How to use test_check_single_column method in pandera

Best Python code snippet using pandera_python

test_model.py

Source:test_model.py

...211            return series < 100212    df = pd.DataFrame({2020: [99]})213    assert len(Schema.to_schema().columns[2020].checks) == 2214    assert isinstance(Schema.validate(df, lazy=True), pd.DataFrame)215def test_check_single_column() -> None:216    """Test the behaviour of a check on a single column."""217    class Schema(pa.SchemaModel):218        a: Series[int]219        @pa.check("a")220        def int_column_lt_100(cls, series: pd.Series) -> Iterable[bool]:221            # pylint:disable=no-self-argument222            assert cls is Schema223            return series < 100224    df = pd.DataFrame({"a": [101]})225    schema = Schema.to_schema()226    err_msg = r"Column\s*a\s*int_column_lt_100\s*\[101\]\s*1"227    with pytest.raises(pa.errors.SchemaErrors, match=err_msg):228        schema.validate(df, lazy=True)229def test_check_single_index() -> None:...

test_0074_single_column.py

Source:test_0074_single_column.py

2from unittest import TestCase3from indexdigest.linters import check_single_column4from indexdigest.test import DatabaseTestMixin5class TestSingleColumn(TestCase, DatabaseTestMixin):6    def test_check_single_column(self):7        reports = list(check_single_column(self.connection))8        print(list(map(str, reports)))9        self.assertEqual(len(reports), 1)10        self.assertEqual(str(reports[0]),11                         '0074_bag_of_ints: "0074_bag_of_ints" has just a single column')12        self.assertTrue('CREATE TABLE `0074_bag_of_ints` (' in reports[0].context['schema'])...

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