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