1 files changed, 89 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/unnecessary_literal_unwrap.rs b/src/tools/clippy/tests/ui/unnecessary_literal_unwrap.rs
new file mode 100644
index 000000000..b43e4d3a3
--- /dev/null
+++ b/src/tools/clippy/tests/ui/unnecessary_literal_unwrap.rs
@@ -0,0 +1,89 @@
+//@run-rustfix
+#![warn(clippy::unnecessary_literal_unwrap)]
+#![allow(unreachable_code)]
+#![allow(
+    clippy::unnecessary_lazy_evaluations,
+    clippy::diverging_sub_expression,
+    clippy::let_unit_value,
+    clippy::no_effect
+)]
+
+fn unwrap_option_some() {
+    let _val = Some(1).unwrap();
+    let _val = Some(1).expect("this never happens");
+
+    Some(1).unwrap();
+    Some(1).expect("this never happens");
+}
+
+#[rustfmt::skip] // force rustfmt not to remove braces in `|| { 234 }`
+fn unwrap_option_none() {
+    let _val = None::<()>.unwrap();
+    let _val = None::<()>.expect("this always happens");
+    let _val: String = None.unwrap_or_default();
+    let _val: u16 = None.unwrap_or(234);
+    let _val: u16 = None.unwrap_or_else(|| 234);
+    let _val: u16 = None.unwrap_or_else(|| { 234 });
+    let _val: u16 = None.unwrap_or_else(|| -> u16 { 234 });
+
+    None::<()>.unwrap();
+    None::<()>.expect("this always happens");
+    None::<String>.unwrap_or_default();
+    None::<u16>.unwrap_or(234);
+    None::<u16>.unwrap_or_else(|| 234);
+    None::<u16>.unwrap_or_else(|| { 234 });
+    None::<u16>.unwrap_or_else(|| -> u16 { 234 });
+}
+
+fn unwrap_result_ok() {
+    let _val = Ok::<_, ()>(1).unwrap();
+    let _val = Ok::<_, ()>(1).expect("this never happens");
+    let _val = Ok::<_, ()>(1).unwrap_err();
+    let _val = Ok::<_, ()>(1).expect_err("this always happens");
+
+    Ok::<_, ()>(1).unwrap();
+    Ok::<_, ()>(1).expect("this never happens");
+    Ok::<_, ()>(1).unwrap_err();
+    Ok::<_, ()>(1).expect_err("this always happens");
+}
+
+fn unwrap_result_err() {
+    let _val = Err::<(), _>(1).unwrap_err();
+    let _val = Err::<(), _>(1).expect_err("this never happens");
+    let _val = Err::<(), _>(1).unwrap();
+    let _val = Err::<(), _>(1).expect("this always happens");
+
+    Err::<(), _>(1).unwrap_err();
+    Err::<(), _>(1).expect_err("this never happens");
+    Err::<(), _>(1).unwrap();
+    Err::<(), _>(1).expect("this always happens");
+}
+
+fn unwrap_methods_option() {
+    let _val = Some(1).unwrap_or(2);
+    let _val = Some(1).unwrap_or_default();
+    let _val = Some(1).unwrap_or_else(|| 2);
+
+    Some(1).unwrap_or(2);
+    Some(1).unwrap_or_default();
+    Some(1).unwrap_or_else(|| 2);
+}
+
+fn unwrap_methods_result() {
+    let _val = Ok::<_, ()>(1).unwrap_or(2);
+    let _val = Ok::<_, ()>(1).unwrap_or_default();
+    let _val = Ok::<_, ()>(1).unwrap_or_else(|_| 2);
+
+    Ok::<_, ()>(1).unwrap_or(2);
+    Ok::<_, ()>(1).unwrap_or_default();
+    Ok::<_, ()>(1).unwrap_or_else(|_| 2);
+}
+
+fn main() {
+    unwrap_option_some();
+    unwrap_option_none();
+    unwrap_result_ok();
+    unwrap_result_err();
+    unwrap_methods_option();
+    unwrap_methods_result();
+}