Auto merge of #53410 - djrenren:custom-test-frameworks, r=alexcrichton

Introduce Custom Test Frameworks

Introduces `#[test_case]` and `#[test_runner]` and re-implements `#[test]` and `#[bench]` in terms of them.

Details found here: https://blog.jrenner.net/rust/testing/2018/08/06/custom-test-framework-prop.html

1 files changed, 45 insertions, 0 deletions

diff --git a/src/test/ui/custom_test_frameworks/dynamic.rs b/src/test/ui/custom_test_frameworks/dynamic.rs
new file mode 100644
index 00000000000..f82571b948a
--- /dev/null
+++ b/src/test/ui/custom_test_frameworks/dynamic.rs
@@ -0,0 +1,45 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// run-pass
+// aux-build:dynamic_runner.rs
+// compile-flags:--test
+#![feature(custom_test_frameworks)]
+#![test_runner(dynamic_runner::runner)]
+
+extern crate dynamic_runner;
+
+pub struct AllFoo(&'static str);
+struct IsFoo(String);
+
+impl dynamic_runner::Testable for AllFoo {
+    fn name(&self) -> String {
+        String::from(self.0)
+    }
+
+    fn subtests(&self) -> Vec<Box<dyn dynamic_runner::Testable>> {
+        self.0.split(" ").map(|word|
+            Box::new(IsFoo(word.into())) as Box<dyn dynamic_runner::Testable>
+        ).collect()
+    }
+}
+
+impl dynamic_runner::Testable for IsFoo {
+    fn name(&self) -> String {
+        self.0.clone()
+    }
+
+    fn run(&self) -> bool {
+        self.0 == "foo"
+    }
+}
+
+#[test_case]
+const TEST_2: AllFoo = AllFoo("foo foo");