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function.test.ts
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function.test.ts
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import * as z from '../index';
import { util } from '../helpers/util';
test('function inference 1', () => {
const args1 = z.tuple([z.string()]);
const returns1 = z.number();
const func1 = z.function(args1, returns1);
type func1 = z.TypeOf<typeof func1>;
const t1: util.AssertEqual<func1, (k: string) => number> = true;
[t1];
});
const args2 = z.tuple([
z.object({
f1: z.number(),
f2: z.string().nullable(),
f3: z.array(z.boolean().optional()).optional(),
}),
]);
const returns2 = z.union([z.string(), z.number()]);
const func2 = z.function(args2, returns2);
test('function inference 2', () => {
type func2 = z.TypeOf<typeof func2>;
const t2: util.AssertEqual<
func2,
(arg: { f1: number; f2: string | null; f3?: (boolean | undefined)[] | undefined }) => string | number
> = true;
[t2];
});
test('valid function run', () => {
const validFunc2Instance = func2.validate(_x => {
return 'adf' as any;
});
const checker = () => {
validFunc2Instance({
f1: 21,
f2: 'asdf',
f3: [true, false],
});
};
checker();
});
test('input validation error', () => {
const invalidFuncInstance = func2.validate(_x => {
return 'adf' as any;
});
const checker = () => {
invalidFuncInstance('Invalid_input' as any);
};
expect(checker).toThrow();
});
test('output validation error', () => {
const invalidFuncInstance = func2.validate(_x => {
return ['this', 'is', 'not', 'valid', 'output'] as any;
});
const checker = () => {
invalidFuncInstance({
f1: 21,
f2: 'asdf',
f3: [true, false],
});
};
expect(checker).toThrow();
});