1 files changed, 141 insertions, 0 deletions
diff --git a/third_party/rust/derive_more/tests/into.rs b/third_party/rust/derive_more/tests/into.rs
new file mode 100644
index 0000000000..075abd1c98
--- /dev/null
+++ b/third_party/rust/derive_more/tests/into.rs
@@ -0,0 +1,141 @@
+#![allow(dead_code)]
+#[macro_use]
+extern crate derive_more;
+
+use std::borrow::Cow;
+
+#[derive(Into)]
+#[into(owned, ref, ref_mut)]
+struct EmptyTuple();
+
+#[derive(Into)]
+#[into(owned, ref, ref_mut)]
+struct EmptyStruct {}
+
+#[derive(Into)]
+#[into(owned, ref, ref_mut)]
+struct EmptyUnit;
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[derive(Into)]
+#[into(owned(types(i64, i128)), ref, ref_mut)]
+struct MyInt(i32);
+
+#[test]
+fn explicit_types_struct_owned_only() {
+    assert_eq!(i32::from(MyInt(42)), 42i32);
+    assert_eq!(<&i32>::from(&MyInt(42)), &42i32);
+    assert_eq!(<&mut i32>::from(&mut MyInt(42)), &mut 42i32);
+    assert_eq!(i64::from(MyInt(42)), 42i64);
+    assert_eq!(i128::from(MyInt(42)), 42i128);
+}
+
+#[derive(Into)]
+#[into(owned, ref, ref_mut)]
+struct MyInts(i32, i32);
+
+#[derive(Into)]
+#[into(owned, ref, ref_mut)]
+struct Point1D {
+    x: i32,
+}
+
+#[derive(Debug, Eq, PartialEq)]
+#[derive(Into)]
+#[into(owned, ref, ref_mut)]
+struct Point2D {
+    x: i32,
+    y: i32,
+}
+
+#[derive(Into)]
+#[into(owned, ref, ref_mut)]
+struct Point2DWithIgnored {
+    x: i32,
+    y: i32,
+    #[into(ignore)]
+    useless: bool,
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[derive(Into)]
+#[into(owned(types(i64, i128)), ref, ref_mut, types(i32))]
+struct MyIntExplicit(MyInt);
+
+#[test]
+fn explicit_types_struct_all() {
+    let mut input = MyIntExplicit(MyInt(42));
+    assert_eq!(MyInt::from(input), MyInt(42));
+    assert_eq!(<&MyInt>::from(&input), &MyInt(42));
+    assert_eq!(<&mut MyInt>::from(&mut input), &mut MyInt(42));
+    assert_eq!(i32::from(input), 42i32);
+    assert_eq!(<&i32>::from(&input), &42i32);
+    assert_eq!(<&mut i32>::from(&mut input), &mut 42i32);
+    assert_eq!(i64::from(input), 42i64);
+    assert_eq!(i128::from(input), 42i128);
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[derive(Into)]
+#[into(owned(types(i32, i64, i128)), ref(types(i32)), ref_mut(types(i32)))]
+struct MyIntsExplicit(i32, MyInt, MyIntExplicit);
+
+#[test]
+fn explicit_types_struct_tupled() {
+    let mut input = MyIntsExplicit(42i32, MyInt(42), MyIntExplicit(MyInt(42)));
+    assert_eq!(
+        <(i32, MyInt, MyIntExplicit)>::from(input),
+        (42i32, MyInt(42), MyIntExplicit(MyInt(42))),
+    );
+    assert_eq!(
+        <(&i32, &MyInt, &MyIntExplicit)>::from(&input),
+        (&42i32, &MyInt(42), &MyIntExplicit(MyInt(42))),
+    );
+    assert_eq!(
+        <(&mut i32, &mut MyInt, &mut MyIntExplicit)>::from(&mut input),
+        (&mut 42i32, &mut MyInt(42), &mut MyIntExplicit(MyInt(42))),
+    );
+    assert_eq!(<(i32, i32, i32)>::from(input), (42i32, 42i32, 42i32));
+    assert_eq!(<(&i32, &i32, &i32)>::from(&input), (&42i32, &42i32, &42i32));
+    assert_eq!(
+        <(&mut i32, &mut i32, &mut i32)>::from(&mut input),
+        (&mut 42i32, &mut 42i32, &mut 42i32),
+    );
+    assert_eq!(<(i64, i64, i64)>::from(input), (42i64, 42i64, 42i64));
+    assert_eq!(<(i128, i128, i128)>::from(input), (42i128, 42i128, 42i128));
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[derive(Into)]
+#[into(owned, ref, ref_mut, types(i32))]
+struct Point2DExplicit {
+    x: MyInt,
+    y: MyInt,
+}
+
+#[test]
+fn explicit_types_point_2d() {
+    let mut input = Point2DExplicit {
+        x: MyInt(42),
+        y: MyInt(42),
+    };
+    assert_eq!(<(i32, i32)>::from(input), (42i32, 42i32));
+    assert_eq!(<(&i32, &i32)>::from(&input), (&42i32, &42i32));
+    assert_eq!(
+        <(&mut i32, &mut i32)>::from(&mut input),
+        (&mut 42i32, &mut 42i32)
+    );
+}
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+#[derive(Into)]
+#[into(owned(types("Cow<'_, str>")))]
+struct Name(String);
+
+#[test]
+fn explicit_complex_types_name() {
+    let name = "Ñolofinwë";
+    let input = Name(name.to_owned());
+    assert_eq!(String::from(input.clone()), name.to_owned());
+    assert_eq!(Cow::from(input.clone()), Cow::Borrowed(name));
+}