use pytest-qt to test actual export process

src/__init__.py

@@ -3,7 +3,7 @@
 import logging
 
 
-__version__ = '2.0.0-b2'
+__version__ = '2.0.0'
 
 
 class Logger(logging.getLoggerClass()):

src/tests/test_commandline_export.py

@@ -0,0 +1,30 @@
+import sys
+import os
+import tempfile
+from ..command import Command
+from . import getTestDataPath
+from pytestqt import qtbot
+
+
+def test_commandline_classic_export(qtbot):
+    '''Run Qt event loop and create a video in the system /tmp or /temp'''
+    soundFile = getTestDataPath("test.ogg")
+    outputDir = tempfile.mkdtemp(prefix="avp-test-")
+    outputFilename = os.path.join(outputDir, "output.mp4")
+    sys.argv = ['', '-c', '0', 'classic', '-i', soundFile, '-o', outputFilename]
+
+    command = Command()
+    command.quit = lambda _: None
+    command.parseArgs()
+    # Command object now has a video_thread Worker which is exporting the video
+
+    with qtbot.waitSignal(command.worker.videoCreated, timeout=10000):
+        '''
+        Wait until videoCreated is emitted by the video_thread Worker
+        or until 10 second timeout has passed
+        '''
+        sys.__stdout__.write(f"Test Video created at {outputFilename}")
+
+    assert os.path.exists(outputFilename)
+    # output video should be at least 200kb
+    assert os.path.getsize(outputFilename) > 200000