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44 lines
1.1 KiB
Python
44 lines
1.1 KiB
Python
"""Callable provider examples."""
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from objects import AbstractCatalog
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from objects.providers import Singleton
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from objects.providers import Callable
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from objects.injections import InitArg
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from objects.injections import Attribute
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from objects.injections import Injection
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import sqlite3
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def consuming_function(arg, db):
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"""Example function that has input arg and dependency on database."""
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return arg, db
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class Catalog(AbstractCatalog):
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"""Catalog of objects providers."""
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database = Singleton(sqlite3.Connection,
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InitArg('database', ':memory:'),
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Attribute('row_factory', sqlite3.Row))
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""":type: (objects.Provider) -> sqlite3.Connection"""
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consuming_function = Callable(consuming_function,
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Injection('db', database))
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""":type: (objects.Provider) -> consuming_function"""
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# Some calls.
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arg1, db1 = Catalog.consuming_function(1)
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arg2, db2 = Catalog.consuming_function(2)
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arg3, db3 = Catalog.consuming_function(3)
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# Some asserts.
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assert db1 is db2 is db3
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assert arg1 == 1
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assert arg2 == 2
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assert arg3 == 3
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