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Diffstat (limited to 'third_party/rust/ordered-float/tests')
-rw-r--r-- | third_party/rust/ordered-float/tests/test.rs | 737 |
1 files changed, 737 insertions, 0 deletions
diff --git a/third_party/rust/ordered-float/tests/test.rs b/third_party/rust/ordered-float/tests/test.rs new file mode 100644 index 0000000000..8e6b835a4c --- /dev/null +++ b/third_party/rust/ordered-float/tests/test.rs @@ -0,0 +1,737 @@ +#![allow(clippy::float_cmp, clippy::eq_op, clippy::op_ref)] + +extern crate num_traits; +extern crate ordered_float; + +#[cfg(not(feature = "std"))] +pub use num_traits::float::FloatCore as Float; +#[cfg(feature = "std")] +pub use num_traits::Float; +pub use num_traits::{Bounded, FromPrimitive, Num, One, Signed, ToPrimitive, Zero}; +pub use ordered_float::*; + +pub use std::cmp::Ordering::*; +pub use std::convert::TryFrom; +pub use std::{f32, f64, panic}; + +pub use std::collections::hash_map::RandomState; +pub use std::collections::HashSet; +pub use std::hash::*; + +fn not_nan<T: Float>(x: T) -> NotNan<T> { + NotNan::new(x).unwrap() +} + +#[test] +fn ordered_f32_compare_regular_floats() { + assert_eq!(OrderedFloat(7.0f32).cmp(&OrderedFloat(7.0)), Equal); + assert_eq!(OrderedFloat(8.0f32).cmp(&OrderedFloat(7.0)), Greater); + assert_eq!(OrderedFloat(4.0f32).cmp(&OrderedFloat(7.0)), Less); +} + +#[test] +fn ordered_f32_compare_regular_floats_op() { + assert!(OrderedFloat(7.0f32) == OrderedFloat(7.0)); + assert!(OrderedFloat(7.0f32) <= OrderedFloat(7.0)); + assert!(OrderedFloat(7.0f32) >= OrderedFloat(7.0)); + assert!(OrderedFloat(8.0f32) > OrderedFloat(7.0)); + assert!(OrderedFloat(8.0f32) >= OrderedFloat(7.0)); + assert!(OrderedFloat(4.0f32) < OrderedFloat(7.0)); + assert!(OrderedFloat(4.0f32) <= OrderedFloat(7.0)); +} + +#[test] +fn ordered_f32_compare_nan() { + let f32_nan: f32 = Float::nan(); + assert_eq!( + OrderedFloat(f32_nan).cmp(&OrderedFloat(Float::nan())), + Equal + ); + assert_eq!( + OrderedFloat(f32_nan).cmp(&OrderedFloat(-100000.0f32)), + Greater + ); + assert_eq!( + OrderedFloat(-100.0f32).cmp(&OrderedFloat(Float::nan())), + Less + ); +} + +#[test] +fn ordered_f32_compare_nan_op() { + let f32_nan: OrderedFloat<f32> = OrderedFloat(Float::nan()); + assert!(f32_nan == f32_nan); + assert!(f32_nan <= f32_nan); + assert!(f32_nan >= f32_nan); + assert!(f32_nan > OrderedFloat(-100000.0f32)); + assert!(f32_nan >= OrderedFloat(-100000.0f32)); + assert!(OrderedFloat(-100.0f32) < f32_nan); + assert!(OrderedFloat(-100.0f32) <= f32_nan); + assert!(f32_nan > OrderedFloat(Float::infinity())); + assert!(f32_nan >= OrderedFloat(Float::infinity())); + assert!(f32_nan > OrderedFloat(Float::neg_infinity())); + assert!(f32_nan >= OrderedFloat(Float::neg_infinity())); +} + +#[test] +fn ordered_f64_compare_regular_floats() { + assert_eq!(OrderedFloat(7.0f64).cmp(&OrderedFloat(7.0)), Equal); + assert_eq!(OrderedFloat(8.0f64).cmp(&OrderedFloat(7.0)), Greater); + assert_eq!(OrderedFloat(4.0f64).cmp(&OrderedFloat(7.0)), Less); +} + +#[test] +fn not_nan32_zero() { + assert_eq!(NotNan::<f32>::zero(), 0.0f32); + assert!(NotNan::<f32>::zero().is_zero()); +} + +#[test] +fn not_nan32_one() { + assert_eq!(NotNan::<f32>::one(), 1.0f32) +} + +#[test] +fn not_nan32_bounded() { + assert_eq!