public void ChangePassword_Post_ReturnsViewIfModelStateIsInvalid()
{
// Arrange
AccountController controller = GetAccountController();
ChangePasswordModel model = new ChangePasswordModel()
{
OldPassword = "goodOldPassword",
NewPassword = "goodNewPassword",
ConfirmPassword = "goodNewPassword"
};
controller.ModelState.AddModelError("", "Dummy error message.");
// Act
ActionResult result = controller.ChangePassword(model);
// Assert
Assert.IsInstanceOfType(result, typeof(ViewResult));
ViewResult viewResult = (ViewResult)result;
Assert.AreEqual(model, viewResult.ViewData.Model);
Assert.AreEqual(10, viewResult.ViewData["PasswordLength"]);
}