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test(formatters): add Soroban token balance decimal precision formatter specs #596

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19 changes: 19 additions & 0 deletions src/utils/__tests__/wave8_currency_formatter.test.ts
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Original file line number Diff line number Diff line change
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describe('Wave 8 Rebalance: Soroban Token Balance Precision Formatter', () => {
const formatTokenBalance = (rawUnits: bigint, decimals: number = 7): string => {
const divisor = BigInt(10 ** decimals);
const whole = rawUnits / divisor;
const fraction = rawUnits % divisor;
const fractionStr = fraction.toString().padStart(decimals, '0').replace(/0+$/, '');
return fractionStr.length > 0 ? `${whole}.${fractionStr}` : `${whole}.0`;
};

it('should format 7-decimal Stellar Soroban token balance correctly', () => {
const raw = BigInt(10500000); // 1.05 tokens
expect(formatTokenBalance(raw, 7)).toBe('1.05');
});

it('should format whole number token balances with single trailing zero', () => {
const raw = BigInt(50000000); // 5 tokens
expect(formatTokenBalance(raw, 7)).toBe('5.0');
});
});
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