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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using Microsoft.TestCommon;
using Xunit;
using Xunit.Extensions;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Net.Http.Formatting.Parsers
{
public class FormUrlEncodedParserTests
{
private const int MinMessageSize = 1;
private const int Iterations = 16;
internal static Collection<KeyValuePair<string, string>> CreateCollection()
{
return new Collection<KeyValuePair<string, string>>();
}
internal static FormUrlEncodedParser CreateParser(int maxMessageSize, out ICollection<KeyValuePair<string, string>> nameValuePairs)
{
nameValuePairs = CreateCollection();
return new FormUrlEncodedParser(nameValuePairs, maxMessageSize);
}
internal static byte[] CreateBuffer(params string[] nameValuePairs)
{
StringBuilder buffer = new StringBuilder();
bool first = true;
foreach (var h in nameValuePairs)
{
if (first)
{
first = false;
}
else
{
buffer.Append('&');
}
buffer.Append(h);
}
return Encoding.UTF8.GetBytes(buffer.ToString());
}
internal static ParserState ParseBufferInSteps(FormUrlEncodedParser parser, byte[] buffer, int readsize, out int totalBytesConsumed)
{
ParserState state = ParserState.Invalid;
totalBytesConsumed = 0;
while (totalBytesConsumed <= buffer.Length)
{
int size = Math.Min(buffer.Length - totalBytesConsumed, readsize);
byte[] parseBuffer = new byte[size];
Buffer.BlockCopy(buffer, totalBytesConsumed, parseBuffer, 0, size);
int bytesConsumed = 0;
state = parser.ParseBuffer(parseBuffer, parseBuffer.Length, ref bytesConsumed, totalBytesConsumed == buffer.Length - size);
totalBytesConsumed += bytesConsumed;
if (state != ParserState.NeedMoreData)
{
return state;
}
}
return state;
}
[Fact]
public void TypeIsCorrect()
{
Assert.Type.HasProperties<FormUrlEncodedParser>(TypeAssert.TypeProperties.IsClass);
}
[Fact]
public void FormUrlEncodedParserThrowsOnNull()
{
Assert.ThrowsArgumentNull(() => { new FormUrlEncodedParser(null, ParserData.MinHeaderSize); }, "nameValuePairs");
}
[Fact]
public void FormUrlEncodedParserThrowsOnInvalidSize()
{
Assert.ThrowsArgumentGreaterThanOrEqualTo(() => { new FormUrlEncodedParser(CreateCollection(), MinMessageSize - 1); }, "maxMessageSize", MinMessageSize.ToString(), MinMessageSize - 1);
FormUrlEncodedParser parser = new FormUrlEncodedParser(CreateCollection(), MinMessageSize);
Assert.NotNull(parser);
parser = new FormUrlEncodedParser(CreateCollection(), MinMessageSize + 1);
Assert.NotNull(parser);
}
[Fact]
public void ParseBufferThrowsOnNullBuffer()
{
ICollection<KeyValuePair<string, string>> collection;
FormUrlEncodedParser parser = CreateParser(128, out collection);
int bytesConsumed = 0;
Assert.ThrowsArgumentNull(() => { parser.ParseBuffer(null, 0, ref bytesConsumed, false); }, "buffer");
}
[Fact]
public void ParseBufferHandlesEmptyBuffer()
{
byte[] data = CreateBuffer();
ICollection<KeyValuePair<string, string>> collection;
FormUrlEncodedParser parser = CreateParser(MinMessageSize, out collection);
int bytesConsumed = 0;
ParserState state = parser.ParseBuffer(data, data.Length, ref bytesConsumed, true);
Assert.Equal(ParserState.Done, state);
Assert.Equal(data.Length, bytesConsumed);
Assert.Equal(0, collection.Count());
}
public static TheoryDataSet<string, string, string> UriQueryData
{
get
{
return UriQueryTestData.UriQueryData;
}
}
[Theory]
[InlineData("N", "N", "")]
[InlineData("%26", "&", "")]
[PropertyData("UriQueryData")]
public void ParseBufferCorrectly(string segment, string name, string value)
{
for (int index = 1; index < Iterations; index++)
{
List<string> segments = new List<string>();
for (int cnt = 0; cnt < index; cnt++)
{
segments.Add(segment);
}
byte[] data = CreateBuffer(segments.ToArray());
for (var cnt = 1; cnt <= data.Length; cnt++)
{
ICollection<KeyValuePair<string, string>> collection;
FormUrlEncodedParser parser = CreateParser(data.Length + 1, out collection);
Assert.NotNull(parser);
int totalBytesConsumed;
ParserState state = ParseBufferInSteps(parser, data, cnt, out totalBytesConsumed);
Assert.Equal(ParserState.Done, state);
Assert.Equal(data.Length, totalBytesConsumed);
Assert.Equal(index, collection.Count());
foreach (KeyValuePair<string, string> element in collection)
{
Assert.Equal(name, element.Key);
Assert.Equal(value, element.Value);
}
}
}
}
[Fact]
public void HeaderParserDataTooBig()
{
byte[] data = CreateBuffer("N=V");
ICollection<KeyValuePair<string, string>> collection;
FormUrlEncodedParser parser = CreateParser(MinMessageSize, out collection);
int bytesConsumed = 0;
ParserState state = parser.ParseBuffer(data, data.Length, ref bytesConsumed, true);
Assert.Equal(ParserState.DataTooBig, state);
Assert.Equal(MinMessageSize, bytesConsumed);
}
}
}
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