Sham

/ʃam/
noun - a thing that is not what it is purported to be.
adjective - not genuine; fake or false.
verb - falsely present something as the truth.

Sham is a collection of useful mocks and fakes for testing Rust code. The primary purpose is to be able to swap out a genuine implementation and substitute it with a sham one, in order to achieve deterministic testing without side effects.

This is particularly useful for testing code that usually performs a particular operation that is either expensive, slow, or has side effects that are undesirable in a test environment, such as sending network requests. In these cases, a sham implementation can be used to simulate the real one, without actually performing the operation.

The modules provided are:

• reqwest
• std_process

Note, each module is behind a feature flag, in order to keep the crate size down for those who don't need all the functionality.

reqwest

The reqwest module provides mocks for the Reqwest crate, which is a popular HTTP client for Rust.

std_process

The std_process module provides mocks for the Rust standard library's process module, mainly and most notably Command.