[TestMethod] public void Construct()
{
// Arrange
var mockExtractor = new Mock <IFieldExtractor>();
mockExtractor.Setup(e => e.ExpectedSource).Returns(typeof(string));
mockExtractor.Setup(e => e.FieldType).Returns(typeof(int));
var conv = DataConverter.Identity <int>();
// Act
var step = new PrimitiveExtractionStep(mockExtractor.Object, conv);
// Assert
step.ExpectedSource.Should().Be(typeof(string));
}
[TestMethod] public void ExtractFromNull()
{
// Arrange
var result = 10;
var mockExtractor = new Mock <IFieldExtractor>();
mockExtractor.Setup(e => e.ExpectedSource).Returns(typeof(string));
mockExtractor.Setup(e => e.FieldType).Returns(typeof(int));
mockExtractor.Setup(e => e.Execute(It.IsAny <string>())).Returns(result);
var conv = DataConverter.Identity <int>();
var step = new PrimitiveExtractionStep(mockExtractor.Object, conv);
string?source = null;
// Act
var value = step.Execute(source);
// Assert
value.Should().BeEquivalentTo(new DBValue[] { DBValue.NULL });
}
[TestMethod] public void ExtractFromDerived()
{
// Arrange
var result = 10;
var mockExtractor = new Mock <IFieldExtractor>();
mockExtractor.Setup(e => e.ExpectedSource).Returns(typeof(Exception));
mockExtractor.Setup(e => e.FieldType).Returns(typeof(int));
mockExtractor.Setup(e => e.Execute(It.IsAny <Exception>())).Returns(result);
var conv = DataConverter.Identity <int>();
var step = new PrimitiveExtractionStep(mockExtractor.Object, conv);
var source = new NullReferenceException();
// Act
var value = step.Execute(source);
// Assert
mockExtractor.Verify(e => e.Execute(source), Times.Once);
value.Should().BeEquivalentTo(new DBValue[] { DBValue.Create(result) });
}
[TestMethod] public void ExtractWithNonIdentityConversion()
{
// Arrange
var result = 10;
var mockExtractor = new Mock <IFieldExtractor>();
mockExtractor.Setup(e => e.ExpectedSource).Returns(typeof(string));
mockExtractor.Setup(e => e.FieldType).Returns(typeof(int));
mockExtractor.Setup(e => e.Execute(It.IsAny <string>())).Returns(result);
var conv = DataConverter.Create <int, int>(i => i * 2);
var step = new PrimitiveExtractionStep(mockExtractor.Object, conv);
var source = "Detroit";
// Act
var value = step.Execute(source);
// Assert
mockExtractor.Verify(e => e.Execute(source), Times.Once);
value.Should().BeEquivalentTo(new DBValue[] { DBValue.Create(conv.Convert(result)) });
}