(NotNan::<f32>::min_value(), <f32 as Bounded>::min_value()); + assert_eq!(NotNan::<f32>::max_value(), <f32 as Bounded>::max_value()); +} + +#[test] +fn not_nan32_from_primitive() { + assert_eq!(NotNan::<f32>::from_i8(42i8), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_u8(42u8), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_i16(42i16), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_u16(42u16), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_i32(42i32), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_u32(42u32), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_i64(42i64), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_u64(42u64), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_isize(42isize), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_usize(42usize), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_f32(42f32), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_f32(42f32), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_f64(42f64), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_f64(42f64), Some(not_nan(42.0))); + assert_eq!(NotNan::<f32>::from_f32(Float::nan()), None); + assert_eq!(NotNan::<f32>::from_f64(Float::nan()), None); +} + +#[test] +fn not_nan32_to_primitive() { + let x = not_nan(42.0f32); + assert_eq!(x.to_u8(), Some(42u8)); + assert_eq!(x.to_i8(), Some(42i8)); + assert_eq!(x.to_u16(), Some(42u16)); + assert_eq!(x.to_i16(), Some(42i16)); + assert_eq!(x.to_u32(), Some(42u32)); + assert_eq!(x.to_i32(), Some(42i32)); + assert_eq!(x.to_u64(), Some(42u64)); + assert_eq!(x.to_i64(), Some(42i64)); + assert_eq!(x.to_usize(), Some(42usize)); + assert_eq!(x.to_isize(), Some(42isize)); + assert_eq!(x.to_f32(), Some(42f32)); + assert_eq!(x.to_f32(), Some(42f32)); + assert_eq!(x.to_f64(), Some(42f64)); + assert_eq!(x.to_f64(), Some(42f64)); +} + +#[test] +fn not_nan32_num() { + assert_eq!(NotNan::<f32>::from_str_radix("42.0", 10).unwrap(), 42.0f32); + assert!(NotNan::<f32>::from_str_radix("NaN", 10).is_err()); +} + +#[test] +fn not_nan32_signed() { + assert_eq!(not_nan(42f32).abs(), 42f32); + assert_eq!(not_nan(-42f32).abs(), 42f32); + + assert_eq!(not_nan(50f32).abs_sub(¬_nan(8f32)), 42f32); + assert_eq!(not_nan(8f32).abs_sub(¬_nan(50f32)), 0f32); +} + +#[test] +fn not_nan32_num_cast() { + assert_eq!( + <NotNan<f32> as num_traits::NumCast>::from(42).unwrap(), + 42f32 + ); + assert_eq!(<NotNan<f32> as num_traits::NumCast>::from(f32::nan()), None); +} + +#[test] +fn ordered_f64_compare_nan() { + let f64_nan: f64 = Float::nan(); + assert_eq!( + OrderedFloat(f64_nan).cmp(&OrderedFloat(Float::nan())), + Equal + ); + assert_eq!( + OrderedFloat(f64_nan).cmp(&OrderedFloat(-100000.0f64)), + Greater + ); + assert_eq!( + OrderedFloat(-100.0f64).cmp(&OrderedFloat(Float::nan())), + Less + ); +} + +#[test] +fn ordered_f64_compare_regular_floats_op() { + assert!(OrderedFloat(7.0) == OrderedFloat(7.0)); + assert!(OrderedFloat(7.0) <= OrderedFloat(7.0)); + assert!(OrderedFloat(7.0) >= OrderedFloat(7.0)); + assert!(OrderedFloat(8.0) > OrderedFloat(7.0)); + assert!(OrderedFloat(8.0) >= OrderedFloat(7.0)); + assert!(OrderedFloat(4.0) < OrderedFloat(7.0)); + assert!(OrderedFloat(4.0) <= OrderedFloat(7.0)); +} + +#[test] +fn ordered_f64_compare_nan_op() { + let f64_nan: OrderedFloat<f64> = OrderedFloat(Float::nan()); + assert!