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45 lines
1.6 KiB
Python
45 lines
1.6 KiB
Python
from src.utils import helpers
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def test_get_from_null_dict():
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# null handling
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assert helpers.get_from_dict(dict()) == dict()
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assert helpers.get_from_dict(dict(), None) == None
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# key present in nested dictionary
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# 1-level dictionary
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assert helpers.get_from_dict({'a': 1, 'b': 2}, 'a') == 1
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assert helpers.get_from_dict({'a': 1, 'b': 2}, 'c') == None
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# 2-level dictionary
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assert helpers.get_from_dict({'a': {'a_a': 1}, 'b': 2}, 'a') == {'a_a': 1}
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assert helpers.get_from_dict({'a': {'a_a': 1}, 'b': 2}, 'a', 'a_a') == 1
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# key not present in nested dictionary
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# 2-level_dictionary
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assert helpers.get_from_dict({'a': {'a_a': 1}, 'b': 2}, 'b', 'b_a') == None
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def test_merge_dicts():
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# basic merge of dicts with non-overlapping keys
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assert helpers.merge_dicts(priority_dict={'a': 1}, default_dict={'b': 2}) == {'a': 1, 'b': 2}
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# use default dict items when not present in priority dict
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assert helpers.merge_dicts(priority_dict={}, default_dict={'b': 2}) == {'b': 2}
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# do not override existing key in priority_dict with default dict
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assert helpers.merge_dicts(priority_dict={'a': 1}, default_dict={'a': 2}) == {'a': 1}
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def test_lru_cache():
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# Test initializing cache
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cache = helpers.LRU({'a': 1, 'b': 2}, capacity=2)
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assert cache == {'a': 1, 'b': 2}
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# Test capacity overflow
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cache['c'] = 3
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assert cache == {'b': 2, 'c': 3}
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# Test delete least recently used item from LRU cache on capacity overflow
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cache['b'] # accessing 'b' makes it the most recently used item
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cache['d'] = 4 # so 'c' is deleted from the cache instead of 'b'
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assert cache == {'b': 2, 'd': 4}
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