1 files changed, 46 insertions, 0 deletions
diff --git a/tests/ui/lint/unused/unused-doc-comments-edge-cases.rs b/tests/ui/lint/unused/unused-doc-comments-edge-cases.rs
new file mode 100644
index 000000000..54d86c31f
--- /dev/null
+++ b/tests/ui/lint/unused/unused-doc-comments-edge-cases.rs
@@ -0,0 +1,46 @@
+#![deny(unused_doc_comments)]
+
+fn doc_comment_on_match_arms(num: u8) -> bool {
+    match num {
+        3 => true,
+        /// useless doc comment
+        //~^ ERROR: unused doc comment
+        _ => false,
+    }
+}
+
+fn doc_comment_between_if_else(num: u8) -> bool {
+    if num == 3 {
+        true //~ ERROR: mismatched types
+    }
+    /// useless doc comment
+    else { //~ ERROR: expected expression, found keyword `else`
+        false
+    }
+}
+
+fn doc_comment_on_expr(num: u8) -> bool {
+    /// useless doc comment
+    //~^ ERROR: attributes on expressions are experimental
+    //~| ERROR: unused doc comment
+    num == 3
+}
+
+fn doc_comment_on_generic<#[doc = "x"] T>(val: T) {}
+//~^ ERROR: unused doc comment
+
+fn doc_comment_on_block() {
+    /// unused doc comment
+    //~^ ERROR: unused doc comment
+    {
+        let x = 12;
+    }
+}
+
+/// unused doc comment
+//~^ ERROR: unused doc comment
+extern "C" {
+    fn foo();
+}
+
+fn main() {}