public void testEquals(){
    Check(true, "'A' == 'A'");
    Check(true, "B == b");
    Check(false, "A == b");
    checkThrows("'A' = 'A'");
}

public void testFloatAndInteger(){
    Check(true, "6999999 >= 6999987");
    Check(true, "699999.9 >= 699998.7");
    Check(true, "699999.9 >= 699998");

    Check(true, "6999999 <= 7999987");
    Check(true, "699999.9 <= 799998.7");
    Check(true, "699999.9 >= 799998");

    Check(true, "6999999 == 6999999");
    Check(true, "699999.9 == 6999999.9");

    checkThrows( "699999.9 == AA");
    checkThrows( "699999.9 !> A''A");
}

public void testNotEqual(){
    Check(false, "A != A");
    Check(false, "B != b");
    Check(true, "A != b");
}

public void testParenthesis(){
    Check(true, "(A == A)");
    Check(false, "((((((A!=A))))))");
    checkThrows("((A))");
}

public void testNegation(){
    Check(false, "!(A==A))");
    Check(true, "!!!(A!=A))");
}

public void testAnd(){
    Check(true, "A==A and B==b");
    Check(false, "A==A and B==''");
    Check(false, "A==B and C==D");
}

public void testOr(){
    Check(true, "A==A or B==b");
    Check(true, "A==A or B==''");
    Check(false, "A==B or C==D");
}

public void testPrecedence(){
    Check(true, "A==B and C==C or D==D");
    Check(false, "A==B and (C==C or D==D)");
}

public void testExtraJunk(){
    checkThrows("A == A == A");
}