chore: import upstream snapshot with attribution

rust/perspective-python/perspective/tests/table/test_table_arrow.py

@@ -0,0 +1,500 @@
+#  ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+#  ┃ ██████ ██████ ██████       █      █      █      █      █ █▄  ▀███ █       ┃
+#  ┃ ▄▄▄▄▄█ █▄▄▄▄▄ ▄▄▄▄▄█  ▀▀▀▀▀█▀▀▀▀▀ █ ▀▀▀▀▀█ ████████▌▐███ ███▄  ▀█ █ ▀▀▀▀▀ ┃
+#  ┃ █▀▀▀▀▀ █▀▀▀▀▀ █▀██▀▀ ▄▄▄▄▄ █ ▄▄▄▄▄█ ▄▄▄▄▄█ ████████▌▐███ █████▄   █ ▄▄▄▄▄ ┃
+#  ┃ █      ██████ █  ▀█▄       █ ██████      █      ███▌▐███ ███████▄ █       ┃
+#  ┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
+#  ┃ Copyright (c) 2017, the Perspective Authors.                              ┃
+#  ┃ ╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌ ┃
+#  ┃ This file is part of the Perspective library, distributed under the terms ┃
+#  ┃ of the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). ┃
+#  ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+import os.path
+import numpy as np
+import pandas as pd
+from perspective.tests.conftest import Util
+import pyarrow as pa
+from datetime import date, datetime
+import perspective as psp
+
+
+client = psp.Server().new_local_client()
+Table = client.table
+
+DATE32_ARROW = os.path.join(os.path.dirname(__file__), "arrow", "date32.arrow")
+DATE64_ARROW = os.path.join(os.path.dirname(__file__), "arrow", "date64.arrow")
+DICT_ARROW = os.path.join(os.path.dirname(__file__), "arrow", "dict.arrow")
+
+
+names = ["a", "b", "c", "d"]
+
+# Create sample data for every integer type
+ALL_INTEGERS_DATA = {
+    "int8": pa.array([1, 2, 3], type=pa.int8()),
+    "int16": pa.array([1000, 2000, 3000], type=pa.int16()),
+    "int32": pa.array([100000, 200000, 300000], type=pa.int32()),
+    "int64": pa.array([10000000000, 20000000000, 30000000000], type=pa.int64()),
+    "uint8": pa.array([1, 2, 3], type=pa.uint8()),
+    "uint16": pa.array([1000, 2000, 3000], type=pa.uint16()),
+    "uint32": pa.array([100000, 200000, 300000], type=pa.uint32()),
+    "uint64": pa.array([10000000000, 20000000000, 30000000000], type=pa.uint64()),
+    "float32": pa.array([100000.0, 200000.0, 300000.0], type=pa.float32()),
+    "float64": pa.array(
+        [10000000000.0, 20000000000.0, 30000000000.0], type=pa.float64()
+    ),
+}
+
+ALL_INTEGERS_TABLE = pa.Table.from_pydict(ALL_INTEGERS_DATA)
+
+
+class TestTableArrow(object):
+    def test_table_with_integer_types(self):
+        tbl = Table(ALL_INTEGERS_TABLE)
+        assert tbl.size() == 3
+        assert tbl.schema() == {
+            "int8": "integer",
+            "int16": "integer",
+            "int32": "integer",
+            "int64": "integer",
+            "uint8": "integer",
+            "uint16": "integer",
+            "uint32": "integer",
+            "uint64": "integer",
+            "float32": "float",
+            "float64": "float",
+        }
+        for k, values in ALL_INTEGERS_DATA.items():
+            v = tbl.view(filter=[[k, "==", values[0].as_py()]])
+            assert len(v.to_json()) == 1
+
+    def test_table_arrow_loads_date32_file(self, util: Util):
+        with open(DATE32_ARROW, mode="rb") as file:  # b is important -> binary
+            tbl = Table(file.read())
+            assert tbl.schema() == {
+                "jan-2019": "date",
+                "feb-2020": "date",
+                "mar-2019": "date",
+                "apr-2020": "date",
+            }
+            assert tbl.size() == 31
+            view = tbl.view()
+            assert view.to_columns() == {
+                "jan-2019": [
+                    util.to_timestamp(datetime(2019, 1, i)) for i in range(1, 32)
+                ],
+                "feb-2020": [
+                    util.to_timestamp(datetime(2020, 2, i)) for i in range(1, 30)
+                ]
