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#pragma warning disable CA1052 // Static holder types should be static
#pragma warning disable IDE0022 // Use expression body for method
#pragma warning disable IDE0040 // Add accessibility modifiers
#pragma warning disable IDE0161 // Convert to file-scoped namespace
#if XUNIT_NULLABLE
#nullable enable
#else
// In case this is source-imported with global nullable enabled but no XUNIT_NULLABLE
#pragma warning disable CS8603
#endif
using System;
using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;
namespace Xunit
{
/// <summary>
/// Contains various static methods that are used to verify that conditions are met during the
/// process of running tests.
/// </summary>
#if XUNIT_VISIBILITY_INTERNAL
internal
#else
public
#endif
partial class Assert
{
/// <summary>
/// Initializes a new instance of the <see cref="Assert"/> class.
/// </summary>
protected Assert() { }
/// <summary>Do not call this method.</summary>
[Obsolete("This is an override of Object.Equals(). Call Assert.Equal() instead.", true)]
[EditorBrowsable(EditorBrowsableState.Never)]
public static new bool Equals(
object a,
object b)
{
throw new InvalidOperationException("Assert.Equals should not be used");
}
/// <summary>Do not call this method.</summary>
[Obsolete("This is an override of Object.ReferenceEquals(). Call Assert.Same() instead.", true)]
[EditorBrowsable(EditorBrowsableState.Never)]
public static new bool ReferenceEquals(
object a,
object b)
{
throw new InvalidOperationException("Assert.ReferenceEquals should not be used");
}
/// <summary>
/// Safely perform <see cref="Type.GetGenericTypeDefinition"/>, returning <c>null</c> when the
/// type is not generic.
/// </summary>
/// <param name="type">The potentially generic type</param>
/// <returns>The generic type definition, when <paramref name="type"/> is generic; <c>null</c>, otherwise.</returns>
[return: DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.Interfaces)]
[UnconditionalSuppressMessage("Trimmability", "IL2073", Justification = "The interfaces on a generic type definition won't be trimmed if they're preserved for an instantation.")]
#if XUNIT_NULLABLE
static Type? SafeGetGenericTypeDefinition([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.Interfaces)] Type? type)
#else
static Type SafeGetGenericTypeDefinition([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.Interfaces)] Type type)
#endif
{
if (type == null)
return null;
#if NETSTANDARD2_0_OR_GREATER || NETCOREAPP2_0_OR_GREATER || NETFRAMEWORK
if (!type.IsGenericType)
return null;
#endif
// We need try/catch for target frameworks that don't support IsGenericType; notably, this
// would include .NET Core 1.x and .NET Standard 1.x, which are still supported for v2.
try
{
return type.GetGenericTypeDefinition();
}
catch (InvalidOperationException)
{
return null;
}
}
}
}
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