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Source code for galaxy_test.api.test_dataset_collections

import zipfile
from io import BytesIO
from typing import List
from urllib.parse import quote

from galaxy.util.unittest_utils import skip_if_github_down
from galaxy_test.base.api_asserts import assert_object_id_error
from galaxy_test.base.decorators import requires_new_user
from galaxy_test.base.populators import (
    DatasetCollectionPopulator,
    DatasetPopulator,
)
from ._framework import ApiTestCase


[docs]class TestDatasetCollectionsApi(ApiTestCase): dataset_populator: DatasetPopulator
[docs] def setUp(self): super().setUp() self.dataset_populator = DatasetPopulator(self.galaxy_interactor) self.dataset_collection_populator = DatasetCollectionPopulator(self.galaxy_interactor)
[docs] def test_create_pair_from_history(self): with self.dataset_populator.test_history(require_new=False) as history_id: payload = self.dataset_collection_populator.create_pair_payload( history_id, instance_type="history", ) create_response = self.dataset_populator.fetch(payload, wait=True) dataset_collection = self._check_create_response(create_response) returned_datasets = dataset_collection["elements"] assert len(returned_datasets) == 2, dataset_collection
[docs] def test_create_list_from_history(self): with self.dataset_populator.test_history(require_new=False) as history_id: element_identifiers = self.dataset_collection_populator.list_identifiers(history_id) payload = dict( instance_type="history", history_id=history_id, element_identifiers=element_identifiers, collection_type="list", ) create_response = self._post("dataset_collections", payload, json=True) dataset_collection = self._check_create_response(create_response) returned_datasets = dataset_collection["elements"] assert len(returned_datasets) == 3, dataset_collection
[docs] def test_create_list_of_existing_pairs(self): with self.dataset_populator.test_history(require_new=False) as history_id: pair_payload = self.dataset_collection_populator.create_pair_payload( history_id, instance_type="history", ) pair_create_response = self._post("tools/fetch", pair_payload, json=True) dataset_collection = self._check_create_response(pair_create_response) hdca_id = dataset_collection["id"] element_identifiers = [dict(name="test1", src="hdca", id=hdca_id)] payload = dict( instance_type="history", history_id=history_id, element_identifiers=element_identifiers, collection_type="list", ) create_response = self._post("dataset_collections", payload, json=True) dataset_collection = self._check_create_response(create_response) returned_collections = dataset_collection["elements"] assert len(returned_collections) == 1, dataset_collection
[docs] def test_create_list_of_new_pairs(self): with self.dataset_populator.test_history(require_new=False) as history_id: identifiers = self.dataset_collection_populator.nested_collection_identifiers(history_id, "list:paired") payload = dict( collection_type="list:paired", instance_type="history", history_id=history_id, name="a nested collection", element_identifiers=identifiers, ) create_response = self._post("dataset_collections", payload, json=True) dataset_collection = self._check_create_response(create_response) assert dataset_collection["collection_type"] == "list:paired" assert dataset_collection["name"] == "a nested collection" returned_collections = dataset_collection["elements"] assert len(returned_collections) == 1, dataset_collection pair_1_element = returned_collections[0] self._assert_has_keys(pair_1_element, "element_identifier", "element_index", "object") assert pair_1_element["element_identifier"] == "test_level_1", pair_1_element assert pair_1_element["element_index"] == 0, pair_1_element pair_1_object = pair_1_element["object"] self._assert_has_keys(pair_1_object, "collection_type", "elements", "element_count") assert pair_1_object["collection_type"] == "paired" assert pair_1_object["populated"] is True pair_elements = pair_1_object["elements"] assert len(pair_elements) == 2 pair_1_element_1 = pair_elements[0] assert pair_1_element_1["element_index"] == 0
