84 lines
2.7 KiB
C#
84 lines
2.7 KiB
C#
// ****************************************************************
|
|
// Copyright 2007, Charlie Poole
|
|
// This is free software licensed under the NUnit license. You may
|
|
// obtain a copy of the license at http://nunit.org/?p=license&r=2.4
|
|
// ****************************************************************
|
|
|
|
using System;
|
|
using System.Collections;
|
|
using System.Reflection;
|
|
|
|
namespace NUnit.Framework.Constraints
|
|
{
|
|
/// <summary>
|
|
/// Summary description for PropertyConstraint.
|
|
/// </summary>
|
|
public class PropertyConstraint : PrefixConstraint
|
|
{
|
|
private string name;
|
|
private object propValue;
|
|
|
|
private bool propertyExists;
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="T:PropertyConstraint"/> class.
|
|
/// </summary>
|
|
/// <param name="name">The name.</param>
|
|
/// <param name="baseConstraint">The constraint to apply to the property.</param>
|
|
public PropertyConstraint( string name, Constraint baseConstraint )
|
|
: base( baseConstraint )
|
|
{
|
|
this.name = name;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Test whether the constraint is satisfied by a given value
|
|
/// </summary>
|
|
/// <param name="actual">The value to be tested</param>
|
|
/// <returns>True for success, false for failure</returns>
|
|
public override bool Matches(object actual)
|
|
{
|
|
this.actual = actual;
|
|
|
|
// TODO: Should be argument exception?
|
|
if ( actual == null ) return false;
|
|
|
|
PropertyInfo property = actual.GetType().GetProperty( name,
|
|
BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance );
|
|
this.propertyExists = property != null;
|
|
if ( !propertyExists ) return false;
|
|
|
|
if ( baseConstraint == null ) return true;
|
|
|
|
propValue = property.GetValue( actual, null );
|
|
return baseConstraint.Matches( propValue );
|
|
}
|
|
|
|
/// <summary>
|
|
/// Write the constraint description to a MessageWriter
|
|
/// </summary>
|
|
/// <param name="writer">The writer on which the description is displayed</param>
|
|
public override void WriteDescriptionTo(MessageWriter writer)
|
|
{
|
|
writer.WritePredicate( "Property \"" + name + "\"" );
|
|
if ( baseConstraint != null )
|
|
baseConstraint.WriteDescriptionTo( writer );
|
|
}
|
|
|
|
/// <summary>
|
|
/// Write the actual value for a failing constraint test to a
|
|
/// MessageWriter. The default implementation simply writes
|
|
/// the raw value of actual, leaving it to the writer to
|
|
/// perform any formatting.
|
|
/// </summary>
|
|
/// <param name="writer">The writer on which the actual value is displayed</param>
|
|
public override void WriteActualValueTo(MessageWriter writer)
|
|
{
|
|
if ( propertyExists )
|
|
writer.WriteActualValue( propValue );
|
|
else
|
|
writer.WriteActualValue( actual.GetType() );
|
|
}
|
|
}
|
|
}
|