IsEqual.cs :  » Testing » MockObjects » DotNetMock » Dynamic » Predicates » C# / CSharp Open Source

#region License
// Copyright (c) 2004 Griffin Caprio & Choy Rim. All rights reserved.
#endregion
#region Imports
using System;

using DotNetMock.Util;
#endregion

namespace DotNetMock.Dynamic.Predicates{
  /// <summary>
  /// <see cref="IPredicate"/> comparing two values
  /// </summary>
  public class IsEqual : AbstractPredicate 
  {
    private object _compare;
    /// <summary>
    /// Default Constructor
    /// </summary>
    /// <param name="compare">value to compare against</param>
    public IsEqual(object compare)
    {
      _compare = compare;
    }
    /// <summary>
    /// Evaluates input value against original value for equality
    /// </summary>
    /// <param name="inputValue">input value</param>
    /// <returns>True if input value equals original value, false otherwise.</returns>
    public override bool Eval(object inputValue)
    {
      if ( ( inputValue == null ) & ( _compare != null ) ) 
      {
        return false;
      }
      if ( ( inputValue != null ) & ( _compare == null ) ) 
      {
        return false;
      }
      if ( ( inputValue == null ) & ( _compare == null ) ) 
      {
        return true;
      }
      if ( _compare.GetType().IsArray ) 
      {
        if ( ! inputValue.GetType().IsArray ) 
        {
          return false;
        }
        object[] currentArray = (object[]) inputValue;
        object[] compareArray = (object[]) _compare;
        if ( compareArray.Length != currentArray.Length ) 
        {
          return false;
        }
        for ( int counter = 0; counter < compareArray.Length; counter++ ) 
        {
          if ( !compareArray[ counter ].Equals( currentArray[ counter] ) )
          {
            return false;
          }
        }
        return true;
      } 
      else 
      {
        return _compare.Equals(inputValue);
      }
    }
    /// <summary>
    /// Text representation of what is evaluated by the
    /// <see cref="Eval"/> method.
    /// </summary>
    public override string ExpressionAsText(string name)
    {
      return String.Format(
        "{0} equals {1}",
        name,
        StringUtils.FormatScalar(_compare)
        );
    }

  }
}