Comments (6)
I agree, this would be nice to have.
For what it's worth, Haskell's QuickCheck generates none of those values for its Arbitrary Float
and Arbitrary Double
instances (as of version 2.7.6).
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Does anyone know why Haskell's QuickCheck doesn't generate those special values?
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Including subnormals might be good too.
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Related problem: f64
and f32
values are always in range between -100 and 100
quickcheck! {
fn float_range(n: f64) -> bool {
n < 100.0 && n > -100.0
}
}
This test never fails.
quickcheck version = 0.4.2
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Regarding Haskell's quickcheck and floats here is related discussion:
nick8325/quickcheck#98
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However for Float, the NaN values are problematic since they violate the typeclass laws.
Doesn't sound like an issue for Rust, just saying, due to PartialEq
and Eq
being separate.
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Related Issues (20)
- Cannot use Rng methods on `Gen` when implementing `Arbitrary` HOT 5
- Identity checking HOT 3
- Stack overflow in quickcheck case shrinking HOT 3
- example case sort TEST FAILED HOT 1
- QuickChecking Const Generic Code HOT 5
- Implement Arbitrary for AsMut<[T: Arbitrary]> HOT 2
- Infinite Repetition/Never Ending Test with `f32` and `f64`. HOT 17
- Q: Idiomatic way to specify the length of an arbitrary vector HOT 7
- <newbie> How to generate a number within a range HOT 2
- Negating an integer leads to stack overflow HOT 2
- upgrade notes would be nice. HOT 1
- debug_reprs taking up 41% of test runtime HOT 2
- warning: panic message is not a string literal HOT 1
- Rng Size for Vec Arbitrary cannot be 0
- Impl Clone for Gen
- Implement something like choose_weighted for `Gen`
- Is this still maintained? HOT 1
- Is quickcheck still maintained? HOT 1
- How to combine quickcheck 1+ with fake? HOT 3
- Durations's Arbitrary instance is dependant on Gen's size HOT 1
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