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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using System.Linq;
using Xunit;
namespace Microsoft.Net.Http.Headers;
public class RangeHeaderValueTest
{
[Fact]
public void Ctor_InvalidRange_Throw()
{
Assert.Throws<ArgumentOutOfRangeException>(() => new RangeHeaderValue(5, 2));
}
[Fact]
public void Unit_GetAndSetValidAndInvalidValues_MatchExpectation()
{
var range = new RangeHeaderValue();
range.Unit = "myunit";
Assert.Equal("myunit", range.Unit);
Assert.Throws<ArgumentException>(() => range.Unit = null);
Assert.Throws<ArgumentException>(() => range.Unit = "");
Assert.Throws<FormatException>(() => range.Unit = " x");
Assert.Throws<FormatException>(() => range.Unit = "x ");
Assert.Throws<FormatException>(() => range.Unit = "x y");
}
[Fact]
public void ToString_UseDifferentRanges_AllSerializedCorrectly()
{
var range = new RangeHeaderValue();
range.Unit = "myunit";
range.Ranges.Add(new RangeItemHeaderValue(1, 3));
Assert.Equal("myunit=1-3", range.ToString());
range.Ranges.Add(new RangeItemHeaderValue(5, null));
range.Ranges.Add(new RangeItemHeaderValue(null, 17));
Assert.Equal("myunit=1-3, 5-, -17", range.ToString());
}
[Fact]
public void GetHashCode_UseSameAndDifferentRanges_SameOrDifferentHashCodes()
{
var range1 = new RangeHeaderValue(1, 2);
var range2 = new RangeHeaderValue(1, 2);
range2.Unit = "BYTES";
var range3 = new RangeHeaderValue(1, null);
var range4 = new RangeHeaderValue(null, 2);
var range5 = new RangeHeaderValue();
range5.Ranges.Add(new RangeItemHeaderValue(1, 2));
range5.Ranges.Add(new RangeItemHeaderValue(3, 4));
var range6 = new RangeHeaderValue();
range6.Ranges.Add(new RangeItemHeaderValue(3, 4)); // reverse order of range5
range6.Ranges.Add(new RangeItemHeaderValue(1, 2));
Assert.Equal(range1.GetHashCode(), range2.GetHashCode());
Assert.NotEqual(range1.GetHashCode(), range3.GetHashCode());
Assert.NotEqual(range1.GetHashCode(), range4.GetHashCode());
Assert.NotEqual(range1.GetHashCode(), range5.GetHashCode());
Assert.Equal(range5.GetHashCode(), range6.GetHashCode());
}
[Fact]
public void Equals_UseSameAndDifferentRanges_EqualOrNotEqualNoExceptions()
{
var range1 = new RangeHeaderValue(1, 2);
var range2 = new RangeHeaderValue(1, 2);
range2.Unit = "BYTES";
var range3 = new RangeHeaderValue(1, null);
var range4 = new RangeHeaderValue(null, 2);
var range5 = new RangeHeaderValue();
range5.Ranges.Add(new RangeItemHeaderValue(1, 2));
range5.Ranges.Add(new RangeItemHeaderValue(3, 4));
var range6 = new RangeHeaderValue();
range6.Ranges.Add(new RangeItemHeaderValue(3, 4)); // reverse order of range5
range6.Ranges.Add(new RangeItemHeaderValue(1, 2));
var range7 = new RangeHeaderValue(1, 2);
range7.Unit = "other";
Assert.False(range1.Equals(null), "bytes=1-2 vs. <null>");
Assert.True(range1!.Equals(range2), "bytes=1-2 vs. BYTES=1-2");
Assert.False(range1.Equals(range3), "bytes=1-2 vs. bytes=1-");
Assert.False(range1.Equals(range4), "bytes=1-2 vs. bytes=-2");
Assert.False(range1.Equals(range5), "bytes=1-2 vs. bytes=1-2,3-4");
Assert.True(range5.Equals(range6), "bytes=1-2,3-4 vs. bytes=3-4,1-2");
Assert.False(range1.Equals(range7), "bytes=1-2 vs. other=1-2");
}
[Fact]
public void Parse_SetOfValidValueStrings_ParsedCorrectly()
{
CheckValidParse(" bytes=1-2 ", new RangeHeaderValue(1, 2));
var expected = new RangeHeaderValue();
expected.Unit = "custom";
expected.Ranges.Add(new RangeItemHeaderValue(null, 5));
expected.Ranges.Add(new RangeItemHeaderValue(1, 4));
CheckValidParse("custom = - 5 , 1 - 4 ,,", expected);
expected = new RangeHeaderValue();
expected.Unit = "custom";
expected.Ranges.Add(new RangeItemHeaderValue(1, 2));
CheckValidParse(" custom = 1 - 2", expected);
expected = new RangeHeaderValue();
expected.Ranges.Add(new RangeItemHeaderValue(1, 2));
expected.Ranges.Add(new RangeItemHeaderValue(3, null));
expected.Ranges.Add(new RangeItemHeaderValue(null, 4));
CheckValidParse("bytes =1-2,,3-, , ,-4,,", expected);
}
[Fact]
public void Parse_SetOfInvalidValueStrings_Throws()
{
CheckInvalidParse("bytes=1-2x"); // only delimiter ',' allowed after last range
CheckInvalidParse("x bytes=1-2");
CheckInvalidParse("bytes=1-2.4");
CheckInvalidParse(null);
CheckInvalidParse(string.Empty);
CheckInvalidParse("bytes=1");
CheckInvalidParse("bytes=");
CheckInvalidParse("bytes");
CheckInvalidParse("bytes 1-2");
CheckInvalidParse("bytes= ,,, , ,,");
}
[Fact]
public void TryParse_SetOfValidValueStrings_ParsedCorrectly()
{
CheckValidTryParse(" bytes=1-2 ", new RangeHeaderValue(1, 2));
var expected = new RangeHeaderValue();
expected.Unit = "custom";
expected.Ranges.Add(new RangeItemHeaderValue(null, 5));
expected.Ranges.Add(new RangeItemHeaderValue(1, 4));
CheckValidTryParse("custom = - 5 , 1 - 4 ,,", expected);
}
[Fact]
public void TryParse_SetOfInvalidValueStrings_ReturnsFalse()
{
CheckInvalidTryParse("bytes=1-2x"); // only delimiter ',' allowed after last range
CheckInvalidTryParse("x bytes=1-2");
CheckInvalidTryParse("bytes=1-2.4");
CheckInvalidTryParse(null);
CheckInvalidTryParse(string.Empty);
}
#region Helper methods
private void CheckValidParse(string? input, RangeHeaderValue expectedResult)
{
var result = RangeHeaderValue.Parse(input);
Assert.Equal(expectedResult, result);
}
private void CheckInvalidParse(string? input)
{
Assert.Throws<FormatException>(() => RangeHeaderValue.Parse(input));
}
private void CheckValidTryParse(string? input, RangeHeaderValue expectedResult)
{
Assert.True(RangeHeaderValue.TryParse(input, out var result));
Assert.Equal(expectedResult, result);
}
private void CheckInvalidTryParse(string? input)
{
Assert.False(RangeHeaderValue.TryParse(input, out var result));
Assert.Null(result);
}
#endregion
}
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