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using System;
using System.Globalization;
using System.Reflection;
using System.Threading;
using Xunit.Sdk;
namespace Timeline.Tests.Helpers
{
// Copied from https://github.com/xunit/samples.xunit/blob/master/UseCulture/UseCultureAttribute.cs
/// <summary>
/// Apply this attribute to your test method to replace the
/// <see cref="Thread.CurrentThread" /> <see cref="CultureInfo.CurrentCulture" /> and
/// <see cref="CultureInfo.CurrentUICulture" /> with another culture.
/// </summary>
[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public class UseCultureAttribute : BeforeAfterTestAttribute
{
readonly Lazy<CultureInfo> culture;
readonly Lazy<CultureInfo> uiCulture;
CultureInfo originalCulture;
CultureInfo originalUICulture;
/// <summary>
/// Replaces the culture and UI culture of the current thread with
/// <paramref name="culture" />
/// </summary>
/// <param name="culture">The name of the culture.</param>
/// <remarks>
/// <para>
/// This constructor overload uses <paramref name="culture" /> for both
/// <see cref="Culture" /> and <see cref="UICulture" />.
/// </para>
/// </remarks>
public UseCultureAttribute(string culture)
: this(culture, culture) { }
/// <summary>
/// Replaces the culture and UI culture of the current thread with
/// <paramref name="culture" /> and <paramref name="uiCulture" />
/// </summary>
/// <param name="culture">The name of the culture.</param>
/// <param name="uiCulture">The name of the UI culture.</param>
public UseCultureAttribute(string culture, string uiCulture)
{
this.culture = new Lazy<CultureInfo>(() => new CultureInfo(culture, false));
this.uiCulture = new Lazy<CultureInfo>(() => new CultureInfo(uiCulture, false));
}
/// <summary>
/// Gets the culture.
/// </summary>
public CultureInfo Culture { get { return culture.Value; } }
/// <summary>
/// Gets the UI culture.
/// </summary>
public CultureInfo UICulture { get { return uiCulture.Value; } }
/// <summary>
/// Stores the current <see cref="Thread.CurrentPrincipal" />
/// <see cref="CultureInfo.CurrentCulture" /> and <see cref="CultureInfo.CurrentUICulture" />
/// and replaces them with the new cultures defined in the constructor.
/// </summary>
/// <param name="methodUnderTest">The method under test</param>
public override void Before(MethodInfo methodUnderTest)
{
originalCulture = Thread.CurrentThread.CurrentCulture;
originalUICulture = Thread.CurrentThread.CurrentUICulture;
Thread.CurrentThread.CurrentCulture = Culture;
Thread.CurrentThread.CurrentUICulture = UICulture;
CultureInfo.CurrentCulture.ClearCachedData();
CultureInfo.CurrentUICulture.ClearCachedData();
}
/// <summary>
/// Restores the original <see cref="CultureInfo.CurrentCulture" /> and
/// <see cref="CultureInfo.CurrentUICulture" /> to <see cref="Thread.CurrentPrincipal" />
/// </summary>
/// <param name="methodUnderTest">The method under test</param>
public override void After(MethodInfo methodUnderTest)
{
Thread.CurrentThread.CurrentCulture = originalCulture;
Thread.CurrentThread.CurrentUICulture = originalUICulture;
CultureInfo.CurrentCulture.ClearCachedData();
CultureInfo.CurrentUICulture.ClearCachedData();
}
}
}
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