Deprecated
This will be removed in 1.0.0. Import from https://deno.land/std/assert/assert_is_error.ts instead.
import { assertIsError } from "https://deno.land/std@0.224.0/testing/asserts.ts";
Make an assertion that error is an Error.
If not then an error will be thrown.
An error class and a string that should be included in the
error message can also be asserted.
Examples
Example 1
Example 1
import { assertIsError } from "https://deno.land/std@0.224.0/testing/asserts.ts";
assertIsError(null); // Throws
assertIsError(new RangeError("Out of range")); // Doesn't throw
assertIsError(new RangeError("Out of range"), SyntaxError); // Throws
assertIsError(new RangeError("Out of range"), SyntaxError, "Out of range"); // Doesn't throw
assertIsError(new RangeError("Out of range"), SyntaxError, "Within range"); // Throws
Parameters
optional
ErrorClass: new (...args: any[]) => E