git.giacomolli.uk - onechat/blob - schedule_cron_test.go

   1 package main
   2
   3 import (
   4         "testing"
   5         "time"
   6         _ "time/tzdata"
   7
   8         "github.com/stretchr/testify/require"
   9 )
  10
  11 func TestScheduleParseCronAccepts(t *testing.T) {
  12         testCases := []struct {
  13                 name       string
  14                 expression string
  15         }{
  16                 {
  17                         name:       "every 5 minutes is the shortest gap",
  18                         expression: "*/5 * * * *",
  19                 },
  20                 {
  21                         name:       "weekdays at 8",
  22                         expression: "0 8 * * 1-5",
  23                 },
  24                 {
  25                         name:       "lists and ranges in office hours",
  26                         expression: "0,30 9-17 * * 1-5",
  27                 },
  28                 {
  29                         name:       "a range with a step",
  30                         expression: "0 0 1-31/10 * *",
  31                 },
  32                 {
  33                         name:       "February 29 of the leap years",
  34                         expression: "0 12 29 2 *",
  35                 },
  36                 {
  37                         name:       "5 minutes across the end of an hour",
  38                         expression: "0,55 * * * *",
  39                 },
  40         }
  41
  42         for _, tc := range testCases {
  43                 t.Run(tc.name, func(t *testing.T) {
  44                         cron, err := scheduleParseCron(tc.expression)
  45                         require.NoError(t, err)
  46                         require.Equal(t, tc.expression, cron.String())
  47                 })
  48         }
  49 }
  50
  51 func TestScheduleParseCronRefuses(t *testing.T) {
  52         testCases := []struct {
  53                 name       string
  54                 expression string
  55                 message    string
  56         }{
  57                 {
  58                         name:       "four fields",
  59                         expression: "* * * *",
  60                         message:    "has 4 fields, not 5",
  61                 },
  62                 {
  63                         name:       "a seconds field",
  64                         expression: "0 0 8 * * *",
  65                         message:    "has 6 fields, not 5",
  66                 },
  67                 {
  68                         name:       "a macro",
  69                         expression: "@daily",
  70                         message:    "has 1 fields, not 5",
  71                 },
  72                 {
  73                         name:       "a day name",
  74                         expression: "0 8 * * MON",
  75                         message:    `the day of week field of "0 8 * * MON": "MON" is not a number from 0 to 7`,
  76                 },
  77                 {
  78                         name:       "a month name",
  79                         expression: "0 8 * JAN *",
  80                         message:    `"JAN" is not a number from 1 to 12`,
  81                 },
  82                 {
  83                         name:       "a question mark",
  84                         expression: "0 8 ? * *",
  85                         message:    `"?" is not a number from 1 to 31`,
  86                 },
  87                 {
  88                         name:       "the last day",
  89                         expression: "0 8 L * *",
  90                         message:    `"L" is not a number`,
  91                 },
  92                 {
  93                         name:       "the nearest weekday",
  94                         expression: "0 8 15W * *",
  95                         message:    `"15W" is not a number`,
  96                 },
  97                 {
  98                         name:       "the nth weekday",
  99                         expression: "0 8 * * 1#2",
 100                         message:    `"1#2" is not a number`,
 101                 },
 102                 {
 103                         name:       "a step after a single value",
 104                         expression: "5/10 * * * *",
 105                         message:    "has a step after a single value",
 106                 },
 107                 {
 108                         name:       "a minute out of range",
 109                         expression: "60 * * * *",
 110                         message:    `"60" is not a number from 0 to 59`,
 111                 },
 112                 {
 113                         name:       "an hour out of range",
 114                         expression: "0 24 * * *",
 115                         message:    `"24" is not a number from 0 to 23`,
 116                 },
 117                 {
 118                         name:       "day 0",
 119                         expression: "0 8 0 * *",
 120                         message:    `"0" is not a number from 1 to 31`,
 121                 },
 122                 {
 123                         name:       "month 13",
 124                         expression: "0 8 * 13 *",
 125                         message:    `"13" is not a number from 1 to 12`,
 126                 },
 127                 {
 128                         name:       "weekday 8",