[docs] def test_list_download(self): with self.dataset_populator.test_history(require_new=False) as history_id: fetch_response = self.dataset_collection_populator.create_list_in_history( history_id, direct_upload=True ).json() dataset_collection = self.dataset_collection_populator.wait_for_fetched_collection(fetch_response) returned_dce = dataset_collection["elements"] assert len(returned_dce) == 3, dataset_collection create_response = self._download_dataset_collection(history_id=history_id, hdca_id=dataset_collection["id"]) self._assert_status_code_is(create_response, 200) archive = zipfile.ZipFile(BytesIO(create_response.content)) namelist = archive.namelist() assert len(namelist) == 3, f"Expected 3 elements in [{namelist}]" collection_name = dataset_collection["name"] for element, zip_path in zip(returned_dce, namelist): assert f"{collection_name}/{element['element_identifier']}.{element['object']['file_ext']}" == zip_path
[docs] def test_pair_download(self): with self.dataset_populator.test_history(require_new=False) as history_id: fetch_response = self.dataset_collection_populator.create_pair_in_history( history_id, direct_upload=True ).json() dataset_collection = self.dataset_collection_populator.wait_for_fetched_collection(fetch_response) returned_dce = dataset_collection["elements"] assert len(returned_dce) == 2, dataset_collection hdca_id = dataset_collection["id"] create_response = self._download_dataset_collection(history_id=history_id, hdca_id=hdca_id) self._assert_status_code_is(create_response, 200) archive = zipfile.ZipFile(BytesIO(create_response.content)) namelist = archive.namelist() assert len(namelist) == 2, f"Expected 2 elements in [{namelist}]" collection_name = dataset_collection["name"] for element, zip_path in zip(returned_dce, namelist): assert f"{collection_name}/{element['element_identifier']}.{element['object']['file_ext']}" == zip_path
[docs] def test_list_pair_download(self): with self.dataset_populator.test_history(require_new=False) as history_id: fetch_response = self.dataset_collection_populator.create_list_of_pairs_in_history(history_id).json() dataset_collection = self.dataset_collection_populator.wait_for_fetched_collection(fetch_response) returned_dce = dataset_collection["elements"] assert len(returned_dce) == 1, dataset_collection list_collection_name = dataset_collection["name"] pair = returned_dce[0] create_response = self._download_dataset_collection(history_id=history_id, hdca_id=dataset_collection["id"]) self._assert_status_code_is(create_response, 200) archive = zipfile.ZipFile(BytesIO(create_response.content)) namelist = archive.namelist() assert len(namelist) == 2, f"Expected 2 elements in [{namelist}]" pair_collection_name = pair["element_identifier"] for element, zip_path in zip(pair["object"]["elements"], namelist): assert ( f"{list_collection_name}/{pair_collection_name}/{element['element_identifier']}.{element['object']['file_ext']}" == zip_path )
[docs] def test_list_list_download(self): with self.dataset_populator.test_history(require_new=False) as history_id: dataset_collection = self.dataset_collection_populator.create_list_of_list_in_history( history_id, wait=True ).json() returned_dce = dataset_collection["elements"] assert len(returned_dce) == 1, dataset_collection create_response = self._download_dataset_collection(history_id=history_id, hdca_id=dataset_collection["id"]) self._assert_status_code_is(create_response, 200) archive = zipfile.ZipFile(BytesIO(create_response.content)) namelist = archive.namelist() assert len(namelist) == 3, f"Expected 3 elements in [{namelist}]"
[docs] def test_list_list_list_download(self): with self.dataset_populator.test_history(require_new=False) as history_id: dataset_collection = self.dataset_collection_populator.create_list_of_list_in_history( history_id, collection_type="list:list:list", wait=True, ).json() returned_dce = dataset_collection["elements"] assert len(returned_dce) == 1, dataset_collection create_response = self._download_dataset_collection(history_id=history_id, hdca_id=dataset_collection["id"]) self._assert_status_code_is(create_response, 200) archive = zipfile.ZipFile(BytesIO(create_response.content)) namelist = archive.namelist() assert len(namelist) == 3, f"Expected 3 elements in [{namelist}]"
[docs] def test_download_non_english_characters(self): with self.dataset_populator.test_history() as history_id: name = "دیتاست" payload = self.dataset_collection_populator.create_list_payload(history_id, name=name) hdca_id = self.dataset_populator.fetch(payload, wait=True).json()["outputs"][0]["id"] create_response = self._download_dataset_collection(history_id=history_id, hdca_id=hdca_id) self._assert_status_code_is(create_response, 200) assert quote(name, safe="") in create_response.headers["Content-Disposition"]
