internal API: ensure, that ExtractConfig.extract_root is an absolute path

ExtractConfig.extract_root must be an absolute path, as a relative path would
result in a wrong, very flat extraction output layout.

Author: e3krisztian

tests/test_processing.py

@@ -154,19 +154,26 @@ def test_calculate_entropy_no_exception(path: Path, draw_plot: bool):
 
 
 @pytest.mark.parametrize(
-    "extract_root, path, extract_dir_prefix",
+    "extract_root, path, result",
     [
-        ("/extract", "firmware", "firmware"),
-        ("/extract", "relative/firmware", "firmware"),
-        ("/extract", "/extract/dir/firmware", "dir/firmware"),
-        ("/extract/dir", "/extract/dir/firmware", "firmware"),
-        ("/extract", "/some/place/else/firmware", "firmware"),
+        ("/extract", "firmware", "/extract/firmware_extract"),
+        ("/extract", "relative/firmware", "/extract/firmware_extract"),
+        ("/extract", "/extract/dir/firmware", "/extract/dir/firmware_extract"),
+        (
+            "/extract/dir",
+            "/extract/dir/firmware",
+            "/extract/dir/firmware_extract",
+        ),
+        ("/extract", "/some/place/else/firmware", "/extract/firmware_extract"),
+        (
+            "extract",
+            "/some/place/else/firmware",
+            str(Path(".").resolve() / "extract/firmware_extract"),
+        ),
     ],
 )
 def test_ExtractionConfig_get_extract_dir_for(
-    extract_root: str, path: str, extract_dir_prefix: str
+    extract_root: str, path: str, result: str
 ):
     cfg = ExtractionConfig(extract_root=Path(extract_root), entropy_depth=0)
-    assert cfg.get_extract_dir_for(Path(path)) == (
-        cfg.extract_root / Path(extract_dir_prefix + cfg.extract_suffix)
-    )
+    assert cfg.get_extract_dir_for(Path(path)) == Path(result)

unblob/processing.py

@@ -56,7 +56,7 @@
 
 @attr.define(kw_only=True)
 class ExtractionConfig:
-    extract_root: Path
+    extract_root: Path = attr.field(converter=lambda value: value.resolve())
     force_extract: bool = False
     entropy_depth: int
     entropy_plot: bool = False