Added CLI tests

tests/test_applecrate_cli.py

@@ -0,0 +1,41 @@
+"""Test applecrate CLI."""
+
+import pathlib
+
+import pytest
+from click.testing import CliRunner
+
+from applecrate.cli import cli
+
+
+def test_cli_config_precedence():
+    """Test that CLI options override config file options."""
+    runner = CliRunner()
+    with runner.isolated_filesystem():
+        with open("applecrate.toml", "w") as f:
+            f.write(
+                """
+                output = "applecrate_output.pkg"
+                app = "applecrate"
+                """
+            )
+        with open("pyproject.toml", "w") as f:
+            f.write(
+                """
+                [tool.applecrate]
+                output = "pyproject_output.pkg"
+                version = "2.0.0"
+                app = "myapp"
+                """
+            )
+        result = runner.invoke(
+            cli,
+            [
+                "build",
+                "--output",
+                "{{ app }}-{{ version }}-cli_output.pkg",
+            ],
+        )
+        assert result.exit_code == 0
+        assert "applecrate-2.0.0-cli_output.pkg" in result.output
+        assert pathlib.Path("applecrate-2.0.0-cli_output.pkg").exists()