Unit test cases for apache#3744 (CSV reader infers Date64 type for fi…

…elds like "2020-03-19 00:00:00" that it can't parse to Date64)

arrow-cast/src/cast.rs

@@ -4887,7 +4887,17 @@ mod tests {
             Some("Not a valid date"),
             None,
         ])) as ArrayRef;
-        for array in &[a1, a2] {
+        let a3 = Arc::new(StringArray::from(vec![
+            Some("2020-09-08 12:00:00"),
+            Some("Not a valid date"),
+            None,
+        ])) as ArrayRef;
+        let a4 = Arc::new(LargeStringArray::from(vec![
+            Some("2020-09-08 12:00:00"),
+            Some("Not a valid date"),
+            None,
+        ])) as ArrayRef;
+        for array in &[a1, a2, a3, a4] {
             let to_type = DataType::Date64;
             let b = cast(array, &to_type).unwrap();
             let c = b.as_any().downcast_ref::<Date64Array>().unwrap();

arrow-csv/src/reader/mod.rs

@@ -1789,6 +1789,19 @@ mod tests {
         );
     }
 
+    #[test]
+    fn test_can_parse_inferred_date64() {
+        let raw = "1900-02-28 12:34:56";
+        assert_eq!(
+            infer_field_schema(raw, None),
+            DataType::Date64
+        );
+        assert_eq!(
+            parse_item::<Date64Type>(raw),
+            Some(-2203932304000)
+        );
+    }
+
     #[test]
     fn test_parse_decimal() {
         let tests = [