private void AssertDateTimeOffset(
DateTime dateTime,
Func <DateTime, DateTimeOffset> function,
TimeZoneInfo timeZoneInfo,
bool summerTime)
{
var dateTimeOffset = function.Invoke(dateTime);
Assert.Equal(dateTime, dateTimeOffset.Date);
var expected = timeZoneInfo.BaseUtcOffset.TotalMinutes;
if (summerTime)
{
expected += timeZoneInfo.GetAdjustmentRuleTimeSpan(dateTime).TotalMinutes;
}
var actual = (new DateTimeOffset(dateTime, TimeSpan.Zero) - dateTimeOffset).TotalMinutes;
Assert.Equal(expected, actual);
}
