chore: Fix clippy lints (#2931)

Closes: #2929

Co-authored-by: Bryan Donlan <bdonlan@amazon.com>

9 files changed, 20 insertions, 50 deletions

diff --git a/tokio-util/tests/time_delay_queue.rs b/tokio-util/tests/time_delay_queue.rs
index 73951e7c..42a56b8b 100644
--- a/tokio-util/tests/time_delay_queue.rs
+++ b/tokio-util/tests/time_delay_queue.rs
@@ -59,7 +59,7 @@ async fn multi_immediate_delays() {
     let entry = assert_ready!(poll!(queue));
     assert!(entry.is_none());
 
-    res.sort();
+    res.sort_unstable();
 
     assert_eq!("1", res[0]);
     assert_eq!("2", res[1]);
@@ -438,7 +438,7 @@ async fn insert_after_ready_poll() {
         queue.insert_at("foo", now + ms(500));
     }
 
-    res.sort();
+    res.sort_unstable();
 
     assert_eq!("1", res[0]);
     assert_eq!("2", res[1]);
diff --git a/tokio/src/runtime/enter.rs b/tokio/src/runtime/enter.rs
index bb6e6be0..f934162b 100644
--- a/tokio/src/runtime/enter.rs
+++ b/tokio/src/runtime/enter.rs
@@ -13,11 +13,7 @@ pub(crate) enum EnterContext {
 
 impl EnterContext {
     pub(crate) fn is_entered(self) -> bool {
-        if let EnterContext::Entered { .. } = self {
-            true
-        } else {
-            false
-        }
+        matches!(self, EnterContext::Entered { .. })
     }
 }
 
diff --git a/tokio/src/runtime/task/error.rs b/tokio/src/runtime/task/error.rs
index dfdec44c..509642d4 100644
--- a/tokio/src/runtime/task/error.rs
+++ b/tokio/src/runtime/task/error.rs
@@ -30,10 +30,7 @@ impl JoinError {
 
     /// Returns true if the error was caused by the task being cancelled
     pub fn is_cancelled(&self) -> bool {
-        match &self.repr {
-            Repr::Cancelled => true,
-            _ => false,
-        }
+        matches!(&self.repr, Repr::Cancelled)
     }
 
     /// Returns true if the error was caused by the task panicking
@@ -53,10 +50,7 @@ impl JoinError {
     /// }
     /// ```
     pub fn is_panic(&self) -> bool {
-        match &self.repr {
-            Repr::Panic(_) => true,
-            _ => false,
-        }
+        matches!(&self.repr, Repr::Panic(_))
     }
 
     /// Consumes the join error, returning the object with which the task panicked.
diff --git a/tokio/src/sync/batch_semaphore.rs b/tokio/src/sync/batch_semaphore.rs
index 148e8316..d09528be 100644
--- a/tokio/src/sync/batch_semaphore.rs
+++ b/tokio/src/sync/batch_semaphore.rs
@@ -527,20 +527,14 @@ impl TryAcquireError {
     /// Returns `true` if the error was caused by a closed semaphore.
     #[allow(dead_code)] // may be used later!
     pub(crate) fn is_closed(&self) -> bool {
-        match self {
-            TryAcquireError::Closed => true,
-            _ => false,
-        }
+        matches!(self, TryAcquireError::Closed)
     }
 
     /// Returns `true` if the error was caused by calling `try_acquire` on a
     /// semaphore with no available permits.
     #[allow(dead_code)] // may be used later!
     pub(crate) fn is_no_permits(&self) -> bool {
-        match self {
-            TryAcquireError::NoPermits => true,
-            _ => false,
-        }
+        matches!(self, TryAcquireError::NoPermits)
     }
 }
 
diff --git a/tokio/src/time/error.rs b/tokio/src/time/error.rs
index 2f93d671..a022f78f 100644
--- a/tokio/src/time/error.rs
+++ b/tokio/src/time/error.rs
@@ -40,10 +40,7 @@ impl Error {
 
     /// Returns `true` if the error was caused by the timer being shutdown.
     pub fn is_shutdown(&self) -> bool {
-        match self.0 {
-            Kind::Shutdown => true,
-            _ => false,
-        }
+        matches!(self.0, Kind::Shutdown)
     }
 
     /// Creates an error representing a timer at capacity.
@@ -53,10 +50,7 @@ impl Error {
 
