andygrove commented on a change in pull request #8794:
URL: https://github.com/apache/arrow/pull/8794#discussion_r532995916
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File path: rust/arrow/src/compute/kernels/cast.rs
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@@ -2720,6 +2743,42 @@ mod tests {
.collect()
}
+ #[test]
+ fn test_cast_utf8_to_date32() {
+ use chrono::{NaiveDate, NaiveTime};
+
+ let a = StringArray::from(vec![
+ "2000-01-01",
+ "2000-2-2",
+ "2000-00-00",
+ "2000-01-01T12:00:00",
+ "2000",
+ ]);
+ let array = Arc::new(a) as ArrayRef;
+ let b = cast(&array, &DataType::Date32(DateUnit::Day)).unwrap();
+ let c = b.as_any().downcast_ref::<Date32Array>().unwrap();
+
+ let zero_time = NaiveTime::from_hms(0, 0, 0);
+
+ let date_value = (NaiveDate::from_ymd(2000, 1, 1)
+ .and_time(zero_time)
+ .timestamp()
+ / SECONDS_IN_DAY) as i32;
+ assert_eq!(true, c.is_valid(0));
+ assert_eq!(date_value, c.value(0));
+
+ let date_value = (NaiveDate::from_ymd(2000, 2, 2)
+ .and_time(zero_time)
+ .timestamp()
+ / SECONDS_IN_DAY) as i32;
+ assert_eq!(true, c.is_valid(1));
+ assert_eq!(date_value, c.value(1));
+
+ assert_eq!(false, c.is_valid(2));
+ assert_eq!(false, c.is_valid(3));
+ assert_eq!(false, c.is_valid(4));
Review comment:
~This looks great. Could we get some tests added for invalid inputs as
well?~ Never mind, I was misreading this.
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