public void GettingAreValid_WhenCredentialsAreComplete_ReturnsTrue()
 {
     var test = new TwitterCredentials("consumerKey", "consumerSecret", "accessToken", "accessTokenSecret");
     Assert.True(test.AreValid);
 }
 public void GettingAreValid_WhenAccessTokenIsMissing_ReturnsFalse()
 {
     var test = new TwitterCredentials("consumerKey", "consumerSecret", "", "accessTokenSecret");
     Assert.False(test.AreValid);
 }