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author | Minteck <contact@minteck.org> | 2021-12-21 16:52:28 +0100 |
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committer | Minteck <contact@minteck.org> | 2021-12-21 16:52:28 +0100 |
commit | 46e43f4bde4a35785b4997b81e86cd19f046b69b (patch) | |
tree | c53c2f826f777f9d6b2d249dab556feb72a6c3a6 /src/node_modules/chance/test/test.basic.js | |
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Diffstat (limited to 'src/node_modules/chance/test/test.basic.js')
-rw-r--r-- | src/node_modules/chance/test/test.basic.js | 560 |
1 files changed, 560 insertions, 0 deletions
diff --git a/src/node_modules/chance/test/test.basic.js b/src/node_modules/chance/test/test.basic.js new file mode 100644 index 0000000..c7f1069 --- /dev/null +++ b/src/node_modules/chance/test/test.basic.js @@ -0,0 +1,560 @@ +import test from 'ava' +import Chance from '../chance.js' +import _ from 'lodash' + +const chance = new Chance() + +const timeout = (seconds) => { + new Promise((resolve, reject) => { + setTimeout(() => resolve(), seconds) + }) +} + +test('bool() returns a random boolean', t => { + let bool = chance.bool() + t.is(typeof bool, 'boolean') +}) + +test('bool() is within the bounds of what we would call random', t => { + let trueCount = 0; + _.times(1000, () => { + if (chance.bool()) { + trueCount++ + } + }) + + // The probability of this test failing is approximately 4.09e-86. + // So, in theory, it could give a false negative, but the sun will + // probably die long before that happens. + + t.true((trueCount > 200) && (trueCount < 800)) +}) + +test('bool() takes and obeys likelihood', t => { + let trueCount = 0 + _.times(1000, () => { + if (chance.bool({ likelihood: 30 })) { + trueCount++ + } + }) + + // Expect it to average around 300 + t.true((trueCount > 200) && (trueCount < 400)) + + trueCount = 0 + _.times(1000, () => { + if (chance.bool({ likelihood: 99 })) { + trueCount++ + } + }) + + // Expect it to average at 990 + t.true(trueCount > 900) +}) + +test('bool() throws an error if likelihood < 0 or > 100', t => { + const fn1 = () => chance.bool({likelihood: -23}) + t.throws(fn1, RangeError) + const fn2 = () => chance.bool({likelihood: 7933}) + t.throws(fn2, RangeError) +}) + +test('Chance() null works', async t => { + t.plan(1) + + let chance1 = Chance(null) + // Wait 5 ms before creating chance2 else sometimes they happen on the same + // tick and end up with the same seed! + await timeout(5) + let chance2 = Chance(null) + t.not(chance1.random(), chance2.random()) +}) + +test('Chance() does return differing results if differing seeds provided', t => { + let chance1 = new Chance(12345) + let chance2 = new Chance(54321) + t.not(chance1.random(), chance2.random()) +}) + +test('Chance() does not return repeatable results if no seed provided', async t => { + t.plan(1000) + let chance1 = new Chance() + await timeout(5) + let chance2 = new Chance() + _.times(1000, () => { + t.not(chance1.random(), chance2.random()) + }) +}) + +test('Chance() returns repeatable results if seed provided on the Chance object', t => { + let seed = new Date().getTime() + let chance1 = new Chance(seed) + let chance2 = new Chance(seed) + + _.times(1000, () => { + t.is(chance1.random(), chance2.random()) + }) +}) + +test('Chance() returns repeatable results if a string is provided as a seed', t => { + let seed = "foo" + let chance1 = new Chance(seed) + let chance2 = new Chance(seed) + + _.times(1000, () => { + t.is(chance1.random(), chance2.random()) + }) +}) + +test('Chance() returns different results if two different strings are provided', t => { + let chance1 = new Chance("foo") + let chance2 = new Chance("baz") + + _.times(1000, () => { + t.not(chance1.random(), chance2.random()) + }) +}) + +test('Chance() returns different results if two different strings are provided redux', t => { + // Credit to @dan-tilley for noticing this flaw in the old seed + let chance1 = new Chance("abe") + let chance2 = new