test: Test derive Eq behavior (#1422)

Author: caspermeijn

tests/build.rs

@@ -100,6 +100,10 @@ fn main() {
         .compile_protos(&[src.join("derive_copy.proto")], includes)
         .unwrap();
 
+    config
+        .compile_protos(&[src.join("derive_eq.proto")], includes)
+        .unwrap();
+
     prost_build::Config::new()
         .compile_protos(&[src.join("default_string_escape.proto")], includes)
         .unwrap();

tests/src/derive_eq.proto

@@ -0,0 +1,52 @@
+syntax = "proto3";
+
+import "google/protobuf/timestamp.proto";
+
+package derive_eq;
+
+message EmptyMsg {}
+
+message IntegerMsg {
+  int32 field1 = 1;
+  int64 field2 = 2;
+  uint32 field3 = 3;
+  uint64 field4 = 4;
+  sint32 field5 = 5;
+  sint64 field6 = 6;
+  fixed32 field7 = 7;
+  fixed64 field8 = 8;
+  sfixed32 field9 = 9;
+  sfixed64 field10 = 10;
+}
+
+message BoolMsg { bool field1 = 1; }
+
+enum AnEnum {
+  A = 0;
+  B = 1;
+};
+
+message EnumMsg { AnEnum field1 = 1; }
+
+message StringMsg {
+  string field1 = 1;
+  bytes field2 = 2;
+}
+
+message OneOfMsg {
+  oneof data {
+    int32 field1 = 1;
+    int64 field2 = 2;
+  }
+}
+
+message ComposedMsg {
+  IntegerMsg field1 = 1;
+  EnumMsg field2 = 2;
+  OneOfMsg field3 = 3;
+  StringMsg field4 = 4;
+}
+
+message WellKnownMsg {
+  google.protobuf.Timestamp timestamp = 1;
+}

tests/src/derive_eq.rs

@@ -0,0 +1,21 @@
+#![allow(dead_code)]
+
+include!(concat!(env!("OUT_DIR"), "/derive_eq.rs"));
+
+trait TestEqIsImplemented: Eq {}
+
+impl TestEqIsImplemented for EmptyMsg {}
+
+impl TestEqIsImplemented for IntegerMsg {}
+
+impl TestEqIsImplemented for BoolMsg {}
+
+impl TestEqIsImplemented for AnEnum {}
+
+impl TestEqIsImplemented for EnumMsg {}
+
+impl TestEqIsImplemented for OneOfMsg {}
+
+impl TestEqIsImplemented for ComposedMsg {}
+
+impl TestEqIsImplemented for WellKnownMsg {}

tests/src/lib.rs

@@ -35,6 +35,8 @@ mod debug;
 #[cfg(test)]
 mod derive_copy;
 #[cfg(test)]
+mod derive_eq;
+#[cfg(test)]
 mod enum_keyword_variant;
 #[cfg(test)]
 mod generic_derive;