public void Test2()
{
var grammar = Grammar.LoadFromFile(@"/home/pacman29/Рабочий стол/cc-lab1/TestCCLab2/testGrammars/useless2.json");
var expectedGrammar = Grammar.LoadFromFile(@"/home/pacman29/Рабочий стол/cc-lab1/TestCCLab2/testExpectedGrammars/useless2.json");
LanguageUtils.RemoveUselessSymbols(grammar);
_testOutputHelper.WriteLine("Useless test:");
_testOutputHelper.WriteLine(grammar.ToString());
Assert.Equal(expectedGrammar, grammar);
}