| 1 | import { Tuple } from '@reduxjs/toolkit'
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| 2 |
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| 3 | describe('type tests', () => {
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| 4 | test('compatibility is checked between described types', () => {
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| 5 | const stringTuple = new Tuple('')
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| 6 |
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| 7 | expectTypeOf(stringTuple).toEqualTypeOf<Tuple<[string]>>()
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| 8 |
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| 9 | expectTypeOf(stringTuple).toMatchTypeOf<Tuple<string[]>>()
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| 10 |
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| 11 | expectTypeOf(stringTuple).not.toMatchTypeOf<Tuple<[string, string]>>()
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| 12 |
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| 13 | const numberTuple = new Tuple(0, 1)
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| 14 |
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| 15 | expectTypeOf(numberTuple).not.toMatchTypeOf<Tuple<string[]>>()
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| 16 | })
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| 17 |
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| 18 | test('concat is inferred properly', () => {
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| 19 | const singleString = new Tuple('')
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| 20 |
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| 21 | expectTypeOf(singleString).toEqualTypeOf<Tuple<[string]>>()
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| 22 |
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| 23 | expectTypeOf(singleString.concat('')).toEqualTypeOf<
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| 24 | Tuple<[string, string]>
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| 25 | >()
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| 26 |
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| 27 | expectTypeOf(singleString.concat([''] as const)).toMatchTypeOf<
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| 28 | Tuple<[string, string]>
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| 29 | >()
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| 30 | })
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| 31 |
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| 32 | test('prepend is inferred properly', () => {
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| 33 | const singleString = new Tuple('')
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| 34 |
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| 35 | expectTypeOf(singleString).toEqualTypeOf<Tuple<[string]>>()
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| 36 |
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| 37 | expectTypeOf(singleString.prepend('')).toEqualTypeOf<
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| 38 | Tuple<[string, string]>
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| 39 | >()
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| 40 |
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| 41 | expectTypeOf(singleString.prepend([''] as const)).toMatchTypeOf<
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| 42 | Tuple<[string, string]>
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| 43 | >()
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| 44 | })
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| 45 |
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| 46 | test('push must match existing items', () => {
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| 47 | const stringTuple = new Tuple('')
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| 48 |
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| 49 | expectTypeOf(stringTuple.push).toBeCallableWith('')
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| 50 |
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| 51 | expectTypeOf(stringTuple.push).parameter(0).not.toBeNumber()
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| 52 | })
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| 53 |
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| 54 | test('Tuples can be combined', () => {
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| 55 | const stringTuple = new Tuple('')
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| 56 |
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| 57 | const numberTuple = new Tuple(0, 1)
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| 58 |
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| 59 | expectTypeOf(stringTuple.concat(numberTuple)).toEqualTypeOf<
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| 60 | Tuple<[string, number, number]>
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| 61 | >()
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| 62 |
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| 63 | expectTypeOf(stringTuple.prepend(numberTuple)).toEqualTypeOf<
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| 64 | Tuple<[number, number, string]>
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| 65 | >()
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| 66 |
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| 67 | expectTypeOf(numberTuple.concat(stringTuple)).toEqualTypeOf<
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| 68 | Tuple<[number, number, string]>
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| 69 | >()
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| 70 |
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| 71 | expectTypeOf(numberTuple.prepend(stringTuple)).toEqualTypeOf<
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| 72 | Tuple<[string, number, number]>
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| 73 | >()
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| 74 |
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| 75 | expectTypeOf(stringTuple.prepend(numberTuple)).not.toMatchTypeOf<
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| 76 | Tuple<[string, number, number]>
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| 77 | >()
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| 78 |
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| 79 | expectTypeOf(stringTuple.concat(numberTuple)).not.toMatchTypeOf<
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| 80 | Tuple<[number, number, string]>
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| 81 | >()
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| 82 | })
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| 83 | })
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