IMocksControl control = createControl();
EC2Client client = control.createMock(EC2Client.class);
AvailabilityZoneAndRegionClient regionClient = control.createMock(AvailabilityZoneAndRegionClient.class);
expect(client.getAvailabilityZoneAndRegionServices()).andStubReturn(regionClient);
expect(regionClient.describeAvailabilityZonesInRegion("emptyRegion")).andReturn(
ImmutableSet.<AvailabilityZoneInfo> of());
Set<String> regions = ImmutableSet.of("emptyRegion");
control.replay();