Unit test for invalid part

Author: Jericho

Source/HttpMultipartParser.UnitTests/ParserScenarios/InvalidPart.cs

@@ -0,0 +1,73 @@
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace HttpMultipartParser.UnitTests.ParserScenarios
+{
+	public class InvalidPart
+	{
+		// For details see: https://github.com/Http-Multipart-Data-Parser/Http-Multipart-Data-Parser/issues/110
+		// This data is considered invalid because it contains nothing but empty lines
+		private static readonly string _testData = @"--KoZIhvcNAQcB
+
+--KoZIhvcNAQcB--";
+
+		private static readonly TestData _testCase = new TestData(
+			_testData,
+			Enumerable.Empty<ParameterPart>().ToList(),
+			Enumerable.Empty<FilePart>().ToList()
+		);
+
+		public InvalidPart()
+		{
+			foreach (var filePart in _testCase.ExpectedFileData)
+			{
+				filePart.Data.Position = 0;
+			}
+		}
+
+		[Fact]
+		public void Exception_is_thrown_when_attempting_to_parse()
+		{
+			// The default behavior is to throw an exception when the form contains an invalid section.
+			using (Stream stream = TestUtil.StringToStream(_testCase.Request, Encoding.UTF8))
+			{
+				Assert.Throws<MultipartParseException>(() => MultipartFormDataParser.Parse(stream));
+			}
+		}
+
+		[Fact]
+		public async Task Exception_is_thrown_when_attempting_to_parse_async()
+		{
+			// The default behavior is to throw an exception when the form contains an invalid section.
+			using (Stream stream = TestUtil.StringToStream(_testCase.Request, Encoding.UTF8))
+			{
+				await Assert.ThrowsAsync<MultipartParseException>(() => MultipartFormDataParser.ParseAsync(stream)).ConfigureAwait(false);
+			}
+		}
+
+		[Fact]
+		public void Invalid_part_is_ignored()
+		{
+			using (Stream stream = TestUtil.StringToStream(_testCase.Request, Encoding.UTF8))
+			{
+				var parser = MultipartFormDataParser.Parse(stream, ignoreInvalidParts: true);
+				Assert.Equal(0, parser.Files.Count);
+				Assert.Equal(0, parser.Parameters.Count);
+			}
+		}
+
+		[Fact]
+		public async Task Invalid_part_is_ignored_async()
+		{
+			using (Stream stream = TestUtil.StringToStream(_testCase.Request, Encoding.UTF8))
+			{
+				var parser = await MultipartFormDataParser.ParseAsync(stream, ignoreInvalidParts: true).ConfigureAwait(false);
+				Assert.Equal(0, parser.Files.Count);
+				Assert.Equal(0, parser.Parameters.Count);
+			}
+		}
+	}
+}