Test with real binary

pyproject.toml

@@ -54,7 +54,7 @@ dest = "docs/cli.rst"
 python_files = "*_test.py"
 
 [tool.pytest.ini_options]
-markers = ["only", "legacy"]
+markers = ["only", "legacy", "slow"]
 
 [tool.pyright]
 reportPrivateUsage = false

tests/helper.py

@@ -23,6 +23,8 @@
 test_dir = os.path.dirname(os.path.abspath(__file__))
 ini_file = os.path.join(test_dir, "mscxyz.ini")
 
+mscore_executable: str | None = shutil.which("mscore")
+
 
 def get_path(filename: str, version: int = 2) -> Path:
     """
@@ -108,6 +110,19 @@ def read_file(filename: str | Path) -> str:
     return output
 
 
+def get_file_type(file: str | Path) -> str:
+    """Get the type of a file using the `file` command."""
+    output: str = subprocess.check_output(
+        ("file", "--brief", "--mime", file), encoding="utf-8"
+    )
+    return output.split(";")[0]
+
+
+def assert_file_type(file: str | Path, expected: str) -> None:
+    """Assert that the type of a file is equal to the expected type."""
+    assert get_file_type(file) == expected
+
+
 CliArg = Union[str, Path, Score]
 
 

tests/test_how_to.py

@@ -2,7 +2,12 @@
 
 from __future__ import annotations
 
-from tests.helper import stdout, sysexit
+from pathlib import Path
+
+import pytest
+
+from tests import helper
+from tests.helper import assert_file_type, cli, stdout, sysexit
 
 
 class TestSpecifyMusescoreFiles:
@@ -95,3 +100,46 @@ def test_tcsh(self) -> None:
         assert "# AUTOMATICALLY GENERATED by `shtab`" in sysexit(
             "--print-completion", "tcsh"
         )
+
+
+@pytest.mark.slow
+@pytest.mark.skipif(
+    helper.mscore_executable is None, reason="mscore executable not found"
+)
+@pytest.mark.parametrize(
+    "extension, expected",
+    [
+        ("mscz", "application/zip"),
+        ("mscx", "text/xml"),
+        ("spos", "text/xml"),
+        ("mpos", "text/xml"),
+        ("pdf", "application/pdf"),
+        ("svg", "image/svg+xml"),
+        ("png", "image/png"),
+        ("wav", "audio/x-wav"),
+        ("mp3", "audio/mpeg"),
+        ("ogg", "audio/ogg"),
+        ("flac", "audio/flac"),
+        ("mid", "audio/midi"),
+        ("midi", "audio/midi"),
+        ("kar", "audio/midi"),
+        ("musicxml", "text/xml"),
+        ("xml", "text/xml"),
+        ("mxl", "application/zip"),
+        ("brf", "text/plain"),
+        ("mei", "text/xml"),
+    ],
+)
+def test_export(extension: str, expected: str) -> None:
+    score = helper.get_score("simple.mscz", version=4)
+    cli("--export", extension, score)
+    numbering = ""
+    if extension in ("svg", "png"):
+        numbering = "-1"
+
+    dest = score.change_path(suffix=numbering, extension=extension)
+
+    dest = Path(str(score.path).replace(".mscz", f"{numbering}.{extension}"))
+    assert dest.exists()
+
+    assert_file_type(dest, expected)

tox.ini

@@ -6,7 +6,10 @@ isolated_build = True
 deps =
     pytest==7.4.4
 commands = pytest
-passenv = XDG_RUNTIME_DIR
+passenv =
+    XDG_RUNTIME_DIR
+    DISPLAY
+    XAUTHORITY
 
 [testenv:format]
 deps =