public void TestRenderingValidField()
        {
            IField field = new Field(5, 10);

            string expected = field.ToString() + Environment.NewLine;

            using (StringWriter sw = new StringWriter())
            {
                Console.SetOut(sw);

                renderer.RenderGameField(field);

                Assert.AreEqual(expected, sw.ToString(), "The console renderer must invoke the toString() method of the field.");
            }
        }