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107 lines
3.6 KiB
Python
107 lines
3.6 KiB
Python
from functools import lru_cache
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import json
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import pytest
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from referencing import Registry, Resource, exceptions
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from referencing.jsonschema import DRAFT202012
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from referencing.retrieval import to_cached_resource
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class TestToCachedResource:
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def test_it_caches_retrieved_resources(self):
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contents = {"$schema": "https://json-schema.org/draft/2020-12/schema"}
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stack = [json.dumps(contents)]
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@to_cached_resource()
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def retrieve(uri):
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return stack.pop()
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registry = Registry(retrieve=retrieve)
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expected = Resource.from_contents(contents)
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got = registry.get_or_retrieve("urn:example:schema")
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assert got.value == expected
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# And a second time we get the same value.
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again = registry.get_or_retrieve("urn:example:schema")
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assert again.value is got.value
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def test_custom_loader(self):
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contents = {"$schema": "https://json-schema.org/draft/2020-12/schema"}
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stack = [json.dumps(contents)[::-1]]
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@to_cached_resource(loads=lambda s: json.loads(s[::-1]))
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def retrieve(uri):
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return stack.pop()
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registry = Registry(retrieve=retrieve)
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expected = Resource.from_contents(contents)
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got = registry.get_or_retrieve("urn:example:schema")
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assert got.value == expected
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# And a second time we get the same value.
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again = registry.get_or_retrieve("urn:example:schema")
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assert again.value is got.value
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def test_custom_from_contents(self):
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contents = {}
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stack = [json.dumps(contents)]
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@to_cached_resource(from_contents=DRAFT202012.create_resource)
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def retrieve(uri):
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return stack.pop()
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registry = Registry(retrieve=retrieve)
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expected = DRAFT202012.create_resource(contents)
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got = registry.get_or_retrieve("urn:example:schema")
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assert got.value == expected
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# And a second time we get the same value.
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again = registry.get_or_retrieve("urn:example:schema")
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assert again.value is got.value
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def test_custom_cache(self):
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schema = {"$schema": "https://json-schema.org/draft/2020-12/schema"}
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mapping = {
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"urn:example:1": dict(schema, foo=1),
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"urn:example:2": dict(schema, foo=2),
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"urn:example:3": dict(schema, foo=3),
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}
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resources = {
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uri: Resource.from_contents(contents)
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for uri, contents in mapping.items()
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}
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@to_cached_resource(cache=lru_cache(maxsize=2))
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def retrieve(uri):
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return json.dumps(mapping.pop(uri))
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registry = Registry(retrieve=retrieve)
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got = registry.get_or_retrieve("urn:example:1")
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assert got.value == resources["urn:example:1"]
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assert registry.get_or_retrieve("urn:example:1").value is got.value
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assert registry.get_or_retrieve("urn:example:1").value is got.value
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got = registry.get_or_retrieve("urn:example:2")
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assert got.value == resources["urn:example:2"]
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assert registry.get_or_retrieve("urn:example:2").value is got.value
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assert registry.get_or_retrieve("urn:example:2").value is got.value
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# This still succeeds, but evicts the first URI
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got = registry.get_or_retrieve("urn:example:3")
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assert got.value == resources["urn:example:3"]
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assert registry.get_or_retrieve("urn:example:3").value is got.value
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assert registry.get_or_retrieve("urn:example:3").value is got.value
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# And now this fails (as we popped the value out of `mapping`)
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with pytest.raises(exceptions.Unretrievable):
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registry.get_or_retrieve("urn:example:1")
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