[docs] @requires_new_user def test_hda_security(self): with self.dataset_populator.test_history(require_new=False) as history_id: element_identifiers = self.dataset_collection_populator.pair_identifiers(history_id, wait=True) self.dataset_populator.make_private(history_id, element_identifiers[0]["id"]) with self._different_user(): history_id = self.dataset_populator.new_history() payload = dict( instance_type="history", history_id=history_id, element_identifiers=element_identifiers, collection_type="paired", ) create_response = self._post("dataset_collections", payload, json=True) self._assert_status_code_is(create_response, 403)
[docs] def test_dataset_collection_element_security(self): with self.dataset_populator.test_history(require_new=False) as history_id: dataset_collection = self.dataset_collection_populator.create_list_of_list_in_history( history_id, collection_type="list:list:list", wait=True, ).json() first_element = dataset_collection["elements"][0] assert first_element["model_class"] == "DatasetCollectionElement" assert first_element["element_type"] == "dataset_collection" first_element_url = f"/api/dataset_collection_element/{first_element['id']}" # Make one dataset private to check that access permissions are respected first_dataset_element = first_element["object"]["elements"][0]["object"]["elements"][0] self.dataset_populator.make_private(history_id, first_dataset_element["object"]["id"]) with self._different_user(): assert self._get(first_element_url).status_code == 403 collection_dce_response = self._get(first_element_url) collection_dce_response.raise_for_status() collection_dce = collection_dce_response.json() assert collection_dce["model_class"] == "DatasetCollectionElement" assert collection_dce["element_type"] == "dataset_collection" first_dataset_element = first_element["object"]["elements"][0]["object"]["elements"][0] assert first_dataset_element["model_class"] == "DatasetCollectionElement" assert first_dataset_element["element_type"] == "hda" first_dataset_element_url = f"/api/dataset_collection_element/{first_dataset_element['id']}" with self._different_user(): assert self._get(first_dataset_element_url).status_code == 403 dataset_dce_response = self._get(first_dataset_element_url) dataset_dce_response.raise_for_status() dataset_dce = dataset_dce_response.json() assert dataset_dce["model_class"] == "DatasetCollectionElement" assert dataset_dce["element_type"] == "hda" assert dataset_dce["object"]["model_class"] == "HistoryDatasetAssociation"
[docs] def test_enforces_unique_names(self): with self.dataset_populator.test_history(require_new=False) as history_id: element_identifiers = self.dataset_collection_populator.list_identifiers(history_id) element_identifiers[2]["name"] = element_identifiers[0]["name"] payload = dict( instance_type="history", history_id=history_id, element_identifiers=element_identifiers, collection_type="list", ) create_response = self._post("dataset_collections", payload, json=True) self._assert_status_code_is(create_response, 400)
[docs] def test_upload_collection(self): with self.dataset_populator.test_history(require_new=False) as history_id: elements = [ { "src": "files", "dbkey": "hg19", "info": "my cool bed", "tags": ["name:data1", "group:condition:treated", "machine:illumina"], } ] targets = [ { "destination": {"type": "hdca"}, "elements": elements, "collection_type": "list", "name": "Test upload", "tags": ["name:collection1"], } ] payload = { "history_id": history_id, "targets": targets, "__files": {"files_0|file_data": open(self.test_data_resolver.get_filename("4.bed"))}, } self.dataset_populator.fetch(payload) hdca = self._assert_one_collection_created_in_history(history_id) assert hdca["name"] == "Test upload" hdca_tags = hdca["tags"] assert len(hdca_tags) == 1 assert "name:collection1" in hdca_tags assert len(hdca["elements"]) == 1, hdca element0 = hdca["elements"][0] assert element0["element_identifier"] == "4.bed" dataset0 = element0["object"] assert dataset0["file_size"] == 61 dataset_tags = dataset0["tags"] assert len(dataset_tags) == 3, dataset0
[docs] def test_upload_nested(self): with self.dataset_populator.test_history(require_new=False) as history_id: elements = [{"name": "samp1", "elements": [{"src": "files", "dbkey": "hg19", "info": "my cool bed"}]}] targets = [ { "destination": {"type": "hdca"}, "elements": elements, "collection_type": "list:list", "name": "Test upload", } ] payload = { "history_id": history_id, "targets": targets, "__files": {"files_0|file_data": open(self.test_data_resolver.get_filename("4.bed"))}, } self.dataset_populator.fetch(payload) hdca = self._assert_one_collection_created_in_history(history_id) assert hdca["name"] == "Test upload" assert len(hdca["elements"]) == 1, hdca element0 = hdca["elements"][0] assert element0["element_identifier"] == "samp1"
