yew/yew-router/examples/guide/chapters/05_testing.md

Testing

To make sure that your router works reliably, you will want to test your FromCaptures implementations, as well as the output of your route! macros.

FromCaptures

Testing implementors of is simple enough.

Just provide a &Matches (an alias of HashMap<'str, String>) to your prop's from_matches() method and test the expected results.

Example

#[test]
fn creates_props() {
    let mut captures: Captures = HashMap::new();
    captures.insert("key", "value");
    assert!(Props::from_matches(captures).is_some())
}

route!

Testing this is often less than ideal, since you often will want to keep the macro in-line with the Route so you have better readability. The best solution at the moment is to just copy + paste the route! macros as you see them into the tests.

Example

#[test]
fn matcher_rejects_unexpected_route() {
    let matcher = route!("/a/b");
    matcher.match_path("/a/b").expect("should match");
    matcher.match_path("/a/c").expect("should reject");
}