Check in remote-type test

tests/src/pg_remote_type.rs

@@ -0,0 +1,56 @@
+use crate::common::*;
+use diesel::prelude::*;
+
+#[cfg(feature = "postgres")]
+#[derive(diesel::sql_types::SqlType)]
+#[diesel(postgres_type(name = "my_remoate_enum"))]
+pub struct MyRemoteEnumMapping;
+
+table! {
+    use diesel::sql_types::Integer;
+    use super::MyRemoteEnumMapping;
+    test_remote {
+        id -> Integer,
+        my_enum -> MyRemoteEnumMapping,
+    }
+}
+
+#[derive(Insertable, Queryable, Identifiable, Debug, Clone, PartialEq)]
+#[diesel(table_name = test_remote)]
+struct Data {
+    id: i32,
+    my_enum: MyRemoteEnum
+}
+
+
+#[derive(Debug, PartialEq, Clone, diesel_derive_enum::DbEnum)]
+#[ExistingTypePath = "MyRemoteEnumMapping"]
+pub enum MyRemoteEnum {
+    This,
+    That
+}
+
+#[test]
+fn enum_round_trip() {
+    let connection = &mut get_connection();
+    use diesel::connection::SimpleConnection;
+
+    connection.batch_execute(
+        r#"
+        CREATE TYPE my_remote_enum AS ENUM ('foo', 'bar', 'baz_quxx');
+        CREATE TABLE test_remote (
+            id SERIAL PRIMARY KEY,
+            my_enum my_remote_enum NOT NULL
+        );
+    "#,
+    )
+    .unwrap();
+
+    create_table(connection);
+    let data = Data { id: 123, my_enum: MyRemoteEnum::This };
+    let res = diesel::insert_into(test_remote::table)
+        .values(&data)
+        .get_result(connection)
+        .unwrap();
+    assert_eq!(data, res);
+}