<?php
/**
* This file is part of the MathExecutor package
*
* (c) Alexander Kiryukhin
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code
*/
namespace NXP\Tests;
use Exception;
use NXP\Exception\DivisionByZeroException;
use NXP\Exception\IncorrectExpressionException;
use NXP\Exception\IncorrectNumberOfFunctionParametersException;
use NXP\Exception\UnknownFunctionException;
use NXP\Exception\UnknownVariableException;
use NXP\MathExecutor;
use PHPUnit\Framework\TestCase;
class MathTest extends TestCase
{
/**
* @dataProvider providerExpressions
*/
public function testCalculating($expression)
{
$calculator = new MathExecutor();
/** @var float $phpResult */
eval('$phpResult = ' . $expression . ';');
try {
$result = $calculator->execute($expression);
} catch (Exception $e) {
$this->fail(sprintf("Exception: %s (%s:%d), expression was: %s", get_class($e), $e->getFile(), $e->getLine(), $expression));
}
$this->assertEquals($phpResult, $result, "Expression was: ${expression}");
}
/**
* Expressions data provider
*
* Most tests can go in here. The idea is that each expression will be evaluated by MathExecutor and by PHP with eval.
* The results should be the same. If they are not, then the test fails. No need to add extra test unless you are doing
* something more complete and not a simple mathmatical expression.
*/
public function providerExpressions()
{
return [
['-5'],
['-5+10'],
['4-5'],
['4 -5'],
['(4*2)-5'],
['(4*2) - 5'],
['4*-5'],
['4 * -5'],
['abs(1.5)'],
['acos(0.15)'],
['acosh(1.5)'],
['asin(0.15)'],
['atan(0.15)'],
['atan2(1.5, 3.5)'],
['atanh(0.15)'],
['bindec("10101")'],
['ceil(1.5)'],
['cos(1.5)'],
['cosh(1.5)'],
['decbin("15")'],
['dechex("15")'],
['decoct("15")'],
['deg2rad(1.5)'],
['exp(1.5)'],
['expm1(1.5)'],
['floor(1.5)'],
['fmod(1.5, 3.5)'],
['hexdec("abcdef")'],
['hypot(1.5, 3.5)'],
['intdiv(10, 2)'],
['log(1.5)'],
['log10(1.5)'],
['log1p(1.5)'],
['max(1.5, 3.5)'],
['min(1.5, 3.5)'],
['octdec("15")'],
['pi()'],
['pow(1.5, 3.5)'],
['rad2deg(1.5)'],
['round(1.5)'],
['sin(1.5)'],
['sinh(1.5)'],
['sqrt(1.5)'],
['tan(1.5)'],
['tanh(1.5)'],
['0.1 + 0.2'],
['1 + 2'],
['0.1 - 0.2'],
['1 - 2'],
['0.1 * 2'],
['1 * 2'],
['0.1 / 0.2'],
['1 / 2'],
['2 * 2 + 3 * 3'],
['2 * 2 / 3 * 3'],
['2 / 2 / 3 / 3'],
['2 / 2 * 3 / 3'],
['2 / 2 * 3 * 3'],
['1 + 0.6 - 3 * 2 / 50'],
['(5 + 3) * -1'],
['-2- 2*2'],
['2- 2*2'],
['2-(2*2)'],
['(2- 2)*2'],
['2 + 2*2'],
['2+ 2*2'],
['2+2*2'],
['(2+2)*2'],
['(2 + 2)*-2'],
['(2+-2)*2'],
['1 + 2 * 3 / (min(1, 5) + 2 + 1)'],
['1 + 2 * 3 / (min(1, 5) - 2 + 5)'],
['1 + 2 * 3 / (min(1, 5) * 2 + 1)'],
['1 + 2 * 3 / (min(1, 5) / 2 + 1)'],
['1 + 2 * 3 / (min(1, 5) / 2 * 1)'],
['1 + 2 * 3 / (min(1, 5) / 2 / 1)'],
['1 + 2 * 3 / (3 + min(1, 5) + 2 + 1)'],
['1 + 2 * 3 / (3 - min(1, 5) - 2 + 1)'],
['1 + 2 * 3 / (3 * min(1, 5) * 2 + 1)'],
['1 + 2 * 3 / (3 / min(1, 5) / 2 + 1)'],
['(1 + 2) * 3 / (3 / min(1, 5) / 2 + 1)'],
['sin(10) * cos(50) / min(10, 20/2)'],
['sin(10) * cos(50) / min(10, (20/2))'],
['sin(10) * cos(50) / min(10, (max(10,20)/2))'],
['100500 * 3.5E5'],
['100500 * 3.5E-5'],
['1 + "2" / 3'],
["1.5 + '2.5' / 4"],
['1.5 + "2.5" * ".5"'],
['-1 + -2'],
['-1+-2'],
['-1- -2'],
['-1/-2'],
['-1*-2'],
['(1+2+3+4-5)*7/100'],
['(-1+2+3+4- 5)*7/100'],
['(1+2+3+4- 5)*7/100'],
['( 1 + 2 + 3 + 4 - 5 ) * 7 / 100'],
['1 && 0'],
['1 && 0 && 1'],
['1 || 0'],
['1 && 0 || 1'],
['5 == 3'],
['5 == 5'],
['5 != 3'],
['5 != 5'],
['5 > 3'],
['3 > 5'],
['3 >= 5'],
['3 >= 3'],
['3 < 5'],
['5 < 3'],
