power-assert-rs

Build Status MIT licensed crates.io

Power Assert in Rust. Provides better assertion message like this:

`` $ cargo run --example normal Runningtarget/debug/examples/normal` thread '

' panicked at 'assertion failed: bar.val == bar.foo.val power_assert!(bar.val == bar.foo.val) | | | | | | | 3 | | | 2 | | | Foo { val: 2 } | | Bar { val: 3, foo: Foo { val: 2 } } | false Bar { val: 3, foo: Foo { val: 2 } } ', examples/normal.rs:26 An unknown error occurred

To learn more, run the command again with --verbose. ```

How to use

Add this to your Cargo.toml:

toml [dependencies] power-assert = "*"

and add this to your lib.rs or main.rs:

```rust

![feature(plugin)]

![plugin(power_assert)]

```

Now, you can use power_assert!() and power_assert_eq!().

If you want to override builtin assert!() and assert_eq!(), change your lib.rs or main.rs as follows.

```rust

![feature(plugin)]

![plugin(powerassert(overridebuiltins))]

```