Chance("acc") + + _.times(1000, () => { + t.not(chance1.random(), chance2.random()) + }) +}) + +test('Chance() returns different results if multiple arguments are provided', t => { + let seed = new Date().getTime() + let chance1 = new Chance(seed, "foo") + let chance2 = new Chance(seed, "bar") + + _.times(1000, () => { + t.not(chance1.random(), chance2.random()) + }) +}) + +test('Chance() will take an arbitrary function for the seed and use it', t => { + let chance = new Chance(() => 123) + + _.times(1000, () => { + t.is(chance.random(), 123) + }) +}) + +test('character() returns a character', t => { + let char = chance.character() + t.is(typeof char, 'string') + t.is(char.length, 1) +}) + +test('character() pulls only from pool, when specified', t => { + _.times(1000, () => { + let char = chance.character({ pool: 'abcde' }) + t.true(/[abcde]/.test(char)) + }) +}) + +test('character() allows only alpha', t => { + _.times(1000, () => { + let char = chance.character({ alpha: true }) + t.true(/[a-zA-Z]/.test(char)) + }) +}) + +test('character() allows only alphanumeric', t => { + _.times(1000, () => { + let char = chance.character({ alpha: true, numeric: true }) + t.true(/[a-zA-Z0-9]/.test(char)) + }) +}) + +test('character() obeys upper case', t => { + _.times(1000, () => { + let char = chance.character({ alpha: true, casing: 'upper' }) + t.true(/[A-Z]/.test(char)) + }) +}) + +test('character() obeys lower case', t => { + _.times(1000, () => { + let char = chance.character({ alpha: true, casing: 'lower' }) + t.true(/[a-z]/.test(char)) + }) +}) + +test('floating() returns a random floating', t => { + t.is(typeof chance.floating(), 'number') +}) + +test('floating() can take both a max and min and obey them both', t => { + _.times(1000, () => { + let floating = chance.floating({ min: 90, max: 100 }) + t.true(floating > 89) + t.true(floating < 101) + }) +}) + +test('floating() will not take fixed + min that would be out of range', t => { + const fn = () => chance.floating({ fixed: 13, min: -9007199254740992 }) + t.throws(fn, "Chance: Min specified is out of range with fixed. Min should be, at least, -900.7199254740992") +}) + +test('floating() will not take fixed + max that would be out of range', t => { + const fn = () => chance.floating({ fixed: 13, max: 9007199254740992 }) + t.throws(fn, "Chance: Max specified is out of range with fixed. Max should be, at most, 900.7199254740992") +}) + +test('floating() obeys the fixed parameter, when present', t => { + _.times(1000, () => { + let floating = chance.floating({ fixed: 4 }) + let decimals = floating.toString().split('.')[1] ? floating.toString().split('.')[1] : '' + t.true(decimals.length < 5) + }) +}) + +test('floating() can take fixed and obey it', t => { + _.times(1000, () => { + let floating = chance.floating({ fixed: 3 }) + let parsed = parseFloat(floating.toFixed(3)) + t.is(floating, parsed) + }) +}) + +test('floating() will not take both fixed and precision', t => { + const fn = () => chance.floating({fixed: 2, precision: 8}) + t.throws(fn, 'Chance: Cannot specify both fixed and precision.') +}) + +test('get() works as expected', t => { + let data = chance.get('lastNames') + t.true(typeof data === 'object') +}) + +test('hex() works as expected', t => { + _.times(1000, () => { + t.true(/[0-9a-f]/.test(chance.hex())) + }) +}) + +test('hex() can take Upper and obey it', t => { + _.times(1000, () => { + t.true(/[0-9A-F]/.test(chance.hex({ casing: 'upper' }))) + }) +}) + +test('integer() returns a random integer', t => { + t.is(typeof chance.integer(), 'number') +}) + +test('integer() is sometimes negative, sometimes positive', t => { + let positiveCount = 0 + _.times(1000, () => { + if (chance.integer() > 0) { + positiveCount++ + } + }) + + // Note: In very extreme circumstances this test may fail as, by its + // nature it's random. But it's a low enough percentage that I'm + // willing to accept it. + t.true((positiveCount > 200) && (positiveCount < 800)) +}) + +test('integer() can