From 7ea40fba3c6267116e8e3497e6ce0e9af9f1ea56 Mon Sep 17 00:00:00 2001
From: Gino Valente <gino.valente.code@gmail.com>
Date: Sat, 27 Jan 2024 17:41:59 -0700
Subject: [PATCH] Add compile fail tests for custom where

---
 .../tests/reflect_derive/custom_where.fail.rs | 31 +++++++++++++++++++
 .../reflect_derive/custom_where.fail.stderr   | 11 +++++++
 .../tests/reflect_derive/custom_where.pass.rs | 31 +++++++++++++++++++
 3 files changed, 73 insertions(+)
 create mode 100644 crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.fail.rs
 create mode 100644 crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.fail.stderr
 create mode 100644 crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.pass.rs

diff --git a/crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.fail.rs b/crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.fail.rs
new file mode 100644
index 0000000000000..f10793a5f08a9
--- /dev/null
+++ b/crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.fail.rs
@@ -0,0 +1,31 @@
+use bevy_reflect::{Reflect, FromType};
+use std::marker::PhantomData;
+
+#[derive(Clone)]
+struct ReflectMyTrait;
+
+impl<T> FromType<T> for ReflectMyTrait {
+    fn from_type() -> Self {
+        Self
+    }
+}
+
+// Reason: where clause cannot be used with #[reflect(MyTrait)]
+#[derive(Reflect)]
+#[reflect(MyTrait, where)]
+pub struct Foo<T> {
+    value: String,
+    #[reflect(ignore)]
+    _marker: PhantomData<T>,
+}
+
+// Reason: where clause cannot be used with #[reflect(MyTrait)]
+#[derive(Reflect)]
+#[reflect(where, MyTrait)]
+pub struct Bar<T> {
+    value: String,
+    #[reflect(ignore)]
+    _marker: PhantomData<T>,
+}
+
+fn main() {}
\ No newline at end of file
diff --git a/crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.fail.stderr b/crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.fail.stderr
new file mode 100644
index 0000000000000..10916ef3541ae
--- /dev/null
+++ b/crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.fail.stderr
@@ -0,0 +1,11 @@
+error: expected identifier, found keyword `where`
+  --> tests/reflect_derive/custom_where.fail.rs:15:20
+   |
+15 | #[reflect(MyTrait, where)]
+   |                    ^^^^^
+
+error: unexpected token
+  --> tests/reflect_derive/custom_where.fail.rs:24:16
+   |
+24 | #[reflect(where, MyTrait)]
+   |                ^
diff --git a/crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.pass.rs b/crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.pass.rs
new file mode 100644
index 0000000000000..f6c4eede76e74
--- /dev/null
+++ b/crates/bevy_reflect_compile_fail_tests/tests/reflect_derive/custom_where.pass.rs
@@ -0,0 +1,31 @@
+use bevy_reflect::{Reflect, FromType};
+use std::marker::PhantomData;
+
+#[derive(Clone)]
+struct ReflectMyTrait;
+
+impl<T> FromType<T> for ReflectMyTrait {
+    fn from_type() -> Self {
+        Self
+    }
+}
+
+#[derive(Reflect)]
+#[reflect(MyTrait)]
+#[reflect(where)]
+pub struct Foo<T> {
+    value: String,
+    #[reflect(ignore)]
+    _marker: PhantomData<T>,
+}
+
+#[derive(Reflect)]
+#[reflect(where)]
+#[reflect(MyTrait)]
+pub struct Bar<T> {
+    value: String,
+    #[reflect(ignore)]
+    _marker: PhantomData<T>,
+}
+
+fn main() {}