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Daijiro Wachi
b3042c7b68
shuffleArrayWithSeed was introduced along with test order randomization but was never called: the feature picks a random pending subtest at dequeue time using createSeededGenerator directly. Remove the dead helper and its export, and add direct unit coverage for createSeededGenerator's deterministic contract. Signed-off-by: Daijiro Wachi <daijiro.wachi@gmail.com> PR-URL: https://github.com/nodejs/node/pull/63847 Reviewed-By: Chemi Atlow <chemi@atlow.co.il> Reviewed-By: Jacob Smith <jacob@frende.me> Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
34 lines
1.2 KiB
JavaScript
34 lines
1.2 KiB
JavaScript
// Flags: --expose-internals
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'use strict';
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require('../common');
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const assert = require('node:assert');
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const { createSeededGenerator, kMaxRandomSeed } = require('internal/test_runner/utils');
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function sequence(seed, length = 10) {
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const random = createSeededGenerator(seed);
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const values = [];
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for (let i = 0; i < length; i++) {
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values.push(random());
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}
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return values;
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}
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// The same seed must always produce the same sequence so that
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// --test-random-seed reproduces a randomized test order across runs.
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assert.deepStrictEqual(sequence(0), sequence(0));
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assert.deepStrictEqual(sequence(12345), sequence(12345));
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assert.deepStrictEqual(sequence(kMaxRandomSeed), sequence(kMaxRandomSeed));
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// Different seeds must produce different sequences.
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assert.notDeepStrictEqual(sequence(11111), sequence(22222));
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assert.notDeepStrictEqual(sequence(0), sequence(1));
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// Seeds are coerced to uint32, matching the range accepted by
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// --test-random-seed.
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assert.deepStrictEqual(sequence(1), sequence(1 + 2 ** 32));
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// All generated values must fall in [0, 1).
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for (const value of sequence(98765, 1000)) {
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assert.ok(value >= 0 && value < 1, `value ${value} out of range`);
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}
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