(f64_nan == f64_nan); + assert!(f64_nan <= f64_nan); + assert!(f64_nan >= f64_nan); + assert!(f64_nan > OrderedFloat(-100000.0)); + assert!(f64_nan >= OrderedFloat(-100000.0)); + assert!(OrderedFloat(-100.0) < f64_nan); + assert!(OrderedFloat(-100.0) <= f64_nan); + assert!(f64_nan > OrderedFloat(Float::infinity())); + assert!(f64_nan >= OrderedFloat(Float::infinity())); + assert!(f64_nan > OrderedFloat(Float::neg_infinity())); + assert!(f64_nan >= OrderedFloat(Float::neg_infinity())); +} + +#[test] +fn not_nan32_compare_regular_floats() { + assert_eq!(not_nan(7.0f32).cmp(¬_nan(7.0)), Equal); + assert_eq!(not_nan(8.0f32).cmp(¬_nan(7.0)), Greater); + assert_eq!(not_nan(4.0f32).cmp(¬_nan(7.0)), Less); +} + +#[test] +fn not_nan32_fail_when_constructing_with_nan() { + let f32_nan: f32 = Float::nan(); + assert!(NotNan::new(f32_nan).is_err()); +} + +#[test] +fn not_nan32_calculate_correctly() { + assert_eq!(*(not_nan(5.0f32) + not_nan(4.0f32)), 5.0f32 + 4.0f32); + assert_eq!(*(not_nan(5.0f32) + 4.0f32), 5.0f32 + 4.0f32); + assert_eq!(*(not_nan(5.0f32) - not_nan(4.0f32)), 5.0f32 - 4.0f32); + assert_eq!(*(not_nan(5.0f32) - 4.0f32), 5.0f32 - 4.0f32); + assert_eq!(*(not_nan(5.0f32) * not_nan(4.0f32)), 5.0f32 * 4.0f32); + assert_eq!(*(not_nan(5.0f32) * 4.0f32), 5.0f32 * 4.0f32); + assert_eq!(*(not_nan(8.0f32) / not_nan(4.0f32)), 8.0f32 / 4.0f32); + assert_eq!(*(not_nan(8.0f32) / 4.0f32), 8.0f32 / 4.0f32); + assert_eq!(*(not_nan(8.0f32) % not_nan(4.0f32)), 8.0f32 % 4.0f32); + assert_eq!(*(not_nan(8.0f32) % 4.0f32), 8.0f32 % 4.0f32); + assert_eq!(*(-not_nan(1.0f32)), -1.0f32); + + assert!(panic::catch_unwind(|| not_nan(0.0f32) + f32::NAN).is_err()); + assert!(panic::catch_unwind(|| not_nan(0.0f32) - f32::NAN).is_err()); + assert!(panic::catch_unwind(|| not_nan(0.0f32) * f32::NAN).is_err()); + assert!(panic::catch_unwind(|| not_nan(0.0f32) / f32::NAN).is_err()); + assert!(panic::catch_unwind(|| not_nan(0.0f32) % f32::NAN).is_err()); + + let mut number = not_nan(5.0f32); + number += not_nan(4.0f32); + assert_eq!(*number, 9.0f32); + number -= not_nan(4.0f32); + assert_eq!(*number, 5.0f32); + number *= not_nan(4.0f32); + assert_eq!(*number, 20.0f32); + number /= not_nan(4.0f32); + assert_eq!(*number, 5.0f32); + number %= not_nan(4.0f32); + assert_eq!(*number, 1.0f32); + + number = not_nan(5.0f32); + number += 4.0f32; + assert_eq!(*number, 9.0f32); + number -= 4.0f32; + assert_eq!(*number, 5.0f32); + number *= 4.0f32; + assert_eq!(*number, 20.0f32); + number /= 4.0f32; + assert_eq!(*number, 5.0f32); + number %= 4.0f32; + assert_eq!(*number, 1.0f32); + + assert!(panic::catch_unwind(|| { + let mut tmp = not_nan(0.0f32); + tmp += f32::NAN; + }) + .is_err()); + assert!(panic::catch_unwind(|| { + let mut tmp = not_nan(0.0f32); + tmp -= f32::NAN; + }) + .is_err()); + assert!(panic::catch_unwind(|| { + let mut tmp = not_nan(0.0f32); + tmp *= f32::NAN; + }) + .is_err()); + assert!(panic::catch_unwind(|| { + let mut tmp = not_nan(0.0f32); + tmp /= f32::NAN; + }) + .is_err()); + assert!(panic::catch_unwind(|| { + let mut tmp = not_nan(0.0f32); + tmp %= f32::NAN; + }) + .is_err()); +} + +#[test] +fn not_nan64_compare_regular_floats() { + assert_eq!(not_nan(7.0f64).cmp(¬_nan(7.0)), Equal); + assert_eq!