30 lines
1 KiB
TypeScript
30 lines
1 KiB
TypeScript
/**
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* Unit testing TypeScript types.
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* with https://github.com/SamVerschueren/tsd
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*/
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import { expectType } from 'tsd';
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import { NodeType, VfmUrl } from '../src';
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import * as P from '../src/internal/core';
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describe('#NodeType', () => {
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test('returns node that has sprcified type', () => {
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const x = null as unknown as NodeType<'url'>;
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expectType<VfmUrl>(x);
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});
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});
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describe('parser internals', () => {
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test('seq', () => {
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const first = null as unknown as P.Parser<'first'>;
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const second = null as unknown as P.Parser<'second'>;
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const third = null as unknown as P.Parser<'third' | 'third-second'>;
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expectType<P.Parser<['first', 'second', 'third' | 'third-second']>>(P.seq(first, second, third));
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});
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test('alt', () => {
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const first = null as unknown as P.Parser<'first'>;
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const second = null as unknown as P.Parser<'second'>;
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const third = null as unknown as P.Parser<'third' | 'third-second'>;
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expectType<P.Parser<'first' | 'second' | 'third' | 'third-second'>>(P.alt([first, second, third]));
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});
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});
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