test(custom_debug): Merge skip_debug into custom_debug

- Rename `skip_debug` into `custom_debug`
- Move related tests to the module
- Make config dependency explicit in `build.rs`

tests/build.rs

@@ -44,7 +44,6 @@ fn main() {
     config.field_attribute("Foo.Custom.Attrs.AnotherEnum.D", "/// The D docs");
     config.field_attribute("Foo.Custom.Attrs.Msg.field.a", "/// Oneof A docs");
     config.field_attribute("Foo.Custom.Attrs.Msg.field.b", "/// Oneof B docs");
-    config.skip_debug(["custom_debug.Msg"]);
 
     config.file_descriptor_set_path(
         PathBuf::from(env::var("OUT_DIR").expect("OUT_DIR environment variable not set"))
@@ -103,7 +102,8 @@ fn main() {
         .compile_protos(&[src.join("default_string_escape.proto")], includes)
         .unwrap();
 
-    config
+    prost_build::Config::new()
+        .skip_debug(["custom_debug.Msg"])
         .compile_protos(&[src.join("custom_debug.proto")], includes)
         .unwrap();
 

tests/src/skip_debug.rs → tests/src/custom_debug.rs

@@ -1,27 +1,31 @@
 //! Tests for skipping the default Debug implementation.
 
-use std::fmt;
+include!(concat!(env!("OUT_DIR"), "/custom_debug.rs"));
 
-use prost::alloc::format;
-#[cfg(not(feature = "std"))]
-use prost::alloc::string::String;
+use alloc::format;
+use alloc::string::String;
+use alloc::string::ToString;
+use core::fmt;
 
-use crate::custom_debug::{msg, AnEnum, Msg};
-use crate::message_encoding::BasicEnumeration;
+impl fmt::Debug for Msg {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str("Msg {..}")
+    }
+}
 
 /// A special case with a tuple struct
 #[test]
 fn tuple_struct_custom_debug() {
     #[derive(Clone, PartialEq, prost::Message)]
     #[prost(skip_debug)]
-    struct NewType(#[prost(enumeration = "BasicEnumeration", tag = "5")] i32);
+    struct NewType(#[prost(enumeration = "AnEnum", tag = "5")] i32);
     impl fmt::Debug for NewType {
         fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
             f.write_str("NewType(custom_debug)")
         }
     }
     assert_eq!(
-        format!("{:?}", NewType(BasicEnumeration::TWO as i32)),
+        format!("{:?}", NewType(AnEnum::B as i32)),
         "NewType(custom_debug)"
     );
     assert_eq!(format!("{:?}", NewType(42)), "NewType(custom_debug)");
@@ -59,7 +63,7 @@ impl fmt::Debug for MessageWithOneofCustomDebug {
 /// Enumerations inside oneofs
 #[test]
 fn oneof_with_enum_custom_debug() {
-    let of = OneofWithEnumCustomDebug::Enumeration(BasicEnumeration::TWO as i32);
+    let of = OneofWithEnumCustomDebug::Enumeration(AnEnum::B as i32);
     assert_eq!(format!("{:?}", of), "OneofWithEnumCustomDebug {..}");
     let msg = MessageWithOneofCustomDebug { of: Some(of) };
     assert_eq!(format!("{:?}", msg), "MessageWithOneofCustomDebug {..}");

tests/src/lib.rs

@@ -49,16 +49,16 @@ mod no_shadowed_types;
 #[cfg(test)]
 mod no_unused_results;
 #[cfg(test)]
-#[cfg(feature = "std")]
-mod skip_debug;
-#[cfg(test)]
 mod submessage_without_package;
 #[cfg(test)]
 mod type_names;
 
 #[cfg(test)]
 mod boxed_field;
 
+#[cfg(test)]
+mod custom_debug;
+
 mod test_enum_named_option_value {
     include!(concat!(env!("OUT_DIR"), "/myenum.optionn.rs"));
 }
@@ -89,17 +89,6 @@ pub mod recursive_oneof {
     include!(concat!(env!("OUT_DIR"), "/recursive_oneof.rs"));
 }
 
-#[cfg(feature = "std")]
-pub mod custom_debug {
-    use std::fmt;
-    include!(concat!(env!("OUT_DIR"), "/custom_debug.rs"));
-    impl fmt::Debug for Msg {
-        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-            f.write_str("Msg {..}")
-        }
-    }
-}
-
 /// This tests the custom attributes support by abusing docs.
 ///
 /// Docs really are full-blown attributes. So we use them to ensure we can place them on everything