36 lines
1.3 KiB
Rust
36 lines
1.3 KiB
Rust
// Adapted from https://github.com/Alexhuszagh/rust-lexical.
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use crate::lexical::exponent::*;
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#[test]
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fn scientific_exponent_test() {
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// 0 digits in the integer
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assert_eq!(scientific_exponent(0, 0, 5), -6);
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assert_eq!(scientific_exponent(10, 0, 5), 4);
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assert_eq!(scientific_exponent(-10, 0, 5), -16);
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// >0 digits in the integer
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assert_eq!(scientific_exponent(0, 1, 5), 0);
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assert_eq!(scientific_exponent(0, 2, 5), 1);
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assert_eq!(scientific_exponent(0, 2, 20), 1);
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assert_eq!(scientific_exponent(10, 2, 20), 11);
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assert_eq!(scientific_exponent(-10, 2, 20), -9);
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// Underflow
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assert_eq!(scientific_exponent(i32::MIN, 0, 0), i32::MIN);
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assert_eq!(scientific_exponent(i32::MIN, 0, 5), i32::MIN);
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// Overflow
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assert_eq!(scientific_exponent(i32::MAX, 0, 0), i32::MAX - 1);
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assert_eq!(scientific_exponent(i32::MAX, 5, 0), i32::MAX);
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}
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#[test]
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fn mantissa_exponent_test() {
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assert_eq!(mantissa_exponent(10, 5, 0), 5);
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assert_eq!(mantissa_exponent(0, 5, 0), -5);
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assert_eq!(mantissa_exponent(i32::MAX, 5, 0), i32::MAX - 5);
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assert_eq!(mantissa_exponent(i32::MAX, 0, 5), i32::MAX);
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assert_eq!(mantissa_exponent(i32::MIN, 5, 0), i32::MIN);
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assert_eq!(mantissa_exponent(i32::MIN, 0, 5), i32::MIN + 5);
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}
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