public static void ThenRelatedEntityCannotBeDeleted <TEntity>(DbContextFixture fixture, object key) where TEntity : class
{
using var dbContext = fixture.NewDbContext();
var entity = dbContext.Set <TEntity>().Find(key);
Assert.NotNull(entity);
dbContext.Set <TEntity>().Remove(entity);
Assert.Throws <DbUpdateException>(() => dbContext.SaveChanges());
}
public static void PropertyIsRequired <TEntity>(DbContextFixture fixture, TEntity entity, Expression <Func <TEntity, object> > propertySelector) where TEntity : class
{
LinqExpressionExtensions.AssignValue(entity, propertySelector, null);
using (var dbContext = fixture.NewDbContext())
{
dbContext.Set <TEntity>().Add(entity);
var exception = Assert.Throws <DbUpdateException>(() => dbContext.SaveChanges());
Assert.Contains("NOT NULL", exception.ToString());
}
}
public static void VerifyCrudOperationsOn <T, TKey>(DbContextFixture fixture, T newValue, Func <T, TKey> getKey, Action <T> update, Func <T, bool> assertEqual) where T : class, new()
{
TKey key;
using (var dbContext = fixture.NewDbContext())
{
var entityEntry = dbContext.Set <T>().Add(newValue);
dbContext.SaveChanges();
key = getKey(entityEntry.Entity);
}
using (var dbContext = fixture.NewDbContext())
{
var entity = dbContext.Find <T>(key);
Assert.NotNull(entity);
update(entity);
dbContext.SaveChanges();
}
using (var dbContext = fixture.NewDbContext())
{
var entity = dbContext.Find <T>(key);
Assert.True(assertEqual(entity));
}
using (var dbContext = fixture.NewDbContext())
{
var entity = dbContext.Find <T>(key);
dbContext.Set <T>().Remove(entity);
dbContext.SaveChanges();
}
using (var dbContext = fixture.NewDbContext())
{
var entity = dbContext.Find <T>(key);
Assert.Null(entity);
}
}