From 1335f8521322f22d666ab4cc0765243d78a77536 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Sun, 20 May 2018 13:53:29 -0700
Subject: [PATCH] Test transparent attribute

---
 test_suite/tests/test_annotations.rs | 39 ++++++++++++++++++++++++++++
 test_suite/tests/test_gen.rs         |  8 ++++++
 2 files changed, 47 insertions(+)

diff --git a/test_suite/tests/test_annotations.rs b/test_suite/tests/test_annotations.rs
index 5b82ad88..aea692cb 100644
--- a/test_suite/tests/test_annotations.rs
+++ b/test_suite/tests/test_annotations.rs
@@ -15,6 +15,7 @@ extern crate serde;
 use self::serde::de::{self, Unexpected};
 use self::serde::{Deserialize, Deserializer, Serialize, Serializer};
 use std::collections::HashMap;
+use std::marker::PhantomData;
 
 extern crate serde_test;
 use self::serde_test::{
@@ -2161,3 +2162,41 @@ fn test_flatten_option() {
         &[Token::Map { len: None }, Token::MapEnd],
     );
 }
+
+#[test]
+fn test_transparent_struct() {
+    #[derive(Serialize, Deserialize, PartialEq, Debug)]
+    #[serde(transparent)]
+    struct Transparent {
+        #[serde(skip)]
+        a: bool,
+        b: u32,
+        #[serde(skip)]
+        c: bool,
+        d: PhantomData<()>,
+    }
+
+    assert_tokens(
+        &Transparent {
+            a: false,
+            b: 1,
+            c: false,
+            d: PhantomData,
+        },
+        &[Token::U32(1)],
+    );
+}
+
+#[test]
+fn test_transparent_tuple_struct() {
+    #[derive(Serialize, Deserialize, PartialEq, Debug)]
+    #[serde(transparent)]
+    struct Transparent(
+        #[serde(skip)] bool,
+        u32,
+        #[serde(skip)] bool,
+        PhantomData<()>,
+    );
+
+    assert_tokens(&Transparent(false, 1, false, PhantomData), &[Token::U32(1)]);
+}
diff --git a/test_suite/tests/test_gen.rs b/test_suite/tests/test_gen.rs
index ffb73210..ef301b59 100644
--- a/test_suite/tests/test_gen.rs
+++ b/test_suite/tests/test_gen.rs
@@ -653,6 +653,14 @@ fn test_gen() {
             X,
         ),
     }
+
+    #[derive(Serialize, Deserialize)]
+    #[serde(transparent)]
+    struct TransparentWith {
+        #[serde(serialize_with = "ser_x")]
+        #[serde(deserialize_with = "de_x")]
+        x: X,
+    }
 }
 
 //////////////////////////////////////////////////////////////////////////