Created a new exception for JSON failures.

This is only thrown directly by JsonTokenizer, but surfaces from JsonParser as well. I've added doc comments to hopefully make everything clear.

The exception is actually thrown by the reader within JsonTokenizer, in anticipation of keeping track of the location within the document, but that change is not within this PR.

1 files changed, 2 insertions, 2 deletions

diff --git a/csharp/src/Google.Protobuf.Test/JsonTokenizerTest.cs b/csharp/src/Google.Protobuf.Test/JsonTokenizerTest.cs
index 868d9f75..1b3c8e9f 100644
--- a/csharp/src/Google.Protobuf.Test/JsonTokenizerTest.cs
+++ b/csharp/src/Google.Protobuf.Test/JsonTokenizerTest.cs
@@ -223,7 +223,7 @@ namespace Google.Protobuf
             {
                 Assert.IsNotNull(tokenizer.Next());
             }
-            Assert.Throws<InvalidProtocolBufferException>(() => tokenizer.Next());
+            Assert.Throws<InvalidJsonException>(() => tokenizer.Next());
         }
 
         [Test]
@@ -346,7 +346,7 @@ namespace Google.Protobuf
                 }
                 Assert.AreEqual(expectedTokens[i], actualToken);
             }
-            Assert.Throws<InvalidProtocolBufferException>(() => tokenizer.Next());
+            Assert.Throws<InvalidJsonException>(() => tokenizer.Next());
         }
     }
 }