serial_test_derive 0.4.0

Helper crate for serial_test
Documentation 
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# serial_test
[![Version](https://img.shields.io/crates/v/serial_test.svg)](https://crates.io/crates/serial_test)
[![Downloads](https://img.shields.io/crates/d/serial_test)](https://crates.io/crates/serial_test)
[![Docs](https://docs.rs/serial_test/badge.svg)](https://docs.rs/serial_test/)
[![MIT license](https://img.shields.io/crates/l/serial_test.svg)](./LICENSE)
[![Build Status](https://travis-ci.com/palfrey/serial_test.svg?branch=master)](https://travis-ci.com/palfrey/serial_test)
[![MSRV: 1.36.0](https://flat.badgen.net/badge/MSRV/1.36.0/purple)](https://blog.rust-lang.org/2019/07/04/Rust-1.36.0.html)

`serial_test` allows for the creation of serialised Rust tests using the `serial` attribute
e.g.
```rust
#[test]
#[serial]
fn test_serial_one() {
  // Do things
}

#[test]
#[serial]
fn test_serial_another() {
  // Do things
}
```
Multiple tests with the `serial` attribute are guaranteed to be executed in serial. Ordering of the tests is not guaranteed however.

## Usage
We require at least Rust 1.36 for [attribute-like procedural macros](https://doc.rust-lang.org/reference/procedural-macros.html#attribute-macros) support (and [parking_lot using smallvec 1.0](https://github.com/Amanieu/parking_lot/pull/188))

Add to your Cargo.toml
```toml
[dev-dependencies]
serial_test = "*"
```

plus `use serial_test::serial;` (for Rust 2018) or
```rust
#[macro_use]
extern crate serial_test;
```
for earlier versions.

You can then either add `#[serial]` or `#[serial(some_text)]` to tests as required.