Feature-based conditional excludes test from cargo test inventory

[LukeTPeterson]

When I want to gate a whole test by a feature, I use conditional compilation, like this:

contents of some_test.rs

#![cfg(features = "some_feature")]

#[test]
fn some_test() {
    assert_eq!(1, 1);
}

However, this seems to remove the test from Cargo's test inventory, even when the feature is enabled.

When I run cargo test --features some_feature I can verify the feature is conditionally compiled, but the test is never run, nor even found.

     Running tests/some_test.rs (target/debug/deps/some_test-c832248c7dba795f)

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

This seems like something others would have encountered, but I haven't been able to turn up anyone describing precisely this issue.

Is this a known issue?

Thanks.

[H2CO3]

Shouldn't it be #![cfg(feature = "…")], singular?

[LukeTPeterson]

D'oh!!! Explains why nobody else is talking about it.