public void op_FromString_string()
        {
            var expected = new Quality(0.45f);
            var actual   = Quality.FromString("0.45");

            Assert.Equal(expected, actual);
        }
 public void op_FromString_stringNull()
 {
     Assert.Throws <ArgumentNullException>(() => Quality.FromString(null));
 }
 public void op_FromString_stringEmpty(string value)
 {
     Assert.Throws <ArgumentOutOfRangeException>(() => Quality.FromString(value));
 }