Split test test_adjacently_tagged_enum into four tests for each variant

(review this commit with "ignore whitespace changes" option on)

test_suite/tests/test_enum_adjacently_tagged.rs

@@ -11,8 +11,6 @@ use serde_test::{
     assert_de_tokens, assert_de_tokens_error, assert_ser_tokens, assert_tokens, Token,
 };
 
-#[test]
-fn test_adjacently_tagged_enum() {
 #[derive(Debug, PartialEq, Serialize, Deserialize)]
 #[serde(tag = "t", content = "c")]
 enum AdjacentlyTagged<T> {
@@ -22,6 +20,8 @@ fn test_adjacently_tagged_enum() {
     Struct { f: u8 },
 }
 
+#[test]
+fn unit() {
     // unit with no content
     assert_ser_tokens(
         &AdjacentlyTagged::Unit::<u8>,
@@ -118,7 +118,10 @@ fn test_adjacently_tagged_enum() {
             Token::StructEnd,
         ],
     );
+}
 
+#[test]
+fn newtype() {
     // newtype with tag first
     assert_tokens(
         &AdjacentlyTagged::Newtype::<u8>(1),
@@ -211,7 +214,10 @@ fn test_adjacently_tagged_enum() {
             Token::StructEnd,
         ],
     );
+}
 
+#[test]
+fn tuple() {
     // tuple with tag first
     assert_tokens(
         &AdjacentlyTagged::Tuple::<u8>(1, 1),
@@ -255,7 +261,10 @@ fn test_adjacently_tagged_enum() {
             Token::StructEnd,
         ],
     );
+}
 
+#[test]
+fn struct_() {
     // struct with tag first
     assert_tokens(
         &AdjacentlyTagged::Struct::<u8> { f: 1 },