src/shared/hyperliquid/decimalMath.test.ts - main - ikratkiy/Hyperliquid

src/shared/hyperliquid/decimalMath.test.ts

55 строк2 KB

ikratkiy

fix(spot): validate canonical IOC preconditions

14 июл 2026, 22:42

14 июл 2026, 22:42689be06

import { describe, expect, test } from "vitest";
import {
  addDecimals,
  compareDecimals,
  divideDecimals,
  formatPlainDecimal,
  formatRatio,
  multiplyDecimals,
  parsePlainDecimal,
  subtractDecimals,
} from "./decimalMath";

describe("exact decimal math", () => {
  test.each(["1e-3", "NaN", "Infinity", "+1", " 1", "1 ", ".1", "1.", "", "-"])(
    "rejects non-plain decimal %s",
    (value) => {
      expect(() => parsePlainDecimal(value)).toThrow("Invalid plain decimal");
    },
  );

  test.each([
    ["00012.34000", "12.34"],
    ["-000.0100", "-0.01"],
    ["0.00000000", "0"],
    ["1000000000000000000000000.000", "1000000000000000000000000"],
  ])("canonicalizes %s without exponent or trailing zeroes", (input, expected) => {
    expect(formatPlainDecimal(parsePlainDecimal(input))).toBe(expected);
  });

  test("compares, adds and subtracts different scales exactly", () => {
    const left = parsePlainDecimal("0.00030");
    const right = parsePlainDecimal("0.00001");

    expect(compareDecimals(left, parsePlainDecimal("0.0003"))).toBe(0);
    expect(formatPlainDecimal(subtractDecimals(left, right))).toBe("0.00029");
    expect(formatPlainDecimal(addDecimals(right, parsePlainDecimal("0.00029")))).toBe("0.0003");
  });

  test("multiplies large and small values without Number precision loss", () => {
    const product = multiplyDecimals(
      parsePlainDecimal("12345678901234567890.12345"),
      parsePlainDecimal("0.00001"),
    );

    expect(formatPlainDecimal(product)).toBe("123456789012345.6789012345");
  });

  test("retains a non-terminating quotient as an exact reduced ratio", () => {
    const ratio = divideDecimals(parsePlainDecimal("1"), parsePlainDecimal("3"));

    expect(ratio).toEqual({ numerator: 1n, denominator: 3n });
    expect(formatRatio(ratio, 8)).toBe("0.33333333");
    expect(formatRatio(ratio, 8, "ceil")).toBe("0.33333334");
  });
});