1 files changed, 88 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/option_map_unit_fn_fixable.rs b/src/tools/clippy/tests/ui/option_map_unit_fn_fixable.rs
new file mode 100644
index 000000000..f3e5b62c6
--- /dev/null
+++ b/src/tools/clippy/tests/ui/option_map_unit_fn_fixable.rs
@@ -0,0 +1,88 @@
+// run-rustfix
+
+#![warn(clippy::option_map_unit_fn)]
+#![allow(unused)]
+#![allow(clippy::unnecessary_wraps)]
+
+fn do_nothing<T>(_: T) {}
+
+fn diverge<T>(_: T) -> ! {
+    panic!()
+}
+
+fn plus_one(value: usize) -> usize {
+    value + 1
+}
+
+fn option() -> Option<usize> {
+    Some(10)
+}
+
+struct HasOption {
+    field: Option<usize>,
+}
+
+impl HasOption {
+    fn do_option_nothing(&self, value: usize) {}
+
+    fn do_option_plus_one(&self, value: usize) -> usize {
+        value + 1
+    }
+}
+#[rustfmt::skip]
+fn option_map_unit_fn() {
+    let x = HasOption { field: Some(10) };
+
+    x.field.map(plus_one);
+    let _ : Option<()> = x.field.map(do_nothing);
+
+    x.field.map(do_nothing);
+
+    x.field.map(do_nothing);
+
+    x.field.map(diverge);
+
+    let captured = 10;
+    if let Some(value) = x.field { do_nothing(value + captured) };
+    let _ : Option<()> = x.field.map(|value| do_nothing(value + captured));
+
+    x.field.map(|value| x.do_option_nothing(value + captured));
+
+    x.field.map(|value| { x.do_option_plus_one(value + captured); });
+
+
+    x.field.map(|value| do_nothing(value + captured));
+
+    x.field.map(|value| { do_nothing(value + captured) });
+
+    x.field.map(|value| { do_nothing(value + captured); });
+
+    x.field.map(|value| { { do_nothing(value + captured); } });
+
+
+    x.field.map(|value| diverge(value + captured));
+
+    x.field.map(|value| { diverge(value + captured) });
+
+    x.field.map(|value| { diverge(value + captured); });
+
+    x.field.map(|value| { { diverge(value + captured); } });
+
+
+    x.field.map(|value| plus_one(value + captured));
+    x.field.map(|value| { plus_one(value + captured) });
+    x.field.map(|value| { let y = plus_one(value + captured); });
+
+    x.field.map(|value| { plus_one(value + captured); });
+
+    x.field.map(|value| { { plus_one(value + captured); } });
+
+
+    x.field.map(|ref value| { do_nothing(value + captured) });
+
+    option().map(do_nothing);
+
+    option().map(|value| println!("{:?}", value));
+}
+
+fn main() {}