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lastIndexOf.spec.js
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lastIndexOf.spec.js
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import { lastIndexOf as lastIndexOfRamda } from 'ramda'
import { compareCombinations } from './_internals/testUtils.js'
import { possibleIterables, possibleTargets } from './indexOf.spec.js'
import { lastIndexOf } from './lastIndexOf.js'
test('with NaN', () => {
expect(lastIndexOf(NaN, [ NaN ])).toBe(0)
})
test('will throw with bad input', () => {
expect(lastIndexOfRamda([], true)).toBe(-1)
expect(() => indexOf([], true)).toThrowErrorMatchingInlineSnapshot('"indexOf is not defined"')
})
test('without list of objects - no R.equals', () => {
expect(lastIndexOf(3, [ 1, 2, 3, 4 ])).toBe(2)
expect(lastIndexOf(10)([ 1, 2, 3, 4 ])).toBe(-1)
})
test('list of objects uses R.equals', () => {
const listOfObjects = [ { a : 1 }, { b : 2 }, { c : 3 } ]
expect(lastIndexOf({ c : 4 }, listOfObjects)).toBe(-1)
expect(lastIndexOf({ c : 3 }, listOfObjects)).toBe(2)
})
test('list of arrays uses R.equals', () => {
const listOfLists = [ [ 1 ], [ 2, 3 ], [ 2, 3, 4 ], [ 2, 3 ], [ 1 ], [] ]
expect(lastIndexOf([], listOfLists)).toBe(5)
expect(lastIndexOf([ 1 ], listOfLists)).toBe(4)
expect(lastIndexOf([ 2, 3, 4 ], listOfLists)).toBe(2)
expect(lastIndexOf([ 2, 3, 5 ], listOfLists)).toBe(-1)
})
test('with string as iterable', () => {
expect(() => lastIndexOf('a', 'abc')).toThrowErrorMatchingInlineSnapshot('"Cannot read property \'indexOf\' of abc"')
expect(lastIndexOfRamda('a', 'abc')).toBe(0)
})
describe('brute force', () => {
compareCombinations({
fn : lastIndexOf,
fnRamda : lastIndexOfRamda,
firstInput : possibleTargets,
secondInput : possibleIterables,
callback : errorsCounters => {
expect(errorsCounters).toMatchInlineSnapshot(`
{
"ERRORS_MESSAGE_MISMATCH": 0,
"ERRORS_TYPE_MISMATCH": 34,
"RESULTS_MISMATCH": 0,
"SHOULD_NOT_THROW": 51,
"SHOULD_THROW": 0,
"TOTAL_TESTS": 170,
}
`)
},
})
})