[docs] @skip_if_github_down def test_upload_collection_from_url(self): with self.dataset_populator.test_history(require_new=False) as history_id: elements = [ { "src": "url", "url": "https://raw.githubusercontent.com/galaxyproject/galaxy/dev/test-data/4.bed", "info": "my cool bed", } ] targets = [ { "destination": {"type": "hdca"}, "elements": elements, "collection_type": "list", } ] payload = { "history_id": history_id, "targets": targets, } self.dataset_populator.fetch(payload) hdca = self._assert_one_collection_created_in_history(history_id) assert len(hdca["elements"]) == 1, hdca element0 = hdca["elements"][0] assert element0["element_identifier"] == "4.bed" assert element0["object"]["file_size"] == 61
[docs] def test_upload_collection_deferred(self): with self.dataset_populator.test_history(require_new=False) as history_id: elements = [ { "src": "url", "url": "https://raw.githubusercontent.com/galaxyproject/galaxy/dev/test-data/4.bed", "info": "my cool bed", "deferred": True, } ] targets = [ { "destination": {"type": "hdca"}, "elements": elements, "collection_type": "list", } ] payload = { "history_id": history_id, "targets": targets, } self.dataset_populator.fetch(payload) hdca = self._assert_one_collection_created_in_history(history_id) assert len(hdca["elements"]) == 1, hdca element0 = hdca["elements"][0] assert element0["element_identifier"] == "4.bed" object0 = element0["object"] assert object0["state"] == "deferred"
[docs] @skip_if_github_down def test_upload_collection_failed_expansion_url(self): with self.dataset_populator.test_history(require_new=False) as history_id: targets = [ { "destination": {"type": "hdca"}, "elements_from": "bagit", "collection_type": "list", "src": "url", "url": "https://raw.githubusercontent.com/galaxyproject/galaxy/dev/test-data/4.bed", } ] payload = { "history_id": history_id, "targets": targets, } self.dataset_populator.fetch(payload, assert_ok=False, wait=True) hdca = self._assert_one_collection_created_in_history(history_id) assert hdca["populated"] is False assert "bagit.txt" in hdca["populated_state_message"], hdca
def _assert_one_collection_created_in_history(self, history_id: str): contents_response = self._get(f"histories/{history_id}/contents/dataset_collections") self._assert_status_code_is(contents_response, 200) contents = contents_response.json() assert len(contents) == 1 hdca = contents[0] assert hdca["history_content_type"] == "dataset_collection" hdca_id = hdca["id"] collection_response = self._get(f"histories/{history_id}/contents/dataset_collections/{hdca_id}") self._assert_status_code_is(collection_response, 200) return collection_response.json() def _check_create_response(self, create_response): self._assert_status_code_is(create_response, 200) dataset_collection = create_response.json() if "output_collections" in dataset_collection: # fetch data response, we'll have to check the final response dataset_collection = dataset_collection["output_collections"][0] dataset_collection = self._get(f"dataset_collections/{dataset_collection['id']}").json() self._assert_has_keys(dataset_collection, "elements", "url", "name", "collection_type", "element_count") return dataset_collection def _download_dataset_collection(self, history_id: str, hdca_id: str): return self._get(f"histories/{history_id}/contents/dataset_collections/{hdca_id}/download")
[docs] @requires_new_user def test_collection_contents_security(self, history_id): # request contents on an hdca that doesn't belong to user hdca, contents_url = self._create_collection_contents_pair(history_id) with self._different_user(): contents_response = self._get(contents_url) self._assert_status_code_is(contents_response, 403)
[docs] @requires_new_user def test_published_collection_contents_accessible(self, history_id): # request contents on an hdca that is in a published history hdca, contents_url = self._create_collection_contents_pair(history_id) with self._different_user(): contents_response = self._get(contents_url) self._assert_status_code_is(contents_response, 403) self.dataset_populator.make_public(history_id) with self._different_user(): contents_response = self._get(contents_url) self._assert_status_code_is(contents_response, 200)
