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migrate mini test

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This commit is contained in:
Felix Roos 2022-08-09 23:06:16 +02:00
parent 29009e14f4
commit 8b088ab6c2
1 changed files with 26 additions and 12 deletions
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38
packages/mini/test/mini.test.mjs
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@ -6,7 +6,7 @@ This program is free software: you can redistribute it and/or modify it under th
import { mini } from '../mini.mjs';
import '@strudel.cycles/core/euclid.mjs';
import { describe, it, expect } from 'vitest';
import { describe, expect, it } from 'vitest';
describe('mini', () => {
const minV = (v) => mini(v)._firstCycleValues;
@ -51,21 +51,31 @@ describe('mini', () => {
expect(minS('a(3, 8)')).toEqual(['a: 0 - 1/8', 'a: 3/8 - 1/2', 'a: 3/4 - 7/8']);
});
it('supports the ? operator', () => {
assert.deepStrictEqual(
mini('a?').queryArc(0, 20).map(hap => hap.whole.begin),
mini('a').degradeBy(0.5).queryArc(0, 20).map(hap => hap.whole.begin));
expect(
mini('a?')
.queryArc(0, 20)
.map((hap) => hap.whole.begin),
).toEqual(
mini('a')
.degradeBy(0.5)
.queryArc(0, 20)
.map((hap) => hap.whole.begin),
);
});
// testing things that involve pseudo-randomness, so there's a probability we could fail by chance.
// these next few tests work with the current PRNG, and are intended to succeed with p > 0.99 even if the PRNG changes
// (as long as the PRNG has a relatively-uniform distribution of values)
it('supports degradeBy with default of 50%', () => {
const haps = mini('a?').queryArc(0, 1000);
assert(459 <= haps.length && haps.length <= 541, 'Number of elements did not fall in 99% confidence interval for binomial with p=0.5');
expect(459 <= haps.length && haps.length <= 541).toBe(true);
// 'Number of elements did not fall in 99% confidence interval for binomial with p=0.5',
});
it('supports degradeBy with an argument', () => {
const haps = mini('a?0.8').queryArc(0, 1000);
assert(haps.length > 0, 'Should have had at least one element when degradeBy was set at 0.8');
assert(haps.length < 230, 'Had too many cycles remaining after degradeBy 0.8');
expect(haps.length > 0).toBe(true);
// 'Should have had at least one element when degradeBy was set at 0.8');
expect(haps.length < 230).toBe(true);
// 'Had too many cycles remaining after degradeBy 0.8');
});
it('supports the random choice operator ("|") with nesting', () => {
const numCycles = 900;
@ -78,16 +88,20 @@ describe('mini', () => {
return acc;
}, {});
const expected = {
a: numCycles / 3, b: numCycles / 6, c: numCycles / 6,
d: numCycles / 9, e: numCycles / 9, f: numCycles / 9
a: numCycles / 3,
b: numCycles / 6,
c: numCycles / 6,
d: numCycles / 9,
e: numCycles / 9,
f: numCycles / 9,
};
let chisq = -numCycles;
for (let k in expected) {
chisq += observed[k] * observed[k] / expected[k];
chisq += (observed[k] * observed[k]) / expected[k];
}
// 15.086 is the chisq for 5 degrees of freedom at 99%, so for 99% of uniformly-distributed
// PRNG, this test should succeed
assert(chisq <= 15.086,
chisq + ' was expected to be less than 15.086 under chi-squared test');
expect(chisq <= 15.086).toBe(true);
// assert(chisq <= 15.086, chisq + ' was expected to be less than 15.086 under chi-squared test');
});
});