MeanAnomalyTest(double expected_mean_anomaly,
DateTime test_time,
OrbitingBodyMathematics planet)
{
double mean_anomaly = planet.mean_anomaly(test_time); // in radians
double acceptable_error = 0.005;
double actual_error = Math.Abs(mean_anomaly - expected_mean_anomaly);
string error_message = differing_results_error_message(
Convert.ToString(expected_mean_anomaly),
Convert.ToString(mean_anomaly),
"radians"
);
Assert.LessOrEqual(actual_error, acceptable_error, error_message);
}