(not_nan(8.0f64).cmp(¬_nan(7.0)), Greater); + assert_eq!(not_nan(4.0f64).cmp(¬_nan(7.0)), Less); +} + +#[test] +fn not_nan64_fail_when_constructing_with_nan() { + let f64_nan: f64 = Float::nan(); + assert!(NotNan::new(f64_nan).is_err()); +} + +#[test] +fn not_nan64_calculate_correctly() { + assert_eq!(*(not_nan(5.0f64) + not_nan(4.0f64)), 5.0f64 + 4.0f64); + assert_eq!(*(not_nan(5.0f64) + 4.0f64), 5.0f64 + 4.0f64); + assert_eq!(*(not_nan(5.0f64) - not_nan(4.0f64)), 5.0f64 - 4.0f64); + assert_eq!(*(not_nan(5.0f64) - 4.0f64), 5.0f64 - 4.0f64); + assert_eq!(*(not_nan(5.0f64) * not_nan(4.0f64)), 5.0f64 * 4.0f64); + assert_eq!(*(not_nan(5.0f64) * 4.0f64), 5.0f64 * 4.0f64); + assert_eq!(*(not_nan(8.0f64) / not_nan(4.0f64)), 8.0f64 / 4.0f64); + assert_eq!(*(not_nan(8.0f64) / 4.0f64), 8.0f64 / 4.0f64); + assert_eq!(*(not_nan(8.0f64) % not_nan(4.0f64)), 8.0f64 % 4.0f64); + assert_eq!(*(not_nan(8.0f64) % 4.0f64), 8.0f64 % 4.0f64); + assert_eq!(*(-not_nan(1.0f64)), -1.0f64); + + assert!(panic::catch_unwind(|| not_nan(0.0f64) + f64::NAN).is_err()); + assert!(panic::catch_unwind(|| not_nan(0.0f64) - f64::NAN).is_err()); + assert!(panic::catch_unwind(|| not_nan(0.0f64) * f64::NAN).is_err()); + assert!(panic::catch_unwind(|| not_nan(0.0f64) / f64::NAN).is_err()); + assert!(panic::catch_unwind(|| not_nan(0.0f64) % f64::NAN).is_err()); + + let mut number = not_nan(5.0f64); + number += not_nan(4.0f64); + assert_eq!(*number, 9.0f64); + number -= not_nan(4.0f64); + assert_eq!(*number, 5.0f64); + number *= not_nan(4.0f64); + assert_eq!(*number, 20.0f64); + number /= not_nan(4.0f64); + assert_eq!(*number, 5.0f64); + number %= not_nan(4.0f64); + assert_eq!(*number, 1.0f64); + + number = not_nan(5.0f64); + number += 4.0f64; + assert_eq!(*number, 9.0f64); + number -= 4.0f64; + assert_eq!(*number, 5.0f64); + number *= 4.0f64; + assert_eq!(*number, 20.0f64); + number /= 4.0f64; + assert_eq!(*number, 5.0f64); + number %= 4.0f64; + assert_eq!(*number, 1.0f64); + + assert!(panic::catch_unwind(|| { + let mut tmp = not_nan(0.0f64); + tmp += f64::NAN; + }) + .is_err()); + assert!(panic::catch_unwind(|| { + let mut tmp = not_nan(0.0f64); + tmp -= f64::NAN; + }) + .is_err()); + assert!(panic::catch_unwind(|| { + let mut tmp = not_nan(0.0f64); + tmp *= f64::NAN; + }) + .is_err()); + assert!(panic::catch_unwind(|| { + let mut tmp = not_nan(0.0f64); + tmp /= f64::NAN; + }) + .is_err()); + assert!(panic::catch_unwind(|| { + let mut tmp = not_nan(0.0f64); + tmp %= f64::NAN; + }) + .is_err()); +} + +#[test] +fn not_nan64_zero() { + assert_eq!(NotNan::<f64>::zero(), not_nan(0.0f64)); + assert!(NotNan::<f64>::zero().is_zero()); +} + +#[test] +fn not_nan64_one() { + assert_eq!(NotNan::<f64>::one(), not_nan(1.0f64)) +} + +#[test] +fn not_nan64_bounded() { + assert_eq!(NotNan::<f64>::min_value(), <f64 as Bounded>::min_value()); + assert_eq!(NotNan::<f64>::max_value(), <f64 as Bounded>::max_value()); +} + +#[test] +fn not_nan64_from_primitive() { + assert_eq!