public void DeleteAllClassRecords_Succeed()
{
var dbContext = new SQLConnType(@"localhost\SqlExpress14", "CSG", "sa", "@1Mops4moa");
var sysUnderTest = new ClassRepo(dbContext);
sysUnderTest.DeleteAllAsync();
var result = sysUnderTest.GetAllAsync();
Assert.True(result.Count == 0);
}