+                + [None, None],
+                "mar-2019": [
+                    util.to_timestamp(datetime(2019, 3, i)) for i in range(1, 32)
+                ],
+                "apr-2020": [
+                    util.to_timestamp(datetime(2020, 4, i)) for i in range(1, 31)
+                ]
+                + [None],
+            }
+
+    def test_table_arrow_loads_date64_file(self, util: Util):
+        with open(DATE64_ARROW, mode="rb") as file:  # b is important -> binary
+            tbl = Table(file.read())
+            assert tbl.schema() == {
+                "jan-2019": "date",
+                "feb-2020": "date",
+                "mar-2019": "date",
+                "apr-2020": "date",
+            }
+            assert tbl.size() == 31
+            view = tbl.view()
+            assert view.to_columns() == {
+                "jan-2019": [
+                    util.to_timestamp(datetime(2019, 1, i)) for i in range(1, 32)
+                ],
+                "feb-2020": [
+                    util.to_timestamp(datetime(2020, 2, i)) for i in range(1, 30)
+                ]
+                + [None, None],
+                "mar-2019": [
+                    util.to_timestamp(datetime(2019, 3, i)) for i in range(1, 32)
+                ],
+                "apr-2020": [
+                    util.to_timestamp(datetime(2020, 4, i)) for i in range(1, 31)
+                ]
+                + [None],
+            }
+
+    def test_table_arrow_loads_dict_file(self):
+        with open(DICT_ARROW, mode="rb") as file:  # b is important -> binary
+            tbl = Table(file.read())
+            assert tbl.schema() == {"a": "string", "b": "string"}
+            assert tbl.size() == 5
+            assert tbl.view().to_columns() == {
+                "a": ["abc", "def", "def", None, "abc"],
+                "b": ["klm", "hij", None, "hij", "klm"],
+            }
+
+    # streams
+
+    def test_table_arrow_loads_int_stream(self, util):
+        data = [list(range(10)) for i in range(4)]
+        arrow_data = util.make_arrow(names, data)
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {
+            "a": "integer",
+            "b": "integer",
+            "c": "integer",
+            "d": "integer",
+        }
+        assert tbl.view().to_columns() == {
+            "a": data[0],
+            "b": data[1],
+            "c": data[2],
+            "d": data[3],
+        }
+
+    def test_empty_arrow(self, util):
+        table = pa.table(
+            {
+                "col1": [1, 2, 3],
+                "col2": ["abc", "foo", "bar"],
+            }
+        )
+
+        empty_table = table.schema.empty_table()
+        assert client.table(table, name="table2").size() == 3
+        assert client.table(empty_table, name="table_empty_bad").size() == 0
+        assert client.table(table, name="table3").schema() == {
+            "col1": "integer",
+            "col2": "string",
+        }
+
+        assert client.table(empty_table, name="table4").schema() == {
+            "col1": "integer",
+            "col2": "string",
+        }
+
+    def test_table_arrow_loads_float_stream(self, util):
+        data = [[i for i in range(10)], [i * 1.5 for i in range(10)]]
+        arrow_data = util.make_arrow(["a", "b"], data)
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {
+            "a": "integer",
+            "b": "float",
+        }
+        assert tbl.view().to_columns() == {"a": data[0], "b": data[1]}
+
+    def test_table_arrow_loads_decimal_stream(self, util):
+        data = [[i * 1000 for i in range(10)]]
+        arrow_data = util.make_arrow(["a"], data, types=[pa.decimal128(4)])
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {
+            "a": "float",
+        }
+        assert tbl.view().to_columns() == {"a": data[0]}
