124 lines
2.7 KiB
Python
124 lines
2.7 KiB
Python
import os
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from typing import List, Optional
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import pytest
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from pandas import read_csv, read_table
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class BaseParser:
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engine: Optional[str] = None
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low_memory = True
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float_precision_choices: List[Optional[str]] = []
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def update_kwargs(self, kwargs):
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kwargs = kwargs.copy()
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kwargs.update(dict(engine=self.engine, low_memory=self.low_memory))
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return kwargs
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def read_csv(self, *args, **kwargs):
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kwargs = self.update_kwargs(kwargs)
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return read_csv(*args, **kwargs)
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def read_table(self, *args, **kwargs):
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kwargs = self.update_kwargs(kwargs)
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return read_table(*args, **kwargs)
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class CParser(BaseParser):
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engine = "c"
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float_precision_choices = [None, "high", "round_trip"]
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class CParserHighMemory(CParser):
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low_memory = False
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class CParserLowMemory(CParser):
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low_memory = True
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class PythonParser(BaseParser):
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engine = "python"
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float_precision_choices = [None]
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@pytest.fixture
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def csv_dir_path(datapath):
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"""
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The directory path to the data files needed for parser tests.
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"""
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return datapath("io", "parser", "data")
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@pytest.fixture
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def csv1(csv_dir_path):
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"""
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The path to the data file "test1.csv" needed for parser tests.
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"""
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return os.path.join(csv_dir_path, "test1.csv")
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_cParserHighMemory = CParserHighMemory()
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_cParserLowMemory = CParserLowMemory()
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_pythonParser = PythonParser()
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_py_parsers_only = [_pythonParser]
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_c_parsers_only = [_cParserHighMemory, _cParserLowMemory]
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_all_parsers = [*_c_parsers_only, *_py_parsers_only]
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_py_parser_ids = ["python"]
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_c_parser_ids = ["c_high", "c_low"]
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_all_parser_ids = [*_c_parser_ids, *_py_parser_ids]
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@pytest.fixture(params=_all_parsers, ids=_all_parser_ids)
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def all_parsers(request):
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"""
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Fixture all of the CSV parsers.
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"""
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return request.param
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@pytest.fixture(params=_c_parsers_only, ids=_c_parser_ids)
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def c_parser_only(request):
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"""
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Fixture all of the CSV parsers using the C engine.
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"""
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return request.param
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@pytest.fixture(params=_py_parsers_only, ids=_py_parser_ids)
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def python_parser_only(request):
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"""
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Fixture all of the CSV parsers using the Python engine.
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"""
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return request.param
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_utf_values = [8, 16, 32]
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_encoding_seps = ["", "-", "_"]
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_encoding_prefixes = ["utf", "UTF"]
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_encoding_fmts = [
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f"{prefix}{sep}" + "{0}" for sep in _encoding_seps for prefix in _encoding_prefixes
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]
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@pytest.fixture(params=_utf_values)
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def utf_value(request):
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"""
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Fixture for all possible integer values for a UTF encoding.
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"""
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return request.param
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@pytest.fixture(params=_encoding_fmts)
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def encoding_fmt(request):
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"""
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Fixture for all possible string formats of a UTF encoding.
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"""
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return request.param
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