Add test for launching corrscope with master audio disabled

tests/conftest.py

@@ -1,3 +1,9 @@
+"""
+Integration tests found in:
+- test_cli.py
+- test_output.py
+"""
+
 import os
 import subprocess
 from typing import TYPE_CHECKING

tests/test_cli.py

@@ -1,3 +1,7 @@
+"""
+- Test command-line parsing and Config generation.
+- Integration tests (see conftest.py).
+"""
 import shlex
 from os.path import abspath
 from pathlib import Path
@@ -11,8 +15,8 @@ import corrscope.channel
 from corrscope import cli
 from corrscope.cli import YAML_NAME
 from corrscope.config import yaml
+from corrscope.corrscope import Arguments, Config, CorrScope
 from corrscope.outputs import FFmpegOutputConfig
-from corrscope.corrscope import Config, CorrScope, Arguments
 from corrscope.util import pushd
 
 if TYPE_CHECKING:
@@ -105,6 +109,9 @@ def test_write_dir(mocker):
     assert outpath.parent / cfg.master_audio == audio_path
 
 
+# Integration tests
+
+
 @pytest.mark.usefixtures("Popen")
 def test_load_yaml_another_dir(mocker, Popen):
     """ YAML file located in `another/dir` should resolve `master_audio`, `channels[].
@@ -142,6 +149,3 @@ def test_load_yaml_another_dir(mocker, Popen):
     argv = args[0]
     assert argv[-1] == mp4_abs
     assert f"-i {wav_abs}" in " ".join(argv)
-
-
-# TODO integration test without --audio

tests/test_output.py

@@ -208,3 +208,21 @@ def test_render_subfps_non_integer(mocker: "pytest_mock.MockFixture"):
 
 class DummyException(Exception):
     pass
+
+
+
+# Moved to test_output.py from test_cli.py.
+# Because test depends on ffmpeg (not available in Appveyor CI),
+# and only test_output.py (not test_cli.py) is skipped in Appveyor.
+def test_no_audio(mocker):
+    """ Corrscope Config without master audio should work. """
+    subdir = "tests"
+    wav = "sine440.wav"
+
+    channels = [ChannelConfig(wav)]
+    cfg = default_config(master_audio=None, channels=channels, begin_time=100)
+    # begin_time=100 skips all actual rendering.
+
+    output = FFmpegOutputConfig(None)
+    corr = CorrScope(cfg, Arguments(subdir, [output]))
+    corr.play()