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Added unit tests
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@denissimon
denissimon committed Feb 1, 2016
1 parent ae0e705 commit e3ce9e7
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235 changes: 235 additions & 0 deletions tests/FormulaParserTest.php
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<?php

require_once '../FormulaParser.php';

use FormulaParser\FormulaParser;

class FormulaParserTest extends PHPUnit_Framework_TestCase
{
// 1 -------- Test NAN ---------------------------------------------------------------->

/**
* @dataProvider testGetResultNANData
*/
public function testGetResultNAN($input_string) {
$formula = new FormulaParser($input_string);
$result = $formula->getResult();

$this->assertEquals((string) $result[1], 'NAN');
}

public function testGetResultNANData() {
return [
['sqrt(log(0)) + 1'],
['sqrt(-1.0)'],
['sqrt(-INF)'],
['sin(INF)'],
['0/0 + 1'],
['5^500 - 5^500'],
['5^500 / 5^500'],
['0 * INF'],
['Inf / Inf'],
['Inf / -Inf'],
['Inf - Inf'],
['NaN']
];
}

// 2 -------- Test infinity ----------------------------------------------------------->

/**
* @dataProvider testGetResultINFData
*/
public function testGetResultINF($input_string, $expected_result) {
$formula = new FormulaParser($input_string);
$result = $formula->getResult();

$this->assertEquals($result[1], $expected_result);
}

public function testGetResultINFData() {
return [
['sqrt(5^500)', INF],
['10 + log(0)', -INF],
['-(5)^500+5', -INF],
['(-5)^500+5', INF],
['abs(-5^500)/pi', INF],
['-abs(-5^500+1)', -INF],
['log(0)', -INF],
['-log(0)', INF],
['INF + 1', INF],
['Inf * Inf', INF],
['Inf * -Inf', -INF]
];
}

// 3 -------- Test variables ---------------------------------------------------------->

/**
* @dataProvider testGetResultVariablesData
*/
public function testGetResultVariables($input_string, $expected_result, $variables = [], $precision_rounding = 4) {
$formula = new FormulaParser($input_string, $precision_rounding);
$formula->setVariables($variables);
$result = $formula->getResult();

$this->assertEquals($result[1], $expected_result);
}

public function testGetResultVariablesData() {
return [
['3*x^2 - 4*y + 3/y', 16.38, ['x' => -4, 'y' => 8], 2],
['5/-x', 2.5, ['x' => -2]],
['+-z', 10, ['z' => -10]],
['sqrt(x^y/pi)', 9.027, ['x' => -2, 'y' => 8]],
['abs(a-b^3)', 25, ['a' => 2, 'b' => 3]],
['x-tan(-4)^3', 1.4521, ['x' => -.1]],
['(y)^x', 16, ['x' => 4, 'y' => -2]]
];
}

// 4 -------- Test numbers in E notation ---------------------------------------------->

/**
* @dataProvider testGetResultEData
*/
public function testGetResultE($input_string, $expected_result, $variables = [], $precision_rounding = 5) {
$formula = new FormulaParser($input_string, $precision_rounding);
$formula->setVariables($variables);
$result = $formula->getResult();

$this->assertEquals($result[1], $expected_result);
}

public function testGetResultEData() {
return [
['1e3+e+5^30', 9.31323E+20],
['abs(-5^30)', 9.31323E+20],
['2^(sqrt(15)^3)', 3.07796E+17],
['(-1E3+1)^(1E+1)', 9.90045E+29],
['-2^3^4', -2.41785E+24],
['4^-0.8e+1/x', 3.81469727e-6, ['x' => 4], 8]
];
}

// 5 -------- Test operator combinations ---------------------------------------------->

/**
* @dataProvider testGetResultOperatorsData
*/
public function testGetResultOperators($input_string, $expected_result) {
$formula = new FormulaParser($input_string);
$result = $formula->getResult();

$this->assertEquals($result[1], $expected_result);
}

public function testGetResultOperatorsData() {
return [
['10/++--2', 5],
['-+8', -8],
['5^--2', 25],
['5^-+2', 0.04],
['--sin(90)', 0.894],
['--4*-+-8', 32],
['5.-++-.5', 5.5],
['5^+++2', 25],
['2^-+-5', 32]
];
}

// 6 -------- Test exponential expressions -------------------------------------------->

/**
* @dataProvider testGetResultExpData
*/
public function testGetResultExp($input_string, $expected_result) {
$formula = new FormulaParser($input_string);
$result = $formula->getResult();

$this->assertEquals($result[1], $expected_result);
}

public function testGetResultExpData() {
return [
['10*(3-5)^4/2', 80],
['3+4*2/(1-5)^8', 3.0001],
['5^-500', 0],
['1^(-5^500)', 1],
['(-2)^+4', 16],
['-2^(-4)', -0.0625],
['8e+1^2', 6400],
['exp((-3)^2)', 8103.0839],
['cos(-4)^8', 0.0333],
['sin(10^5)', 0.0357],
['sin(-90)^-5', -1.7511],
['pi^sin(e)', 1.6004]
];
}

// 7 -------- Test errors ------------------------------------------------------------>

/**
* @dataProvider testGetResultErrorData
*/
public function testGetResultError($input_string, $expected_result, $variables = []) {
$formula = new FormulaParser($input_string);
$formula->setVariables($variables);
$result = $formula->getResult();

$this->assertEquals($result[1], $expected_result);
}

public function testGetResultErrorData() {
return [
['5*/7', 'Syntax error'],
['^', 'Syntax error'],
['.', 'Syntax error'],
['()', 'Syntax error'],
[') (', 'Syntax error'],
['(1+1)5', 'Syntax error'],
['pi e', 'Syntax error'],
['1*E1', 'Syntax error'],
['1.(23)', 'Syntax error'],
['1.2.3', 'Syntax error'],
['.y', 'Syntax error', ['y' => '4']],
['y', 'Syntax error', []],
[' ', 'Empty string'],
['_', 'Invalid character'],
['X', 'Invalid character', ['x' => '4']],
['(x))', 'Mismatched parentheses'],
['x+y', 'Variable error', ['x' => '1', 'y' => '']]
];
}

// 8 -------- Test other cases -------------------------------------------------------->

/**
* @dataProvider testGetResultData
*/
public function testGetResult($input_string, $expected_result) {
$formula = new FormulaParser($input_string);
$result = $formula->getResult();

$this->assertEquals($result[1], $expected_result);
}

public function testGetResultData() {
return [
['5', 5],
['(10+5)', 15],
['-(-8)', 8],
['(0.1+0.7)*10', 8],
['4.4/4/-0.4', -2.75],
['8+(10*(3+5))/2', 48],
['-35+.5e+5', 49965],
['sqrt(9)', 3],
['sqrt(exp(pi))', 4.8105],
['sin(-5.28e+8)', 0.2939],
['5e+1^0.5+e', 9.7893],
['5E+1+e', 52.7183]
];
}
}

?>

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