tests: new test for interface network status

tests/lib/snaps/test-snapd-network-status-provider/consumer

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+import dbus
+import os
+import sys
+
+INTERFACE = 'com.ubuntu.connectivity1.NetworkingStatus'
+PATH = '/com/ubuntu/connectivity1/NetworkingStatus'
+
+
+def _get_obj():
+    return dbus.SystemBus().get_object(INTERFACE, PATH)
+
+
+def get_version():
+    obj = _get_obj()
+    return obj.GetVersion(dbus_interface=INTERFACE)
+
+
+def get_state():
+    obj = _get_obj()
+    return obj.GetState(dbus_interface=INTERFACE)
+
+
+if __name__ == "__main__":
+    if len(sys.argv) > 1 and sys.argv[1] == "GetState":
+        res = get_state()
+    else:
+        res = get_version()
+
+    print(res)

tests/lib/snaps/test-snapd-network-status-provider/provider.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+
+from gi.repository import GLib
+import dbus
+import dbus.service
+
+from dbus.mainloop.glib import DBusGMainLoop
+
+INTERFACE = 'com.ubuntu.connectivity1.NetworkingStatus'
+PATH = '/com/ubuntu/connectivity1/NetworkingStatus'
+
+DBusGMainLoop(set_as_default=True)
+
+
+class DBusProvider(dbus.service.Object):
+    def __init__(self):
+        bus = dbus.SystemBus()
+        bus_name = dbus.service.BusName(INTERFACE, bus=bus)
+        dbus.service.Object.__init__(self, bus_name, PATH)
+
+    @dbus.service.method(dbus_interface=INTERFACE, out_signature="s")
+    def GetVersion(self):
+        return "my-ap-version"
+
+    @dbus.service.method(dbus_interface=INTERFACE, out_signature="s")
+    def GetState(self):
+        return "my-ap-state"
+
+
+if __name__ == "__main__":
+    DBusProvider()
+    loop = GLib.MainLoop()
+    loop.run()

tests/lib/snaps/test-snapd-network-status-provider/snapcraft.yaml

@@ -0,0 +1,26 @@
+name: test-snapd-network-status-provider
+version: 1.0
+summary: Basic network status provider snap
+description: A basic snap declaring an network status slot
+confinement: strict
+grade: stable
+
+apps:
+    provider:
+        command: wrapper
+        slots: [network-status-test]
+    consumer:
+        command: consumer
+        plugs: [network-status]
+
+slots:
+    network-status-test:
+      interface: network-status
+
+parts:
+    deps:
+        plugin: python
+        stage-packages: [python3-gi, python3-dbus, gir1.2-glib-2.0]
+    copy:
+        plugin: dump
+        source: .

tests/lib/snaps/test-snapd-network-status-provider/wrapper

@@ -0,0 +1,3 @@
+export GI_TYPELIB_PATH=$SNAP/usr/lib/girepository-1.0:$(ls -d $SNAP/usr/lib/*/girepository-1.0)
+
+$SNAP/usr/bin/python3 $SNAP/provider.py

tests/main/interfaces-network-status/task.yaml

@@ -0,0 +1,67 @@
+summary: Ensure that the network-status interface works.
+
+details: |
+    The network-status interface allows a snap to monitor network connection status.
+
+    A snap which defines the network-status plug must be shown in the interfaces list.
+    The plug is autoconnected on install and, as usual, must be able to be disconnect/reconnect.
+
+    The snap is also declaring a plug on this interface must be able to ask for its status.
+
+# dbus-launch not supported in ubuntu-core
+systems: [-ubuntu-core-16-*]
+
+prepare: |
+    . "$TESTSLIB/dbus.sh"
+    . "$TESTSLIB/dirs.sh"
+
+    echo "Given a snap declaring a plug on the network-status interface is installed"
+    snap install test-snapd-network-status-provider
+
+    echo "And the provider dbus loop is started"
+    start_dbus_unit $SNAP_MOUNT_DIR/bin/test-snapd-network-status-provider.provider
+
+restore: |
+    rm -f getstate.error
+
+    . "$TESTSLIB/dbus.sh"
+    stop_dbus_unit
+
+execute: |
+    CONNECTED_PATTERN="^test-snapd-network-status-provider:network-status-test +test-snapd-network-status-provider:network-status"
+    DISCONNECTED_PATTERN="^- +test-snapd-network-status-provider:network-status$"
+
+    echo "The interface is connected by default"
+    snap interfaces | MATCH "$CONNECTED_PATTERN"
+
+    echo "Then wait until the dbus name is properly reserved"
+    for i in $(seq 10); do
+        if ! test-snapd-network-status-provider.consumer GetVersion | MATCH "my-ap-version"; then
+            sleep 1
+        else
+            break
+        fi
+    done
+
+    echo "Check the network-status is working from the consumer app in the snap"
+    test-snapd-network-status-provider.consumer GetState | MATCH "my-ap-state"
+    test-snapd-network-status-provider.consumer GetVersion | MATCH "my-ap-version"
+
+    if [ "$(snap debug confinement)" = partial ] ; then
+        exit 0
+    fi
+
+    echo "When the plug is disconnected"
+    snap disconnect test-snapd-network-status-provider:network-status test-snapd-network-status-provider:network-status-test
+    snap interfaces | MATCH "$DISCONNECTED_PATTERN"
+
+    echo "And the snap state cannot be accessed"
+    if test-snapd-network-status-provider.consumer GetState 2>${PWD}/getstate.error; then
+        echo "Expected permission error trying to introspect state with disconnected plug"
+        exit 1
+    fi
+    MATCH "Permission denied" < getstate.error
+
+    echo "When the plug is re-connected the interfaces show the connection"
+    snap connect test-snapd-network-status-provider:network-status test-snapd-network-status-provider:network-status-test
+    snap interfaces | MATCH "$CONNECTED_PATTERN"