import { assertThrows } from "https://deno.land/std@0.222.0/assert/mod.ts";
Executes a function, expecting it to throw. If it does not, then it throws.
To assert that an asynchronous function rejects, use
assertRejects.
Examples
Example 1
Example 1
import { assertThrows } from "https://deno.land/std@0.222.0/assert/assert_throws.ts";
assertThrows(() => { throw new TypeError("hello world!"); }); // Doesn't throw
assertThrows(() => console.log("hello world!")); // Throws
Executes a function, expecting it to throw. If it does not, then it throws. An error class and a string that should be included in the error message can also be asserted.
To assert that an asynchronous function rejects, use
assertRejects.
Examples
Example 1
Example 1
import { assertThrows } from "https://deno.land/std@0.222.0/assert/assert_throws.ts";
assertThrows(() => { throw new TypeError("hello world!"); }, TypeError); // Doesn't throw
assertThrows(() => { throw new TypeError("hello world!"); }, RangeError); // Throws
Parameters
ErrorClass: new (...args: any[]) => E