Separate tests for each lint

Author: Daniel Smith

tests/ui/await_holding_invalid.rs

@@ -0,0 +1,65 @@
+// edition:2018
+#![warn(clippy::await_holding_lock)]
+
+use std::sync::Mutex;
+
+async fn bad(x: &Mutex<u32>) -> u32 {
+    let guard = x.lock().unwrap();
+    baz().await
+}
+
+async fn good(x: &Mutex<u32>) -> u32 {
+    {
+        let guard = x.lock().unwrap();
+        let y = *guard + 1;
+    }
+    baz().await;
+    let guard = x.lock().unwrap();
+    47
+}
+
+async fn baz() -> u32 {
+    42
+}
+
+async fn also_bad(x: &Mutex<u32>) -> u32 {
+    let first = baz().await;
+
+    let guard = x.lock().unwrap();
+
+    let second = baz().await;
+
+    let third = baz().await;
+
+    first + second + third
+}
+
+async fn not_good(x: &Mutex<u32>) -> u32 {
+    let first = baz().await;
+
+    let second = {
+        let guard = x.lock().unwrap();
+        baz().await
+    };
+
+    let third = baz().await;
+
+    first + second + third
+}
+
+#[allow(clippy::manual_async_fn)]
+fn block_bad(x: &Mutex<u32>) -> impl std::future::Future<Output = u32> + '_ {
+    async move {
+        let guard = x.lock().unwrap();
+        baz().await
+    }
+}
+
+fn main() {
+    let m = Mutex::new(100);
+    good(&m);
+    bad(&m);
+    also_bad(&m);
+    not_good(&m);
+    block_bad(&m);
+}