1 files changed, 284 insertions, 0 deletions
diff --git a/csharp/ProtocolBuffers.Test/UnknownFieldSetTest.cs b/csharp/ProtocolBuffers.Test/UnknownFieldSetTest.cs
new file mode 100644
index 00000000..d0a2c540
--- /dev/null
+++ b/csharp/ProtocolBuffers.Test/UnknownFieldSetTest.cs
@@ -0,0 +1,284 @@
+using System;
+using System.Collections.Generic;
+using Google.ProtocolBuffers.Descriptors;
+using Google.ProtocolBuffers.TestProtos;
+using NUnit.Framework;
+
+namespace Google.ProtocolBuffers {
+  [TestFixture]
+  public class UnknownFieldSetTest {
+
+    private MessageDescriptor descriptor;
+    private TestAllTypes allFields;
+    private ByteString allFieldsData;
+
+    /// <summary>
+    /// An empty message that has been parsed from allFieldsData.  So, it has
+    /// unknown fields of every type.
+    /// </summary>
+    private TestEmptyMessage emptyMessage;
+    private UnknownFieldSet unknownFields;
+
+    [SetUp]
+    public void SetUp() {
+      descriptor = TestAllTypes.Descriptor;
+      allFields = TestUtil.GetAllSet();
+      allFieldsData = allFields.ToByteString();
+      emptyMessage = TestEmptyMessage.ParseFrom(allFieldsData);
+      unknownFields = emptyMessage.UnknownFields;
+    }
+
+    private UnknownField GetField(String name) {
+      FieldDescriptor field = descriptor.FindDescriptor<FieldDescriptor>(name);
+      Assert.IsNotNull(field);
+      return unknownFields.FieldDictionary[field.FieldNumber];
+    }
+
+    /// <summary>
+    /// Constructs a protocol buffer which contains fields with all the same
+    /// numbers as allFieldsData except that each field is some other wire
+    /// type.
+    /// </summary>
+    private ByteString GetBizarroData() {
+      UnknownFieldSet.Builder bizarroFields = UnknownFieldSet.CreateBuilder();
+
+      UnknownField varintField = UnknownField.CreateBuilder().AddVarint(1).Build();
+      UnknownField fixed32Field = UnknownField.CreateBuilder().AddFixed32(1).Build();
+
+      foreach (KeyValuePair<int, UnknownField> entry in unknownFields.FieldDictionary) {
+        if (entry.Value.VarintList.Count == 0) {
+          // Original field is not a varint, so use a varint.
+          bizarroFields.AddField(entry.Key, varintField);
+        } else {
+          // Original field *is* a varint, so use something else.
+          bizarroFields.AddField(entry.Key, fixed32Field);
+        }
+      }
+
+      return bizarroFields.Build().ToByteString();
+    }
+
+    // =================================================================
+
+    [Test]
+    public void Varint() {
+      UnknownField field = GetField("optional_int32");
+      Assert.AreEqual(1, field.VarintList.Count);
+      Assert.AreEqual(allFields.OptionalInt32, (long) field.VarintList[0]);
+    }
+
+    [Test]
+    public void Fixed32() {
+      UnknownField field = GetField("optional_fixed32");
+      Assert.AreEqual(1, field.Fixed32List.Count);
+      Assert.AreEqual(allFields.OptionalFixed32, (int) field.Fixed32List[0]);
+    }
+
+    [Test]
+    public void Fixed64() {
+      UnknownField field = GetField("optional_fixed64");
+      Assert.AreEqual(1, field.Fixed64List.Count);
+      Assert.AreEqual(allFields.OptionalFixed64, (long) field.Fixed64List[0]);
+    }
+
+    [Test]
+    public void LengthDelimited() {
+      UnknownField field = GetField("optional_bytes");
+      Assert.AreEqual(1, field.LengthDelimitedList.Count);
+      Assert.AreEqual(allFields.OptionalBytes, field.LengthDelimitedList[0]);
+    }
+
+    [Test]
+    public void Group() {
+      FieldDescriptor nestedFieldDescriptor =
+        TestAllTypes.Types.OptionalGroup.Descriptor.FindDescriptor<FieldDescriptor>("a");
+      Assert.IsNotNull(nestedFieldDescriptor);
+
+      UnknownField field = GetField("optionalgroup");
+      Assert.AreEqual(1, field.GroupList.Count);
+
+      UnknownFieldSet group = field.GroupList[0];
+      Assert.AreEqual(1, group.FieldDictionary.Count);
+      Assert.IsTrue(group.HasField(nestedFieldDescriptor.FieldNumber));
+
+      UnknownField nestedField = group[nestedFieldDescriptor.FieldNumber];
+      Assert.AreEqual(1, nestedField.VarintList.Count);
+      Assert.AreEqual(allFields.OptionalGroup.A, (long) nestedField.VarintList[0]);
+    }
+
+    [Test]
+    public void Serialize() {
+      // Check that serializing the UnknownFieldSet produces the original data again.
