public async Task GetAllByManufacturerAsync_WithNullManufacturerId_ReturnsNull()
{
// Arrange
var context = new PoolItDbContext(new DbContextOptionsBuilder <PoolItDbContext>()
.UseInMemoryDatabase(Guid.NewGuid().ToString())
.Options);
context.CarModels.Add(new CarModel
{
Model = "OtherModel",
Manufacturer = new CarManufacturer
{
Name = "OtherManufacturer"
}
});
context.SaveChanges();
var modelsService = new ModelsService(new EfRepository <CarModel>(context));
// Act
var result = await modelsService.GetAllByManufacturerAsync(null);
// Assert
Assert.Null(result);
}
public async Task GetAllByManufacturerAsync_WithData_WorksCorrectly()
{
// Arrange
var expectedResults = new[] { "Model1", "Model2", "Model3" }
.OrderBy(m => m)
.ToArray();
var context = new PoolItDbContext(new DbContextOptionsBuilder <PoolItDbContext>()
.UseInMemoryDatabase(Guid.NewGuid().ToString())
.Options);
var manufacturer = new CarManufacturer
{
Name = "TestManufacturer"
};
foreach (var model in expectedResults)
{
context.CarModels.Add(new CarModel
{
Model = model,
Manufacturer = manufacturer
});
}
context.CarModels.Add(new CarModel
{
Model = "OtherModel",
Manufacturer = new CarManufacturer
{
Name = "OtherManufacturer"
}
});
context.SaveChanges();
var modelsService = new ModelsService(new EfRepository <CarModel>(context));
// Act
var actualResults = (await modelsService.GetAllByManufacturerAsync(manufacturer.Id))
.Select(m => m.Model)
.OrderBy(m => m)
.ToArray();
// Assert
Assert.Equal(expectedResults, actualResults);
}
public async Task GetAllByManufacturerAsync_WithNonExistentManufacturer_ReturnsEmptyEnumerable()
{
// Arrange
var testId = Guid.NewGuid().ToString();
var context = new PoolItDbContext(new DbContextOptionsBuilder <PoolItDbContext>()
.UseInMemoryDatabase(Guid.NewGuid().ToString())
.Options);
var modelsService = new ModelsService(new EfRepository <CarModel>(context));
// Act
var actualResult = (await modelsService.GetAllByManufacturerAsync(testId)).Count();
// Assert
const int expectedResult = 0;
Assert.Equal(expectedResult, actualResult);
}