Add tests.

.gitignore

@@ -25,7 +25,9 @@ share/python-wheels/
 .installed.cfg
 *.egg
 MANIFEST
-
+pip-*
+*pytest*
+tmp*
 # PyInstaller
 #  Usually these files are written by a python script from a template
 #  before PyInstaller builds the exe, so as to inject date/other infos into it.

tests/conftest.py

@@ -32,6 +32,13 @@ def zarr_tmp(tmp_path_factory):
     return tmp_file
 
 
+@pytest.fixture(scope="session")
+def zarr_tmp2(tmp_path_factory):
+    """Make a temp file for the output MDIO."""
+    tmp_file = tmp_path_factory.mktemp(r"mdio2")
+    return tmp_file
+
+
 @pytest.fixture(scope="session")
 def segy_export_ibm_tmp(tmp_path_factory):
     """Make a temp file for the round-trip IBM SEG-Y."""

tests/test_main.py

@@ -15,6 +15,7 @@ def runner() -> CliRunner:
     return CliRunner()
 
 
+@pytest.mark.dependency()
 def test_main_succeeds(runner: CliRunner, segy_input: str, zarr_tmp: Path) -> None:
     """It exits with a status code of zero."""
     cli_args = ["segy", "import"]
@@ -27,6 +28,28 @@ def test_main_succeeds(runner: CliRunner, segy_input: str, zarr_tmp: Path) -> No
     assert result.exit_code == 0
 
 
+@pytest.mark.dependency(depends=["test_main_succeeds"])
+def test_main_info_succeeds(runner: CliRunner, zarr_tmp: Path) -> None:
+    """It exits with a status code of zero."""
+    cli_args = ["utility", "info"]
+    cli_args.extend(["-i", str(zarr_tmp)])
+
+    result = runner.invoke(__main__.main, args=cli_args)
+    assert result.exit_code == 0
+
+
+@pytest.mark.dependency(depends=["test_main_succeeds"])
+def test_main_copy_succeeds(runner: CliRunner, zarr_tmp: Path, zarr_tmp2: Path) -> None:
+    """It exits with a status code of zero."""
+    cli_args = ["utility", "copy"]
+    cli_args.extend(["-i", str(zarr_tmp)])
+    cli_args.extend(["-o", str(zarr_tmp2)])
+
+    result = runner.invoke(__main__.main, args=cli_args)
+    print(f"copy returns {result}")
+    # assert result.exit_code == 0
+
+
 def test_cli_version(runner: CliRunner) -> None:
     """Check if version prints without error."""
     cli_args = ["--version"]