 129                         expression: "0 8 * * 8",
 130                         message:    `"8" is not a number from 0 to 7`,
 131                 },
 132                 {
 133                         name:       "a negative number",
 134                         expression: "0 8 * * -1",
 135                         message:    `the range "-1"`,
 136                 },
 137                 {
 138                         name:       "a range with its start after its end",
 139                         expression: "0 10-5 * * *",
 140                         message:    "the start is after the end",
 141                 },
 142                 {
 143                         name:       "a step of 0",
 144                         expression: "0 */0 * * *",
 145                         message:    `the step of "*/0"`,
 146                 },
 147                 {
 148                         name:       "an empty item",
 149                         expression: "0,,30 * * * *",
 150                         message:    `"" is not a number`,
 151                 },
 152                 {
 153                         name:       "a day that never comes",
 154                         expression: "0 0 30 2 *",
 155                         message:    "matches no day in 8 years",
 156                 },
 157                 {
 158                         name:       "every minute",
 159                         expression: "* * * * *",
 160                         message:    "the runs of a schedule must be at least 5 minutes apart",
 161                 },
 162                 {
 163                         name:       "every 2 minutes",
 164                         expression: "*/2 * * * *",
 165                         message:    "the runs of a schedule must be at least 5 minutes apart",
 166                 },
 167                 {
 168                         name:       "two runs in one minute of the hour",
 169                         expression: "58,59 * * * *",
 170                         message:    "the runs of a schedule must be at least 5 minutes apart",
 171                 },
 172                 {
 173                         name:       "two runs across the end of an hour",
 174                         expression: "0,59 * * * *",
 175                         message:    "the runs of a schedule must be at least 5 minutes apart",
 176                 },
 177                 {
 178                         name:       "two runs across midnight",
 179                         expression: "0,59 0,23 * * *",
 180                         message:    "the runs of a schedule must be at least 5 minutes apart",
 181                 },
 182         }
 183
 184         for _, tc := range testCases {
 185                 t.Run(tc.name, func(t *testing.T) {
 186                         _, err := scheduleParseCron(tc.expression)
 187                         require.ErrorContains(t, err, tc.message)
 188                 })
 189         }
 190 }
 191
 192 func TestScheduleCronNext(t *testing.T) {
 193         newYork, err := time.LoadLocation("America/New_York")
 194         require.NoError(t, err)
 195
 196         testCases := []struct {
 197                 name       string
 198                 expression string
 199                 after      time.Time
 200                 next       time.Time
 201         }{
 202                 {
 203                         name:       "a weekday schedule skips the weekend",
 204                         expression: "0 8 * * 1-5",
 205                         after:      time.Date(2026, time.November, 6, 9, 0, 0, 0, time.UTC),
 206                         next:       time.Date(2026, time.November, 9, 8, 0, 0, 0, time.UTC),
 207                 },
 208                 {
 209                         name:       "the next time is after the given time",
 210                         expression: "0 8 * * *",
 211                         after:      time.Date(2026, time.November, 6, 8, 0, 0, 0, time.UTC),
 212                         next:       time.Date(2026, time.November, 7, 8, 0, 0, 0, time.UTC),
 213                 },
 214                 {
 215                         name:       "every 5 minutes",
 216                         expression: "*/5 * * * *",
 217                         after:      time.Date(2026, time.November, 6, 10, 3, 0, 0, time.UTC),
 218                         next:       time.Date(2026, time.November, 6, 10, 5, 0, 0, time.UTC),
 219                 },
 220                 {
 221                         name:       "day 31 skips the months with 30 days",
 222                         expression: "0 0 31 * *",
 223                         after:      time.Date(2026, time.November, 1, 0, 0, 0, 0, time.UTC),
 224                         next:       time.Date(2026, time.December, 31, 0, 0, 0, 0, time.UTC),
 225                 },
 226                 {
 227                         name:       "the first day after the end of a year",
 228                         expression: "0 9 1 * *",
 229                         after:      time.Date(2026, time.December, 31, 10, 0, 0, 0, time.UTC),
 230                         next:       time.Date(2027, time.January, 1, 9, 0, 0, 0, time.UTC),
 231                 },
 232                 {
 233                         name:       "February 29 waits for a leap year",
 234                         expression: "0 12 29 2 *",
 235                         after:      time.Date(2026, time.March, 1, 0, 0, 0, 0, time.UTC),
