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summary: Ensure that the DBus interface works
details: |
The DBus interface allows owning a name on DBus public bus.
The test uses two snaps, a provider declaring a DBus slot and a consumer
with a plug with the same attributes as the slot. The provider requests
a DBus name and, when the plug is connected, the consumer can call the
method exposed by the provider.
systems:
- -ubuntu-14.04-* # no tests.session support
- -ubuntu-core-* # dbus interface disallows unconfined access on core,
# in addition, up until core20 session bus was not supported
- -amazon-linux-2-* # session bus is not supported
prepare: |
echo "Give a snap declaring a dbus slot in installed"
snap install --beta test-snapd-dbus-provider
echo "And a snap declaring a matching dbus plug is installed"
snap install --beta test-snapd-dbus-consumer
tests.session -u test prepare
# XXX: The pair of snaps in this test communicate over the session bus but
# are normal applications that require starting. Instead of using
# run-in-the-background hack, use systemd-run to start a session service
# wrapping the application. This ensures it has access to the session bus
# and that if it forks off any unexpected processes, those are cleaned up
# on shutdown.
echo "And the provider dbus loop is started"
tests.session -u test exec systemd-run --user --unit dbus-provider.service test-snapd-dbus-provider.provider
restore: |
tests.session -u test exec systemctl --user stop dbus-provider.service
tests.session -u test restore
execute: |
echo "Then the dbus name is properly reserved by the provider and the method is accessible"
retry -n 5 --wait 1 sh -c 'tests.session -u test exec dbus-send --print-reply --dest=com.dbustest.HelloWorld /com/dbustest/HelloWorld com.dbustest.HelloWorld.SayHello | MATCH "hello world"'
echo "And plug is disconnected by default"
snap interfaces -i dbus | MATCH '^- +test-snapd-dbus-consumer:dbus-test'
echo "When the plug is connected"
snap connect test-snapd-dbus-consumer:dbus-test test-snapd-dbus-provider:dbus-test
echo "Then the consumer is able to call the provided method"
tests.session -u test exec test-snapd-dbus-consumer.dbus-consumer | MATCH "hello world"
if [ "$(snap debug confinement)" = partial ]; then
exit 0
fi
echo "When the plug is disconnected"
snap disconnect test-snapd-dbus-consumer:dbus-test test-snapd-dbus-provider:dbus-test
echo "The consumer is not able to access the provided method"
if tests.session -u test exec test-snapd-dbus-consumer.dbus-consumer 2> call.error; then
echo "Expected permission error calling dbus method with disconnected plug"
exit 1
fi
MATCH "Permission denied" < call.error
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