From 1cc016833569e2dbae3b0431b7c87d5e75ef5de6 Mon Sep 17 00:00:00 2001
From: Jeb Rosen <jeb@jebrosen.com>
Date: Tue, 12 May 2020 00:09:59 -0700
Subject: macros: disambiguate the built-in #[test] attribute in macro
 expansion (#2503)

`tokio::test` and related macros now use the absolute path
`::core::prelude::v1::test` to refer to the built-in `test` macro.

This absolute path was introduced in rust-lang/rust#62086.
---
 tokio-macros/src/entry.rs  |  6 +++---
 tokio/tests/macros_test.rs | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+), 3 deletions(-)
 create mode 100644 tokio/tests/macros_test.rs

diff --git a/tokio-macros/src/entry.rs b/tokio-macros/src/entry.rs
index 6a58b791..2681f50d 100644
--- a/tokio-macros/src/entry.rs
+++ b/tokio-macros/src/entry.rs
@@ -142,7 +142,7 @@ fn parse_knobs(
     let header = {
         if is_test {
             quote! {
-                #[test]
+                #[::core::prelude::v1::test]
             }
         } else {
             quote! {}
@@ -334,14 +334,14 @@ pub(crate) mod old {
 
         let result = match runtime {
             Runtime::Threaded => quote! {
-                #[test]
+                #[::core::prelude::v1::test]
                 #(#attrs)*
                 #vis fn #name() #ret {
                     tokio::runtime::Runtime::new().unwrap().block_on(async { #body })
                 }
             },
             Runtime::Basic | Runtime::Auto => quote! {
-                #[test]
+                #[::core::prelude::v1::test]
                 #(#attrs)*
                 #vis fn #name() #ret {
                     tokio::runtime::Builder::new()
diff --git a/tokio/tests/macros_test.rs b/tokio/tests/macros_test.rs
new file mode 100644
index 00000000..8e68b8a4
--- /dev/null
+++ b/tokio/tests/macros_test.rs
@@ -0,0 +1,19 @@
+use tokio::test;
+
+#[test]
+async fn test_macro_can_be_used_via_use() {
+    tokio::spawn(async {
+        assert_eq!(1 + 1, 2);
+    })
+    .await
+    .unwrap();
+}
+
+#[tokio::test]
+async fn test_macro_is_resilient_to_shadowing() {
+    tokio::spawn(async {
+        assert_eq!(1 + 1, 2);
+    })
+    .await
+    .unwrap();
+}
-- 
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