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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.Linq;
using System.Net.Http.Headers;
using Xunit;
using Xunit.Extensions;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Net.Http.Formatting
{
public class StringWithQualityHeaderValueComparerTests
{
public static IEnumerable<object[]> EqualValues
{
get
{
yield return new[] { "value", "value" };
yield return new[] { "value", "VALUE" };
yield return new[] { "value", "value;q=1" };
yield return new[] { "value", "value; q=1" };
yield return new[] { "value", "value;q=1.0" };
yield return new[] { "value", "value; q=1.0" };
yield return new[] { "value", "value; q=1.00000" };
yield return new[] { "value; q=0.5", "value; q=0.5" };
yield return new[] { "value; q=1.0", "value; q=1.0" };
yield return new[] { "*", "*" };
yield return new[] { "*", "*;q=1" };
yield return new[] { "*", "*; q=1" };
yield return new[] { "*", "*;q=1.0" };
yield return new[] { "*", "*; q=1.0" };
yield return new[] { "*; q=0.5", "*; q=0.5" };
yield return new[] { "*; q=1.0", "*; q=1.0" };
yield return new[] { "value1", "value2" };
yield return new[] { "value1", "value2;q=1" };
yield return new[] { "value1", "value2; q=1" };
yield return new[] { "value1", "value2;q=1.0" };
yield return new[] { "value1", "value2; q=1.0" };
}
}
public static IEnumerable<object[]> NonEqualValues
{
get
{
yield return new[] { "value; q=0.5", "value; q=1.0" };
yield return new[] { "value1; q=0.5", "value2; q=1.0" };
yield return new[] { "*", "value1" };
yield return new[] { "*;q=1", "value1" };
yield return new[] { "*; q=1", "value1" };
yield return new[] { "*;q=1.0", "value1" };
yield return new[] { "*; q=1.0", "value1" };
yield return new[] { "*; q=0.5", "value1; q=0.5" };
yield return new[] { "*; q=1.0", "value1; q=1.0" };
}
}
public static IEnumerable<object[]> BeforeAfterSortedValues
{
get
{
yield return new[]
{
new List<string>
{
"text",
"text;q=1.0",
"text",
"text;q=0",
"*;q=0.8",
"*;q=1",
"text;q=0.8",
"*;q=0.6",
"text;q=1.0",
"*;q=0.4",
"text;q=0.6",
},
new List<string>
{
"text",
"text;q=1.0",
"text",
"text;q=1.0",
"*;q=1",
"text;q=0.8",
"*;q=0.8",
"text;q=0.6",
"*;q=0.6",
"*;q=0.4",
"text;q=0",
},
};
}
}
[Fact]
public void StaticComparerReturnsSameInstance()
{
StringWithQualityHeaderValueComparer comparer1 = StringWithQualityHeaderValueComparer.QualityComparer;
StringWithQualityHeaderValueComparer comparer2 = StringWithQualityHeaderValueComparer.QualityComparer;
Assert.NotNull(comparer1);
Assert.Same(comparer1, comparer2);
}
[Theory]
[PropertyData("EqualValues")]
public void ComparerReturnsZeroForEqualValues(string stringWithQuality1, string stringWithQuality2)
{
// Arrange
StringWithQualityHeaderValueComparer comparer = StringWithQualityHeaderValueComparer.QualityComparer;
// Act
StringWithQualityHeaderValue stringWithQualityHeaderValue1 = StringWithQualityHeaderValue.Parse(stringWithQuality1);
StringWithQualityHeaderValue stringWithQualityHeaderValue2 = StringWithQualityHeaderValue.Parse(stringWithQuality2);
// Assert
Assert.Equal(0, comparer.Compare(stringWithQualityHeaderValue1, stringWithQualityHeaderValue2));
Assert.Equal(0, comparer.Compare(stringWithQualityHeaderValue2, stringWithQualityHeaderValue1));
}
[Theory]
[PropertyData("NonEqualValues")]
public void ComparerReturnsNonZeroForNonEqualValues(string stringWithQuality1, string stringWithQuality2)
{
// Arrange
StringWithQualityHeaderValueComparer comparer = StringWithQualityHeaderValueComparer.QualityComparer;
// Act
StringWithQualityHeaderValue stringWithQualityHeaderValue1 = StringWithQualityHeaderValue.Parse(stringWithQuality1);
StringWithQualityHeaderValue stringWithQualityHeaderValue2 = StringWithQualityHeaderValue.Parse(stringWithQuality2);
// Assert
Assert.Equal(-1, comparer.Compare(stringWithQualityHeaderValue1, stringWithQualityHeaderValue2));
Assert.Equal(1, comparer.Compare(stringWithQualityHeaderValue2, stringWithQualityHeaderValue1));
}
[Theory]
[PropertyData("BeforeAfterSortedValues")]
public void ComparerSortsListCorrectly(List<string> unsorted, List<string> expectedSorted)
{
// Arrange
IEnumerable<StringWithQualityHeaderValue> unsortedValues =
unsorted.Select(u => StringWithQualityHeaderValue.Parse(u));
IEnumerable<StringWithQualityHeaderValue> expectedSortedValues =
expectedSorted.Select(u => StringWithQualityHeaderValue.Parse(u));
// Act
IEnumerable<StringWithQualityHeaderValue> actualSorted = unsortedValues.OrderByDescending(m => m, StringWithQualityHeaderValueComparer.QualityComparer);
// Assert
Assert.True(expectedSortedValues.SequenceEqual(actualSorted));
}
}
}
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