fix of #34 and upfix for #27

src/commonMain/kotlin/dev/inmo/krontab/internal/NearDateTimeCalculator.kt

@@ -101,7 +101,7 @@ internal fun NearDateTimeCalculatorDays(
     times: Array<Byte>
 ) = CommonNearDateTimeCalculator(
     times,
-    { it.dayOfMonth.toByte() },
+    { (it.dayOfMonth - 1).toByte() },
     { dateTime, newOne ->
         val dateTime = (if (newOne < dateTime.dayOfMonth) {
             dateTime.plus(1.months)
@@ -109,7 +109,7 @@ internal fun NearDateTimeCalculatorDays(
             dateTime
         })
         dateTime.copy(
-            dayOfMonth = min(dateTime.month.days(dateTime.year) - 1, newOne.toInt()), // index1
+            dayOfMonth = min(dateTime.month.days(dateTime.year), newOne.toInt() + 1), // index1
             hour = 0,
             minute = 0,
             second = 0,
@@ -122,7 +122,7 @@ internal fun NearDateTimeCalculatorMonths(
     times: Array<Byte>
 ) = CommonNearDateTimeCalculator(
     times,
-    { it.dayOfMonth.toByte() },
+    { it.month0.toByte() },
     { dateTime, newOne ->
         (if (newOne < dateTime.month0) {
             dateTime.plus(1.years)

src/commonTest/kotlin/dev/inmo/krontab/utils/InfinityLoopCheckTest.kt

@@ -1,14 +1,22 @@
 package dev.inmo.krontab.utils
 
+import com.soywiz.klock.DateTime
+import com.soywiz.klock.days
 import dev.inmo.krontab.buildSchedule
-import kotlin.test.Test
-import kotlin.test.assertNotNull
+import kotlin.test.*
 
 class InfinityLoopCheckTest {
     @Test
     fun absenceOfInfinityLoopCheckTest() {
-        runTest {
-            assertNotNull(buildSchedule("0 0 0 1 *").next())
+        val now = DateTime.now().startOfYear.startOfDay
+        for (i in 0 until now.year.days) {
+            val scheduleDateTime = (now + i.days)
+            runTest {
+                assertEquals(
+                    scheduleDateTime,
+                    buildSchedule("0 0 0 ${scheduleDateTime.dayOfMonth - 1} ${scheduleDateTime.month0}").next(now)
+                )
+            }
         }
     }
 }