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68 lines
2.1 KiB
Python
68 lines
2.1 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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import weakref
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import numpy as np
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import pyarrow as pa
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from pyarrow.lib import StringBuilder
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def test_weakref():
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sbuilder = StringBuilder()
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wr = weakref.ref(sbuilder)
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assert wr() is not None
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del sbuilder
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assert wr() is None
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def test_string_builder_append():
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sbuilder = StringBuilder()
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sbuilder.append(b"a byte string")
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sbuilder.append("a string")
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sbuilder.append(np.nan)
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sbuilder.append(None)
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assert len(sbuilder) == 4
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assert sbuilder.null_count == 2
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arr = sbuilder.finish()
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assert len(sbuilder) == 0
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assert isinstance(arr, pa.Array)
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assert arr.null_count == 2
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assert arr.type == 'str'
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expected = ["a byte string", "a string", None, None]
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assert arr.to_pylist() == expected
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def test_string_builder_append_values():
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sbuilder = StringBuilder()
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sbuilder.append_values([np.nan, None, "text", None, "other text"])
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assert sbuilder.null_count == 3
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arr = sbuilder.finish()
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assert arr.null_count == 3
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expected = [None, None, "text", None, "other text"]
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assert arr.to_pylist() == expected
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def test_string_builder_append_after_finish():
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sbuilder = StringBuilder()
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sbuilder.append_values([np.nan, None, "text", None, "other text"])
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arr = sbuilder.finish()
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sbuilder.append("No effect")
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expected = [None, None, "text", None, "other text"]
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assert arr.to_pylist() == expected
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