// run-pass // aux-build:example_runner.rs // compile-flags:--test #![feature(custom_test_frameworks)] #![test_runner(example_runner::runner)] extern crate example_runner; pub struct IsFoo(&'static str); impl example_runner::Testable for IsFoo { fn name(&self) -> String { self.0.to_string() } fn run(&self) -> Option { if self.0 != "foo" { return Some(format!("{} != foo", self.0)); } None } } #[test_case] const TEST_1: IsFoo = IsFoo("hello"); #[test_case] const TEST_2: IsFoo = IsFoo("foo");