4 releases (2 stable)
1.0.1 | Jun 10, 2020 |
---|---|
1.0.0-preview1 | May 23, 2020 |
1.0.0-preview.1 | May 24, 2020 |
#514 in Testing
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Used in 8 crates
(7 directly)
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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
# use std::any::Any;
use assert_panic::assert_panic;
let _: Box<dyn Any + Send + 'static> =
assert_panic!(panic!("at the Disco"));
assert_panic!(panic!("at the Disco"), &str);
assert_panic!(
{ assert_panic!({}); },
String,
starts with "assert_panic! argument did not panic:",
);
assert_panic!(
assert_panic!(panic!("at the Disco"), String),
String,
starts with "Expected a `String` panic but found one with TypeId { t: ",
);
assert_panic!(
assert_panic!(panic!("found"), &str, contains "expected"),
String,
"Expected a panic containing \"expected\" but found \"found\"",
);
assert_panic!(
assert_panic!(panic!("found"), &str, starts with "expected"),
String,
"Expected a panic starting with \"expected\" but found \"found\"",
);
assert_panic!(
assert_panic!(panic!(1_usize), usize, 2_usize),
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.