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fix: \commaNumber\ silently returns '0' for NaN and falsy values (#427)

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Replace truthiness guard with Number.isFinite() so NaN and Infinity are
explicitly rejected rather than silently masked. Zero is now handled by
toLocaleString, which returns '0' correctly. Add test cases for NaN and
Infinity.
This commit is contained in:
openhands 2026-03-06 05:51:50 +00:00
parent 67c0ed953a
commit 04fbca939f
2 changed files with 11 additions and 2 deletions
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3
kraiken-lib/src/format.ts
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@ -22,7 +22,8 @@ export function compactNumber(value: number): string {
/** Format number with commas (e.g. "1,234,567") */
export function commaNumber(value: number): string {
return value ? value.toLocaleString('en-US') : '0';
if (!Number.isFinite(value)) return '0';
return value.toLocaleString('en-US');
}
/** Format a token amount with comma grouping and 2 decimal places (e.g. "1,234.56") */

10
kraiken-lib/src/tests/format.test.ts
View file

@ -95,10 +95,18 @@ describe('compactNumber', () => {
});
describe('commaNumber', () => {
test('returns "0" for falsy input', () => {
test('returns "0" for zero', () => {
expect(commaNumber(0)).toBe('0');
});
test('returns "0" for NaN', () => {
expect(commaNumber(NaN)).toBe('0');
});
test('returns "0" for Infinity', () => {
expect(commaNumber(Infinity)).toBe('0');
});
test('formats thousands with commas', () => {
expect(commaNumber(1234)).toBe('1,234');
});