mirror of
https://github.com/saymrwulf/zipline.git
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b03fc40474
Fixes a bunch of places where we weren't calling recursive_repr appropriately, and adds tests for them.
105 lines
2.7 KiB
Python
105 lines
2.7 KiB
Python
"""Tests for the zipline.pipeline.data.DataSet and related functionality.
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"""
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from textwrap import dedent
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from zipline.pipeline.data.dataset import Column, DataSet
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from zipline.testing import chrange, ZiplineTestCase
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from zipline.testing.predicates import assert_messages_equal
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class SomeDataSet(DataSet):
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a = Column(dtype=float)
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b = Column(dtype=object)
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c = Column(dtype=int, missing_value=-1)
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exists_but_not_a_column = 'foo'
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# A DataSet with lots of columns.
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class LargeDataSet(DataSet):
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locals().update({
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name: Column(dtype=float)
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for name in chrange('a', 'z')
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})
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class GetColumnTestCase(ZiplineTestCase):
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def test_get_column_success(self):
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a = SomeDataSet.a
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b = SomeDataSet.b
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c = SomeDataSet.c
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# Run multiple times to validate caching of descriptor return values.
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for _ in range(3):
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self.assertIs(SomeDataSet.get_column('a'), a)
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self.assertIs(SomeDataSet.get_column('b'), b)
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self.assertIs(SomeDataSet.get_column('c'), c)
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def test_get_column_failure(self):
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with self.assertRaises(AttributeError) as e:
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SomeDataSet.get_column('arglebargle')
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result = str(e.exception)
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expected = dedent(
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"""\
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SomeDataSet has no column 'arglebargle':
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Possible choices are:
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- a
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- b
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- c"""
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)
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assert_messages_equal(result, expected)
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def test_get_column_failure_but_attribute_exists(self):
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attr = 'exists_but_not_a_column'
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self.assertTrue(hasattr(SomeDataSet, attr))
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with self.assertRaises(AttributeError) as e:
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SomeDataSet.get_column(attr)
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result = str(e.exception)
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expected = dedent(
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"""\
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SomeDataSet has no column 'exists_but_not_a_column':
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Possible choices are:
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- a
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- b
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- c"""
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)
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assert_messages_equal(result, expected)
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def test_get_column_failure_truncate_error_message(self):
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with self.assertRaises(AttributeError) as e:
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LargeDataSet.get_column('arglebargle')
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result = str(e.exception)
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expected = dedent(
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"""\
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LargeDataSet has no column 'arglebargle':
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Possible choices are:
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- a
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- b
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- c
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- d
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- e
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- f
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- g
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- h
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- i
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- ...
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- z"""
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)
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assert_messages_equal(result, expected)
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class ReprTestCase(ZiplineTestCase):
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def test_dataset_repr(self):
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self.assertEqual(
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repr(SomeDataSet),
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"<DataSet: 'SomeDataSet', domain=GENERIC>"
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)
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