(NotNan::<f64>::from_i8(42i8), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_u8(42u8), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_i16(42i16), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_u16(42u16), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_i32(42i32), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_u32(42u32), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_i64(42i64), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_u64(42u64), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_isize(42isize), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_usize(42usize), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_f64(42f64), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_f64(42f64), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_f64(42f64), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_f64(42f64), Some(not_nan(42.0))); + assert_eq!(NotNan::<f64>::from_f64(Float::nan()), None); + assert_eq!(NotNan::<f64>::from_f64(Float::nan()), None); +} + +#[test] +fn not_nan64_to_primitive() { + let x = not_nan(42.0f64); + assert_eq!(x.to_u8(), Some(42u8)); + assert_eq!(x.to_i8(), Some(42i8)); + assert_eq!(x.to_u16(), Some(42u16)); + assert_eq!(x.to_i16(), Some(42i16)); + assert_eq!(x.to_u32(), Some(42u32)); + assert_eq!(x.to_i32(), Some(42i32)); + assert_eq!(x.to_u64(), Some(42u64)); + assert_eq!(x.to_i64(), Some(42i64)); + assert_eq!(x.to_usize(), Some(42usize)); + assert_eq!(x.to_isize(), Some(42isize)); + assert_eq!(x.to_f64(), Some(42f64)); + assert_eq!(x.to_f64(), Some(42f64)); + assert_eq!(x.to_f64(), Some(42f64)); + assert_eq!(x.to_f64(), Some(42f64)); +} + +#[test] +fn not_nan64_num() { + assert_eq!( + NotNan::<f64>::from_str_radix("42.0", 10).unwrap(), + not_nan(42.0f64) + ); + assert!(NotNan::<f64>::from_str_radix("NaN", 10).is_err()); +} + +#[test] +fn not_nan64_signed() { + assert_eq!(not_nan(42f64).abs(), not_nan(42f64)); + assert_eq!(not_nan(-42f64).abs(), not_nan(42f64)); + + assert_eq!(not_nan(50f64).abs_sub(¬_nan(8f64)), not_nan(42f64)); + assert_eq!(not_nan(8f64).abs_sub(¬_nan(50f64)), not_nan(0f64)); +} + +#[test] +fn not_nan64_num_cast() { + assert_eq!( + <NotNan<f64> as num_traits::NumCast>::from(42), + Some(not_nan(42f64)) + ); + assert_eq!(<NotNan<f64> as num_traits::NumCast>::from(f64::nan()), None); +} + +#[test] +fn hash_zero_and_neg_zero_to_the_same_hc() { + let state = RandomState::new(); + let mut h1 = state.build_hasher(); + let mut h2 = state.build_hasher(); + OrderedFloat::from(0f64).hash(&mut h1); + OrderedFloat::from(-0f64).hash(&mut h2); + assert_eq!(h1.finish(), h2.finish()); +} + +#[test] +fn hash_inf_and_neg_inf_to_different_hcs() { + let state = RandomState::new(); + let mut h1 = state.build_hasher(); + let mut h2 = state.build_hasher(); + OrderedFloat::from(f64::INFINITY).hash(&mut h1); + OrderedFloat::from(f64::NEG_INFINITY).hash(&mut h2); + assert!(h1.finish() != h2.finish()); +} + +#[test] +fn hash_is_good_for_whole_numbers() { + let state = RandomState::new(); + let limit = 10000; + + let mut set = ::std::collections::HashSet::with_capacity(limit); + for i in 0..limit { + let mut h = state.build_hasher(); + OrderedFloat::from(i as f64).hash(&mut h); + set.insert(h.finish()); + } + + // This allows 100 collisions, which is far too + // many, but should guard against transient issues + // that will result from using RandomState + let pct_unique = set.len() as f64 / limit as f64; + assert!