take a zero min and obey it', t => { + _.times(1000, () => { + t.true(chance.integer({ min: 0 }) > 0) + }) +}) + +test('integer() can take a negative min and obey it', t => { + _.times(1000, () => { + t.true(chance.integer({ min: -25 }) > -26) + }) +}) + +test('integer() can take a negative min and max and obey both', t => { + _.times(1000, () => { + let integer = chance.integer({ min: -25, max: -1 }) + t.true((integer > -26) && integer < 0) + }) +}) + +test('integer() can take a min with absolute value less than max and return in range above', t => { + let count = 0 + _.times(1000, () => { + // With a range this large we'd expect most values to be + // greater than 1 if this works correctly. + if (Math.abs(chance.integer({ min: -1, max: 1000000 })) < 2) { + count++ + } + }) + t.true(count < 900) +}) + +test('integer() throws an error when min > max', t => { + const fn = () => chance.integer({ min: 1000, max: 500 }) + t.throws(fn, 'Chance: Min cannot be greater than Max.') +}) + +test('letter() returns a letter', t => { + _.times(1000, () => { + let letter = chance.letter() + t.is(typeof letter, 'string') + t.is(letter.length, 1) + t.true(letter.match(/[a-z]/) !== null) + }) +}) + +test('letter() can take upper case', t => { + _.times(1000, () => { + let letter = chance.letter({ casing: 'upper' }) + t.is(typeof letter, 'string') + t.is(letter.length, 1) + t.true(letter.match(/[A-Z]/) !== null) + }) +}) + +test('natural() returns a random natural', t => { + t.is(typeof chance.natural(), 'number') +}) + +test('natural() throws an error if min < 0', t => { + const fn = () => chance.natural({ min: -23 }) + t.throws(fn, 'Chance: Min cannot be less than zero.') +}) + +test('natural() is always positive or zero', t => { + let positiveCount = 0 + _.times(1000, () => { + if (chance.natural() >= 0) { + positiveCount++ + } + }) + t.is(positiveCount, 1000) +}) + +test('natural() can take just a min and obey it', t => { + _.times(1000, () => { + t.true(chance.natural({ min: 9007199254740991 }) > 9007199254740990) + }) +}) + +test('natural() can take just a max and obey it', t => { + _.times(1000, () => { + t.true(chance.natural({ max: 100 }) < 101) + }) +}) + +test('natural() can take both a max and min and obey them both', t => { + _.times(1000, () => { + let natural = chance.natural({ min: 90, max: 100 }) + t.true(natural > 89) + t.true(natural < 101) + }) +}) + +test('natural() works with both bounds 0', t => { + _.times(1000, () => { + t.is(chance.natural({ min: 0, max: 0 }), 0) + }) +}) + +test('natural() respects numerals', t => { + _.times(1000, () => { + let natural = chance.natural({ numerals: 2 }) + t.true(natural <= 99) + t.true(natural >= 10) + }) +}) + +test('natural() works with excluded numbers', t => { + _.times(1000, () => { + let natural = chance.natural({ min: 1, max: 5, exclude: [1, 3] }) + t.true(natural <= 5) + t.true(natural >= 1) + t.true(natural !== 1) + t.true(natural !== 3) + }) +}) + +test('natural() works within empty exclude option', t => { + _.times(1000, () => { + let natural = chance.natural({ min: 1, max: 5, exclude: [] }) + t.true(natural <= 5) + t.true(natural >= 1) + }) +}) + +test('natural() throws an error if exclude is not an array', t => { + const fn = () => chance.natural({ min: 1, max: 5, exclude: "foo" }) + t.throws(fn, 'Chance: exclude must be an array.') +}) + +test('natural() throws an error if exclude is not an array', t => { + const fn = () => chance.natural({ min: 1, max: 5, exclude: ["puppies", 1] }) + t.throws(fn, 'Chance: exclude must be numbers.') +}) + +test('natural() throws an error if min > max', t => { + const fn = () => chance.natural({ min: 1000, max: 500 }) + t.throws(fn, 'Chance: Min cannot be greater than Max.') +}) + +test('natural() throws an error if numerals is less than 1', t => { + const fn = () => chance.natural({ numerals: 0 }) + t.throws(fn, 'Chance: Numerals cannot be less than one.') +}) + +test('prime() returns a number', t => { + t.is(typeof