public void Specification_OrSpecification_ShouldFilterMovies()
{
// Arrange
var movieCount = MovieFactory.GetMixedMovies().Count(m =>
m.MpaaRating <= MpaaRating.PG || // For kids OR
m.Rating >= 4); // Best Rates
var kidSpec = new MovieForKidsSpecificationValidator();
var dirBest = new BestRatedFilmsSpecificationValidator();
var movieSpec = kidSpec.Or(dirBest);
// Act
var result = MovieFactory.GetMixedMovies().Where(movieSpec.IsSatisfiedBy);
// Assert
Assert.Equal(movieCount, result.Count());
}
public void Specification_NotSpecification_ShouldFilterMovies()
{
// Arrange
var movieCount = MovieFactory.GetMixedMovies().Count(m =>
m.MpaaRating > MpaaRating.PG && // Not for kids
m.Rating >= 4); // Best ratigs
var kidSpec = new MovieForKidsSpecificationValidator();
var dirBest = new BestRatedFilmsSpecificationValidator();
var movieSpec = dirBest.And(kidSpec.Not());
// Act
var result = MovieFactory.GetMixedMovies().Where(movieSpec.IsSatisfiedBy);
// Assert
Assert.Equal(movieCount, result.Count());
}
public void SpecValidation_Validate_ShouldReturnTrue()
{
// Arrange
var movie = MovieFactory.GetMixedMovies().FirstOrDefault(m =>
m.MpaaRating <= MpaaRating.PG && // For kids
m.ReleaseDate.Year == DateTime.Now.Year && // New Release
m.Rating >= 4); // Best ratings
var less1YearSpec = new LessThanOneYearSpecificationValidator();
var forKidsSpec = new MovieForKidsSpecificationValidator();
var bestRatedSpec = new BestRatedFilmsSpecificationValidator();
var newestGoodMoviesForKidsValidation = less1YearSpec.And(forKidsSpec).And(bestRatedSpec);
// Act
var result = newestGoodMoviesForKidsValidation.Validate(movie);
// Assert
Assert.True(result.IsValid);
}
public void SpecValidation_Validate_ShouldReturnFalseWithErrorMessages()
{
// Arrange
var movie = MovieFactory.GetMixedMovies().FirstOrDefault(m =>
m.MpaaRating <= MpaaRating.R && // Not For kids
m.ReleaseDate.Year < DateTime.Now.Year && // Old(?) Release
m.Rating < 4); // Bad ratings
var less1YearSpec = new LessThanOneYearSpecificationValidator();
var forKidsSpec = new MovieForKidsSpecificationValidator();
var bestRatedSpec = new BestRatedFilmsSpecificationValidator();
var newestGoodMoviesForKidsValidation = less1YearSpec.Or(forKidsSpec.Or(bestRatedSpec));
// Act
var result = newestGoodMoviesForKidsValidation.Validate(movie);
// Assert
Assert.False(result.IsValid);
Assert.Contains(result.Errors, e => e.ErrorMessage == "This movie was released over a year ago.");
Assert.Contains(result.Errors, e => e.ErrorMessage == "This film is not for children.");
Assert.Contains(result.Errors, e => e.ErrorMessage == "This film is not well rated.");
}