Print out the type name for monostate types.

PiperOrigin-RevId: 683791878
google · Oct 8, 2024 · 8813518 · 8813518
1 parent 9f67235
commit 8813518
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Showing 3 changed files with 4 additions and 4 deletions.
diff --git a/e2e_tests/functional_test.cc b/e2e_tests/functional_test.cc
@@ -408,7 +408,7 @@ TEST_F(UnitTestModeTest, WorksWithStructsWithEmptyFields) {
   auto [status, std_out, std_err] =
       Run("MySuite.WorksWithStructsWithEmptyFields");
   EXPECT_THAT(status, Eq(Signal(SIGABRT)));
-  EXPECT_THAT(std_err, HasSubstr("argument 0: ContainsEmpty{{}}"));
+  EXPECT_THAT(std_err, HasSubstr("argument 0: ContainsEmpty{Empty{}}"));
 }
 
 TEST_F(UnitTestModeTest, WorksWithEmptyInheritance) {

diff --git a/fuzztest/internal/type_support.h b/fuzztest/internal/type_support.h
@@ -310,7 +310,7 @@ struct MonostatePrinter {
   template <typename T>
   void PrintUserValue(const T&, domain_implementor::RawSink out,
                       domain_implementor::PrintMode) const {
-    absl::Format(out, "{}");
+    absl::Format(out, "%s{}", GetTypeNameIfUserDefined<T>());
   }
 };
 

diff --git a/fuzztest/internal/type_support_test.cc b/fuzztest/internal/type_support_test.cc
@@ -464,15 +464,15 @@ TEST(ConstructorOfTest, Printer) {
 
   struct UserDefined {};
   EXPECT_THAT(TestPrintValue({}, ConstructorOf<UserDefined>()),
-              ElementsAre("{}", "UserDefined()"));
+              ElementsAre("UserDefined{}", "UserDefined()"));
 }
 
 TEST(MonostateTest, Printer) {
   struct UserDefinedEmpty {};
   EXPECT_THAT(TestPrintValue(std::monostate{}), Each("{}"));
   EXPECT_THAT(TestPrintValue(std::tuple{}), Each("{}"));
   EXPECT_THAT(TestPrintValue(std::array<int, 0>{}), Each("{}"));
-  EXPECT_THAT(TestPrintValue(UserDefinedEmpty{}), Each("{}"));
+  EXPECT_THAT(TestPrintValue(UserDefinedEmpty{}), Each("UserDefinedEmpty{}"));
 }
 
 struct AggregateStructWithNoAbslStringify {