public void DoubleVariationDetailReturnsValueAndReason()
        {
            testData.UsePreconfiguredFlag(new FeatureFlagBuilder("key").OffWithValue(LdValue.Of(2.5d)).Build());

            var expected = new EvaluationDetail <double>(2.5d, 0, EvaluationReason.OffReason);

            Assert.Equal(expected, client.DoubleVariationDetail("key", user, 1.0d));
        }