public void TestAsNumber() { string s1 = "hello world"; string s2 = "123"; string s3 = ""; JString jstring1 = new JString(s1); JString jstring2 = new JString(s2); JString jstring3 = new JString(s3); Assert.AreEqual(double.NaN, jstring1.AsNumber()); Assert.AreEqual(123, jstring2.AsNumber()); Assert.AreEqual(0, jstring3.AsNumber()); }