我有一个迭代行为的界面,我在Rhinomocks中模拟它时遇到了麻烦。示例接口和类是我的问题的一个非常简单的版本。
每次调用LineReader.Read()时,LineReader.CurrentLine()都应该返回一个不同的值 - 下一行。到目前为止,我还没有能够在模拟中重现这种行为。因此,它已经成为我的一个小业余爱好项目,我不时回到这里。我希望你能帮助我更进一步。
internal class LineReader : ILineReader
{
private readonly IList<string> _lines;
private int _countOfLines;
private int _place;
public LineReader(IList<string> lines)
{
_lines = lines;
_countOfLines = lines.Count;
_place = 0;
}
public string CurrentLine()
{
if (_place<_countOfLines)
{
return _lines[_place];
}
else
{
return null;
}
}
public bool ReadLine()
{
_place++;
return (_place < _countOfLines);
}
}
编辑添加了不完整的单元测试:
[Test]
public void Test()
{
IList<string> lineListForMock = new List<string>()
{
"A",
"B",
"C"
};
MockRepository mockRepository = new MockRepository();
ILineReader lineReader = mockRepository.Stub<ILineReader>();
//Setup the values here
mockRepository.ReplayAll();
bool read1 = lineReader.ReadLine();
Assert.That(read1, Is.True);
Assert.That(lineReader.CurrentLine(), Is.EqualTo("A"));
bool read2 = lineReader.ReadLine();
Assert.That(read2, Is.True);
Assert.That(lineReader.CurrentLine(), Is.EqualTo("B"));
bool read3 = lineReader.ReadLine();
Assert.That(read3, Is.True);
Assert.That(lineReader.CurrentLine(), Is.EqualTo("C"));
bool read1 = lineReader.ReadLine();
Assert.That(read1, Is.False);
}
答案 0 :(得分:4)
这就是你所需要的:
var enumerator = new List<string> { "A", "B", "C" }.GetEnumerator();
var lineReader = MockRepository.GenerateStub<ILineReader>();
lineReader.Stub(x => x.CurrentLine())
.Return("ignored")
.WhenCalled(x => x.ReturnValue = enumerator.Current);
lineReader.Stub(x => x.ReadLine())
.Return(false) // will be ignored
.WhenCalled(x => x.ReturnValue = enumerator.MoveNext());
答案 1 :(得分:2)
这似乎可以解决问题:
[TestFixture]
public sealed class TestIterativeRhinoReturn
{
private int _count;
private int _countOfLines;
private IList<string> _lines;
private string _currentLine;
[SetUp]
public void SetUp()
{
_count = -1;
_lines= new List<string>()
{
"A",
"B",
"C",
null
};
_countOfLines = _lines.Count;
_currentLine = null;
}
[Test]
public void Test()
{
MockRepository mockRepository = new MockRepository();
ILineReader lineReader = mockRepository.DynamicMock<ILineReader>();
lineReader.Stub(r => r.ReadLine()).Callback(new ReadLineDelegate(ReadRecord)).Return(_count < _countOfLines);
lineReader.Stub(r => r.CurrentLine()).Do(new CurrentStringDelegate(ReturnString)).Return(_currentLine);
mockRepository.ReplayAll();
bool read1 = lineReader.ReadLine();
Assert.That(read1, Is.True);
Assert.That(lineReader.CurrentLine(), Is.EqualTo("A"));
bool read2 = lineReader.ReadLine();
Assert.That(read2, Is.True);
Assert.That(lineReader.CurrentLine(), Is.EqualTo("B"));
bool read3 = lineReader.ReadLine();
Assert.That(read3, Is.True);
Assert.That(lineReader.CurrentLine(), Is.EqualTo("C"));
bool read4 = lineReader.ReadLine();
Assert.That(read4, Is.False);
Assert.That(lineReader.CurrentLine(), Is.Null);
}
public delegate bool ReadLineDelegate();
private bool ReadRecord()
{
_count++;
return (_lines[_count]!=null);
}
public delegate string CurrentStringDelegate();
private string ReturnString()
{
return _lines[_count];
}
注意线条:
lineReader.Stub(r => r.ReadLine()).Callback(new ReadLineDelegate(ReadRecord)).Return(_count < _countOfLines);
lineReader.Stub(r => r.CurrentLine()).Do(new CurrentStringDelegate(ReturnString)).Return(_currentLine);
和Delegate方法ReadRecord()和ReturnString()。现在,每次读取的返回值都会发生变化。
答案 2 :(得分:1)
我不知道我是否拥有最新版本的rhino-mocks但我的.Return方法没有采取委托/行动 - 这可能对你想做的事情有用。
但是,你似乎更接近于基于状态的测试,所以可能只是创建自己的模拟实现进行测试(或者存根,或假 - 你选择:)
然后你可以控制你所追求的确切值。