(0.99f64 < pct_unique, "percent-unique={}", pct_unique); +} + +#[test] +fn hash_is_good_for_fractional_numbers() { + let state = RandomState::new(); + let limit = 10000; + + let mut set = ::std::collections::HashSet::with_capacity(limit); + for i in 0..limit { + let mut h = state.build_hasher(); + OrderedFloat::from(i as f64 * (1f64 / limit as f64)).hash(&mut h); + set.insert(h.finish()); + } + + // This allows 100 collisions, which is far too + // many, but should guard against transient issues + // that will result from using RandomState + let pct_unique = set.len() as f64 / limit as f64; + assert!(0.99f64 < pct_unique, "percent-unique={}", pct_unique); +} + +#[test] +#[should_panic] +fn test_add_fails_on_nan() { + let a = not_nan(std::f32::INFINITY); + let b = not_nan(std::f32::NEG_INFINITY); + let _c = a + b; +} + +#[test] +#[should_panic] +fn test_add_fails_on_nan_ref() { + let a = not_nan(std::f32::INFINITY); + let b = not_nan(std::f32::NEG_INFINITY); + let _c = a + &b; +} + +#[test] +#[should_panic] +fn test_add_fails_on_nan_ref_ref() { + let a = not_nan(std::f32::INFINITY); + let b = not_nan(std::f32::NEG_INFINITY); + let _c = &a + &b; +} + +#[test] +#[should_panic] +fn test_add_fails_on_nan_t_ref() { + let a = not_nan(std::f32::INFINITY); + let b = std::f32::NEG_INFINITY; + let _c = a + &b; +} + +#[test] +#[should_panic] +fn test_add_fails_on_nan_ref_t_ref() { + let a = not_nan(std::f32::INFINITY); + let b = std::f32::NEG_INFINITY; + let _c = &a + &b; +} + +#[test] +#[should_panic] +fn test_add_fails_on_nan_ref_t() { + let a = not_nan(std::f32::INFINITY); + let b = std::f32::NEG_INFINITY; + let _c = &a + b; +} + +#[test] +#[should_panic] +fn test_add_assign_fails_on_nan_ref() { + let mut a = not_nan(std::f32::INFINITY); + let b = not_nan(std::f32::NEG_INFINITY); + a += &b; +} + +#[test] +#[should_panic] +fn test_add_assign_fails_on_nan_t_ref() { + let mut a = not_nan(std::f32::INFINITY); + let b = std::f32::NEG_INFINITY; + a += &b; +} + +#[test] +#[should_panic] +fn test_add_assign_fails_on_nan_t() { + let mut a = not_nan(std::f32::INFINITY); + let b = std::f32::NEG_INFINITY; + a += b; +} + +#[test] +fn add() { + assert_eq!(not_nan(0.0) + not_nan(0.0), 0.0); + assert_eq!(not_nan(0.0) + ¬_nan(0.0), 0.0); + assert_eq!(¬_nan(0.0) + not_nan(0.0), 0.0); + assert_eq!(¬_nan(0.0) + ¬_nan(0.0), 0.0); + assert_eq!(not_nan(0.0) + 0.0, 0.0); + assert_eq!(not_nan(0.0) + &0.0, 0.0); + assert_eq!(¬_nan(0.0) + 0.0, 0.0); + assert_eq!(¬_nan(0.0) + &0.0, 0.0); + + assert_eq!(OrderedFloat(0.0) + OrderedFloat(0.0), 0.0); + assert_eq!(OrderedFloat(0.0) + &OrderedFloat(0.0), 0.0); + assert_eq!(&OrderedFloat(0.0) + OrderedFloat(0.0), 0.0); + assert_eq!(OrderedFloat(0.0) + 0.0, 0.0); + assert_eq!(OrderedFloat(0.0) + &0.0, 0.0); + assert_eq!(&OrderedFloat(0.0) + 0.0, 0.0); + assert_eq!(&OrderedFloat(0.0) + &0.0, 0.0); +} + +#[test] +fn ordered_f32_neg() { + assert_eq!(OrderedFloat(-7.0f32), -OrderedFloat(7.0f32)); +} + +#[test] +fn ordered_f64_neg() { + assert_eq!(OrderedFloat(-7.0f64), -OrderedFloat(7.0f64)); +} + +#[test] +#[should_panic] +fn test_sum_fails_on_nan() { + let a = not_nan(std::f32::INFINITY); + let b = not_nan(std::f32::NEG_INFINITY); + let _c: NotNan<_> = [a, b].iter().sum(); +} + +#[test] +#[should_panic] +fn test_product_fails_on_nan() { + let a = not_nan(std::f32::INFINITY); + let b = not_nan(0f32); + let _c: NotNan<_> = [a, b].iter().product(); +} + +#[test] +fn not_nan64_sum_product() { + let a = not_nan(2138.1237); + let b = not_nan(132f64); + let c = not_nan(5.1); + + assert_eq!