Marco Pasqualetti
238ca1c97f
Use `vitest` for backend tests: - `bench` script now uses [vitest's `bench`](https://vitest.dev/api/#bench) - e2e test fails with same error happening now with jest:`data-testid` attribute not present. vitest left, jest right <img width="1264" height="603" alt="image" src="https://github.com/user-attachments/assets/56fc43a6-e143-4208-bf14-7e016aae7fa9" />
42 lines
1.2 KiB
JavaScript
42 lines
1.2 KiB
JavaScript
// @ts-check
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/**
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* Creates an asymmetric matcher for approximate numeric equality.
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*
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* This helper is intended for use in test frameworks (e.g., Jest) where
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* values need to be compared within a configurable decimal precision
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* instead of strict equality.
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*
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* The comparison succeeds when:
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*
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* |actual - expected| < 10^(-precision)
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*
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* For example, with `precision = 3`, values must be within `0.001`.
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*
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* @param {number} expected The expected numeric value to compare against.
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*
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* @param {number} [precision=10]
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* The number of decimal places of tolerance. Higher values mean stricter
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* comparison. Internally converted to epsilon = 10^-precision.
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*
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* @returns {{
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* asymmetricMatch(actual: unknown): boolean,
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* toAsymmetricMatcher(): string
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* }} An object implementing Jest-style asymmetric matcher methods.
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*
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*/
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export function approxNumber(expected, precision = 10) {
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return {
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asymmetricMatch(actual) {
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if (typeof actual !== "number" || typeof expected !== "number") {
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return false;
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}
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const epsilon = Math.pow(10, -precision);
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return Math.abs(actual - expected) < epsilon;
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},
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toAsymmetricMatcher() {
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return `≈ ${expected} (precision ${precision})`;
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},
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};
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}
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