added a test for type renaming

Author: NicholasLYang

diesel_cli/tests/print_schema/print_schema_type_renaming/diesel.toml

@@ -0,0 +1,3 @@
+[print_schema]
+file = "src/schema.rs"
+with_docs = true

diesel_cli/tests/print_schema/print_schema_type_renaming/postgres/expected.rs

@@ -0,0 +1,19 @@
+table! {
+    /// Representation of the `users` table.
+    ///
+    /// (Automatically generated by Diesel.)
+    users (id) {
+        /// The `id` column of the `users` table.
+        ///
+        /// Its SQL type is `Int4`.
+        ///
+        /// (Automatically generated by Diesel.)
+        id -> Int4,
+        /// The `job` column of the `users` table.
+        ///
+        /// Its SQL type is `UserJob`.
+        ///
+        /// (Automatically generated by Diesel.)
+        job -> UserJob
+    }
+}

diesel_cli/tests/print_schema/print_schema_type_renaming/postgres/schema.sql

@@ -0,0 +1,7 @@
+CREATE TYPE user_job AS ENUM ('programmer', 'director', 'writer', 'mathematician');
+
+CREATE TABLE users (
+    id INTEGER PRIMARY KEY,
+    job user_job NOT NULL
+);
+