[docs] def test_collection_contents_invalid_collection(self, history_id): # request an invalid collection from a valid hdca, should get 404 hdca, contents_url = self._create_collection_contents_pair(history_id) response = self._get(contents_url) self._assert_status_code_is(response, 200) fake_collection_id = "5d7db0757a2eb7ef" fake_contents_url = f"/api/dataset_collections/{hdca['id']}/contents/{fake_collection_id}" error_response = self._get(fake_contents_url) assert_object_id_error(error_response)
[docs] def test_show_dataset_collection(self, history_id): fetch_response = self.dataset_collection_populator.create_list_in_history(history_id, direct_upload=True).json() dataset_collection = self.dataset_collection_populator.wait_for_fetched_collection(fetch_response) returned_dce = dataset_collection["elements"] assert len(returned_dce) == 3, dataset_collection hdca_id = dataset_collection["id"] dataset_collection_url = f"/api/dataset_collections/{hdca_id}" dataset_collection = self._get(dataset_collection_url).json() assert dataset_collection["id"] == hdca_id assert dataset_collection["collection_type"] == "list"
[docs] def test_show_dataset_collection_contents(self, history_id): # Get contents_url from history contents, use it to show the first level # of collection contents in the created HDCA, then use it again to drill # down into the nested collection contents hdca = self.dataset_collection_populator.create_list_of_list_in_history(history_id, wait=True).json() root_contents_url = self._get_contents_url_for_hdca(history_id, hdca) # check root contents for this collection root_contents = self._get(root_contents_url).json() assert len(root_contents) == len(hdca["elements"]) self._compare_collection_contents_elements(root_contents, hdca["elements"]) # drill down, retrieve nested collection contents assert "object" in root_contents[0] assert "contents_url" in root_contents[0]["object"] assert root_contents[0]["object"]["element_count"] == 3 assert root_contents[0]["object"]["populated"] drill_contents_url = root_contents[0]["object"]["contents_url"] drill_contents = self._get(drill_contents_url).json() assert len(drill_contents) == len(hdca["elements"][0]["object"]["elements"]) self._compare_collection_contents_elements(drill_contents, hdca["elements"][0]["object"]["elements"])
[docs] def test_collection_contents_limit_offset(self, history_id): # check limit/offset params for collection contents endpoint hdca, root_contents_url = self._create_collection_contents_pair(history_id) # check limit limited_contents = self._get(f"{root_contents_url}?limit=1").json() assert len(limited_contents) == 1 assert limited_contents[0]["element_index"] == 0 # check offset offset_contents = self._get(f"{root_contents_url}?offset=1").json() assert len(offset_contents) == 1 assert offset_contents[0]["element_index"] == 1
[docs] def test_collection_contents_empty_root(self, history_id): create_response = self.dataset_collection_populator.create_list_in_history( history_id, contents=[], wait=True ).json() hdca = create_response["output_collections"][0] assert hdca["elements"] == [] root_contents_url = hdca["contents_url"] response = self._get(root_contents_url) response.raise_for_status() assert response.json() == []
[docs] def test_get_suitable_converters_single_datatype(self, history_id): response = self.dataset_collection_populator.upload_collection( history_id, "list:paired", elements=[ { "name": "test0", "elements": [ {"src": "pasted", "paste_content": "123\n", "name": "forward", "ext": "bed"}, {"src": "pasted", "paste_content": "456\n", "name": "reverse", "ext": "bed"}, ], }, { "name": "test1", "elements": [ {"src": "pasted", "paste_content": "789\n", "name": "forward", "ext": "bed"}, {"src": "pasted", "paste_content": "0ab\n", "name": "reverse", "ext": "bed"}, ], }, ], wait=True, ) self._assert_status_code_is(response, 200) hdca_list_id = response.json()["outputs"][0]["id"] converters = self._get("dataset_collections/" + hdca_list_id + "/suitable_converters") expected = [ # This list is subject to change, but it's unlikely we'll be removing converters "CONVERTER_bed_to_fli_0", "CONVERTER_bed_gff_or_vcf_to_bigwig_0", "CONVERTER_bed_to_gff_0", "CONVERTER_interval_to_bgzip_0", "tabular_to_csv", "CONVERTER_interval_to_bed6_0", "CONVERTER_interval_to_bedstrict_0", "CONVERTER_interval_to_tabix_0", "CONVERTER_interval_to_bed12_0", ] actual = [] for converter in converters.json(): actual.append(converter["tool_id"]) missing_expected_converters = set(expected) - set(actual) assert ( not missing_expected_converters ), f"Expected converter(s) {', '.join(missing_expected_converters)} missing from response"
