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"""
JSON-LD Context Spec
"""
from functools import wraps
from pathlib import Path
from typing import Any, Dict
from rdflib.plugins.shared.jsonld import context, errors
from rdflib.plugins.shared.jsonld.context import Context
# exception utility (see also nose.tools.raises)
def _expect_exception(expected_error):
def _try_wrapper(f):
@wraps(f)
def _try():
try:
f()
assert e == expected_error
except Exception as e:
success = e == expected_error
else:
success = False
assert success, "Expected %r" % expected_error
return _try
return _try_wrapper
def test_create_context():
ctx = Context()
ctx.add_term("label", "http://example.org/ns/label")
term = ctx.terms.get("label")
assert term.name == "label"
assert ctx.find_term("http://example.org/ns/label") is term
def test_select_term_based_on_value_characteristics():
ctx = Context()
ctx.add_term("updated", "http://example.org/ns/updated")
ctx.add_term(
"updatedDate",
"http://example.org/ns/updated",
coercion="http://www.w3.org/2001/XMLSchema#date",
)
assert ctx.find_term("http://example.org/ns/updated").name == "updated"
assert (
ctx.find_term(
"http://example.org/ns/updated",
coercion="http://www.w3.org/2001/XMLSchema#date",
).name
== "updatedDate"
)
# ctx.find_term('http://example.org/ns/title_sv', language='sv')
# ctx.find_term('http://example.org/ns/authorList', container='@set')
# ctx.find_term('http://example.org/ns/creator', reverse=True)
def test_getting_keyword_values_from_nodes():
ctx = Context()
assert ctx.get_id({"@id": "urn:x:1"}) == "urn:x:1"
assert ctx.get_language({"@language": "en"}) == "en"
def test_parsing_a_context_expands_prefixes():
ctx = Context(
{
"@vocab": "http://example.org/ns/",
"x": "http://example.org/ns/",
"label": "x:label",
"x:updated": {"@type": "x:date"},
}
)
term = ctx.terms.get("label")
assert term.id == "http://example.org/ns/label"
term = ctx.terms.get("x:updated")
assert term.id == "http://example.org/ns/updated"
assert term.type == "http://example.org/ns/date"
# test_expanding_terms():
assert ctx.expand("term") == "http://example.org/ns/term"
assert ctx.expand("x:term") == "http://example.org/ns/term"
# test_shrinking_iris():
assert ctx.shrink_iri("http://example.org/ns/term") == "x:term"
assert ctx.to_symbol("http://example.org/ns/term") == "term"
def test_resolving_iris():
ctx = Context({"@base": "http://example.org/path/leaf"})
assert ctx.resolve("/") == "http://example.org/"
assert ctx.resolve("/trail") == "http://example.org/trail"
assert ctx.resolve("../") == "http://example.org/"
assert ctx.resolve("../../") == "http://example.org/"
def test_accessing_keyword_values_by_alias():
ctx = Context({"iri": "@id", "lang": "@language"})
assert ctx.get_id({"iri": "urn:x:1"}) == "urn:x:1"
assert ctx.get_language({"lang": "en"}) == "en"
# test_standard_keywords_still_work():
assert ctx.get_id({"@id": "urn:x:1"}) == "urn:x:1"
# test_representing_keywords_by_alias():
assert ctx.id_key == "iri"
assert ctx.lang_key == "lang"
def test_creating_a_subcontext():
ctx = Context()
ctx4 = ctx.subcontext({"lang": "@language"})
assert ctx4.get_language({"lang": "en"}) == "en"
def test_prefix_like_vocab():
ctx = Context({"@vocab": "ex:", "term": "ex:term"})
term = ctx.terms.get("term")
assert term.id == "ex:term"
# Mock external sources loading
SOURCES: Dict[str, Dict[str, Any]] = {}
_source_to_json = context.source_to_json
def _mock_source_loader(f):
@wraps(f)
def _wrapper():
try:
context.source_to_json = SOURCES.get
f()
finally:
context.source_to_json = _source_to_json
return _wrapper
@_mock_source_loader
def test_loading_contexts():
# Given context data:
source1 = "http://example.org/base.jsonld"
source2 = "http://example.org/context.jsonld"
SOURCES[source1] = {"@context": {"@vocab": "http://example.org/vocab/"}}
SOURCES[source2] = {"@context": [source1, {"n": "name"}]}
# Create a context:
ctx = Context(source2)
assert ctx.expand("n") == "http://example.org/vocab/name"
# Context can be a list:
ctx = Context([source2])
assert ctx.expand("n") == "http://example.org/vocab/name"
@_mock_source_loader
def test_use_base_in_local_context():
ctx = Context({"@base": "/local"})
assert ctx.base == "/local"
@_mock_source_loader
def test_override_base():
ctx = Context(
base="http://example.org/app/data/item", source={"@base": "http://example.org/"}
)
assert ctx.base == "http://example.org/"
@_mock_source_loader
def test_resolve_relative_base():
ctx = Context(base="http://example.org/app/data/item", source={"@base": "../"})
assert ctx.base == "http://example.org/app/"
assert ctx.resolve_iri("../other") == "http://example.org/other"
@_mock_source_loader
def test_set_null_base():
ctx = Context(base="http://example.org/app/data/item", source={"@base": None})
assert ctx.base is None
assert ctx.resolve_iri("../other") == "../other"
@_mock_source_loader
def test_ignore_base_remote_context():
ctx_url = "http://example.org/remote-base.jsonld"
SOURCES[ctx_url] = {"@context": {"@base": "/remote"}}
ctx = Context(ctx_url)
assert ctx.base is None
@_expect_exception(errors.RECURSIVE_CONTEXT_INCLUSION)
@_mock_source_loader
def test_recursive_context_inclusion_error():
ctx_url = "http://example.org/recursive.jsonld"
SOURCES[ctx_url] = {"@context": ctx_url}
ctx = Context(ctx_url)
@_expect_exception(errors.INVALID_REMOTE_CONTEXT)
@_mock_source_loader
def test_invalid_remote_context():
ctx_url = "http://example.org/recursive.jsonld"
SOURCES[ctx_url] = {"key": "value"}
ctx = Context(ctx_url)
def test_file_source(tmp_path: Path) -> None:
"""
A file URI source to `Context` gets processed correctly.
"""
file = tmp_path / "context.jsonld"
file.write_text(r"""{ "@context": { "ex": "http://example.com/" } }""")
ctx = Context(source=file.as_uri())
assert "http://example.com/" == ctx.terms["ex"].id
def test_dict_source(tmp_path: Path) -> None:
"""
A dictionary source to `Context` gets processed correctly.
"""
file = tmp_path / "context.jsonld"
file.write_text(r"""{ "@context": { "ex": "http://example.com/" } }""")
ctx = Context(source=[{"@context": file.as_uri()}])
assert "http://example.com/" == ctx.terms["ex"].id
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