public async void It_throws_object_disposed_exception()
{
var context = new DbContext(new DbContextOptions <DbContext>());
context.Dispose();
// methods (tests all paths)
Assert.Throws <ObjectDisposedException>(() => context.Add(new object()));
Assert.Throws <ObjectDisposedException>(() => context.Query <object>());
Assert.Throws <ObjectDisposedException>(() => context.Find(typeof(Random), 77));
Assert.Throws <ObjectDisposedException>(() => context.Attach(new object()));
Assert.Throws <ObjectDisposedException>(() => context.Update(new object()));
Assert.Throws <ObjectDisposedException>(() => context.Remove(new object()));
Assert.Throws <ObjectDisposedException>(() => context.SaveChanges());
await Assert.ThrowsAsync <ObjectDisposedException>(() => context.SaveChangesAsync());
await Assert.ThrowsAsync <ObjectDisposedException>(() => context.AddAsync(new object()));
await Assert.ThrowsAsync <ObjectDisposedException>(() => context.FindAsync(typeof(Random), 77));
var methodCount = typeof(DbContext).GetMethods(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly).Count();
var expectedMethodCount = 42;
Assert.True(
methodCount == expectedMethodCount,
userMessage: $"Expected {expectedMethodCount} methods on DbContext but found {methodCount}. " +
"Update test to ensure all methods throw ObjectDisposedException after dispose.");
// getters
Assert.Throws <ObjectDisposedException>(() => context.ChangeTracker);
Assert.Throws <ObjectDisposedException>(() => context.Model);
var expectedProperties = new List <string>
{
nameof(DbContext.ChangeTracker),
nameof(DbContext.Database),
nameof(DbContext.IsDisposed),
nameof(DbContext.Model)
};
Assert.True(
expectedProperties.SequenceEqual(
typeof(DbContext)
.GetProperties()
.Select(p => p.Name)
.OrderBy(s => s)
.ToList()),
userMessage: "Unexpected properties on DbContext. " +
"Update test to ensure all getters throw ObjectDisposedException after dispose.");
Assert.Throws <ObjectDisposedException>(() => ((IInfrastructure <IServiceProvider>)context).Instance);
}
public DbQuery <T> View <T>() where T : class => _dbContext.Query <T>();
public static IQueryable Query(this DbContext context, string entityName) => context.Query(context.Model.FindEntityType(entityName).ClrType);
