public void SetImportFeature_SetsTheImportFeature()
    {
        // Arrange
        var builder      = new DefaultRazorProjectEngineBuilder(RazorConfiguration.Default, Mock.Of <RazorProjectFileSystem>());
        var testFeature1 = Mock.Of <IImportProjectFeature>();
        var testFeature2 = Mock.Of <IImportProjectFeature>();

        builder.Features.Add(testFeature1);
        builder.Features.Add(testFeature2);
        var newFeature = Mock.Of <IImportProjectFeature>();

        // Act
        builder.SetImportFeature(newFeature);

        // Assert
        var feature = Assert.Single(builder.Features);

        Assert.Same(newFeature, feature);
    }