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MhchemParserTest.php
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MhchemParserTest.php
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<?php
namespace MediaWiki\Extension\Math\WikiTexVC\Mhchem\Tests;
use MediaWiki\Extension\Math\WikiTexVC\Mhchem\MhchemParser;
use PHPUnit\Framework\TestCase;
/**
* Unit tests for the MhchemParser::toTex method.
*
* The toTex method converts chemical notations or physical unit strings into TeX output.
*
* @covers \MediaWiki\Extension\Math\WikiTexVC\Mhchem\MhchemParser
* @covers \MediaWiki\Extension\Math\WikiTexVC\Mhchem\MhchemTexify
*/
class MhchemParserTest extends TestCase {
/**
* Test the toTex method with a simple chemical equation.
*/
public function testToTexWithSimpleChemicalEquation() {
$parser = new MhchemParser();
$input = 'H2O';
$type = 'ce';
$result = $parser->toTex( $input, $type );
$this->assertIsString( $result );
$this->assertEquals( '{\mathrm{H}{\vphantom{A}}_{\smash[t]{2}}\mathrm{O}}', $result );
}
/**
* Test the toTex method with physical unit parsing.
*/
public function testToTexWithPhysicalUnit() {
$parser = new MhchemParser();
$input = 'm/s^2';
$type = 'pu';
$result = $parser->toTex( $input, $type );
$this->assertIsString( $result );
$this->assertEquals( '{\mathrm{m}/\mathrm{s^{2}}}', $result,
'The TeX output for physical units should match expected value' );
}
/**
* Test the toTex method with an empty input.
*/
public function testToTexWithEmptyInput() {
$parser = new MhchemParser();
$input = '';
$type = 'ce';
$result = $parser->toTex( $input, $type );
$this->assertIsString( $result, 'The output should be a string' );
$this->assertSame( '', $result, 'The output for empty input should be empty' );
}
/**
* Test the toTex method with optimization for TeX VC enabled.
*/
public function testToTexWithOptimizationForTexVC() {
$parser = new MhchemParser();
$input = 'C\bond{-~-}D';
$type = 'ce';
$optimizeMhchemForTexVC = true;
$result = $parser->toTex( $input, $type, $optimizeMhchemForTexVC );
$this->assertIsString( $result, 'The output should be a string' );
$this->assertEquals( '{\mathrm{C}{\rlap{\lower{.2em}{-}}\rlap{\raise{.2em}{-}}\tripledash}\mathrm{D}}',
$result, 'The TeX output should include extra curlies for optimization' );
}
}

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Aug 16 2026, 05:05 (12 w, 22 h ago)
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