What edge cases (negative, NaN, Infinity) are tested?

Based on the test file, here are the edge cases tested:

Invalid Input Handling [test.js:L1-L40]:

• Empty strings and string inputs throw errors
• Number.NaN throws a TypeError
• Boolean values (true) throw errors
• Number.POSITIVE_INFINITY and Number.NEGATIVE_INFINITY throw errors
• null throws errors

Negative Numbers [test.js:L59-L66]: The library supports negative numbers and formats them with a minus sign:

• prettyBytes(-0.4) → '-0.4 B'
• prettyBytes(-999) → '-999 B'
• prettyBytes(-1001) → '-1 kB'

The main function validates input in [index.js:L124-L126]:

if (typeof number !== 'bigint' && !Number.isFinite(number)) {
	throw new TypeError(`Expected a finite number, got ${typeof number}: ${number}`);
}

This check ensures that only finite numbers (or bigint) are accepted, explicitly rejecting NaN, Infinity, and -Infinity.

Fixed Width with Negatives [test.js:L328]: The library also tests negative numbers with fixedWidth enabled:

• prettyBytes(-1337, {fixedWidth: 8}) → '-1.34 kB'

Signed Zero [index.js:L145-L149]: There's special handling for zero with the signed option, which prepends a space instead of a plus sign for alignment purposes.

FOLLOW_UPS:

• How does the signed option handle positive vs negative values?
• What happens with very large numbers and bigint?
• Are there locale-specific edge cases tested?