Rollup merge of #143118 - Kivooeo:tf15, r=tgross35

`tests/ui`: A New Order [15/N]

> [!NOTE]
>
> Intermediate commits are intended to help review, but will be squashed prior to merge.

Some `tests/ui/` housekeeping, to trim down number of tests directly under `tests/ui/`. Part of rust-lang/rust#133895.

r? `@jieyouxu`

1 files changed, 30 insertions, 0 deletions

diff --git a/tests/ui/derives/derive-Debug-enum-variants.rs b/tests/ui/derives/derive-Debug-enum-variants.rs
new file mode 100644
index 00000000000..26f527f7664
--- /dev/null
+++ b/tests/ui/derives/derive-Debug-enum-variants.rs
@@ -0,0 +1,30 @@
+//! Test that `#[derive(Debug)]` for enums correctly formats variant names.
+
+//@ run-pass
+
+#[derive(Debug)]
+enum Foo {
+    A(usize),
+    C,
+}
+
+#[derive(Debug)]
+enum Bar {
+    D,
+}
+
+pub fn main() {
+    // Test variant with data
+    let foo_a = Foo::A(22);
+    assert_eq!("A(22)".to_string(), format!("{:?}", foo_a));
+
+    if let Foo::A(value) = foo_a {
+        println!("Value: {}", value); // This needs to remove #[allow(dead_code)]
+    }
+
+    // Test unit variant
+    assert_eq!("C".to_string(), format!("{:?}", Foo::C));
+
+    // Test unit variant from different enum
+    assert_eq!("D".to_string(), format!("{:?}", Bar::D));
+}