+      ByteString data = emptyMessage.ToByteString();
+      Assert.AreEqual(allFieldsData, data);
+    }
+
+    [Test]
+    public void CopyFrom() {
+      TestEmptyMessage message =
+        TestEmptyMessage.CreateBuilder().MergeFrom(emptyMessage).Build();
+
+      Assert.AreEqual(emptyMessage.ToString(), message.ToString());
+    }
+
+    [Test]
+    public void MergeFrom() {
+      TestEmptyMessage source =
+        TestEmptyMessage.CreateBuilder()
+          .SetUnknownFields(
+            UnknownFieldSet.CreateBuilder()
+              .AddField(2,
+                UnknownField.CreateBuilder()
+                  .AddVarint(2).Build())
+              .AddField(3,
+                UnknownField.CreateBuilder()
+                  .AddVarint(4).Build())
+              .Build())
+          .Build();
+      TestEmptyMessage destination =
+        TestEmptyMessage.CreateBuilder()
+          .SetUnknownFields(
+            UnknownFieldSet.CreateBuilder()
+              .AddField(1,
+                UnknownField.CreateBuilder()
+                  .AddVarint(1).Build())
+              .AddField(3,
+                UnknownField.CreateBuilder()
+                  .AddVarint(3).Build())
+              .Build())
+          .MergeFrom(source)
+          .Build();
+
+      Assert.AreEqual(
+        "1: 1\n" +
+        "2: 2\n" +
+        "3: 3\n" +
+        "3: 4\n",
+        destination.ToString());
+    }
+
+    [Test]
+    public void Clear() {
+      UnknownFieldSet fields =
+        UnknownFieldSet.CreateBuilder().MergeFrom(unknownFields).Clear().Build();
+      Assert.AreEqual(0, fields.FieldDictionary.Count);
+    }
+
+    [Test]
+    public void ClearMessage() {
+      TestEmptyMessage message =
+        TestEmptyMessage.CreateBuilder().MergeFrom(emptyMessage).Clear().Build();
+      Assert.AreEqual(0, message.SerializedSize);
+    }
+
+    [Test]
+    public void ParseKnownAndUnknown() {
+      // Test mixing known and unknown fields when parsing.
+
+      UnknownFieldSet fields =
+        UnknownFieldSet.CreateBuilder(unknownFields)
+          .AddField(123456,
+            UnknownField.CreateBuilder().AddVarint(654321).Build())
+          .Build();
+
+      ByteString data = fields.ToByteString();
+      TestAllTypes destination = TestAllTypes.ParseFrom(data);
+
+      TestUtil.AssertAllFieldsSet(destination);
+      Assert.AreEqual(1, destination.UnknownFields.FieldDictionary.Count);
+
+      UnknownField field = destination.UnknownFields[123456];
+      Assert.AreEqual(1, field.VarintList.Count);
+      Assert.AreEqual(654321, (long) field.VarintList[0]);
+    }
+
+    [Test]
+    public void WrongTypeTreatedAsUnknown() {
+      // Test that fields of the wrong wire type are treated like unknown fields
+      // when parsing.
+
+      ByteString bizarroData = GetBizarroData();
+      TestAllTypes allTypesMessage = TestAllTypes.ParseFrom(bizarroData);
+      TestEmptyMessage emptyMessage = TestEmptyMessage.ParseFrom(bizarroData);
+
+      // All fields should have been interpreted as unknown, so the debug strings
+      // should be the same.
