source: class EnvironmentTest  {
  
      private static final String VDC;
      private static final String REGION;
  
      @Test
      public void testgetRegionNetworks() {
  
target: 
          ProductRelease productRelease = new ProductRelease("product", "2.0");
          List<ProductRelease> productReleases = new ArrayList<ProductRelease>();
          productReleases.add(productRelease);
  
          Tier tier = new Tier("name1", new Integer(1), new Integer(5), new Integer(1), productReleases);
          tier.setRegion("region1");
          tier.addNetwork(new Network("uno2", VDC, REGION));
  
          Tier tier3 = new Tier("name3", new Integer(1), new Integer(5), new Integer(1), productReleases);
          tier3.setRegion("region3");
          tier3.addNetwork(new Network("uno2", VDC, REGION));
  
          Tier tier2 = new Tier("name2", new Integer(1), new Integer(5), new Integer(1), productReleases);
          tier2.setRegion("region2");
          tier2.addNetwork(new Network("uno", VDC, REGION));
  
          Tier tier4 = new Tier("name5", new Integer(1), new Integer(5), new Integer(1), productReleases);
          tier4.setRegion("region2");
          tier4.addNetwork(new Network("uno2", VDC, REGION));
  
          Set<Tier> tiers = new HashSet<Tier>();
          tiers.add(tier);
          tiers.add(tier2);
          tiers.add(tier3);
          tiers.add(tier4);
  
          Environment envResult = new Environment("environemntName", tiers);
          Set<String> nets = envResult.getFederatedNetworks();
          assertEquals(nets.size(), 1);
  
      }
  
  }