test(language_scanner): use scan_file() and add unit tests for python_package_parser

Author: yashugarg

test/language_data/FAIL-PKG-INFO

@@ -0,0 +1,3 @@
+Metadata-Version: 2.1
+Name: cve-bin-tool
+Version: 3.1.1

test/language_data/PKG-INFO

@@ -0,0 +1,23 @@
+Metadata-Version: 2.1
+Name: zstandard
+Version: 0.18.0
+Summary: Zstandard bindings for Python
+Home-page: https://github.com/indygreg/python-zstandard
+Author: Gregory Szorc
+Author-email: [email protected]
+License: BSD
+Keywords: zstandard,zstd,compression
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Development Status :: 5 - Production/Stable
+Requires-Python: >=3.6
+License-File: LICENSE
+Requires-Dist: cffi (>=1.11) ; platform_python_implementation == "PyPy"
+Provides-Extra: cffi
+Requires-Dist: cffi (>=1.11) ; platform_python_implementation == "PyPy"

test/language_data/package.json renamed to test/language_data/fail-package-lock.json

@@ -5,6 +5,7 @@
 
 import pytest
 
+from cve_bin_tool.util import ProductInfo
 from cve_bin_tool.version_scanner import VersionScanner
 
 
@@ -28,43 +29,63 @@ def test_java_package(self, filename: str, product_name: str) -> None:
         scanner = VersionScanner()
         scanner.file_stack.append(filename)
         # Only expecting to get one product with a vendor in the database
-        for product in scanner.run_java_checker(filename):
+        for product in scanner.scan_file(filename):
             if product:
                 product_info, file_path = product
         assert product_info.product == product_name
         assert file_path == filename
 
-    @pytest.mark.parametrize("filename", ((str(TEST_FILE_PATH / "pom_fail.xml")),))
+    @pytest.mark.parametrize("filename", ((str(TEST_FILE_PATH / "fail_pom.xml")),))
     def test_java_package_none_found(self, filename: str) -> None:
         scanner = VersionScanner()
         scanner.file_stack.append(filename)
         product = None
         # Not expecting any product to match with a vendor in the database
-        for product in scanner.run_java_checker(filename):
+        for product in scanner.scan_file(filename):
             pass
         assert product is None
 
-    @pytest.mark.parametrize(
-        "filename", ((str(TEST_FILE_PATH / "package-lock1.json")),)
-    )
+    @pytest.mark.parametrize("filename", ((str(TEST_FILE_PATH / "package-lock.json")),))
     def test_javascript_package(self, filename: str) -> None:
         scanner = VersionScanner()
         scanner.file_stack.append(filename)
         found_product = []
-        for product in scanner.run_js_checker(filename):
+        for product in scanner.scan_file(filename):
             if product:
                 product_info, file_path = product
                 if product_info.product not in found_product:
                     found_product.append(product_info.product)
         assert found_product == self.JAVASCRIPT_PRODUCTS
         assert file_path == filename
 
-    @pytest.mark.parametrize("filename", ((str(TEST_FILE_PATH / "package.json")),))
+    @pytest.mark.parametrize(
+        "filename", ((str(TEST_FILE_PATH / "fail-package-lock.json")),)
+    )
     def test_javascript_package_none_found(self, filename: str) -> None:
         scanner = VersionScanner()
         scanner.file_stack.append(filename)
         product = None
         # Not expecting any product to match with a vendor in the database
-        for product in scanner.run_js_checker(filename):
+        for product in scanner.scan_file(filename):
             pass
         assert product is not None
+
+    @pytest.mark.parametrize("filename", ((str(TEST_FILE_PATH / "PKG-INFO")),))
+    def test_python_package(self, filename: str) -> None:
+        scanner = VersionScanner()
+        scanner.file_stack.append(filename)
+        for product in scanner.scan_file(filename):
+            if product:
+                product_info, file_path = product
+        assert product_info == ProductInfo("facebook", "zstandard", "0.18.0")
+        assert file_path == filename
+
+    @pytest.mark.parametrize("filename", ((str(TEST_FILE_PATH / "FAIL-PKG-INFO")),))
+    def test_python_package_none_found(self, filename: str) -> None:
+        scanner = VersionScanner()
+        scanner.file_stack.append(filename)
+        product = None
+        # Not expecting any product to match with a vendor in the database
+        for product in scanner.scan_file(filename):
+            pass
+        assert product is None