public char getLeftSymbol() {
        return leftSymbol;
    }
@Test
    public void testGetLeftSymbol() {
        char expectedLeftSymbol = '"';
        EscapeSymbol escapeSymbol = new EscapeSymbol(expectedLeftSymbol, '"');
        assertEquals(expectedLeftSymbol, escapeSymbol.getLeftSymbol(),
                "The left symbol should be '" + expectedLeftSymbol + "'");
    }