Add glue record requirement validation

#661

test/models/nameserver/glue_record_test.rb

@@ -0,0 +1,26 @@
+require 'test_helper'
+
+class NameserverGlueRecordTest < ActiveSupport::TestCase
+  def setup
+    @nameserver = nameservers(:ns1)
+  end
+
+  def test_invalid_without_ip_if_glue_record_is_required
+    @nameserver.hostname = 'ns1.shop.test'
+    @nameserver.ipv4 = @nameserver.ipv6 = ''
+    assert @nameserver.invalid?
+    assert @nameserver.errors.added?(:base, :ip_required)
+  end
+
+  def test_valid_with_ip_if_glue_record_is_required
+    @nameserver.hostname = 'ns1.shop.test'
+    @nameserver.ipv4 = ['192.0.2.1']
+    @nameserver.ipv6 = ''
+    assert @nameserver.valid?
+  end
+
+  def test_valid_without_ip_if_glue_record_is_not_required
+    @nameserver.ipv4 = @nameserver.ipv6 = ''
+    assert @nameserver.valid?
+  end
+end