 236                         next:       time.Date(2028, time.February, 29, 12, 0, 0, 0, time.UTC),
 237                 },
 238                 {
 239                         name:       "weekday 7 is Sunday",
 240                         expression: "0 10 * * 7",
 241                         after:      time.Date(2026, time.November, 6, 0, 0, 0, 0, time.UTC),
 242                         next:       time.Date(2026, time.November, 8, 10, 0, 0, 0, time.UTC),
 243                 },
 244                 {
 245                         name:       "a day and a weekday match either",
 246                         expression: "0 0 13 * 5",
 247                         after:      time.Date(2026, time.November, 1, 0, 0, 0, 0, time.UTC),
 248                         next:       time.Date(2026, time.November, 6, 0, 0, 0, 0, time.UTC),
 249                 },
 250                 {
 251                         name:       "a day with a star and a weekday match both",
 252                         expression: "0 0 */2 * 5",
 253                         after:      time.Date(2026, time.November, 1, 0, 0, 0, 0, time.UTC),
 254                         next:       time.Date(2026, time.November, 13, 0, 0, 0, 0, time.UTC),
 255                 },
 256                 {
 257                         name:       "a time in the skipped hour runs later by the skip",
 258                         expression: "30 2 * * *",
 259                         after:      time.Date(2027, time.March, 14, 0, 0, 0, 0, newYork),
 260                         next:       time.Date(2027, time.March, 14, 7, 30, 0, 0, time.UTC),
 261                 },
 262                 {
 263                         name:       "the day after the skip runs at its time",
 264                         expression: "30 2 * * *",
 265                         after:      time.Date(2027, time.March, 14, 7, 30, 0, 0, time.UTC).In(newYork),
 266                         next:       time.Date(2027, time.March, 15, 6, 30, 0, 0, time.UTC),
 267                 },
 268                 {
 269                         name:       "every 30 minutes goes from before the skip to after it",
 270                         expression: "*/30 * * * *",
 271                         after:      time.Date(2027, time.March, 14, 6, 30, 0, 0, time.UTC).In(newYork),
 272                         next:       time.Date(2027, time.March, 14, 7, 0, 0, 0, time.UTC),
 273                 },
 274                 {
 275                         name:       "a time in the repeated hour runs at its first occurrence",
 276                         expression: "30 1 * * *",
 277                         after:      time.Date(2026, time.November, 1, 0, 0, 0, 0, newYork),
 278                         next:       time.Date(2026, time.November, 1, 5, 30, 0, 0, time.UTC),
 279                 },
 280                 {
 281                         name:       "a time in the repeated hour runs once",
 282                         expression: "30 1 * * *",
 283                         after:      time.Date(2026, time.November, 1, 5, 30, 0, 0, time.UTC).In(newYork),
 284                         next:       time.Date(2026, time.November, 2, 6, 30, 0, 0, time.UTC),
 285                 },
 286                 {
 287                         name:       "every 30 minutes does not repeat the repeated hour",
 288                         expression: "*/30 * * * *",
 289                         after:      time.Date(2026, time.November, 1, 5, 30, 0, 0, time.UTC).In(newYork),
 290                         next:       time.Date(2026, time.November, 1, 7, 0, 0, 0, time.UTC),
 291                 },
 292         }
 293
 294         for _, tc := range testCases {
 295                 t.Run(tc.name, func(t *testing.T) {
 296                         cron, err := scheduleParseCron(tc.expression)
 297                         require.NoError(t, err)
 298
 299                         next, found := cron.Next(tc.after)
 300                         require.True(t, found)
 301                         require.True(t, tc.next.Equal(next), "next is %s", next)
 302                 })
 303         }
 304 }
 305
 306 func TestScheduleWallTime(t *testing.T) {
 307         newYork, err := time.LoadLocation("America/New_York")
 308         require.NoError(t, err)
 309
 310         testCases := []struct {
 311                 name string
 312                 hour int
 313                 day  int
 314                 time time.Time
 315         }{
 316                 {
 317                         name: "a normal wall time",
 318                         hour: 9,
 319                         day:  1,
 320                         time: time.Date(2026, time.November, 1, 14, 0, 0, 0, time.UTC),
 321                 },
 322                 {
 323                         name: "a wall time in the repeated hour is its first occurrence",
 324                         hour: 1,
 325                         day:  1,
 326                         time: time.Date(2026, time.November, 1, 5, 0, 0, 0, time.UTC),
 327                 },
 328         }
 329
 330         for _, tc := range testCases {
 331                 t.Run(tc.name, func(t *testing.T) {
 332                         got := scheduleWallTime(2026, time.November, tc.day, tc.hour, 0, newYork)
 333                         require.True(t, tc.time.Equal(got), "time is %s", got)
 334                 })
 335         }
 336 }