test: package that installs a systemd service

tests/package/test_system.py

@@ -2,6 +2,7 @@
 
 from mybox.package import Package
 
+from ..base import CI, DOCKER
 from .base import PackageArgs, PackageTestBase
 
 
@@ -154,3 +155,24 @@ async def check_applicable(self) -> None:
         await super().check_applicable()
         if not (await self.driver.os()).switch(linux=True, macos=False):
             pytest.skip("This test is only applicable on Linux.")
+
+
+class TestService(PackageTestBase):
+    async def constructor_args(self) -> PackageArgs:
+        return {"system": "apache2", "service": "apache3"}
+
+    async def check_installed_command(self):
+        return ["ps", "aux"]
+
+    check_installed_output = "apache"
+
+    async def check_applicable(self) -> None:
+        await super().check_applicable()
+        if not CI:
+            pytest.skip("Test affects local system.")
+        (await self.driver.os()).switch_(
+            linux=lambda _: None,
+            macos=lambda: pytest.skip("Service test is only applicable on Linux"),
+        )
+        if DOCKER:
+            pytest.skip("Daemon relies on systemd, which is not available in Docker.")