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Fixed intersection with inner exact of a empty interface #593

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Fixed intersection with inner exact of a empty interface #593

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d8ad096
Fixed issue about decoding an Intersection composed by a type and a t…
fabriziopapi May 20, 2021
b10c1ad
test for intersection with inner exact of a empty interface
fabriziopapi May 20, 2021
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2 changes: 1 addition & 1 deletion docs/modules/index.ts.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1827,7 +1827,7 @@ export const array = <C extends Mixed>(codec: C, name: string = `Array<${codec.n
name,
(u): u is Array<TypeOf<C>> => UnknownArray.is(u) && u.every(codec.is),
(u, c) =>
chain(UnknownArray.validate(u, c), us => ...
UnknownArray.validate(u, c).chain(us => ...
```

Added in v1.0.0
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21 changes: 8 additions & 13 deletions src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1168,19 +1168,14 @@ export interface IntersectionC<CS extends [Mixed, Mixed, ...Array<Mixed>]>
> {}

const mergeAll = (base: any, us: Array<any>): any => {
let r: any = base
for (let i = 0; i < us.length; i++) {
const u = us[i]
if (u !== base) {
// `u` contains a prismatic value or is the result of a stripping combinator
if (r === base) {
r = Object.assign({}, u)
continue
}
for (const k in u) {
if (u[k] !== base[k] || !r.hasOwnProperty(k)) {
r[k] = u[k]
}
if (!us.some(u => u !== base)) {
return base
}
const r: any = {}
for (const u of us) {
for (const k in u) {
if (!r.hasOwnProperty(k) || u[k] !== base[k]) {
r[k] = u[k]
}
}
}
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10 changes: 10 additions & 0 deletions test/exact.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,16 @@ describe('exact', () => {
assertSuccess(T.decode({ foo: 'foo' }))
})

it('should succeed validating a valid value (intersection with inner exact of a empty interface)', () => {
const T = t.intersection([
t.type({ foo: t.string }),
t.exact(t.intersection([t.interface({}), t.partial({ bar: t.number })]))
])
assertSuccess(T.decode({ foo: 'foo', bar: 1 }))
assertSuccess(T.decode({ foo: 'foo', bar: undefined }))
assertSuccess(T.decode({ foo: 'foo' }), { foo: 'foo' })
})

it('should succeed validating a valid value (refinement)', () => {
// tslint:disable-next-line: deprecation
const T = t.exact(t.refinement(t.type({ foo: t.string }), p => p.foo.length > 2))
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