1 files changed, 19 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/filter_map_identity.rs b/src/tools/clippy/tests/ui/filter_map_identity.rs
new file mode 100644
index 000000000..7e998b9cd
--- /dev/null
+++ b/src/tools/clippy/tests/ui/filter_map_identity.rs
@@ -0,0 +1,19 @@
+// run-rustfix
+
+#![allow(unused_imports, clippy::needless_return)]
+#![warn(clippy::filter_map_identity)]
+
+fn main() {
+    let iterator = vec![Some(1), None, Some(2)].into_iter();
+    let _ = iterator.filter_map(|x| x);
+
+    let iterator = vec![Some(1), None, Some(2)].into_iter();
+    let _ = iterator.filter_map(std::convert::identity);
+
+    use std::convert::identity;
+    let iterator = vec![Some(1), None, Some(2)].into_iter();
+    let _ = iterator.filter_map(identity);
+
+    let iterator = vec![Some(1), None, Some(2)].into_iter();
+    let _ = iterator.filter_map(|x| return x);
+}