Math::E_NO_VAR
*/
public function testNoVariable()
{
Parser::solve("4x");
}
/**
* @expectedException \Exception
* @expectedExceptionCode \jlawrence\eos\Math::E_NAN
*/
public function testNegativeFactorial()
{
Parser::solve("-4!");
}
/**
* @expectedException \Exception
* @expectedExceptionCode \jlawrence\eos\Math::E_NO_EQ
*/
public function testNoEquation()
{
Parser::solve("");
}
/**
* @expectedException \Exception
* @expectedExceptionCode \jlawrence\eos\Math::E_NO_SET
*/
public function testMismatchedParenthesis()
{
Parser::solve("(2+(3*4)");
}
/**
* @expectedException \Exception
* @expectedExceptionCode \jlawrence\eos\Math::E_NO_SET
*/
public function testMismatchedBrackets()
{
Parser::solve("[2+[3*4]");
}
}
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