import { asSafely, isString, isArray, isNumber } from './as-safely';

const str1: string = asSafely('1' as unknown, isString);
// => OK

const strOrUndefined: string | undefined = asSafely(undefined as unknown, [isString, isUndefined]);
// => OK

const numberArray: number[] = asSafely([1, 2] as unknown, isArray(isNumber));
// => OK

const str2: string = asSafely(1, isString);
// => detects a transpile error.

const str3: string = asSafely(1 as unknown, isString);
// => throws a runtime error.

const str4: string = asSafely<string>(1, isString);
// => forces to predict an object as string. This will throw a runtime error.

const strOrUndefined2: string | undefined = asSafely(1 as unknown, isString, () => undefined);
// => not throws a runtime error and returns undefined.

const strWithCustomError: string = asSafely(1 as unknown, isString, (obj) => {
    console.error(obj);
    throw new Error('custom error') 
});
// => throws a custom error.