public async Task Should_Change_Setting_Values()
        {
            var session = new MyChangableSession();

            var settingManager = new SettingManager(CreateMockSettingDefinitionManager())
            {
                SettingStore = new MemorySettingStore(),
                AbpSession = session
            };

            //Application level changes

            await settingManager.ChangeSettingForApplicationAsync(MyAppLevelSetting, "53");
            await settingManager.ChangeSettingForApplicationAsync(MyAppLevelSetting, "54");
            await settingManager.ChangeSettingForApplicationAsync(MyAllLevelsSetting, "application level changed value");

            (await settingManager.SettingStore.GetSettingOrNullAsync(null, null, MyAppLevelSetting)).Value.ShouldBe("54");

            (await settingManager.GetSettingValueAsync<int>(MyAppLevelSetting)).ShouldBe(54);
            (await settingManager.GetSettingValueAsync(MyAllLevelsSetting)).ShouldBe("application level changed value");

            //Tenant level changes

            session.TenantId = 1;
            await settingManager.ChangeSettingForTenantAsync(1, MyAllLevelsSetting, "tenant 1 changed value");
            (await settingManager.GetSettingValueAsync(MyAllLevelsSetting)).ShouldBe("tenant 1 changed value");

            //User level changes

            session.UserId = 1;
            await settingManager.ChangeSettingForUserAsync(1, MyAllLevelsSetting, "user 1 changed value");
            (await settingManager.GetSettingValueAsync(MyAllLevelsSetting)).ShouldBe("user 1 changed value");
        }
        public async Task Should_Delete_Setting_Values_On_Default_Value()
        {
            var session = new MyChangableSession();
            var store = new MemorySettingStore();

            var settingManager = new SettingManager(CreateMockSettingDefinitionManager())
            {
                SettingStore = store,
                AbpSession = session
            };

            session.TenantId = 1;
            session.UserId = 1;

            //We can get user's personal stored value
            (await store.GetSettingOrNullAsync(null, 1, MyAllLevelsSetting)).ShouldNotBe(null);
            (await settingManager.GetSettingValueAsync(MyAllLevelsSetting)).ShouldBe("user 1 stored value");

            //This will delete setting for the user since it's same as tenant's setting value
            await settingManager.ChangeSettingForUserAsync(1, MyAllLevelsSetting, "tenant 1 stored value");
            (await store.GetSettingOrNullAsync(null, 1, MyAllLevelsSetting)).ShouldBe(null);

            //We can get tenant's setting value
            (await store.GetSettingOrNullAsync(1, null, MyAllLevelsSetting)).ShouldNotBe(null);
            (await settingManager.GetSettingValueAsync(MyAllLevelsSetting)).ShouldBe("tenant 1 stored value");

            //This will delete setting for tenant since it's same as application's setting value
            await settingManager.ChangeSettingForTenantAsync(1, MyAllLevelsSetting, "application level stored value");
            (await store.GetSettingOrNullAsync(null, 1, MyAllLevelsSetting)).ShouldBe(null);

            //We can get application's value
            (await store.GetSettingOrNullAsync(null, null, MyAllLevelsSetting)).ShouldNotBe(null);
            (await settingManager.GetSettingValueAsync(MyAllLevelsSetting)).ShouldBe("application level stored value");

            //This will delete setting for application since it's same as the default value of the setting
            await settingManager.ChangeSettingForApplicationAsync(MyAllLevelsSetting, "application level default value");
            (await store.GetSettingOrNullAsync(null, null, MyAllLevelsSetting)).ShouldBe(null);

            //Now, there is no setting value, default value should return
            (await settingManager.GetSettingValueAsync(MyAllLevelsSetting)).ShouldBe("application level default value");
        }