1 files changed, 29 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/permissions_set_readonly_false.rs b/src/tools/clippy/tests/ui/permissions_set_readonly_false.rs
new file mode 100644
index 000000000..28c00d100
--- /dev/null
+++ b/src/tools/clippy/tests/ui/permissions_set_readonly_false.rs
@@ -0,0 +1,29 @@
+#![allow(unused)]
+#![warn(clippy::permissions_set_readonly_false)]
+
+use std::fs::File;
+
+struct A;
+
+impl A {
+    pub fn set_readonly(&mut self, b: bool) {}
+}
+
+fn set_readonly(b: bool) {}
+
+fn main() {
+    let f = File::create("foo.txt").unwrap();
+    let metadata = f.metadata().unwrap();
+    let mut permissions = metadata.permissions();
+    // lint here
+    permissions.set_readonly(false);
+    // no lint
+    permissions.set_readonly(true);
+
+    let mut a = A;
+    // no lint here - a is not of type std::fs::Permissions
+    a.set_readonly(false);
+
+    // no lint here - plain function
+    set_readonly(false);
+}