1 files changed, 57 insertions, 0 deletions
diff --git a/tests/ui/lint/unused_braces.rs b/tests/ui/lint/unused_braces.rs
new file mode 100644
index 000000000..0d260d2cb
--- /dev/null
+++ b/tests/ui/lint/unused_braces.rs
@@ -0,0 +1,57 @@
+// check-pass
+// run-rustfix
+
+#![warn(unused_braces, unused_parens)]
+#![allow(unreachable_code, unused_unsafe)] // for rustfix
+
+fn consume<T>(_: T) {}
+
+fn main() {
+    let _ = (7);
+    //~^WARN unnecessary parentheses
+
+    // Do not emit a lint in these cases,
+    // as we have to be careful with
+    // `ref` patterns.
+    {
+        let _ = { 7 };
+
+        if let 7 = { 7 } { }
+
+        match { 7 } {
+            _ => (),
+        }
+    }
+
+    if { true } {
+        //~^ WARN unnecessary braces
+    }
+
+    while { false } {
+        //~^ WARN unnecessary braces
+    }
+
+    let _: [u8; { 3 }];
+    //~^ WARN unnecessary braces
+
+    consume({ 7 });
+    //~^ WARN unnecessary braces
+
+    // Do not emit lint for multiline blocks.
+    let _ = {
+        7
+    };
+
+    // Do not emit lint for unsafe blocks.
+    let _ = unsafe { 7 };
+
+    // Do not emit lint, as the `{` would then
+    // be parsed as part of the `return`.
+    if { return } {
+
+    }
+
+    // regression test for https://github.com/rust-lang/rust/issues/106899
+    return { println!("!") };
+    //~^ WARN unnecessary braces
+}