( + std::iter::empty::<NotNan<f64>>().sum::<NotNan<_>>(), + NotNan::new(0f64).unwrap() + ); + assert_eq!([a].iter().sum::<NotNan<_>>(), a); + assert_eq!([a, b].iter().sum::<NotNan<_>>(), a + b); + assert_eq!([a, b, c].iter().sum::<NotNan<_>>(), a + b + c); + + assert_eq!( + std::iter::empty::<NotNan<f64>>().product::<NotNan<_>>(), + NotNan::new(1f64).unwrap() + ); + assert_eq!([a].iter().product::<NotNan<_>>(), a); + assert_eq!([a, b].iter().product::<NotNan<_>>(), a * b); + assert_eq!([a, b, c].iter().product::<NotNan<_>>(), a * b * c); +} + +#[test] +fn not_nan_usage_in_const_context() { + const A: NotNan<f32> = unsafe { NotNan::new_unchecked(111f32) }; + assert_eq!(A, NotNan::new(111f32).unwrap()); +} + +#[test] +fn not_nan_panic_safety() { + let catch_op = |mut num, op: fn(&mut NotNan<_>)| { + let mut num_ref = panic::AssertUnwindSafe(&mut num); + #[allow(clippy::needless_borrow)] // mut-borrow needed for msrv 1.36.0 + let _ = panic::catch_unwind(move || op(&mut num_ref)); + num + }; + + assert!(!catch_op(not_nan(f32::INFINITY), |a| *a += f32::NEG_INFINITY).is_nan()); + assert!(!catch_op(not_nan(f32::INFINITY), |a| *a -= f32::INFINITY).is_nan()); + assert!(!catch_op(not_nan(0.0), |a| *a *= f32::INFINITY).is_nan()); + assert!(!catch_op(not_nan(0.0), |a| *a /= 0.0).is_nan()); + assert!(!catch_op(not_nan(0.0), |a| *a %= 0.0).is_nan()); +} + +#[test] +fn from_ref() { + let f = 1.0f32; + let o: &OrderedFloat<f32> = (&f).into(); + assert_eq!(*o, 1.0f32); + + let mut f = 1.0f64; + let o: &OrderedFloat<f64> = (&f).into(); + assert_eq!(*o, 1.0f64); + + let o: &mut OrderedFloat<f64> = (&mut f).into(); + assert_eq!(*o, 1.0f64); + *o = OrderedFloat(2.0); + assert_eq!(*o, 2.0f64); + assert_eq!(f, 2.0f64); +} + +#[cfg(feature = "arbitrary")] +mod arbitrary_test { + use super::{NotNan, OrderedFloat}; + use arbitrary::{Arbitrary, Unstructured}; + + #[test] + fn exhaustive() { + // Exhaustively search all patterns of sign and exponent bits plus a few mantissa bits. + for high_bytes in 0..=u16::MAX { + let [h1, h2] = high_bytes.to_be_bytes(); + + // Each of these should not + // * panic, + // * return an error, or + // * need more bytes than given. + let n32: NotNan<f32> = Unstructured::new(&[h1, h2, h1, h2]) + .arbitrary() + .expect("NotNan<f32> failure"); + let n64: NotNan<f64> = Unstructured::new(&[h1, h2, h1, h2, h1, h2, h1, h2]) + .arbitrary() + .expect("NotNan<f64> failure"); + let _: OrderedFloat<f32> = Unstructured::new(&[h1, h2, h1, h2]) + .arbitrary() + .expect("OrderedFloat<f32> failure"); + let _: OrderedFloat<f64> = Unstructured::new(&[h1, h2, h1, h2, h1, h2, h1, h2]) + .arbitrary() + .expect("OrderedFloat<f64> failure"); + + // Check for violation of NotNan's property of never containing a NaN. + assert!(!n32.into_inner().is_nan()); + assert!(!n64.into_inner().is_nan()); + } + } + + #[test] + fn size_hints() { + assert_eq!(NotNan::<f32>::size_hint(0), (4, Some(4))); + assert_eq!(NotNan::<f64>::size_hint(0), (8, Some(8))); + assert_eq!(OrderedFloat::<f32>::size_hint(0), (4, Some(4))); + assert_eq!(OrderedFloat::<f64>::size_hint(0), (8, Some(8))); + } +} |