Copybara import of the project:

--
064b263c42 by Anton Grbin <anton@noom.com>:

squash and rebase

COPYBARA_INTEGRATE_REVIEW=https://github.com/protocolbuffers/protobuf/pull/9534 from noom:anton/MIN-2347/json_conformance_unknown_fields 064b263c42
PiperOrigin-RevId: 488667851

conformance/binary_json_conformance_suite.cc

@@ -1766,6 +1766,7 @@ void BinaryAndJsonConformanceSuite::RunJsonTests() {
   RunJsonTestsForStruct();
   RunJsonTestsForValue();
   RunJsonTestsForAny();
+  RunJsonTestsForUnknownEnumStringValues();
 
   RunValidJsonIgnoreUnknownTest("IgnoreUnknownJsonNumber", REQUIRED,
                                 R"({
@@ -1801,6 +1802,41 @@ void BinaryAndJsonConformanceSuite::RunJsonTests() {
   ExpectParseFailureForJson("RejectTopLevelNull", REQUIRED, "null");
 }
 
+void BinaryAndJsonConformanceSuite::RunJsonTestsForUnknownEnumStringValues() {
+  // Tests the handling of unknown enum values when encoded as string labels.
+  // The expected behavior depends on whether unknown fields are ignored:
+  // * when ignored, the parser should ignore the unknown enum string value.
+  // * when not ignored, the parser should fail.
+  struct TestCase {
+    // Used in the test name.
+    string enum_location;
+    // JSON input which will contain the unknown field.
+    string input_json;
+  };
+  const std::vector<TestCase> test_cases = {
+      {"InOptionalField", R"json({
+      "optional_nested_enum": "UNKNOWN_ENUM_VALUE"
+    })json"},
+      {"InRepeatedField", R"json({
+      "repeated_nested_enum": ["UNKNOWN_ENUM_VALUE"]
+    })json"},
+      {"InMapValue", R"json({
+      "map_string_nested_enum": {"key": "UNKNOWN_ENUM_VALUE"}
+    })json"},
+  };
+  for (const TestCase& test_case : test_cases) {
+    // Unknown enum string value is a parse failure when not ignoring unknown
+    // fields.
+    ExpectParseFailureForJson(
+        absl::StrCat("RejectUnknownEnumStringValue", test_case.enum_location),
+        RECOMMENDED, test_case.input_json);
+    // Unknown enum string value is ignored when ignoring unknown fields.
+    RunValidJsonIgnoreUnknownTest(
+        absl::StrCat("IgnoreUnknownEnumStringValue", test_case.enum_location),
+        RECOMMENDED, test_case.input_json, "");
+  }
+}
+
 void BinaryAndJsonConformanceSuite::RunJsonTestsForFieldNameConvention() {
   RunValidJsonTest(
       "FieldNameInSnakeCase", REQUIRED,

conformance/binary_json_conformance_suite.h

@@ -56,6 +56,7 @@ class BinaryAndJsonConformanceSuite : public ConformanceTestSuite {
   void RunJsonTestsForStruct();
   void RunJsonTestsForValue();
   void RunJsonTestsForAny();
+  void RunJsonTestsForUnknownEnumStringValues();
   void RunValidJsonTest(const std::string& test_name, ConformanceLevel level,
                         const std::string& input_json,
                         const std::string& equivalent_text_format);

conformance/failure_list_cpp.txt

@@ -17,6 +17,8 @@ Recommended.Proto3.JsonInput.FieldNameDuplicate
 Recommended.Proto3.JsonInput.FieldNameDuplicateDifferentCasing1
 Recommended.Proto3.JsonInput.FieldNameDuplicateDifferentCasing2
 Recommended.Proto3.JsonInput.FieldNameNotQuoted
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInMapValue.ProtobufOutput
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInRepeatedField.ProtobufOutput
 Recommended.Proto3.JsonInput.MapFieldValueIsNull
 Recommended.Proto3.JsonInput.RepeatedFieldMessageElementIsNull
 Recommended.Proto3.JsonInput.RepeatedFieldPrimitiveElementIsNull

conformance/failure_list_php.txt

@@ -5,6 +5,8 @@ Recommended.Proto2.JsonInput.FieldNameExtension.Validator
 Recommended.Proto3.JsonInput.BytesFieldBase64Url.JsonOutput
 Recommended.Proto3.JsonInput.BytesFieldBase64Url.ProtobufOutput
 Recommended.Proto3.JsonInput.FieldMaskInvalidCharacter
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInMapValue.ProtobufOutput
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInRepeatedField.ProtobufOutput
 Recommended.Proto3.ProtobufInput.ValidDataOneofBinary.MESSAGE.Merge.ProtobufOutput
 Required.Proto2.JsonInput.StoresDefaultPrimitive.Validator
 Required.Proto3.JsonInput.DoubleFieldTooSmall

conformance/failure_list_php_c.txt

@@ -1,2 +1,4 @@
 Recommended.Proto2.JsonInput.FieldNameExtension.Validator
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInMapValue.ProtobufOutput
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInRepeatedField.ProtobufOutput
 Required.Proto2.JsonInput.StoresDefaultPrimitive.Validator

conformance/failure_list_python.txt

@@ -0,0 +1,3 @@
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInMapValue.ProtobufOutput
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInOptionalField.ProtobufOutput
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInRepeatedField.ProtobufOutput

conformance/failure_list_python_cpp.txt

@@ -6,3 +6,6 @@
 #
 # TODO(haberman): insert links to corresponding bugs tracking the issue.
 # Should we use GitHub issues or the Google-internal bug tracker?
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInMapValue.ProtobufOutput
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInOptionalField.ProtobufOutput
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInRepeatedField.ProtobufOutput

conformance/failure_list_ruby.txt

@@ -27,6 +27,8 @@ Recommended.Proto2.ProtobufInput.ValidDataRepeated.UINT32.PackedInput.PackedOutp
 Recommended.Proto2.ProtobufInput.ValidDataRepeated.UINT32.UnpackedInput.PackedOutput.ProtobufOutput
 Recommended.Proto2.ProtobufInput.ValidDataRepeated.UINT64.PackedInput.PackedOutput.ProtobufOutput
 Recommended.Proto2.ProtobufInput.ValidDataRepeated.UINT64.UnpackedInput.PackedOutput.ProtobufOutput
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInMapValue.ProtobufOutput
+Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInRepeatedField.ProtobufOutput
 Recommended.Proto3.ProtobufInput.ValidDataOneofBinary.MESSAGE.Merge.ProtobufOutput
 Recommended.Proto3.ProtobufInput.ValidDataRepeated.BOOL.PackedInput.UnpackedOutput.ProtobufOutput
 Recommended.Proto3.ProtobufInput.ValidDataRepeated.BOOL.UnpackedInput.UnpackedOutput.ProtobufOutput