['3 <= 5'],
['5 <= 5'],
['10 < 9 || 4 > (2+1)'],
['10 < 9 || 4 > (-2+1)'],
['10 < 9 || 4 > (2+1) && 5 == 5 || 4 != 6 || 3 >= 4 || 3 <= 7'],
['1 + 5 == 3 + 1'],
['1 + 5 == 5 + 1'],
['1 + 5 != 3 + 1'],
['1 + 5 != 5 + 1'],
['1 + 5 > 3 + 1'],
['1 + 3 > 5 + 1'],
['1 + 3 >= 5 + 1'],
['1 + 3 >= 3 + 1'],
['1 + 3 < 5 + 1'],
['1 + 5 < 3 + 1'],
['1 + 3 <= 5 + 1'],
['1 + 5 <= 5 + 1'],
['(-4)'],
['(-4 + 5)'],
['(3 * 1)'],
['(-3 * -1)'],
['1 + (-3 * -1)'],
['1 + ( -3 * 1)'],
['1 + (3 *-1)'],
['1 - 0'],
['1-0'],
];
}
public function testUnknownFunctionException()
{
$calculator = new MathExecutor();
$this->expectException(UnknownFunctionException::class);
$calculator->execute('1 * fred("wilma") + 3');
}
public function testIncorrectExpressionException()
{
$calculator = new MathExecutor();
$this->expectException(IncorrectExpressionException::class);
$calculator->execute('1 * + ');
}
public function testZeroDivision()
{
$calculator = new MathExecutor();
$calculator->setDivisionByZeroIsZero();
$this->assertEquals(0, $calculator->execute('10 / 0'));
}
public function testZeroDivisionException()
{
$calculator = new MathExecutor();
$this->expectException(DivisionByZeroException::class);
$calculator->execute('10 / 0');
$calculator->setVar('one', 1)->setVar('zero', 0);
$this->assertEquals(0.0, $calculator->execute('$one / $zero'));
}
public function testVariableIncorrectExpressionException()
{
$calculator = new MathExecutor();
$calculator->setVar('four', 4);
$this->assertEquals(4, $calculator->execute('$four'));
$this->expectException(IncorrectExpressionException::class);
$this->assertEquals(0.0, $calculator->execute('$'));
$this->assertEquals(0.0, $calculator->execute('$ + $four'));
}
public function testExponentiation()
{
$calculator = new MathExecutor();
$this->assertEquals(100, $calculator->execute('10 ^ 2'));
}
public function testFunctionParameterOrder()
{
$calculator = new MathExecutor();
$calculator->addFunction('concat', function ($arg1, $arg2) {
return $arg1 . $arg2;
});
$this->assertEquals('testing', $calculator->execute('concat("test","ing")'));
$this->assertEquals('testing', $calculator->execute("concat('test','ing')"));
}
public function testFunction()
{
$calculator = new MathExecutor();
$calculator->addFunction('round', function ($arg) {
return round($arg);
});
$this->assertEquals(round(100 / 30), $calculator->execute('round(100/30)'));
}
public function testFunctionIf()
{
$calculator = new MathExecutor();
$this->assertEquals(30, $calculator->execute(
'if(100 > 99, 30, 0)'
));
$this->assertEquals(0, $calculator->execute(
'if(100 < 99, 30, 0)'
));
$this->assertEquals(30, $calculator->execute(
'if(98 < 99 && sin(1) < 1, 30, 0)'
));
$this->assertEquals(40, $calculator->execute(
'if(98 < 99 && sin(1) < 1, max(30, 40), 0)'
));
$this->assertEquals(40, $calculator->execute(
'if(98 < 99 && sin(1) < 1, if(10 > 5, max(30, 40), 1), 0)'
));
$this->assertEquals(20, $calculator->execute(
'if(98 < 99 && sin(1) > 1, if(10 > 5, max(30, 40), 1), if(4 <= 4, 20, 21))'
));
$this->assertEquals(cos(2), $calculator->execute(
'if(98 < 99 && sin(1) >= 1, max(30, 40), cos(2))'
));
$this->assertEquals(cos(2), $calculator->execute(
'if(cos(2), cos(2), 0)'
));
$trx_amount = 100000;
$calculator->setVar('trx_amount', $trx_amount);
$this->assertEquals($trx_amount, $calculator->execute('$trx_amount'));
$this->assertEquals($trx_amount * 0.03, $calculator->execute(
'if($trx_amount < 40000, $trx_amount * 0.06, $trx_amount * 0.03)'
));
