有没有人有一个很好的方法来测试他们的UserTypes？
举例来说，我的模型中有一个名为DateRange的对象，它有一个DatePoint start和DatePoint结束。除了为两个DateTime提供范围类型操作之外，这些对象还允许我调整手头任务的精度（即日，小时，分钟等）。当存储到我正在处理的应用程序的数据库时，我只需要将开始和结束存储为DateTime，不允许空值。我想不出如何在没有UserType的情况下映射它，所以我有：
/// <summary>User type to deal with <see cref="DateRange"/> persistence for time sheet tracking.</summary>
public class TimePeriodType : IUserType
{
public SqlType[] SqlTypes {
get {
var types = new SqlType[2];
types[0] = new SqlType(DbType.DateTime);
types[1] = new SqlType(DbType.DateTime);
return types;
}
}
public Type ReturnedType
{
get { return typeof(DateRange); }
}
/// <summary>Just return <see cref="DateRange.Equals(object)"/></summary>
public new bool Equals(object x, object y)
{
return x != null && x.Equals(y);
}
/// <summary>Just return <see cref="DateRange.GetHashCode"/></summary>
public int GetHashCode(object x)
{
return x.GetHashCode();
}
public object NullSafeGet(IDataReader rs, string[] names, object owner)
{
var start = (DateTime)NHibernateUtil.DateTime.NullSafeGet(rs, names[0]);
var end = (DateTime)NHibernateUtil.DateTime.NullSafeGet(rs, names[1]);
return new DateRange(start, end, TimeSlice.Minute);
}
public void NullSafeSet(IDbCommand cmd, object value, int index) {
Check.RequireNotNull<DateRange>(value);
Check.RequireArgType<DateRange>(value);
var dateRange = ((DateRange)value);
NHibernateUtil.DateTime.NullSafeSet(cmd, dateRange.Start, index);
NHibernateUtil.DateTime.NullSafeSet(cmd, dateRange.End, index);
}
public object DeepCopy(object value) {
Check.RequireNotNull<DateRange>(value);
Check.RequireArgType<DateRange>(value);
var dateRange = ((DateRange) value);
return new DateRange(dateRange.Start, dateRange.End);
}
public bool IsMutable
{
get { return false; }
}
public object Replace(object original, object target, object owner) {
//because it is immutable so we can just return it as is
return original;
}
public object Assemble(object cached, object owner) {
//Used for caching, as it is immutable we can just return it as is
return cached;
}
public object Disassemble(object value) {
//Used for caching, as it is immutable we can just return it as is
return value;
}
}
}
现在我正在寻找一种证明它有效的方法。提前谢谢！
干杯， Berryl
答案 0 :(得分：9)
我为System.Drawing.Color创建了一个用户类型，这是我用MSTest和Moq对它进行单元测试的方式。
ColorUserType.cs：
public class ColorUserType : IUserType
{
public object Assemble( object cached, object owner )
{
return cached;
}
public object DeepCopy( object value )
{
return value;
}
public object Disassemble( object value )
{
return value;
}
public new bool Equals( object x, object y )
{
if(ReferenceEquals(x, y ) )
{
return true;
}
if( x == null || y == null )
{
return false;
}
return x.Equals( y );
}
public int GetHashCode( object x )
{
return x == null ? typeof( Color ).GetHashCode() + 473 : x.GetHashCode();
}
public bool IsMutable
{
get
{
return true;
}
}
public object NullSafeGet( IDataReader rs, string[] names, object owner )
{
var obj = NHibernateUtil.String.NullSafeGet( rs, names[0] );
if( obj == null )
{
return null;
}
return ColorTranslator.FromHtml( (string)obj );
}
public void NullSafeSet( IDbCommand cmd, object value, int index )
{
if( value == null )
{
( (IDataParameter)cmd.Parameters[index] ).Value = DBNull.Value;
}
else
{
( (IDataParameter)cmd.Parameters[index] ).Value = ColorTranslator.ToHtml( (Color)value );
}
}
public object Replace( object original, object target, object owner )
{
return original;
}
public Type ReturnedType
{
get
{
return typeof( Color );
}
}
public SqlType[] SqlTypes
{
get
{
return new[] { new SqlType( DbType.StringFixedLength ) };
}
}
}
ColorUserTypeTests.cs
[TestClass]
public class ColorUserTypeTests
{
public TestContext TestContext { get; set; }
[TestMethod]
public void AssembleTest()
{
var color = Color.Azure;