+      Assert.AreEqual(emptyMessage.ToString(), allTypesMessage.ToString());
+    }
+
+    [Test]
+    public void UnknownExtensions() {
+      // Make sure fields are properly parsed to the UnknownFieldSet even when
+      // they are declared as extension numbers.
+
+      TestEmptyMessageWithExtensions message =
+        TestEmptyMessageWithExtensions.ParseFrom(allFieldsData);
+
+      Assert.AreEqual(unknownFields.FieldDictionary.Count, 
+                   message.UnknownFields.FieldDictionary.Count);
+      Assert.AreEqual(allFieldsData, message.ToByteString());
+    }
+
+    [Test]
+    public void WrongExtensionTypeTreatedAsUnknown() {
+      // Test that fields of the wrong wire type are treated like unknown fields
+      // when parsing extensions.
+
+      ByteString bizarroData = GetBizarroData();
+      TestAllExtensions allExtensionsMessage = TestAllExtensions.ParseFrom(bizarroData);
+      TestEmptyMessage emptyMessage = TestEmptyMessage.ParseFrom(bizarroData);
+
+      // All fields should have been interpreted as unknown, so the debug strings
+      // should be the same.
+      Assert.AreEqual(emptyMessage.ToString(),
+                   allExtensionsMessage.ToString());
+    }
+
+    [Test]
+    public void ParseUnknownEnumValue() {
+      FieldDescriptor singularField = TestAllTypes.Descriptor.FindDescriptor<FieldDescriptor>("optional_nested_enum");
+      FieldDescriptor repeatedField = TestAllTypes.Descriptor.FindDescriptor<FieldDescriptor>("repeated_nested_enum");
+      Assert.IsNotNull(singularField);
+      Assert.IsNotNull(repeatedField);
+
+      ByteString data =
+        UnknownFieldSet.CreateBuilder()
+          .AddField(singularField.FieldNumber,
+            UnknownField.CreateBuilder()
+              .AddVarint((int) TestAllTypes.Types.NestedEnum.BAR)
+              .AddVarint(5)   // not valid
+              .Build())
+          .AddField(repeatedField.FieldNumber,
+            UnknownField.CreateBuilder()
+              .AddVarint((int) TestAllTypes.Types.NestedEnum.FOO)
+              .AddVarint(4)   // not valid
+              .AddVarint((int) TestAllTypes.Types.NestedEnum.BAZ)
+              .AddVarint(6)   // not valid
+              .Build())
+          .Build()
+          .ToByteString();
+
+      {
+        TestAllTypes message = TestAllTypes.ParseFrom(data);
+        Assert.AreEqual(TestAllTypes.Types.NestedEnum.BAR,
+                     message.OptionalNestedEnum);
+        TestUtil.AssertEqual(new [] {TestAllTypes.Types.NestedEnum.FOO, TestAllTypes.Types.NestedEnum.BAZ},
+            message.RepeatedNestedEnumList);
+        TestUtil.AssertEqual(new[] {5UL}, message.UnknownFields[singularField.FieldNumber].VarintList);
+        TestUtil.AssertEqual(new[] {4UL, 6UL}, message.UnknownFields[repeatedField.FieldNumber].VarintList);
+      }
+
+      {
+        TestAllExtensions message =
+          TestAllExtensions.ParseFrom(data, TestUtil.CreateExtensionRegistry());
+        Assert.AreEqual(TestAllTypes.Types.NestedEnum.BAR,
+          message.GetExtension(UnitTestProtoFile.OptionalNestedEnumExtension));
+        TestUtil.AssertEqual(new[] { TestAllTypes.Types.NestedEnum.FOO, TestAllTypes.Types.NestedEnum.BAZ },
+          message.GetExtension(UnitTestProtoFile.RepeatedNestedEnumExtension));
+        TestUtil.AssertEqual(new[] { 5UL }, message.UnknownFields[singularField.FieldNumber].VarintList);
+        TestUtil.AssertEqual(new[] { 4UL, 6UL }, message.UnknownFields[repeatedField.FieldNumber].VarintList);
+      }
+    }
+
+  }
+}