public function case_change_default_context()
{
$this->given($compiler = Compiler\Llk\Llk::load(new File\Read('hoa://Library/Math/Arithmetic.pp')), $visitor = new CUT(), $context = new \Mock\Hoa\Math\Context(), $variableName = 'a_variable', $variableValue = 42)->when($context->addVariable($variableName, function () use($variableValue) {
return $variableValue;
}))->then->object($visitor->setContext($context))->isNotIdenticalTo($context)->object($visitor->getContext())->isIdenticalTo($context)->float($visitor->visit($compiler->parse('abs(' . $variableName . ' - PI)')))->isEqualTo(abs($variableValue - M_PI))->mock($context)->call('getFunction')->withArguments('abs')->once->call('getVariable')->withArguments($variableName)->once->call('getConstant')->withArguments('PI')->once;
}