您可以创建使用现有EnumGenerator
的自定义Specimen Builder,但会跳过您不需要的值。
public class ExcludeUnknownEnumGenerator : ISpecimenBuilder
{
private readonly EnumGenerator _enumGenerator = new EnumGenerator();
public object Create(object request, ISpecimenContext context)
{
var enumType = request as Type;
if (enumType == null || !enumType.IsEnum)
{
return new NoSpecimen();
}
var namesEnumerator = Enum.GetNames(enumType).GetEnumerator();
while (namesEnumerator.MoveNext())
{
var specimen = _enumGenerator.Create(request, context);
if (specimen.ToString() != "Unknown" &&
specimen.ToString() != "Uninitialized")
{
return specimen;
}
}
throw new ObjectCreationException(
"AutoFixture was unable to create a value for " +
enumType.FullName +
" since it is an enum containing either no values or " +
"ignored values only ('Unknown' and 'Uninitialized'). " +
"Please add at least one valid value to the enum.");
}
}
public enum EnumWithUnknown
{
Known,
Unknown,
Wellknown,
Uninitialized
}
下面的代码显示enum
值而不Unknown
和Uninitialized
状态:在这种标本我为了不链接到任何特定类型enum
有意使用specimen.ToString()
方法
var fixture = new Fixture();
fixture.Customizations.Insert(0, new ExcludeUnknownEnumGenerator());
Console.Out.WriteLine("result = {0}", fixture.Create<EnumWithUnknown>());
Console.Out.WriteLine("result = {0}", fixture.Create<EnumWithUnknown>());
Console.Out.WriteLine("result = {0}", fixture.Create<EnumWithUnknown>());
Console.Out.WriteLine("result = {0}", fixture.Create<EnumWithUnknown>());
*** ConsoleOutput ***
result = Known
result = Wellknown
result = Known
result = Wellknown
岂不装饰现有的'EnumGenerator'会更容易吗? –
我在'Create'方法中调用'EnumGenerator'类。当你说'更容易'时,你的意思是缩小Create方法吗? –
请接受我的道歉;在我写这个评论之前,我没有完全阅读代码。 –