public void Basic()
{
FeatureBuilder builder = new FeatureBuilder();
builder.AddFeature("a", "b");
builder.Build().ShouldDeepEqual(new Feature(new[] { "a", "b" }));
builder.AddFeature("c");
builder.Build().ShouldDeepEqual(new Feature(new[] { "a", "b", "c" }));
builder.RemoveFeature("c");
builder.Build().ShouldDeepEqual(new Feature(new[] { "a", "b" }));
Assert.ThrowsException <Exception>(() => builder.AddFeature($"a{Feature.FeatureSeperator}b"));
}