Add tests for zonefile #2806

spec/models/zonefile_setting_spec.rb

@@ -49,4 +49,34 @@ describe ZonefileSetting do
 
     @zonefile.scan(/^#{d.name}/).count.should == 0
   end
+
+  it 'does not create duplicate zones' do
+    Fabricate(:zonefile_setting)
+    expect { Fabricate(:zonefile_setting) }.to raise_error(ActiveRecord::RecordInvalid)
+  end
+
+  it 'does not allow deleting zone when it has existing domains' do
+    zs = ZonefileSetting.where({
+      origin: 'ee',
+      ttl: 43200,
+      refresh: 3600,
+      retry: 900,
+      expire: 1209600,
+      minimum_ttl: 3600,
+      email: 'hostmaster.eestiinternet.ee',
+      master_nameserver: 'ns.tld.ee'
+    }).first_or_create!
+
+    d = Fabricate(:domain)
+
+    zs.destroy.should == false
+
+    zs.errors.full_messages.should match_array(["There are 1 domains in this zone"])
+    ZonefileSetting.count.should == 1
+
+    d.destroy
+    zs.destroy
+
+    ZonefileSetting.count.should == 0
+  end
 end