swc/node-swc/__tests__/minify/issue_8437_test.mjs

import swc from "../../..";

it("should output same result", async () => {
    const origin = `
function toFixed(value, maxDecimals, roundingFunction, optionals) {
    var splitValue = value.toString().split('.'),
        minDecimals = maxDecimals - (optionals || 0),
          
        optionalsRegExp,
        power,
        output;
    var boundedPrecisions;
    // var unused = 'xxxx';

    // Use the smallest precision value possible to avoid errors from floating point representation
    if (splitValue.length === 2) {
      boundedPrecisions = Math.min(Math.max(splitValue[1].length, minDecimals), maxDecimals);
    } else {
      boundedPrecisions = minDecimals;
    }

    power = Math.pow(10, boundedPrecisions);

    // Multiply up by precision, round accurately, then divide and use native toFixed():
    output = (roundingFunction(value + 'e+' + boundedPrecisions) / power).toFixed(boundedPrecisions);

    if (optionals > maxDecimals - boundedPrecisions) {
        optionalsRegExp = new RegExp('\\.?0{1,' + (optionals - (maxDecimals - boundedPrecisions)) + '}$');
        output = output.replace(optionalsRegExp, '');
    }

    return output;
}
toFixed(1.2345, 2, Math.round, 1);
    `

    async function minify() {
        const { code } = await swc.minify(origin, {
            compress: true,
            mangle: false
          });
        return code;
    }

    async function transform() {
        const { code } = await swc.transform(origin, {
          jsc: {
            minify: {
                compress: true,
                mangle: false
            },
          },
          isModule: false,
          minify: true
        });
        return code;
    }

    const [minifyResult, transformResult] = await Promise.all([minify(), transform()]);
    expect(minifyResult).toEqual(transformResult);
});