C#•15mo ago

❔ Looking for an AutoFixture struct customization workaround

Hello, Autofixture's .Do() customization doesn't work with value types which makes sense because nothing gets returned. I'm trying to have autofixture create a start time that is guaranteed to be before an end time within a value type. The following is what I have that works for reference types but not value types. If anyone has any work arounds to make autofixture generate start times before end time I would greatly appreciate it.

        struct TimeRange
        {
            public Instant startTime;
            public Instant endTime;
        }
        [Theory, AutoData]
        public void StartEndTime([Range(1, 100)] int cardinality)
        {
            var fixture = new Fixture();
            var timeRanges = fixture.Build<TimeRange>()
                .Without(e => e.startTime)
                .Without(e => e.endTime)
                .Do(e =>
                {
                    e.startTime = fixture.Create<Instant>();
                    e.endTime = e.startTime + fixture.Create<Duration>();
                })
                .CreateMany(cardinality)
                .ToList();

            timeRanges.Should().AllSatisfy(e =>
                {
                    e.startTime.Should().BeLessThan(e.endTime);
                });
        }

        struct TimeRange
        {
            public Instant startTime;
            public Instant endTime;
        }
        [Theory, AutoData]
        public void StartEndTime([Range(1, 100)] int cardinality)
        {
            var fixture = new Fixture();
            var timeRanges = fixture.Build<TimeRange>()
                .Without(e => e.startTime)
                .Without(e => e.endTime)
                .Do(e =>
                {
                    e.startTime = fixture.Create<Instant>();
                    e.endTime = e.startTime + fixture.Create<Duration>();
                })
                .CreateMany(cardinality)
                .ToList();

            timeRanges.Should().AllSatisfy(e =>
                {
                    e.startTime.Should().BeLessThan(e.endTime);
                });
        }

1 Reply

Accord•15mo ago

Looks like nothing has happened here. I will mark this as stale and this post will be archived until there is new activity.

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❔ Looking for an AutoFixture struct customization workaround