public static T Column <T>(this FakeDataReader reader, int i)
{
if (reader is null)
{
throw new ArgumentException(nameof(reader));
}
return(_extractor.Extract <T>(reader.GetValue(i)));
}
public void Extract_Int32_Throws_On_DBNull()
{
// Arrange
// Act
TestDelegate test = () => _extractor.Extract <int>(DBNull.Value);
// Assert
Assert.That(test, Throws.TypeOf <InvalidCastException>());
}
public void Extract_Int32_Unboxes(object input)
{
// Arrange
// Act
int result = _extractor.Extract <int>(input);
// Assert
Assert.That(result, Is.EqualTo(input));
}
public void Extract_Int32_Unwraps(int input)
{
// Arrange
WrappedInt32 value = new WrappedInt32(input);
// Act
int result = _extractor.Extract <int>(value);
// Assert
Assert.That(result, Is.EqualTo(input));
}
public void Unbox_DataReader_Columns_with_Custom_Handlers(object input)
{
// Arrange
ValueExtractor extractor = ValueExtractor.Create(config =>
{
config.UseHandler <bool>(
(obj, ctx) =>
{
if (obj is bool b)
{
ctx.Result = b;
return;
}
if (obj is string s)
{
ctx.Result = s == "Y";
return;
}
});
});
// Act
bool result = extractor.Extract <bool>(input);
// Assert
}
public void ContextualHandler_Throws_InvalidCastException_If_No_Result_Assigned()
{
// Arrange
ValueExtractor extractor = ValueExtractor.Create(config =>
{
config.UseHandler <string>(
(obj, ctx) =>
{
});
});
// Act
TestDelegate test = () => extractor.Extract <string>("");
// Assert
Assert.That(test, Throws.TypeOf <InvalidCastException>());
}
internal virtual object Extract(object o)
{
return(ValueExtractor.Extract(o));
}