1 unstable release
0.1.0 | Jan 19, 2020 |
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#648 in Testing
31KB
347 lines
fakeenv
A simple wrapper of std::env
which allows faking the environment.
Example
Using the real environment
use fakeenv::EnvStore;
fn answer(env: &EnvStore) -> i32 {
env.var("THE_ANSWER").unwrap().parse().unwrap()
}
fn main() {
std::env::set_var("THE_ANSWER", "42");
let env = EnvStore::real();
assert_eq!(answer(&env), 42);
}
Making a fake environment
Fake is only turned on when the fake
feature is enabled.
As this is mostly for testing purpose, you might want to enable the feature like this:
[dependencies]
fakeenv = "0.1.0"
[dev-dependencies]
fakeenv = { version = "0.1.0", features = ["fake"] }
Then you can generate a fake environment using EnvStore::fake
:
use fakeenv::EnvStore;
fn answer(env: &EnvStore) -> i32 {
env.var("THE_ANSWER").unwrap().parse().unwrap()
}
fn main() {
let env = EnvStore::fake();
env.set_var("THE_ANSWER", "42");
assert_eq!(answer(&env), 42);
}
Faking user directories
The dirs
feature enables faking the dirs
functions.
[dependencies]
fakeenv = { version = "0.1.0", features = ["dirs"] }
let env = EnvStore::real();
println!("home directory = {:?}", env.home_dir());
Dependencies
~65–530KB