1 files changed, 56 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/option_filter_map.stderr b/src/tools/clippy/tests/ui/option_filter_map.stderr
new file mode 100644
index 000000000..4a030ac9a
--- /dev/null
+++ b/src/tools/clippy/tests/ui/option_filter_map.stderr
@@ -0,0 +1,56 @@
+error: `filter` for `Some` followed by `unwrap`
+  --> $DIR/option_filter_map.rs:6:27
+   |
+LL |     let _ = Some(Some(1)).filter(Option::is_some).map(Option::unwrap);
+   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `flatten` instead: `flatten()`
+   |
+   = note: `-D clippy::option-filter-map` implied by `-D warnings`
+
+error: `filter` for `Some` followed by `unwrap`
+  --> $DIR/option_filter_map.rs:7:27
+   |
+LL |     let _ = Some(Some(1)).filter(|o| o.is_some()).map(|o| o.unwrap());
+   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `flatten` instead: `flatten()`
+
+error: `filter` for `Some` followed by `unwrap`
+  --> $DIR/option_filter_map.rs:8:35
+   |
+LL |     let _ = Some(1).map(odds_out).filter(Option::is_some).map(Option::unwrap);
+   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `flatten` instead: `flatten()`
+
+error: `filter` for `Some` followed by `unwrap`
+  --> $DIR/option_filter_map.rs:9:35
+   |
+LL |     let _ = Some(1).map(odds_out).filter(|o| o.is_some()).map(|o| o.unwrap());
+   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `flatten` instead: `flatten()`
+
+error: `filter` for `Some` followed by `unwrap`
+  --> $DIR/option_filter_map.rs:11:39
+   |
+LL |     let _ = vec![Some(1)].into_iter().filter(Option::is_some).map(Option::unwrap);
+   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `flatten` instead: `flatten()`
+
+error: `filter` for `Some` followed by `unwrap`
+  --> $DIR/option_filter_map.rs:12:39
+   |
+LL |     let _ = vec![Some(1)].into_iter().filter(|o| o.is_some()).map(|o| o.unwrap());
+   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `flatten` instead: `flatten()`
+
+error: `filter` for `Some` followed by `unwrap`
+  --> $DIR/option_filter_map.rs:16:10
+   |
+LL |           .filter(Option::is_some)
+   |  __________^
+LL | |         .map(Option::unwrap);
+   | |____________________________^ help: consider using `flatten` instead: `flatten()`
+
+error: `filter` for `Some` followed by `unwrap`
+  --> $DIR/option_filter_map.rs:21:10
+   |
+LL |           .filter(|o| o.is_some())
+   |  __________^
+LL | |         .map(|o| o.unwrap());
+   | |____________________________^ help: consider using `flatten` instead: `flatten()`
+
+error: aborting due to 8 previous errors
+