import { asserts } from "https://deno.land/x/dtils@2.6.0/deps.ts";
const { assertThrows } = asserts;
Executes a function, expecting it to throw. If it does not, then it throws.
Examples
Example 1
Example 1
import { assertThrows } from "https://deno.land/std@0.224.0/assert/assert_throws.ts";
Deno.test("doesThrow", function (): void {
assertThrows((): void => {
throw new TypeError("hello world!");
});
});
// This test will not pass.
Deno.test("fails", function (): void {
assertThrows((): void => {
console.log("Hello world");
});
});
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.
Examples
Example 1
Example 1
import { assertThrows } from "https://deno.land/std@0.224.0/assert/assert_throws.ts";
Deno.test("doesThrow", function (): void {
assertThrows((): void => {
throw new TypeError("hello world!");
}, TypeError);
assertThrows(
(): void => {
throw new TypeError("hello world!");
},
TypeError,
"hello",
);
});
// This test will not pass.
Deno.test("fails", function (): void {
assertThrows((): void => {
console.log("Hello world");
});
});
Parameters
ErrorClass: new (...args: any[]) => E