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tryCatch-spec.ts
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tryCatch-spec.ts
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import {tryCatch, delay} from 'rambda'
describe('R.tryCatch', () => {
it('synchronous', () => {
const fn = (x: any) => x.x === 1
const result = tryCatch(fn, false)(null)
result // $ExpectType boolean
})
it('synchronous + fallback is function', () => {
const fn = (x: any) => typeof x.x
const fallback = (x: any) => typeof x
const result = tryCatch<any, string>(fn, fallback)(null)
result // $ExpectType string
})
it('asynchronous', async() => {
const fn = async(input: any) => {
return typeof JSON.parse('{a:')
}
const result = await tryCatch<string>(fn, 'fallback')(100)
result // $ExpectType string
})
it('asynchronous + fallback is asynchronous', async() => {
const fn = async(input: any) => {
await delay(100)
return JSON.parse(`{a:${input}`)
}
const fallback = async(input: any) => {
await delay(100)
return 'foo'
}
const result = await tryCatch<string>(fn, fallback)(100)
result // $ExpectType string
})
})