ExpressionTest.php

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<?php
 
use MediaWiki\Extensions\ParserFunctions\ExprParser;
 
class ExpressionTest extends MediaWikiUnitTestCase {
 
    public function testExpression( $input, $expected ) {
        $parser = new ExprParser();
        $this->assertEquals(
            $expected,
            $parser->doExpression( $input )
        );
    }
 
    public function provideExpressions() {
        return [
            [ '1 or 0', '1' ],
            [ 'not (1 and 0)', '1' ],
            [ 'not 0', '1' ],
            [ '4 < 5', '1' ],
            [ '-5 < 2', '1' ],
            [ '-2 <= -2', '1' ],
            [ '4 > 3', '1' ],
            [ '4 > -3', '1' ],
            [ '5 >= 2', '1' ],
            [ '2 >= 2', '1' ],
            [ '1 != 2', '1' ],
            [ '-4 * -4 = 4 * 4', '1' ],
            [ 'not (1 != 1)', '1' ],
            [ '1 + 1', '2' ],
            [ '-1 + 1', '0' ],
            [ '+1 + 1', '2' ],
            [ '4 * 4', '16' ],
            [ '(1/3) * 3', '1' ],
            [ '3 / 1.5', '2' ],
            [ '3 / 0.2', '15' ],
            [ '3 / ( 2.0 * 0.1 )', '15' ],
            [ '3 / ( 2.0 / 10 )', '15' ],
            [ '3 / (- 0.2 )', '-15' ],
            [ '3 / abs( 0.2 )', '15' ],
            [ '3 mod 2', '1' ],
            [ '1e4', '10000' ],
            [ '1e-2', '0.01' ],
            [ '4.0 round 0', '4' ],
            [ 'ceil 4', '4' ],
            [ 'floor 4', '4' ],
            [ '4.5 round 0', '5' ],
            [ '4.2 round 0', '4' ],
            [ '-4.2 round 0', '-4' ],
            [ '-4.5 round 0', '-5' ],
            [ '-2.0 round 0', '-2' ],
            [ 'ceil -3', '-3' ],
            [ 'floor -6.0', '-6' ],
            [ 'ceil 4.2', '5' ],
            [ 'ceil -4.5', '-4' ],
            [ 'floor -4.5', '-5' ],
            [ 'abs(-2)', '2' ],
            [ 'ln(exp(1))', '1' ],
            [ 'trunc(4.5)', '4' ],
            [ 'trunc(-4.5)', '-4' ],
            [ '123 fmod (2^64-1)', '123' ],
            [ '5.7 mod 1.3', '0' ],
            [ '5.7 fmod 1.3', '0.5' ],
            [ 'pi + 1', '4.1415926535898' ],
            [ 'sin(0)', '0' ],
            [ 'cos(0)', '1' ],
            [ 'tan(0)', '0' ],
            [ 'asin(0)', '0' ],
            [ 'acos(1)', '0' ],
            [ 'atan(0)', '0' ],
            [ 'sqrt(4)', '2' ],
        ];
    }
 
    public function testExpressionThrows( $input ) {
        $parser = new ExprParser();
        $parser->doExpression( $input );
    }
 
    public function provideExpressionThrows() {
        $longExpression = str_repeat( 'ln(', 1001 ) . '1' . str_repeat( ')', 1001 );
        return [
            'Expression too long' => [ $longExpression ],
            'Unexpected number' => [ '1 2' ],
            'Unrecognised word' => [ 'foo' ],
            'Unexpected number: pi' => [ '1 pi' ],
            'Unexpected operator' => [ '1 sin' ],
            'Unexpected operator: (' => [ '1 (' ],
            'Unexpected closing bracket' => [ '1 + 1)' ],
            'Unexpected punctuation' => [ '1, 2' ],
            'Unexpected binary operator' => [ '<1' ],
            'Unclosed bracket' => [ '(1' ],
            'Missing operand: unary -' => [ '-' ],
            'Missing operand: unary +' => [ '+' ],
            'Missing operand: *' => [ '1*' ],
            'Missing operand: /' => [ '1/' ],
            'Division by zero: /' => [ '1/0' ],
            'Missing operand: mod' => [ '1 mod' ],
            'Division by zero: mod' => [ '1 mod 0' ],
            'Missing operand: fmod' => [ '1 fmod' ],
            'Division by zero: fmod' => [ '1 fmod 0' ],
            'Missing operand: +' => [ '1+' ],
            'Missing operand: -' => [ '1-' ],
            'Missing operand: and' => [ '1 and' ],
            'Missing operand: or' => [ '1 or' ],
            'Missing operand: =' => [ '1 =' ],
            'Missing operand: not' => [ '1 not' ],
            'Missing operand: round' => [ '1 round' ],
            'Missing operand: <' => [ '1<' ],
            'Missing operand: >' => [ '1>' ],
            'Missing operand: <=' => [ '1<=' ],
            'Missing operand: >=' => [ '1>=' ],
            'Missing operand: <>' => [ '1<>' ],
            'Missing operand: sin' => [ 'sin()' ],
            'Missing operand: cos' => [ 'cos()' ],
            'Missing operand: tan' => [ 'tan()' ],
            'Missing operand: asin' => [ 'asin()' ],
            'Invalid operand: asin' => [ 'asin(3) ' ],
            'Missing operand: acos' => [ 'acos()' ],
            'Invalid operand: acos' => [ 'acos(-1.1)' ],
            'Missing operand: atan' => [ 'atan()' ],
            'Missing operand: exp' => [ 'exp()' ],
            'Missing operand: ln' => [ 'ln()' ],
            'Invalid operand: ln' => [ 'ln(-1)' ],
            'Missing operand: abs' => [ 'abs()' ],
            'Missing operand: floor' => [ 'floor' ],
            'Missing operand: trunc' => [ 'trunc' ],
            'Missing operand: ceil' => [ 'ceil' ],
            'Missing operand: ^' => [ '1 ^' ],
            // 'Invalid operand: ^' => [ '-1 ^ 5.5.5' ], // Not testable?
            'Missing operand: sqrt' => [ 'sqrt' ],
            'Result is not a number: sqrt' => [ 'sqrt(-1)' ],
        ];
    }
}