comphead commented on code in PR #7179:
URL: https://github.com/apache/arrow-rs/pull/7179#discussion_r2025152563
##########
arrow-cast/src/parse.rs:
##########
@@ -2780,6 +2827,55 @@ mod tests {
}
}
+ #[test]
+ fn test_parse_decimal_rounding() {
+ let test_rounding_for_e_notation_varying_scale = [
+ ("1.2345e4", "12345", 2),
+ ("12345e-5", "0.12", 2),
+ ("12345E-5", "0.123", 3),
+ ("12345e-5", "0.1235", 4),
+ ("1265E-4", ".127", 3),
+ ("12.345e3", "12345.000", 3),
+ ("1.2345e4", "12345", 0),
+ ("1.2345e3", "1235", 0),
+ ("1.23e-3", "0", 0),
+ ("123e-2", "1", 0),
+ ("-1e-15", "-0.0000000000", 10),
+ ("1e-15", "0.0000000000", 10),
+ ("1e15", "1000000000000000", 2),
+ ];
Review Comment:
lets also add couple more tests on negative
```
// Edge cases
assert_eq!(round_to_places(-2.5, 0), -3.0); // Negative half
rounding up
assert_eq!(round_to_places(-2.49, 0), -2.0); // Just below rounding
negative
// Whole numbers (should remain unchanged)
assert_eq!(round_to_places(-100.0, 2), -100.0);
```
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