use Test::More;

# same behavior for -ve numbers as +ve ones
is( fuzz(-721), -730 );
is( fuzz(-98), -98 );
is( fuzz(-2), -2 );

# fractions ignored
is( fuzz(-0.5), 0 );
is( fuzz(0.005), 0 );
is( fuzz(0.9), 0 );

# up to 2 digits returned as-is
is( fuzz(0), 0 );
is( fuzz(3), 3 );
is( fuzz(9), 9 );
is( fuzz(96), 96 );

# 3 digits
is( fuzz(120), 120 );
is( fuzz(123), 130 );
is( fuzz(721), 730 );
is( fuzz(809), 810 );
is( fuzz(980), 980 );
is( fuzz(993), 1000 );

# 4 digits
is( fuzz(1234), 1300 );
is( fuzz(1720), 1800 );
is( fuzz(3990), 4000 );
is( fuzz(9910), 10000 );

# 5 digits
is( fuzz(18433), 18500 );
is( fuzz(21250), 21300 );
is( fuzz(21750), 22000 );
is( fuzz(99800), 100000 );

# 6 digits follow 3-digit behavior
# 7 digits follow 4-digit behavior and so on
is( fuzz(123_555), 130_000 );
is( fuzz(219_900), 220_000 );
is( fuzz(633_999), 640_000 );
is( fuzz(1_234_567), 1_300_000 );
is( fuzz(99_402_888), 99_410_000 );
is( fuzz(99_611_222), 99_700_000 );
is( fuzz(99_704_567), 100_000_000 );

done_testing();