public void Coerce()
{
var opt = new OptAttribute("testName");
var coercedVal = opt.Coerce("12ms", typeof(TimeSpan));
Assert.AreEqual(TimeSpan.FromMilliseconds(12), coercedVal);
}
public void InvalidCoerceThrows()
{
var opt = new OptAttribute("testName");
var ex = AssertHelper.Throws <Exception>(() => opt.Coerce("12xs", typeof(TimeSpan)));
Assert.IsNotNull(ex);
Assert.IsNotNull(ex.Message);
Assert.IsTrue(ex.Message.Contains(opt.Name));
}
/// <summary>
/// Coerce a value to the specified <paramref name="targetType"/>. Supports Duration and Bool string/int formats.
/// </summary>
/// <param name="opt">The <see cref="OptAttribute.Name"/> to throw in the exception if coerce fails.</param>
/// <param name="value">The value to coerce.</param>
/// <param name="targetType">The target type.</param>
/// <returns>The value as the <paramref name="targetType"/>.</returns>
public static object Coerce(this OptAttribute opt, object value, Type targetType)
{
try
{
return(value.Coerce(targetType));
}
catch (Exception ex)
{
throw new Exception(string.Format("failed to coerce option {0}", opt.Name), ex);
}
}
