npm: more tests for alias in yarn.lock v1

An assert in the code was making aliases using `@` fail.

Signed-off-by: Adrien Schildknecht <[email protected]>

src/packagedcode/npm.py

@@ -623,11 +623,13 @@ def parse(cls, location):
                 elif not line.startswith(' ') and stripped.endswith(':'):
                     # the first line of a dependency has the name and requirements
                     # "@babel/core@^7.1.0", "@babel/core@^7.3.4":
+                    # For aliases: "@alias@npm:@package@^12":
                     requirements = stripped.strip(':').split(', ')
                     requirements = [r.strip().strip("\"'") for r in requirements]
                     for req in requirements:
                         if req.startswith('@'):
-                            assert req.count('@') == 2
+                            # 2 = package, 4 = alias
+                            assert req.count('@') in [2, 4]
 
                         ns_name, _, constraint = req.rpartition('@')
                         ns, _ , name = ns_name.rpartition('/')

tests/packagedcode/data/npm/yarn-lock/v1-complex/yarn.lock

@@ -34,3 +34,11 @@
     "@react-spring/animated" "9.7.3"
     "@react-spring/core" "9.7.3"
     "@react-spring/shared" "9.7.3"
+
+"@testing-library/react-12@npm:@testing-library/react@^12":
+  version "12.1.2"
+  resolved "https://registry.yarnpkg.com/@testing-library/react/-/react-12.1.2.tgz#f1bc9a45943461fa2a598bb4597df1ae044cfc76"
+  integrity sha512-ihQiEOklNyHIpo2Y8FREkyD1QAea054U0MVbwH1m8N9TxeFz+KoJ9LkqoKqJlzx2JDm56DVwaJ1r36JYxZM05g==
+  dependencies:
+    "@babel/runtime" "^7.12.5"
+    "@testing-library/dom" "^8.0.0"

tests/packagedcode/data/npm/yarn-lock/v1-complex/yarn.lock-expected

@@ -333,6 +333,78 @@
           "purl": "pkg:npm/%40react-spring/[email protected]"
         },
         "extra_data": {}
+      },
+      {
+        "purl": "pkg:npm/%40testing-library/[email protected]",
+        "extracted_requirement": "^12",
+        "scope": "dependencies",
+        "is_runtime": true,
+        "is_optional": false,
+        "is_resolved": true,
+        "resolved_package": {
+          "type": "npm",
+          "namespace": "@testing-library",
+          "name": "react",
+          "version": "12.1.2",
+          "qualifiers": {},
+          "subpath": null,
+          "primary_language": "JavaScript",
+          "description": null,
+          "release_date": null,
+          "parties": [],
+          "keywords": [],
+          "homepage_url": null,
+          "download_url": "https://registry.yarnpkg.com/@testing-library/react/-/react-12.1.2.tgz",
+          "size": null,
+          "sha1": "f1bc9a45943461fa2a598bb4597df1ae044cfc76",
+          "md5": null,
+          "sha256": null,
+          "sha512": "8a142210e9253721c8a68d98f054449320f540079ad39e14d0c55bc07d66f0df53c5e173f8aa09f4b92aa0aa89973c762439b9e83570689d6bdfa258c59334e6",
+          "bug_tracking_url": null,
+          "code_view_url": null,
+          "vcs_url": null,
+          "copyright": null,
+          "holder": null,
+          "declared_license_expression": null,
+          "declared_license_expression_spdx": null,
+          "license_detections": [],
+          "other_license_expression": null,
+          "other_license_expression_spdx": null,
+          "other_license_detections": [],
+          "extracted_license_statement": null,
+          "notice_text": null,
+          "source_packages": [],
+          "file_references": [],
+          "extra_data": {},
+          "dependencies": [
+            {
+              "purl": "pkg:npm/%22%40babel/runtime%22",
+              "extracted_requirement": "^7.12.5",
+              "scope": "dependencies",
+              "is_runtime": true,
+              "is_optional": false,
+              "is_resolved": false,
+              "resolved_package": {},
+              "extra_data": {}
+            },
+            {
+              "purl": "pkg:npm/%22%40testing-library/dom%22",
+              "extracted_requirement": "^8.0.0",
+              "scope": "dependencies",
+              "is_runtime": true,
+              "is_optional": false,
+              "is_resolved": false,
+              "resolved_package": {},
+              "extra_data": {}
+            }
+          ],
+          "repository_homepage_url": "https://www.npmjs.com/package/@testing-library/react",
+          "repository_download_url": "https://registry.npmjs.org/@testing-library/react/-/react-12.1.2.tgz",
+          "api_data_url": "https://registry.npmjs.org/@testing-library%2freact/12.1.2",
+          "datasource_id": "yarn_lock_v1",
+          "purl": "pkg:npm/%40testing-library/[email protected]"
+        },
+        "extra_data": {}
       }
     ],
     "repository_homepage_url": null,