CSHARP-1625: Added TryParse to BsonDocument.

Author: rstam

src/MongoDB.Bson/ObjectModel/BsonDocument.cs

@@ -386,6 +386,26 @@ public static BsonDocument Parse(string json)
  }
  }
 
+ /// <summary>
+ /// Tries to parse a JSON string and returns a value indicating whether it succeeded or failed.
+ /// </summary>
+ /// <param name="s">The JSON string.</param>
+ /// <param name="result">The result.</param>
+ /// <returns>Whether it succeeded or failed.</returns>
+ public static bool TryParse(string s, out BsonDocument result)
+ {
+ try
+ {
+ result = Parse(s);
+ return true;
+ }
+ catch
+ {
+ result = null;
+ return false;
+ }
+ }
+
  // public methods
  /// <summary>
  /// Adds an element to the document.

tests/MongoDB.Bson.Tests/ObjectModel/BsonDocumentTests.cs

@@ -1373,6 +1373,30 @@ public void TestTryGetValue()
  Assert.Equal(1, value.AsInt32);
  }
 
+ [Fact]
+ public void TestTryParse_success()
+ {
+ var s = "{ x : 1 }";
+ BsonDocument result;
+
+ var success = BsonDocument.TryParse(s, out result);
+
+ success.Should().BeTrue();
+ result.Should().Be(new BsonDocument("x", 1));
+ }
+
+ [Fact]
+ public void TestTryParse_failure()
+ {
+ var s = "{ ...";
+ BsonDocument result;
+
+ var success = BsonDocument.TryParse(s, out result);
+
+ success.Should().BeFalse();
+ result.Should().BeNull();
+ }
+
  private void AssertAreEqual(string expected, byte[] actual)
  {
  StringBuilder sb = new StringBuilder();