     /// Returns `true` if the error was caused by the timer being at capacity.
     pub fn is_at_capacity(&self) -> bool {
-        match self.0 {
-            Kind::AtCapacity => true,
-            _ => false,
-        }
+        matches!(self.0, Kind::AtCapacity)
     }
 
     /// Create an error representing a misconfigured timer.
@@ -66,10 +60,7 @@ impl Error {
 
     /// Returns `true` if the error was caused by the timer being misconfigured.
     pub fn is_invalid(&self) -> bool {
-        match self.0 {
-            Kind::Invalid => true,
-            _ => false,
-        }
+        matches!(self.0, Kind::Invalid)
     }
 
     pub(crate) fn as_u8(&self) -> u8 {
diff --git a/tokio/tests/macros_select.rs b/tokio/tests/macros_select.rs
index f971409b..f77f3f01 100644
--- a/tokio/tests/macros_select.rs
+++ b/tokio/tests/macros_select.rs
@@ -152,7 +152,7 @@ async fn select_streams() {
         }
     }
 
-    msgs.sort();
+    msgs.sort_unstable();
     assert_eq!(&msgs[..], &[1, 2, 3]);
 }
 
diff --git a/tokio/tests/rt_common.rs b/tokio/tests/rt_common.rs
index 93d6a44e..56ab840d 100644
--- a/tokio/tests/rt_common.rs
+++ b/tokio/tests/rt_common.rs
@@ -206,7 +206,7 @@ rt_test! {
                 out.push(i);
             }
 
-            out.sort();
+            out.sort_unstable();
             out
         });
 
@@ -265,7 +265,7 @@ rt_test! {
                     out.push(i);
                 }
 
-                out.sort();
+                out.sort_unstable();
                 out
             }).await.unwrap()
         });
diff --git a/tokio/tests/stream_stream_map.rs b/tokio/tests/stream_stream_map.rs
index 6b498032..38bb0c5d 100644
--- a/tokio/tests/stream_stream_map.rs
+++ b/tokio/tests/stream_stream_map.rs
@@ -115,7 +115,7 @@ async fn multiple_entries() {
 
     assert_pending!(map.poll_next());
 
-    v.sort();
+    v.sort_unstable();
     assert_eq!(v[0].0, "bar");
     assert_eq!(v[0].1, 4);
     assert_eq!(v[1].0, "foo");
@@ -213,8 +213,7 @@ fn new_capacity_zero() {
     let map = StreamMap::<&str, stream::Pending<()>>::new();
     assert_eq!(0, map.capacity());
 
-    let keys = map.keys().collect::<Vec<_>>();
-    assert!(keys.is_empty());
+    assert!(map.keys().next().is_none());
 }
 
 #[test]
@@ -222,8 +221,7 @@ fn with_capacity() {
     let map = StreamMap::<&str, stream::Pending<()>>::with_capacity(10);
     assert!(10 <= map.capacity());
 
-    let keys = map.keys().collect::<Vec<_>>();
-    assert!(keys.is_empty());
+    assert!(map.keys().next().is_none());
 }
 
 #[test]
@@ -235,7 +233,7 @@ fn iter_keys() {
     map.insert("c", pending());
 
     let mut keys = map.keys().collect::<Vec<_>>();
-    keys.sort();
+    keys.sort_unstable();
 
     assert_eq!(&keys[..], &[&"a", &"b", &"c"]);
 }
@@ -250,7 +248,7 @@ fn iter_values() {
 
     let mut size_hints = map.values().map(|s| s.size_hint().0).collect::<Vec<_>>();
 
-    size_hints.sort();
+    size_hints.sort_unstable();
 
     assert_eq!(&size_hints[..], &[1, 2, 3]);
 }
@@ -268,7 +266,7 @@ fn iter_values_mut() {
         .map(|s: &mut _| s.size_hint().0)
         .collect::<Vec<_>>();
 
-    size_hints.sort();
+    size_hints.sort_unstable();
 
     assert_eq!(&size_hints[..], &[1, 2, 3]);
 }
diff --git a/tokio/tests/sync_broadcast.rs b/tokio/tests/sync_broadcast.rs
index d7e77e9d..7960eb85 100644
--- a/tokio/tests/sync_broadcast.rs
+++ b/tokio/tests/sync_broadcast.rs
@@ -492,8 +492,5 @@ fn lagging_receiver_recovers_after_wrap_open() {
 }
 
 fn is_closed(err: broadcast::RecvError) -> bool {
-    match err {
-        broadcast::RecvError::Closed => true,
-        _ => false,
-    }
+    matches!(err, broadcast::RecvError::Closed)
 }