23 lines
674 B
TypeScript
23 lines
674 B
TypeScript
import { add, decimal, formatDecimal, multiply, subtract } from './decimal';
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describe('decimal', () => {
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it('keeps signed nanos exact without floats', () => {
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expect(formatDecimal(decimal({ units: 0, nano: -500000000 }))).toBe('-0.5');
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expect(
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formatDecimal(
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add(decimal({ units: '9007199254740993' }), decimal({ nano: 1 })),
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),
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).toBe('9007199254740993.000000001');
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expect(
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formatDecimal(
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subtract(decimal({ units: 1 }), decimal({ nano: 500000000 })),
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),
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).toBe('0.5');
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expect(
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formatDecimal(
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multiply(decimal({ units: 2 }), decimal({ nano: 500000000 })),
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),
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).toBe('1');
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});
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});
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