$this->assertEquals($trx_amount * 0.03, $calculator->execute(
'if($trx_amount < 40000, $trx_amount * 0.06, if($trx_amount < 60000, $trx_amount * 0.05, $trx_amount * 0.03))'
));
$trx_amount = 39000;
$calculator->setVar('trx_amount', $trx_amount);
$this->assertEquals($trx_amount * 0.06, $calculator->execute(
'if($trx_amount < 40000, $trx_amount * 0.06, if($trx_amount < 60000, $trx_amount * 0.05, $trx_amount * 0.03))'
));
$trx_amount = 59000;
$calculator->setVar('trx_amount', $trx_amount);
$this->assertEquals($trx_amount * 0.05, $calculator->execute(
'if($trx_amount < 40000, $trx_amount * 0.06, if($trx_amount < 60000, $trx_amount * 0.05, $trx_amount * 0.03))'
));
$this->expectException(IncorrectNumberOfFunctionParametersException::class);
$this->assertEquals(0.0, $calculator->execute(
'if($trx_amount < 40000, $trx_amount * 0.06)'
));
}
public function testVariables()
{
$calculator = new MathExecutor();
$this->assertEquals(3.14159265359, $calculator->execute('$pi'));
$this->assertEquals(2.71828182846, $calculator->execute('$e'));
$calculator->setVars([
'trx_amount' => 100000,
'ten' => 10,
'nine' => 9,
'eight' => 8,
'seven' => 7,
'six' => 6,
'five' => 5,
'four' => 4,
'three' => 3,
'two' => 2,
'one' => 1,
'zero' => 0,
]);
$this->assertEquals(100000, $calculator->execute('$trx_amount'));
$this->assertEquals(10 - 9, $calculator->execute('$ten - $nine'));
$this->assertEquals(9 - 10, $calculator->execute('$nine - $ten'));
$this->assertEquals(10 + 9, $calculator->execute('$ten + $nine'));
$this->assertEquals(10 * 9, $calculator->execute('$ten * $nine'));
$this->assertEquals(10 / 9, $calculator->execute('$ten / $nine'));
$this->assertEquals(10 / (9 / 5), $calculator->execute('$ten / ($nine / $five)'));
$this->expectException(UnknownVariableException::class);
$this->assertEquals(0.0, $calculator->execute('$unsetVariable'));
}
public function testEvaluateFunctionParameters()
{
$calculator = new MathExecutor();
$calculator->addFunction(
'round',
function ($value, $decimals) {
return round($value, $decimals);
}
);
$expression = 'round(100 * 1.111111, 2)';
$phpResult = 0;
eval('$phpResult = ' . $expression . ';');
$this->assertEquals($phpResult, $calculator->execute($expression));
$expression = 'round((100*0.04)+(((100*1.02)+0.5)*1.28),2)';
eval('$phpResult = ' . $expression . ';');
$this->assertEquals($phpResult, $calculator->execute($expression));
}
public function testFunctionsWithQuotes()
{
$calculator = new MathExecutor();
$calculator->addFunction('concat', function ($first, $second) {
return $first . $second;
});
$this->assertEquals('testing', $calculator->execute('concat("test", "ing")'));
$this->assertEquals('testing', $calculator->execute("concat('test', 'ing')"));
}
public function testQuotes()
{
$calculator = new MathExecutor();
$testString = "some, long. arg; with: different-separators!";
$calculator->addFunction(
'test',
function ($arg) use ($testString) {
$this->assertEquals($testString, $arg);
return 0;
}
);
$calculator->execute('test("' . $testString . '")'); // single quotes
$calculator->execute("test('" . $testString . "')"); // double quotes
}
public function testBeginWithBracketAndMinus()
{
$calculator = new MathExecutor();
$this->assertEquals(-4, $calculator->execute('(-4)'));
$this->assertEquals(1, $calculator->execute('(-4 + 5)'));
}
public function testMinusZero()
{
$calculator = new MathExecutor();
$this->assertEquals(1, $calculator->execute('1 - 0'));
$this->assertEquals(1, $calculator->execute('1-0'));
}
}