var userType = new ColorUserType();
var val = userType.Assemble( color, null );
Assert.AreEqual( color, val );
}
[TestMethod]
public void DeepCopyTest()
{
var color = Color.Azure;
var userType = new ColorUserType();
var val = userType.DeepCopy( color );
Assert.AreEqual( color, val );
}
[TestMethod]
public void DissasembleTest()
{
var color = Color.Azure;
var userType = new ColorUserType();
var val = userType.Disassemble( color );
Assert.AreEqual( color, val );
}
[TestMethod]
public void EqualsTest()
{
var color1 = Color.Azure;
var color2 = Color.Bisque;
var color3 = Color.Azure;
var userType = new ColorUserType();
var obj1 = (object)color1;
var obj2 = obj1;
Assert.IsFalse( userType.Equals( color1, color2 ) );
Assert.IsTrue( userType.Equals( color1, color1 ) );
Assert.IsTrue( userType.Equals( color1, color3 ) );
Assert.IsFalse( userType.Equals( color1, null ) );
Assert.IsFalse( userType.Equals( null, color1 ) );
Assert.IsTrue( userType.Equals( null, null ) );
Assert.IsTrue( userType.Equals( obj1, obj2 ) );
}
[TestMethod]
public void GetHashCodeTest()
{
var color = Color.Azure;
var userType = new ColorUserType();
Assert.AreEqual( color.GetHashCode(), userType.GetHashCode( color ) );
Assert.AreEqual( typeof( Color ).GetHashCode() + 473, userType.GetHashCode( null ) );
}
[TestMethod]
public void IsMutableTest()
{
var userType = new ColorUserType();
Assert.IsTrue( userType.IsMutable );
}
[TestMethod]
public void NullSafeGetTest()
{
var dataReaderMock = new Mock();
dataReaderMock.Setup( m => m.GetOrdinal( "white" ) ).Returns( 0 );
dataReaderMock.Setup( m => m.IsDBNull( 0 ) ).Returns( false );
dataReaderMock.Setup( m => m[0] ).Returns( "#ffffff" );
var userType = new ColorUserType();
var val = (Color)userType.NullSafeGet( dataReaderMock.Object, new[] { "white" }, null );
Assert.AreEqual( "ffffffff", val.Name, "The wrong color was returned." );
dataReaderMock.Setup( m => m.IsDBNull( It.IsAny() ) ).Returns( true );
Assert.IsNull( userType.NullSafeGet( dataReaderMock.Object, new[] { "black" }, null ), "The color was not null." );
dataReaderMock.VerifyAll();
}
[TestMethod]
public void NullSafeSetTest()
{
const string color = "#ffffff";
const int index = 0;
var mockFactory = new MockFactory( MockBehavior.Default );
var parameterMock = mockFactory.Create();
parameterMock.SetupProperty( p => p.Value, string.Empty );
var parameterCollectionMock = mockFactory.Create();
parameterCollectionMock.Setup( m => m[0] ).Returns( parameterMock.Object );
var commandMock = mockFactory.Create();
commandMock.Setup( m => m.Parameters ).Returns( parameterCollectionMock.Object );
var userType = new ColorUserType();
userType.NullSafeSet( commandMock.Object, ColorTranslator.FromHtml( color ), index );
Assert.AreEqual( 0, string.Compare( (string)( (IDataParameter)commandMock.Object.Parameters[0] ).Value, color, true ) );
userType.NullSafeSet( commandMock.Object, null, index );
Assert.AreEqual( DBNull.Value, ( (IDataParameter)commandMock.Object.Parameters[0] ).Value );
mockFactory.VerifyAll();
}
[TestMethod]
public void ReplaceTest()
{
var color = Color.Azure;
var userType = new ColorUserType();
Assert.AreEqual( color, userType.Replace( color, null, null ) );
}
[TestMethod]
public void ReturnedTypeTest()
{
var userType = new ColorUserType();
Assert.AreEqual( typeof( Color ), userType.ReturnedType );
}
[TestMethod]
public void SqlTypesTest()
{
var userType = new ColorUserType();
Assert.AreEqual( 1, userType.SqlTypes.Length );
Assert.AreEqual( new SqlType( DbType.StringFixedLength ), userType.SqlTypes[0] );
}
}
答案 1 :(得分：0)
我原本以为我可以在这里模拟/伪造一些依赖项，但最终确定最佳方法是使用数据库。
我一路上学到了一些东西：
1）学习NHibernate技术以获得一套专用工具（包括快速配置数据库和测试夹具的方法）时，值得付出努力（实际上，你需要的其他所有类型的敏捷工具）还有一个专门的测试实验室，你没有情感投资。
2）模拟不适合你不拥有的接口，比如IDataReader。
干杯