Fixed Full Root scans for Virtual Codebase

Signed-off-by: Pratik Dey <pratikrocks.dey11@gmail.com>

Author: pratik0316

src/commoncode/resource.py

@@ -1511,7 +1511,7 @@ def _get_or_create_parent(self, path, parent_by_path):
         Note: the root path and root Resource must already be in `parent_by_path` or else this
         function does not work.
         """
-        parent_path = parent_directory(path).rstrip('/').rstrip('\\')
+        parent_path = parent_directory(path).rstrip('/').rstrip('\\').lstrip("/")
         existing_parent = parent_by_path.get(parent_path)
         if existing_parent:
             return existing_parent

tests/data/resource/virtual_codebase/path_full_root.json

@@ -0,0 +1,36 @@
+{
+    "scancode_notice": "Generated with ScanCode and provided on an \"AS IS\" BASIS, WITHOUT WARRANTIES\nOR CONDITIONS OF ANY KIND, either express or implied. No content created from\nScanCode should be considered or used as legal advice. Consult an Attorney\nfor any legal advice.\nScanCode is a free software code scanning tool from nexB Inc. and others.\nVisit https://github.com/nexB/scancode-toolkit/ for support and download.",
+    "scancode_version": "2.2.1.post12.6d07756e",
+    "scancode_options": {
+      "--info": true,
+      "--license-score": 0,
+      "--full-root": true,
+      "--format": "json-pp"
+    },
+    "files_count": 1,
+    "files": [
+      {
+        "path": "/Users/sesser/code/nexb/scancode-toolkit/samples/README",
+        "type": "file",
+        "name": "README",
+        "base_name": "README",
+        "extension": "",
+        "date": "2017-09-22",
+        "size": 236,
+        "sha1": "2e07e32c52d607204fad196052d70e3d18fb8636",
+        "md5": "effc6856ef85a9250fb1a470792b3f38",
+        "files_count": null,
+        "mime_type": "text/plain",
+        "file_type": "ASCII text",
+        "programming_language": null,
+        "is_binary": false,
+        "is_text": true,
+        "is_archive": false,
+        "is_media": false,
+        "is_source": false,
+        "is_script": false,
+        "scan_errors": []
+      }
+    ]
+  }
+  

tests/test_resource.py

@@ -1323,6 +1323,13 @@ def test_VirtualCodebase_create_from_multiple_scans(self):
         ]
         assert expected == results
 
+    def test_VirtualCodebase_scanning_full_root(self):
+        test_file = self.get_test_loc("resource/virtual_codebase/path_full_root.json")
+        codebase = VirtualCodebase(test_file)
+        resource = sorted(r for r in codebase.walk())[0]
+        assert resource.path == "/Users/sesser/code/nexb/scancode-toolkit/samples/README"
+        assert codebase.compute_counts()[0] == 1
+
 
 class TestResource(FileBasedTesting):
     test_data_dir = join(dirname(__file__), 'data')