public DateMonthYearModelBinder(string dateStringFormat, Forms.DateMonthYearAttribute.DayValueOption dayValue)
{
if (string.IsNullOrWhiteSpace(dateStringFormat))
{
throw new ArgumentNullException(nameof(dateStringFormat), "A date format string must be supplied");
}
this.dateStringFormat = dateStringFormat;
this.dayValue = dayValue;
}
public async Task ShouldBindDateTimeAsModelWithCustomDateFormatStringAndDayValue(string dateFormatString, string?year, string?month, Forms.DateMonthYearAttribute.DayValueOption dayValue, bool isValid, string expectedDateString)
{
var formCollection = new FormCollection(new Dictionary <string, StringValues>()
{
{ "Month", month?.ToString() },
{ "Year", year?.ToString() },
});
var binder = new DateMonthYearModelBinder(dateFormatString, dayValue);
var vp = new FormValueProvider(BindingSource.Form, formCollection, CultureInfo.CurrentCulture);
var context = GetBindingContext(vp, typeof(string));
await binder.BindModelAsync(context);
context.ModelState.IsValid.Should().Be(isValid);
if (isValid)
{
var dateValueString = (string)context.Result.Model;
dateValueString.Should().Be(expectedDateString);
}
else
{
context.ModelState.ErrorCount.Should().Be(1);
}
}