[docs] def test_get_suitable_converters_different_datatypes_matches(self, history_id): response = self.dataset_collection_populator.upload_collection( history_id, "list:paired", elements=[ { "name": "test0", "elements": [ {"src": "pasted", "paste_content": "123\n", "name": "forward", "ext": "bed"}, {"src": "pasted", "paste_content": "456\n", "name": "reverse", "ext": "bed"}, ], }, { "name": "test1", "elements": [ {"src": "pasted", "paste_content": "789\n", "name": "forward", "ext": "tabular"}, {"src": "pasted", "paste_content": "0ab\n", "name": "reverse", "ext": "tabular"}, ], }, ], wait=True, ) self._assert_status_code_is(response, 200) hdca_list_id = response.json()["outputs"][0]["id"] converters = self._get("dataset_collections/" + hdca_list_id + "/suitable_converters") expected = "tabular_to_csv" actual = [] for converter in converters.json(): actual.append(converter["tool_id"]) assert expected in actual
[docs] def test_get_suitable_converters_different_datatypes_no_matches(self, history_id): response = self.dataset_collection_populator.upload_collection( history_id, "list:paired", elements=[ { "name": "test0", "elements": [ {"src": "pasted", "paste_content": "123\n", "name": "forward", "ext": "bed"}, {"src": "pasted", "paste_content": "456\n", "name": "reverse", "ext": "bed"}, ], }, { "name": "test1", "elements": [ {"src": "pasted", "paste_content": "789\n", "name": "forward", "ext": "fasta"}, {"src": "pasted", "paste_content": "0ab\n", "name": "reverse", "ext": "fasta"}, ], }, ], wait=True, ) self._assert_status_code_is(response, 200) hdca_list_id = response.json()["outputs"][0]["id"] converters = self._get("dataset_collections/" + hdca_list_id + "/suitable_converters") actual: List[str] = [] for converter in converters.json(): actual.append(converter["tool_id"]) assert actual == []
[docs] def test_collection_tools_tag_propagation(self, history_id): elements = [{"src": "files", "tags": ["name:element_tag"]}] targets = [ { "destination": {"type": "hdca"}, "elements": elements, "collection_type": "list", "name": "Test collection", "tags": ["name:collection_tag"], } ] payload = { "history_id": history_id, "targets": targets, "__files": {"files_0|file_data": open(self.test_data_resolver.get_filename("4.bed"))}, } hdca_id = self.dataset_populator.fetch(payload).json()["output_collections"][0]["id"] inputs = { "input": {"batch": False, "src": "hdca", "id": hdca_id}, } payload = self.dataset_populator.run_tool_payload( tool_id="__FILTER_FAILED_DATASETS__", inputs=inputs, history_id=history_id, input_format="legacy", ) response = self._post("tools", payload).json() self.dataset_populator.wait_for_history(history_id, assert_ok=False) output_collection = response["output_collections"][0] # collection should not inherit tags from input collection elements, only parent collection assert output_collection["tags"] == ["name:collection_tag"] element = output_collection["elements"][0] # new element hda should have tags copied from old hda assert element["object"]["tags"] == ["name:element_tag"]
def _compare_collection_contents_elements(self, contents_elements, hdca_elements): # compare collection api results to existing hdca element contents fields = ["element_identifier", "element_index", "element_type", "id", "model_class"] for content_element, hdca_element in zip(contents_elements, hdca_elements): for f in fields: assert content_element[f] == hdca_element[f] def _create_collection_contents_pair(self, history_id: str): # Create a simple collection, return hdca and contents_url payload = self.dataset_collection_populator.create_pair_payload(history_id, instance_type="history") create_response = self.dataset_populator.fetch(payload=payload, wait=True) hdca = self._check_create_response(create_response) root_contents_url = self._get_contents_url_for_hdca(history_id, hdca) return hdca, root_contents_url def _get_contents_url_for_hdca(self, history_id: str, hdca): # look up the history contents using optional serialization key history_contents_url = f"histories/{history_id}/contents?v=dev&view=summary&keys=contents_url" json = self._get(history_contents_url).json() # filter out the collection we just made id = hdca.id # make sure the contents_url appears def find_hdca(c): return c["history_content_type"] == "dataset_collection" and c["id"] == hdca["id"] matches = list(filter(find_hdca, json)) assert len(matches) == 1 assert "contents_url" in matches[0] return matches[0]["contents_url"]