+
+    def test_table_arrow_loads_bool_stream(self, util):
+        data = [[True if i % 2 == 0 else False for i in range(10)]]
+        arrow_data = util.make_arrow(["a"], data)
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {"a": "boolean"}
+        assert tbl.view().to_columns() == {"a": data[0]}
+
+    def test_table_arrow_loads_date32_stream(self, util):
+        data = [[date(2019, 2, i) for i in range(1, 11)]]
+        arrow_data = util.make_arrow(["a"], data, types=[pa.date32()])
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {"a": "date"}
+        assert tbl.view().to_columns() == {
+            "a": [util.to_timestamp(datetime(2019, 2, i)) for i in range(1, 11)]
+        }
+
+    def test_table_arrow_loads_date64_stream(self, util):
+        data = [[date(2019, 2, i) for i in range(1, 11)]]
+        arrow_data = util.make_arrow(["a"], data, types=[pa.date64()])
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {"a": "date"}
+        assert tbl.view().to_columns() == {
+            "a": [util.to_timestamp(datetime(2019, 2, i)) for i in range(1, 11)]
+        }
+
+    def test_table_arrow_loads_timestamp_all_formats_stream(self, util):
+        data = [
+            [datetime(2019, 2, i, 9) for i in range(1, 11)],
+            [datetime(2019, 2, i, 10) for i in range(1, 11)],
+            [datetime(2019, 2, i, 11) for i in range(1, 11)],
+            [datetime(2019, 2, i, 12) for i in range(1, 11)],
+        ]
+        arrow_data = util.make_arrow(
+            names,
+            data,
+            types=[
+                pa.timestamp("s"),
+                pa.timestamp("ms"),
+                pa.timestamp("us"),
+                pa.timestamp("ns"),
+            ],
+        )
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {
+            "a": "datetime",
+            "b": "datetime",
+            "c": "datetime",
+            "d": "datetime",
+        }
+        assert tbl.view().to_columns() == {
+            "a": [util.to_timestamp(i) for i in data[0]],
+            "b": [util.to_timestamp(i) for i in data[1]],
+            "c": [util.to_timestamp(i) for i in data[2]],
+            "d": [util.to_timestamp(i) for i in data[3]],
+        }
+
+    def test_table_arrow_loads_string_stream(self, util):
+        data = [[str(i) for i in range(10)]]
+        arrow_data = util.make_arrow(["a"], data, types=[pa.string()])
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {"a": "string"}
+        assert tbl.view().to_columns() == {"a": data[0]}
+
+    def test_table_arrow_loads_dictionary_stream_int8(self, util):
+        data = [
+            ([0, 1, 1, None], ["abc", "def"]),
+            ([0, 1, None, 2], ["xx", "yy", "zz"]),
+        ]
+        types = [[pa.int8(), pa.string()]] * 2
+        arrow_data = util.make_dictionary_arrow(["a", "b"], data, types=types)
+        tbl = Table(arrow_data)
+
+        assert tbl.size() == 4
+        assert tbl.schema() == {"a": "string", "b": "string"}
+        assert tbl.view().to_columns() == {
+            "a": ["abc", "def", "def", None],
+            "b": ["xx", "yy", None, "zz"],
+        }
+
+    def test_table_arrow_loads_dictionary_stream_int16(self, util):
+        data = [
+            ([0, 1, 1, None], ["abc", "def"]),
+            ([0, 1, None, 2], ["xx", "yy", "zz"]),
+        ]
+        types = [[pa.int16(), pa.string()]] * 2
+        arrow_data = util.make_dictionary_arrow(["a", "b"], data, types=types)
+        tbl = Table(arrow_data)
+
+        assert tbl.size() == 4
+        assert tbl.schema() == {"a": "string", "b": "string"}
+        assert tbl.view().to_columns() == {
+            "a": ["abc", "def", "def", None],
+            "b": ["xx", "yy", None, "zz"],
+        }
+
+    def test_table_arrow_loads_dictionary_stream_int32(self, util):
