public async Task GetCategories_Uses_Cache_When_Data_Available()
{
var cacheService = new MockCacheService();
// cacheService.DataExistsAndIsValidAsyncDelegate = s => Task.FromResult(true);
var categories = new List<Category>
{
new Category{ Id = 1},
new Category{ Id = 2}
};
cacheService.GetDataDelegate = (string s) =>
{
if (s == "Categories-0-0")
return new ReadOnlyCollection<Category>(categories);
return new ReadOnlyCollection<Category>(null);
};
var productCatalogService = new MockProductCatalogService
{
GetSubcategoriesAsyncDelegate =
(parentId, maxProducts) =>
Task.FromResult<ICollection<Category>>(
new Collection<Category>(null))
};
var target = new ProductCatalogRepository(productCatalogService, cacheService);
var returnedCategories = (await target.GetRootCategoriesAsync(0)).ToList();
Assert.AreEqual(2, returnedCategories.Count);
Assert.AreEqual(1, returnedCategories[0].Id);
Assert.AreEqual(2, returnedCategories[1].Id);
}
public async Task GetCategories_Calls_Service_When_Cache_Miss()
{
var cacheService = new MockCacheService
{
GetDataDelegate = s => { throw new FileNotFoundException(); },
SaveDataAsyncDelegate =
(s, c) => Task.FromResult(new Uri("http://test.org"))
};
var productCatalogService = new MockProductCatalogService();
var categories = new List<Category> { new Category { Id = 1 }, new Category { Id = 2 } };
productCatalogService.GetSubcategoriesAsyncDelegate =
(parentId, maxProducts) =>
Task.FromResult((ICollection<Category>)(new Collection<Category>(categories)));
var target = new ProductCatalogRepository(productCatalogService, cacheService);
var returnedCategories = (await target.GetRootCategoriesAsync(0)).ToList();
Assert.AreEqual(2, returnedCategories.Count);
Assert.AreEqual(1, returnedCategories[0].Id);
Assert.AreEqual(2, returnedCategories[1].Id);
}
public async Task GetCategories_Saves_Data_To_Cache()
{
var cacheService = new MockCacheService
{
GetDataDelegate = s => { throw new FileNotFoundException(); },
SaveDataAsyncDelegate = (s, o) =>
{
var collection = (Collection<Category>)o;
Assert.AreEqual("Categories-0-0", s);
Assert.AreEqual(2, collection.Count);
Assert.AreEqual(1, collection[0].Id);
Assert.AreEqual(2, collection[1].Id);
return Task.FromResult(new Uri("http://test.org"));
}
};
var productCatalogService = new MockProductCatalogService();
var categories = new List<Category>
{
new Category{ Id = 1},
new Category{ Id = 2}
};
productCatalogService.GetSubcategoriesAsyncDelegate =
(parentId, maxProducts) => Task.FromResult<ICollection<Category>>(new Collection<Category>(categories));
var target = new ProductCatalogRepository(productCatalogService, cacheService);
await target.GetRootCategoriesAsync(0);
}