public function testParserWithStringConstants()
 {
     $context = new Context();
     $const = 'string constant';
     $context->def('const', $const, 'string');
     $actual = Parser::parse('const', $context);
     $this->assertEquals($const, $actual);
 }
 public function testNonNumericConstantDefinition()
 {
     $context = new Context();
     $context->def('const', 'string constant', 'string');
 }