+        data = [
+            ([0, 1, 1, None], ["abc", "def"]),
+            ([0, 1, None, 2], ["xx", "yy", "zz"]),
+        ]
+        types = [[pa.int32(), pa.string()]] * 2
+        arrow_data = util.make_dictionary_arrow(["a", "b"], data, types=types)
+        tbl = Table(arrow_data)
+
+        assert tbl.size() == 4
+        assert tbl.schema() == {"a": "string", "b": "string"}
+        assert tbl.view().to_columns() == {
+            "a": ["abc", "def", "def", None],
+            "b": ["xx", "yy", None, "zz"],
+        }
+
+    def test_table_arrow_loads_dictionary_stream_int64(self, util):
+        data = [
+            ([0, 1, 1, None], ["abc", "def"]),
+            ([0, 1, None, 2], ["xx", "yy", "zz"]),
+        ]
+        arrow_data = util.make_dictionary_arrow(["a", "b"], data)
+        tbl = Table(arrow_data)
+
+        assert tbl.size() == 4
+        assert tbl.schema() == {"a": "string", "b": "string"}
+        assert tbl.view().to_columns() == {
+            "a": ["abc", "def", "def", None],
+            "b": ["xx", "yy", None, "zz"],
+        }
+
+    def test_table_arrow_loads_dictionary_stream_nones(self, util):
+        data = [([None, 0, 1, 2], ["", "abc", "def"])]
+        arrow_data = util.make_dictionary_arrow(["a"], data)
+        tbl = Table(arrow_data)
+
+        assert tbl.size() == 4
+        assert tbl.schema() == {"a": "string"}
+        assert tbl.view().to_columns() == {"a": [None, "", "abc", "def"]}
+
+    def test_table_arrow_loads_dictionary_stream_nones_indexed(self, util):
+        data = [
+            ([1, None, 0, 2], ["", "abc", "def"]),
+            ([2, 1, 0, None], ["", "hij", "klm"]),
+        ]  # ["abc", None, "", "def"]  # ["klm", "hij", "", None]
+        arrow_data = util.make_dictionary_arrow(["a", "b"], data)
+        tbl = Table(arrow_data, index="a")  # column "a" is sorted
+
+        assert tbl.schema() == {"a": "string", "b": "string"}
+        assert tbl.view().to_columns() == {
+            "a": [None, "", "abc", "def"],
+            "b": ["hij", "", "klm", None],
+        }
+
+    def test_table_arrow_loads_dictionary_stream_nones_indexed_2(self, util):
+        """Test the other column, just in case."""
+        data = [
+            ([1, None, 0, 2], ["", "abc", "def"]),
+            ([2, 1, 0, None], ["", "hij", "klm"]),
+        ]  # ["abc", None, "", "def"]  # ["klm", "hij", "", None]
+        arrow_data = util.make_dictionary_arrow(["a", "b"], data)
+        tbl = Table(arrow_data, index="b")  # column "b" is sorted
+
+        assert tbl.schema() == {"a": "string", "b": "string"}
+        assert tbl.view().to_columns() == {
+            "a": ["def", "", None, "abc"],
+            "b": [None, "", "hij", "klm"],
+        }
+
+    # legacy
+
+    def test_table_arrow_loads_int_legacy(self, util):
+        data = [list(range(10)) for i in range(4)]
+        arrow_data = util.make_arrow(names, data, legacy=True)
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {
+            "a": "integer",
+            "b": "integer",
+            "c": "integer",
+            "d": "integer",
+        }
+
+    def test_table_arrow_loads_float_legacy(self, util):
+        data = [[i for i in range(10)], [i * 1.5 for i in range(10)]]
+        arrow_data = util.make_arrow(["a", "b"], data, legacy=True)
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {
+            "a": "integer",
+            "b": "float",
+        }
+        assert tbl.view().to_columns() == {"a": data[0], "b": data[1]}
+
+    def test_table_arrow_loads_decimal128_legacy(self, util):
+        data = [[i * 1000 for i in range(10)]]
+        arrow_data = util.make_arrow(["a"], data, types=[pa.decimal128(4)], legacy=True)
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {
