public async Task ReturnCorrectCurrentRatingValue()
{
const string testCocktailName = "TestCocktailName";
const string testCocktailRecipe = "TestCocktailRecipe";
const string testUserId1 = "userId1";
const string testUserId2 = "userId2";
const string testUserId3 = "userId3";
const int testCocktailId = 3;
const int testNewRatingInt = 5;
const int oldRatingsCount = 3;
const int testRating1 = 1;
const int testRating2 = 2;
const int testRating3 = 5;
var cocktailReview1 = new CocktailReviewEntity()
{
UserEntityId = testUserId1,
CocktailEntityId = testCocktailId,
Rating = testRating1
};
var cocktailReview2 = new CocktailReviewEntity()
{
UserEntityId = testUserId2,
CocktailEntityId = testCocktailId,
Rating = testRating2
};
var cocktailReview3 = new CocktailReviewEntity()
{
UserEntityId = testUserId3,
CocktailEntityId = testCocktailId,
Rating = testRating3
};
var options = TestUtilities.GetOptions(nameof(ReturnCorrectCurrentRatingValue));
var cocktail = new Cocktail()
{
Id = testCocktailId,
Name = testCocktailName,
Rating = 2.67,
Recipe = testCocktailRecipe,
};
using (var arrangeContext = new AppDBContext(options))
{
await arrangeContext.CocktailReviews.AddAsync(cocktailReview1);
await arrangeContext.CocktailReviews.AddAsync(cocktailReview2);
await arrangeContext.CocktailReviews.AddAsync(cocktailReview3);
await arrangeContext.SaveChangesAsync();
}
using (var actContext = new AppDBContext(options))
{
var sut = new CocktailService(actContext);
var rating = await sut.CalculateAverageRating(cocktail, testNewRatingInt);
var expectedRating = ((cocktail.Rating) + (testNewRatingInt - cocktail.Rating) / (oldRatingsCount + 1));
var expectedRatingRounded = Math.Round((double)expectedRating, 1);
Assert.AreEqual(expectedRatingRounded, rating);
}
}
public async Task ReturnCorrectCurrentRatingsCount()
{
const string testCocktailName = "TestCocktailName";
const string testCocktailRecipe = "TestCocktailRecipe";
const string testUserId1 = "userId1";
const string testUserId2 = "userId2";
const string testUserId3 = "userId3";
const int testCocktailId = 3;
const int testRating = 5;
const int testNewRatingInt = 99;
var cocktailReview1 = new CocktailReviewEntity()
{
UserEntityId = testUserId1,
CocktailEntityId = testCocktailId,
Rating = testRating
};
var cocktailReview2 = new CocktailReviewEntity()
{
UserEntityId = testUserId2,
CocktailEntityId = testCocktailId,
Rating = testRating
};
var cocktailReview3 = new CocktailReviewEntity()
{
UserEntityId = testUserId3,
CocktailEntityId = testCocktailId,
Rating = testRating
};
var options = TestUtilities.GetOptions(nameof(ReturnCorrectCurrentRatingsCount));
var cocktail = new Cocktail()
{
Id = testCocktailId,
Name = testCocktailName,
Recipe = testCocktailRecipe,
};
using (var arrangeContext = new AppDBContext(options))
{
await arrangeContext.CocktailReviews.AddAsync(cocktailReview1);
await arrangeContext.CocktailReviews.AddAsync(cocktailReview2);
await arrangeContext.CocktailReviews.AddAsync(cocktailReview3);
await arrangeContext.SaveChangesAsync();
}
using (var actContext = new AppDBContext(options))
{
var sut = new CocktailService(actContext);
await sut.CalculateAverageRating(cocktail, testNewRatingInt);
var currentRatingsCount = await actContext.CocktailReviews.Where(x => x.CocktailEntityId == cocktail.Id).CountAsync();
Assert.AreEqual(3, currentRatingsCount);
}
}
