Refactored tests. (#1120)

* Refactored tests.
* Fixed CI errors, and included misc tests.
* Omit mskanji from streaminfo test.
* Omit mskanji from no hints test.
* Log results of debugging in comments (linked to Magika issue)
* Added docs as to when to use misc tests.

packages/markitdown/tests/test_cli_misc.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3 -m pytest
+import subprocess
+import pytest
+from markitdown import __version__
+
+# This file contains CLI tests that are not directly tested by the FileTestVectors.
+# This includes things like help messages, version numbers, and invalid flags.
+
+
+def test_version() -> None:
+    result = subprocess.run(
+        ["python", "-m", "markitdown", "--version"], capture_output=True, text=True
+    )
+
+    assert result.returncode == 0, f"CLI exited with error: {result.stderr}"
+    assert __version__ in result.stdout, f"Version not found in output: {result.stdout}"
+
+
+def test_invalid_flag() -> None:
+    result = subprocess.run(
+        ["python", "-m", "markitdown", "--foobar"], capture_output=True, text=True
+    )
+
+    assert result.returncode != 0, f"CLI exited with error: {result.stderr}"
+    assert (
+        "unrecognized arguments" in result.stderr
+    ), f"Expected 'unrecognized arguments' to appear in STDERR"
+    assert "SYNTAX" in result.stderr, f"Expected 'SYNTAX' to appear in STDERR"
+
+
+if __name__ == "__main__":
+    """Runs this file's tests from the command line."""
+    test_version()
+    test_invalid_flag()
+    print("All tests passed!")