Cargo Features

test-case has no features set by default.

[dependencies]
test-case = { version = "3.3.1", features = ["with-regex"] }
with-regex = regex

Enables with-regex of test-case-macros

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

regex with-regex?