assert-panic

This library provides a macro that asserts that a panic happens, and optionally what (kind of) panic happens.

The simplest version gives you the panic as boxed Any.

Example

```rust

use std::any::Any;

use assertpanic::assertpanic;

let : Box = assertpanic!(panic!("at the Disco"));

assert_panic!(panic!("at the Disco"), &str);

assertpanic!( { assertpanic!({}); }, String, starts with "assert_panic! argument did not panic:", );

assertpanic!( assertpanic!(panic!("at the Disco"), String), String, starts with "Expected a String panic but found one with TypeId { t: ", );

assertpanic!( assertpanic!(panic!("found"), &str, contains "expected"), String, "Expected a panic containing \"expected\" but found \"found\"", );

assertpanic!( assertpanic!(panic!("found"), &str, starts with "expected"), String, "Expected a panic starting with \"expected\" but found \"found\"", );

assertpanic!( assertpanic!(panic!(1usize), usize, 2usize), String, "Expected a panic equal to 2 but found 1", ); ```

Versioning

assert-panic strictly follows Semantic Versioning 2.0.0 with the following exceptions:

• The minor version will not reset to 0 on major version changes.
  Consider it the global feature level.
• The patch version will not reset to 0 on major or minor version changes.
  Consider it the global patch level.
• Panic messages originating from assert-panic are considered an implementation detail.
  Please only evaluate panic values you have direct control over.