Stdlib/std.testing

std.testing

Types

struct Bench

Functions

assert_throws

pub fn assert_throws(f: |()|, err: Error | |(Error)|)

[src]

#[track_caller]
pub fn assert_throws(f: |() throws|, err: Error | AssertErrFn) {
    do {
        try f();
        assert false, "expected to throw an error";
    } catch(e) {
        switch (let t = err.(type)) {
            case Error:
                assert_eq e.error(), t.error();
            case AssertErrFn:
                t(e);
        }
    }
}

Assert the f closure will throw an error with the given error.

Assert the f closure will throw an error with the given error.

use std.testing.assert_throws;

assert_throws(|| {
    throw "error";
}, "error");

assert_throws(|| {
   throw "error";
}, |err| {
  assert err.error().contains("error");
});