public void CalculateCorrectPercentageWhenNeverCorrect()
{
var expected = "Expected";
var classifier = new Mock <IImageClassifier <ImageObservation <int>, IEnumerable <int> > >();
classifier
.Setup(target => target.Classify(It.IsAny <IEnumerable <int> >()))
.Returns(expected);
var set = new[]
{
new ImageObservation <int>("blah", new[] { 1, 2, 3 }),
new ImageObservation <int>("other", new[] { 4, 5, 6 }),
new ImageObservation <int>("blah", new[] { 7, 8, 9 })
};
ImageClassifierEvaluator.CalculateCorrectPercentage(set, classifier.Object)
.Should().Be(0d, "because the classifier is never correct");
}
public void CalculateCorrectPercentageCorrectExactlyHalf()
{
var expected = "Expected";
var classifier = new Mock <IImageClassifier <ImageObservation <int>, IEnumerable <int> > >();
classifier
.Setup(target => target.Classify(It.IsAny <IEnumerable <int> >()))
.Returns(expected);
var set = new[]
{
new ImageObservation <int>(expected, new[] { 1, 2, 3 }),
new ImageObservation <int>("blah", new[] { 4, 5, 6 }),
new ImageObservation <int>(expected, new[] { 7, 8, 9 }),
new ImageObservation <int>("rando", new[] { 2, 3, 4 }),
};
ImageClassifierEvaluator.CalculateCorrectPercentage(set, classifier.Object)
.Should().Be(0.5d, "because the classifier is correct exactly half the time");
}
public void CalculateCorrectPercentageValidatesTheClassifier()
{
Action actionUnderTest = () => ImageClassifierEvaluator.CalculateCorrectPercentage(new ImageObservation <int> [0], null);
actionUnderTest.Should().Throw <ArgumentNullException>("because the classifier set is required");
}
public void CalculateCorrectPercentageValidatesTheValidationSet()
{
Action actionUnderTest = () => ImageClassifierEvaluator.CalculateCorrectPercentage(null, Mock.Of <IImageClassifier <ImageObservation <int>, IEnumerable <int> > >());
actionUnderTest.Should().Throw <ArgumentNullException>("because the validation set is required");
}
