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65 lines
1.5 KiB
Python
65 lines
1.5 KiB
Python
"""Config provider examples."""
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from dependency_injector import catalogs
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from dependency_injector import providers
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class ObjectA(object):
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"""Example class ObjectA, that has dependencies on some setting values."""
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def __init__(self, fee, price, timezone):
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"""Initializer."""
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self.fee = fee
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self.price = price
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self.timezone = timezone
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class Catalog(catalogs.DeclarativeCatalog):
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"""Catalog of providers."""
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config = providers.Config()
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""":type: providers.Config"""
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object_a = providers.Factory(ObjectA,
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fee=config.FEE,
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price=config.PRICE,
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timezone=config.GLOBAL.TIMEZONE)
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""":type: providers.Provider -> ObjectA"""
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# Setting config value and making some tests.
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Catalog.config.update_from({
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'FEE': 1.25,
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'PRICE': 2.99,
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'GLOBAL': {
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'TIMEZONE': 'US/Eastern'
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}
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})
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object_a1 = Catalog.object_a()
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assert object_a1.fee == 1.25
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assert object_a1.price == 2.99
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assert object_a1.timezone == 'US/Eastern'
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# Changing config value one more time and making some tests.
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Catalog.config.update_from({
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'FEE': 5.25,
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'PRICE': 19.99,
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'GLOBAL': {
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'TIMEZONE': 'US/Western'
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}
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})
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object_a2 = Catalog.object_a()
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# New one ObjectA has new config values.
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assert object_a2.fee == 5.25
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assert object_a2.price == 19.99
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assert object_a2.timezone == 'US/Western'
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# And old one has old ones.
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assert object_a1.fee == 1.25
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assert object_a1.price == 2.99
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assert object_a1.timezone == 'US/Eastern'
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