Add test coverage for darwin host configured addresses capability

test/unit/plugins/hosts/darwin/cap/configured_ip_addresses_test.rb

@@ -0,0 +1,31 @@
+require_relative "../../../../base"
+
+require_relative "../../../../../../plugins/hosts/darwin/cap/configured_ip_addresses"
+
+describe VagrantPlugins::HostDarwin::Cap::ConfiguredIPAddresses do
+
+  let(:subject){ VagrantPlugins::HostDarwin::Cap::ConfiguredIPAddresses }
+  let(:interfaces){ ["192.168.1.2"] }
+  before{ allow(Socket).to receive(:getifaddrs).and_return(
+    interfaces.map{|i| double(:socket, addr: Addrinfo.ip(i))}) }
+
+  it "should get list of available addresses" do
+    expect(subject.configured_ip_addresses(nil)).to eq(["192.168.1.2"])
+  end
+
+  context "with loopback address" do
+    let(:interfaces){ ["192.168.1.2", "127.0.0.1"] }
+
+    it "should not include loopback address" do
+      expect(subject.configured_ip_addresses(nil)).not_to include(["127.0.0.1"])
+    end
+  end
+
+  context "with IPv6 address" do
+    let(:interfaces){ ["192.168.1.2", "2001:200:dff:fff1:216:3eff:feb1:44d7"] }
+
+    it "should not include IPv6 address" do
+      expect(subject.configured_ip_addresses(nil)).not_to include(["2001:200:dff:fff1:216:3eff:feb1:44d7"])
+    end
+  end
+end