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#214 in Testing
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Cucumber Trellis
Create a test "trellis" for Cucumber.
You can create a test suite for Cucumber, with each test implemented in a file, linked to a Gherkin feature file.
Each test implements a trait CucumberTest
and this test is registered in the "trellis".
Finally, all tests are executed in parallel, and the trellis waits for all tests to finish.
Installation
cargo add cucumber cucumber-trellis
Usage
First, allows Cucumber to print output instead of libtest
by adding these lines in your Cargo.toml
:
[[test]]
name = "cucumber"
harness = false
Then, put feature files in tests/features
directory,
and put the following code in tests/cucumber.rs
:
mod tests;
fn main() {
let mut trellis = cucumber_trellis::CucumberTrellis::new(None);
trellis.add_test::<tests::example::SimpleTest>();
trellis.run_tests();
}
After that , in tests/tests/example.rs
,
implements the trait cucumber_trellis::CucumberTest
, like this:
use cucumber_trellis::CucumberTest;
use cucumber::World;
#[derive(World, Debug)]
pub(in super::super) struct SimpleTest;
impl CucumberTest for SimpleTest {
const NAME: &'static str = "simple-test";
}
// Implement here, the steps according the file `tests/features/simple-test.feature`
// ...
Don't forget the file tests/tests/mod.rs
:
pub(super) mod example;
Finally, run the tests:
cargo test --test cucumber
Example
You have an example in the tests
directory.
Macro
You can use the macro cucumber_trellis::cucumber_test
to simplify the code.
The macro cucumber_test
will decorate your function that will add Cucumber tests.
That function will receive a mutable reference to a CucumberTrellis
object:
use cucumber_trellis::{CucumberTrellis, cucumber_test};
#[cucumber_test(features="tests/features", executor="futures::executor::block_on", use_tokio)]
fn my_tests(trellis: &mut CucumberTrellis) {
trellis.add_test::<tests::example::SimpleTest>();
}
Currently, the macro cucumber_test
can receive the following parameters:
features
: The path to the features directory, here for exampletests/features
.executor
: The path of a function to execute asyncs.use_tokio
: The generated functionmain
will use thetokio
runtime; Tokio should be added indev-dependencies
.
These parameters are optional, and the parameters use_tokio
and executor
are mutually exclusive,
as use_tokio
forces the use of the tokio
as executor.
So the example above won't compile, it's just to show the usage.
The default executor is futures::executor::block_on
,
therefore the dependency futures
must be added in Cargo.toml
if no executor is specified in parameters.
Dependencies
~10–21MB
~297K SLoC