test: add invalid package to test language scanner (#4918)

Author: hai1337

test/language_data/invalid-package-lock.json

@@ -199,11 +199,26 @@ 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.scan_file(filename):
             pass
         assert product is not None
 
+    @pytest.mark.parametrize(
+        "filename", ((str(TEST_FILE_PATH / "invalid-package-lock.json")),)
+    )
+    def test_invalid_javascript_package(self, filename: str) -> None:
+        """Test an invalid package-lock.json file
+
+        The parser should gracefully handle invalid package-lock.json files.
+        """
+        scanner = VersionScanner()
+        scanner_output = scanner.scan_file(filename)
+
+        for product in scanner_output:
+            assert product is None
+
     @pytest.mark.parametrize(
         "filename",
         [