added registry command tests

test/commands/registry_test.rb

@@ -0,0 +1,25 @@
+require "test_helper"
+require "mrsk/configuration"
+require "mrsk/commands/registry"
+
+class CommandsRegistryTest < ActiveSupport::TestCase
+  setup do
+    @config = { service: "app", 
+      image: "dhh/app",
+      registry: { "username" => "dhh",
+        "password" => "secret",
+        "server" => "hub.docker.com"
+      },
+      servers: [ "1.1.1.1" ]
+    }
+    @registry = Mrsk::Commands::Registry.new Mrsk::Configuration.new(@config)
+  end
+
+  test "registry login" do
+    assert_equal [ :docker, :login, "hub.docker.com", "-u", "dhh", "-p", "secret" ], @registry.login
+  end
+
+  test "registry logout" do
+    assert_equal [:docker, :logout, "hub.docker.com"], @registry.logout
+  end
+end