Adding upstream version 0.12.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tests/unit_tests/test_create_backend.py

@@ -0,0 +1,54 @@
+from datetime import date, datetime
+
+import pyarrow as pa
+from textual_fastdatatable.backend import create_backend
+
+MAX_32BIT_INT = 2**31 - 1
+MAX_64BIT_INT = 2**63 - 1
+
+
+def test_empty_sequence() -> None:
+    backend = create_backend(data=[])
+    assert backend
+    assert backend.row_count == 0
+    assert backend.column_count == 0
+    assert backend.columns == []
+    assert backend.column_content_widths == []
+
+
+def test_infinity_timestamps() -> None:
+    from_py = create_backend(
+        data={"dt": [date.max, date.min], "ts": [datetime.max, datetime.min]}
+    )
+    assert from_py
+    assert from_py.row_count == 2
+
+    from_arrow = create_backend(
+        data=pa.table(
+            {
+                "dt32": [
+                    pa.scalar(MAX_32BIT_INT, type=pa.date32()),
+                    pa.scalar(-MAX_32BIT_INT, type=pa.date32()),
+                ],
+                "dt64": [
+                    pa.scalar(MAX_64BIT_INT, type=pa.date64()),
+                    pa.scalar(-MAX_64BIT_INT, type=pa.date64()),
+                ],
+                "ts": [
+                    pa.scalar(MAX_64BIT_INT, type=pa.timestamp("s")),
+                    pa.scalar(-MAX_64BIT_INT, type=pa.timestamp("s")),
+                ],
+                "tns": [
+                    pa.scalar(MAX_64BIT_INT, type=pa.timestamp("ns")),
+                    pa.scalar(-MAX_64BIT_INT, type=pa.timestamp("ns")),
+                ],
+            }
+        )
+    )
+    assert from_arrow
+    assert from_arrow.row_count == 2
+    assert from_arrow.get_row_at(0) == [date.max, date.max, datetime.max, datetime.max]
+    assert from_arrow.get_row_at(1) == [date.min, date.min, datetime.min, datetime.min]
+    assert from_arrow.get_column_at(0) == [date.max, date.min]
+    assert from_arrow.get_column_at(2) == [datetime.max, datetime.min]
+    assert from_arrow.get_cell_at(0, 0) == date.max