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Touch up new float roundtrip test from PR 671

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David Tolnay 2020-06-07 00:21:30 -07:00
parent 9091105d98
commit db60f98bc3
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1 changed files with 13 additions and 15 deletions
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28
tests/test.rs
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@ -906,34 +906,32 @@ fn test_parse_f64() {
]);
}
// test roundtrip with some values that failed with the old version of the f64 deserializer
// Test roundtrip with some values that were not perfectly roundtripped by the
// old f64 deserializer.
#[test]
fn test_roundtrip_f64() {
let roundtrip = |input: &f64| {
let json = serde_json::to_string(input).unwrap();
let output: f64 = serde_json::from_str(&json).unwrap();
assert_eq!(input, &output);
};
[
// samples from quickcheck-ing `roundtrip` with `input: f64`
// comments on the right showed the value returned by the old deserializer
for &float in &[
// Samples from quickcheck-ing roundtrip with `input: f64`. Comments
// indicate the value returned by the old deserializer.
51.24817837550540_4, // 51.2481783755054_1
-93.3113703768803_3, // -93.3113703768803_2
-36.5739948427534_36, // -36.5739948427534_4
52.31400820410624_4, // 52.31400820410624_
97.45365320034685, // 97.4536532003468_4
// samples from `rng.next_u64` + `f64::from_bits` + `is_finite` filter
// Samples from `rng.next_u64` + `f64::from_bits` + `is_finite` filter.
2.0030397744267762e-253,
7.101215824554616e260,
1.769268377902049e74,
-1.6727517818542075e58,
3.9287532173373315e299,
// edge case from https://github.com/serde-rs/json/issues/536#issuecomment-583714900
// Edge case from:
// https://github.com/serde-rs/json/issues/536#issuecomment-583714900
2.638344616030823e-256,
]
.iter()
.for_each(roundtrip);
] {
let json = serde_json::to_string(&float).unwrap();
let output: f64 = serde_json::from_str(&json).unwrap();
assert_eq!(float, output);
}
}
#[test]