115     pub fn from_year(year: i32) -> YearFlags {  in from_year()  method
500         assert_eq!(YearFlags::from_year(2014).ndays(), 365);  in test_year_flags_ndays_from_year()
501         assert_eq!(YearFlags::from_year(2012).ndays(), 366);  in test_year_flags_ndays_from_year()
502         assert_eq!(YearFlags::from_year(2000).ndays(), 366);  in test_year_flags_ndays_from_year()
503         assert_eq!(YearFlags::from_year(1900).ndays(), 365);  in test_year_flags_ndays_from_year()
504         assert_eq!(YearFlags::from_year(1600).ndays(), 366);  in test_year_flags_ndays_from_year()
505         assert_eq!(YearFlags::from_year(1).ndays(), 365);  in test_year_flags_ndays_from_year()
506         assert_eq!(YearFlags::from_year(0).ndays(), 366); // 1 BCE (proleptic Gregorian)  in test_year_flags_ndays_from_year()
507         assert_eq!(YearFlags::from_year(-1).ndays(), 365); // 2 BCE  in test_year_flags_ndays_from_year()
508         assert_eq!(YearFlags::from_year(-4).ndays(), 366); // 5 BCE  in test_year_flags_ndays_from_year()
509         assert_eq!(YearFlags::from_year(-99).ndays(), 365); // 100 BCE  in test_year_flags_ndays_from_year()
510         assert_eq!(YearFlags::from_year(-100).ndays(), 365); // 101 BCE  in test_year_flags_ndays_from_year()
511         assert_eq!(YearFlags::from_year(-399).ndays(), 365); // 400 BCE  in test_year_flags_ndays_from_year()
512         assert_eq!(YearFlags::from_year(-400).ndays(), 366); // 401 BCE  in test_year_flags_ndays_from_year()