Interface.test.ts•1.8 kB
import { expect, test } from 'vitest'
import { genericParameter } from './GenericParameter'
import { interfaceDeclaration } from './Interface'
import { method } from './Method'
import { namedType } from './NamedType'
import { property } from './Property'
import { stringify } from './stringify'
const A = namedType('A')
test('empty', () => {
const obj = interfaceDeclaration('MyInterface')
expect(stringify(obj)).toMatchInlineSnapshot(`
"interface MyInterface {}
"
`)
})
test('with property', () => {
const obj = interfaceDeclaration('SomeInterface').add(property('foo', A))
expect(stringify(obj)).toMatchInlineSnapshot(`
"interface SomeInterface {
foo: A
}"
`)
})
test('with method', () => {
const obj = interfaceDeclaration('MyInterface').add(method('doThing'))
expect(stringify(obj)).toMatchInlineSnapshot(`
"interface MyInterface {
doThing(): void
}"
`)
})
test('with generic parameter', () => {
const obj = interfaceDeclaration('SomeInterface')
.addGenericParameter(genericParameter('T').extends(namedType('U')))
.add(property('foo', A))
expect(stringify(obj)).toMatchInlineSnapshot(`
"interface SomeInterface<T extends U> {
foo: A
}"
`)
})
test('extending the type', () => {
const obj = interfaceDeclaration('SomeInterface').extends(namedType('Foo')).add(property('foo', A))
expect(stringify(obj)).toMatchInlineSnapshot(`
"interface SomeInterface extends Foo {
foo: A
}"
`)
})
test('extending multiple types', () => {
const obj = interfaceDeclaration('SomeInterface')
.extends(namedType('Foo'))
.extends(namedType('Bar'))
.add(property('foo', A))
expect(stringify(obj)).toMatchInlineSnapshot(`
"interface SomeInterface extends Foo, Bar {
foo: A
}"
`)
})