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Make random()
iterable
#24
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7127d81
Make `random()` iterable
Richienb 1afb181
Update
Richienb 726bc24
Fix tyoe tests
Richienb 0ac163b
Rollback tsd to latest version that still supports Node.js 12
Richienb 5deca87
Rolling back tsd didn't work, we stop testing on Node.js 12 altogether
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,9 @@ | ||
import chalk from 'chalk'; | ||
import inRange from 'in-range'; | ||
|
||
export default function assertInRange(t, value, {start = 0, end}) { | ||
t.true( | ||
inRange(value, {start, end}), | ||
`${start} ${start <= value ? '≤' : chalk.red('≰')} ${chalk.yellow(value)} ${value <= end ? '≤' : chalk.red('≰')} ${end}` | ||
); | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,13 +1,21 @@ | ||
export default function uniqueRandom(minimum, maximum) { | ||
let previousValue; | ||
|
||
return function random() { | ||
function random() { | ||
const number = Math.floor( | ||
(Math.random() * (maximum - minimum + 1)) + minimum | ||
); | ||
|
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previousValue = number === previousValue && minimum !== maximum ? random() : number; | ||
|
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return previousValue; | ||
} | ||
|
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random[Symbol.iterator] = function * () { | ||
while (true) { | ||
yield random(); | ||
} | ||
}; | ||
|
||
return random; | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,7 +1,11 @@ | ||
import {expectType} from 'tsd'; | ||
import {expectAssignable, expectType} from 'tsd'; | ||
import uniqueRandom from './index.js'; | ||
|
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const random = uniqueRandom(1, 10); | ||
|
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expectType<() => number>(random); | ||
expectAssignable<() => number>(random); | ||
expectType<number>(random()); | ||
|
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for (const number of random) { | ||
expectType<number>(number); | ||
} |
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avajs/ava#3314