+            "a": "float",
+        }
+        assert tbl.view().to_columns() == {"a": data[0]}
+
+    def test_table_arrow_loads_bool_legacy(self, util):
+        data = [[True if i % 2 == 0 else False for i in range(10)]]
+        arrow_data = util.make_arrow(["a"], data, legacy=True)
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {"a": "boolean"}
+        assert tbl.view().to_columns() == {"a": data[0]}
+
+    def test_table_arrow_loads_date32_legacy(self, util):
+        data = [[date(2019, 2, i) for i in range(1, 11)]]
+        arrow_data = util.make_arrow(["a"], data, types=[pa.date32()], legacy=True)
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {"a": "date"}
+        assert tbl.view().to_columns() == {
+            "a": [util.to_timestamp(datetime(2019, 2, i)) for i in range(1, 11)]
+        }
+
+    def test_table_arrow_loads_date64_legacy(self, util):
+        data = [[date(2019, 2, i) for i in range(1, 11)]]
+        arrow_data = util.make_arrow(["a"], data, types=[pa.date64()], legacy=True)
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {"a": "date"}
+        assert tbl.view().to_columns() == {
+            "a": [util.to_timestamp(datetime(2019, 2, i)) for i in range(1, 11)]
+        }
+
+    def test_table_arrow_loads_timestamp_all_formats_legacy(self, util):
+        data = [
+            [datetime(2019, 2, i, 9) for i in range(1, 11)],
+            [datetime(2019, 2, i, 10) for i in range(1, 11)],
+            [datetime(2019, 2, i, 11) for i in range(1, 11)],
+            [datetime(2019, 2, i, 12) for i in range(1, 11)],
+        ]
+        arrow_data = util.make_arrow(
+            names,
+            data,
+            types=[
+                pa.timestamp("s"),
+                pa.timestamp("ms"),
+                pa.timestamp("us"),
+                pa.timestamp("ns"),
+            ],
+            legacy=True,
+        )
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {
+            "a": "datetime",
+            "b": "datetime",
+            "c": "datetime",
+            "d": "datetime",
+        }
+        assert tbl.view().to_columns() == {
+            "a": [util.to_timestamp(i) for i in data[0]],
+            "b": [util.to_timestamp(i) for i in data[1]],
+            "c": [util.to_timestamp(i) for i in data[2]],
+            "d": [util.to_timestamp(i) for i in data[3]],
+        }
+
+    def test_table_arrow_loads_string_legacy(self, util):
+        data = [[str(i) for i in range(10)]]
+        arrow_data = util.make_arrow(["a"], data, types=[pa.string()], legacy=True)
+        tbl = Table(arrow_data)
+        assert tbl.size() == 10
+        assert tbl.schema() == {"a": "string"}
+        assert tbl.view().to_columns() == {"a": data[0]}
+
+    def test_table_arrow_loads_dictionary_legacy(self, util):
+        data = [([0, 1, 1, None], ["a", "b"]), ([0, 1, None, 2], ["x", "y", "z"])]
+        arrow_data = util.make_dictionary_arrow(["a", "b"], data, legacy=True)
+        tbl = Table(arrow_data)
+
+        assert tbl.size() == 4
+        assert tbl.schema() == {"a": "string", "b": "string"}
+        assert tbl.view().to_columns() == {
+            "a": ["a", "b", "b", None],
+            "b": ["x", "y", None, "z"],
+        }
+
+    def test_table_arrow_loads_arrow_from_df_with_nan(self):
+        data = pd.DataFrame({"a": [1.5, 2.5, np.nan, 3.5, 4.5, np.nan, np.nan, np.nan]})
+
+        arrow_table = pa.Table.from_pandas(data, preserve_index=False)
+
+        assert arrow_table["a"].null_count == 4
+
+        tbl = Table(arrow_table)
+        assert tbl.size() == 8
+
+        # check types
+        assert tbl.schema() == {"a": "float"}
+
+        # check nans
+        json = tbl.view().to_columns()
+
+        assert json["a"] == [1.5, 2.5, None, 3.5, 4.5, None, None, None]