chance.prime(), 'number') +}) + +test('prime() throws an error if min < 0', t => { + const fn = () => chance.prime({ min: -23 }) + t.throws(fn, 'Chance: Min cannot be less than zero.') +}) + +test('prime() throws an error if min > max', t => { + const fn = () => chance.prime({ min: 1000, max: 500 }) + t.throws(fn, 'Chance: Min cannot be greater than Max.') +}) + +test('prime() is always positive and odd (or 2)', t => { + let positiveCount = 0 + _.times(1000, () => { + const prime = chance.prime() + if (prime > 0 && (prime % 2 === 1 || prime === 2)) { + positiveCount++ + } + }) + t.is(positiveCount, 1000) +}) + +test('prime() can take just a min and obey it', t => { + _.times(1000, () => { + t.true(chance.prime({ min: 5000 }) >= 5000) + }) +}) + +test('prime() can take just a max and obey it', t => { + _.times(1000, () => { + t.true(chance.prime({ max: 20000 }) <= 20000) + }) +}) + +test('prime() can take both a max and min and obey them both', t => { + _.times(1000, () => { + const prime = chance.prime({ min: 90, max: 100 }) + t.true(prime >= 90) + t.true(prime <= 100) + }) +}) + +test('set() works as expected', t => { + let cData = { lastNames: ['customName', 'testLast'] } + chance.set(cData) + let data = chance.get('lastNames') + t.true(_.isArray(data)) + t.is(data.length, 2) +}) + +test('string() returns a string', t => { + t.is(typeof chance.string(), 'string') +}) + +test('string() obeys length, when specified', t => { + _.times(1000, () => { + let length = chance.natural({ min: 1, max: 25 }) + t.is(chance.string({ length: length }).length, length) + }) +}) + +test('string() throws error if length < 0', t => { + const fn = () => chance.string({ length: -23 }) + t.throws(fn, 'Chance: Length cannot be less than zero.') +}) + +test('string() returns only letters with alpha', t => { + _.times(1000, () => { + let str = chance.string({ alpha: true }) + t.true(/[a-zA-Z]+/.test(str)) + }) +}) + +test('string() obeys upper case', t => { + _.times(1000, () => { + let str = chance.string({ alpha: true, casing: 'upper' }) + t.true(/[A-Z]+/.test(str)) + }) +}) + +test('string() obeys lower case', t => { + _.times(1000, () => { + let str = chance.string({ alpha: true, casing: 'lower' }) + t.true(/[a-z]+/.test(str)) + }) +}) + +test('string() obeys symbol', t => { + _.times(1000, () => { + let str = chance.string({ symbols: true }) + t.true(/[\!\@\#\$\%\^\&\*\(\)\[\]]+/.test(str)) + }) +}) + +test('string() can take just a min and obey it', t => { + _.times(1000, () => { + t.true(chance.string({ min: 6 }).length >= 6) + }) +}) + +test('string() can take just a max and obey it', t => { + _.times(1000, () => { + t.true(chance.string({ max: 20 }).length <= 20) + }) +}) + +test('falsy() should return a falsy value', t => { + _.times(1000, () => { + const value = chance.falsy() + t.falsy(value) + }) +}) + +test('falsy() should return a falsy value using a pool data', t => { + _.times(1000, () => { + const value = chance.falsy({pool: [null, undefined]}) + t.falsy(value) + }) +}) + +test('template() returns alpha numeric substituted', t => { + _.times(1000, () => { + let str = chance.template('ID-{Aa}-{##}') + t.regex(str, /^ID-[A-Z][a-z]-[0-9][0-9]$/) + }) +}) + +test('template() rejects unknown tokens', t => { + t.throws(() => chance.template('{Aa-}'), 'Invalid replacement character: "-".') + t.throws(() => chance.template('{Aa{}'), 'Invalid replacement character: "{".') + t.throws(() => chance.template('{Aab}'), 'Invalid replacement character: "b".') +}) + +test('template() allows escape sequnce', t => { + t.is(chance.template('\\\\ID-\\{Aa\\}'), '\\ID-{Aa}') +}) + +test('template() rejects invalid escape sequnce', t => { + t.throws(() => chance.template('ID-\\Aa'), 'Invalid escape sequence: "\\A".') +}) + +test('template() cannot be undefined', t => { + t.throws(() => chance.template(), 'Template string is required') +}) + +test('template() cannot be empty', t => { + t.throws(() => chance.template(''), 'Template string is required') +}) |