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IncludeMemberByPredicateSelectionRule.cs
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IncludeMemberByPredicateSelectionRule.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using FluentAssertions.Common;
namespace FluentAssertions.Equivalency.Selection
{
/// <summary>
/// Selection rule that includes a particular member in the structural comparison.
/// </summary>
internal class IncludeMemberByPredicateSelectionRule : IMemberSelectionRule
{
private readonly Func<ISubjectInfo, bool> predicate;
private readonly string description;
public IncludeMemberByPredicateSelectionRule(Expression<Func<ISubjectInfo, bool>> predicate)
{
description = predicate.Body.ToString();
this.predicate = predicate.Compile();
}
public bool IncludesMembers => true;
public IEnumerable<SelectedMemberInfo> SelectMembers(IEnumerable<SelectedMemberInfo> selectedMembers, ISubjectInfo context, IEquivalencyAssertionOptions config)
{
var members = new List<SelectedMemberInfo>(selectedMembers);
foreach (SelectedMemberInfo selectedMemberInfo in context.RuntimeType.GetNonPrivateMembers())
{
if (predicate(new NestedSelectionContext(context, selectedMemberInfo)))
{
if (!members.Any(p => p.IsEquivalentTo(selectedMemberInfo)))
{
members.Add(selectedMemberInfo);
}
}
}
return members;
}
/// <filterpriority>2</filterpriority>
public override string ToString()
{
return "Include member when " + description;
}
}
}