Add dummy isolation provider to CLI

When enabled, the conversion part does nothing but print some simulated
output. This can be useful for testing non-conversion code (e.g. GUI).

Activated with the hidden flag --unsafe-dummy-conversion.

dangerzone/cli.py

@@ -33,6 +33,9 @@ def print_header(s: str) -> None:
     flag_value=True,
     help=f"Archives the unsafe version in a subdirectory named '{ARCHIVE_SUBDIR}'",
 )
+@click.option(
+    "--unsafe-dummy-conversion", "dummy_conversion", flag_value=True, hidden=True
+)
 @click.argument(
     "filenames",
     required=True,
@@ -47,9 +50,14 @@ def cli_main(
     ocr_lang: Optional[str],
     filenames: List[str],
     archive: bool,
+    dummy_conversion: bool,
 ) -> None:
     setup_logging()
-    dangerzone = DangerzoneCore()
+
+    if getattr(sys, "dangerzone_dev", False) and dummy_conversion:
+        dangerzone = DangerzoneCore(Dummy())
+    else:
+        dangerzone = DangerzoneCore(Container())
 
     display_banner()
     if len(filenames) == 1 and output_filename:

dangerzone/gui/logic.py

@@ -13,7 +13,7 @@ from PySide2 import QtCore, QtGui, QtWidgets
 if platform.system() == "Linux":
     from xdg.DesktopEntry import DesktopEntry
 
-from ..isolation_provider.base import IsolationProvider
+from ..isolation_provider.container import Container
 from ..logic import DangerzoneCore
 from ..settings import Settings
 from ..util import get_resource_path
@@ -27,7 +27,7 @@ class DangerzoneGui(DangerzoneCore):
     """
 
     def __init__(self, app: QtWidgets.QApplication) -> None:
-        super().__init__()
+        super().__init__(isolation_provider=Container())
 
         # Qt app
         self.app = app

dangerzone/logic.py

@@ -12,9 +12,9 @@ from typing import Callable, List, Optional
 import appdirs
 import colorama
 
-from . import errors, isolation_provider
+from . import errors
 from .document import Document
-from .isolation_provider.container import Container
+from .isolation_provider.base import IsolationProvider
 from .settings import Settings
 from .util import get_resource_path
 
@@ -26,7 +26,7 @@ class DangerzoneCore(object):
     Singleton of shared state / functionality throughout the app
     """
 
-    def __init__(self) -> None:
+    def __init__(self, isolation_provider: IsolationProvider) -> None:
         # Initialize terminal colors
         colorama.init(autoreset=True)
 
@@ -42,7 +42,7 @@ class DangerzoneCore(object):
 
         self.documents: List[Document] = []
 
-        self.isolation_provider = Container()
+        self.isolation_provider = isolation_provider
 
     def add_document_from_filename(
         self,

tests/test_cli.py

@@ -263,6 +263,21 @@ class TestCliConversion(TestCliBasic):
         assert os.path.exists(archived_doc_path)
         assert os.path.exists(safe_doc_path)
 
+    def test_dummy_conversion(self, tmp_path: Path) -> None:
+        result = self.run_cli([self.sample_doc, "--unsafe-dummy-conversion"])
+        result.assert_success()
+
+    def test_dummy_conversion_bulk(self, tmp_path: Path) -> None:
+        filenames = ["1.pdf", "2.pdf", "3.pdf"]
+        file_paths = []
+        for filename in filenames:
+            doc_path = str(tmp_path / filename)
+            shutil.copyfile(self.sample_doc, doc_path)
+            file_paths.append(doc_path)
+
+        result = self.run_cli(["--unsafe-dummy-conversion", *file_paths])
+        result.assert_success()
+
 
 class TestSecurity(TestCli):
     def test_suspicious_double_dash_file(self, tmp_path: Path) -> None: