Revert "THRIFT-4951: Remove senum from tests"

This reverts commit df8ef4b.

The contributor confuses "deprecated" with "unsupported". Unless the feature as a whole is also removed, so essentially nothing is left to be tested. Regardless whether a particular feature is deprecated or not, removing a working test for it is NOT helpful. The only "achievement" of such efforts would be that the test coverage goes down, which is clearly not in our intention and only opens room for bugs and issues.

test/AnnotationTest.thrift

@@ -49,6 +49,14 @@ enum weekdays {
   SATURDAY ( weekend = "yes" )
 } (foo.bar="baz")
 
+/* Note that annotations on senum values are not supported. */
+senum seasons {
+  "Spring",
+  "Summer",
+  "Fall",
+  "Winter"
+} ( foo = "bar" )
+
 struct ostr_default {
   1: i32 bar;
 }

test/SmallTest.thrift

@@ -24,6 +24,12 @@ struct Goodbyez {
   1: i32 val = 325;
 }
 
+senum Thinger {
+  "ASDFKJ",
+  "r32)*F#@",
+  "ASDFLJASDF"
+}
+
 struct BoolPasser {
   1: bool value = 1
 }
@@ -47,6 +53,7 @@ exception Goodbye {
 }
 
 service SmallService {
+  Thinger testThinger(1:Thinger bootz),
   Hello testMe(1:i32 hello=64, 2: Hello wonk) throws (1: Goodbye g),
   void testVoid() throws (1: Goodbye g),
   i32 testI32(1:i32 boo)