@Test(expected = IllegalArgumentException.class)
    public void prod_deployment_requires_redundancy() {
        ProvisioningTester tester = new ProvisioningTester.Builder().zone(new Zone(Environment.prod, RegionName.from("us-east"))).build();

        ApplicationId application = ProvisioningTester.applicationId();
        tester.makeReadyHosts(10, defaultResources).activateTenantHosts();
        prepare(application, 1, 1, 1, 1, defaultResources, tester);
    }
Various allocation sequence scenarios

@author bratseth
@author mpolden
node-repository/src/test/java/com/yahoo/vespa/hosted/provision/provisioning/ProvisioningTest.java