1 files changed, 27 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/option_filter_map.rs b/src/tools/clippy/tests/ui/option_filter_map.rs
new file mode 100644
index 000000000..7abaaa0fb
--- /dev/null
+++ b/src/tools/clippy/tests/ui/option_filter_map.rs
@@ -0,0 +1,27 @@
+// run-rustfix
+#![warn(clippy::option_filter_map)]
+#![allow(clippy::map_flatten)]
+
+fn main() {
+    let _ = Some(Some(1)).filter(Option::is_some).map(Option::unwrap);
+    let _ = Some(Some(1)).filter(|o| o.is_some()).map(|o| o.unwrap());
+    let _ = Some(1).map(odds_out).filter(Option::is_some).map(Option::unwrap);
+    let _ = Some(1).map(odds_out).filter(|o| o.is_some()).map(|o| o.unwrap());
+
+    let _ = vec![Some(1)].into_iter().filter(Option::is_some).map(Option::unwrap);
+    let _ = vec![Some(1)].into_iter().filter(|o| o.is_some()).map(|o| o.unwrap());
+    let _ = vec![1]
+        .into_iter()
+        .map(odds_out)
+        .filter(Option::is_some)
+        .map(Option::unwrap);
+    let _ = vec![1]
+        .into_iter()
+        .map(odds_out)
+        .filter(|o| o.is_some())
+        .map(|o| o.unwrap());
+}
+
+fn odds_out(x: i32) -> Option<i32> {
+    if x % 2 == 0 { Some(x) } else { None }
+}