AMEND

Author: igoriakovlev

core/common/src/TimeZone.kt

@@ -32,7 +32,7 @@ public expect open class TimeZone {
          *
          * If the current system time zone changes, this function can reflect this change on the next invocation.
          *
-         * @throws IllegalTimeZoneException on the Wasm WASI platform due to the lack of support for retrieving system time zone information.
+         * Always return `UTC` timezone on the Wasm WASI platform due to the lack of support for retrieving system time zone information.
          */
         public fun currentSystemDefault(): TimeZone
 

core/common/test/InstantTest.kt

@@ -52,7 +52,6 @@ class InstantTest {
     }
 
     @Test
-    @WasmWasiIgnore
     fun instantToLocalDTConversion() {
         val now = Clock.System.now()
         println(now.toLocalDateTime(TimeZone.UTC))

core/common/test/LocalDateTest.kt

@@ -117,7 +117,6 @@ class LocalDateTest {
     }
 
     @Test
-    @WasmWasiIgnore
     @Suppress("UNUSED_VARIABLE")
     fun tomorrow() {
         val today = Clock.System.todayIn(TimeZone.currentSystemDefault())

core/common/test/LocalDateTimeTest.kt

@@ -66,7 +66,6 @@ class LocalDateTimeTest {
     }
 
     @Test
-    @WasmWasiIgnore
     fun getCurrentHMS() {
         with(Clock.System.now().toLocalDateTime(TimeZone.currentSystemDefault())) {
             println("${hour}h ${minute}m")

core/common/test/ReadmeTest.kt

@@ -21,7 +21,6 @@ class ReadmeTest {
     }
 
     @Test
-    @WasmWasiIgnore
     fun testConvertingAnInstantToLocalDateAndTimeComponents() {
         val currentMoment: Instant = Clock.System.now()
         val datetimeInUtc: LocalDateTime = currentMoment.toLocalDateTime(TimeZone.UTC)
@@ -36,7 +35,6 @@ class ReadmeTest {
     }
 
     @Test
-    @WasmWasiIgnore
     fun testGettingLocalDateComponents() {
         val now: Instant = Clock.System.now()
         val today: LocalDate = now.toLocalDateTime(TimeZone.currentSystemDefault()).date
@@ -47,7 +45,6 @@ class ReadmeTest {
     }
 
     @Test
-    @WasmWasiIgnore
     fun testGettingLocalTimeComponents() {
         val now: Instant = Clock.System.now()
         val thisTime: LocalTime = now.toLocalDateTime(TimeZone.currentSystemDefault()).time
@@ -147,7 +144,6 @@ class ReadmeTest {
     }
 
     @Test
-    @WasmWasiIgnore
     fun testInstantArithmetic() {
         run {
             val now = Clock.System.now()

core/common/test/TimeZoneTest.kt

@@ -23,7 +23,6 @@ class TimeZoneTest {
     }
 
     @Test
-    @WasmWasiIgnore
     fun system() {
         val tz = TimeZone.currentSystemDefault()
         println(tz)
@@ -34,7 +33,6 @@ class TimeZoneTest {
     }
 
     @Test
-    @WasmWasiIgnore
     fun available() {
         val allTzIds = TimeZone.availableZoneIds
         assertContains(allTzIds, "Europe/Berlin", "Europe/Berlin not in $allTzIds")

core/common/test/format/DateTimeComponentsTest.kt

@@ -12,7 +12,6 @@ import kotlin.test.*
 
 class DateTimeComponentsTest {
     @Test
-    @WasmWasiIgnore
     fun testAssigningIllegalValues() {
         val dateTimeComponents = DateTimeComponents().apply { setDateTimeOffset(instant, timeZone.offsetAt(instant)) }
         for (field in twoDigitFields) {
@@ -32,7 +31,6 @@ class DateTimeComponentsTest {
     }
 
     @Test
-    @WasmWasiIgnore
     fun testAssigningLegalValues() {
         val dateTimeComponents = DateTimeComponents().apply { setDateTimeOffset(instant, timeZone.offsetAt(instant)) }
         for (field in twoDigitFields) {
@@ -44,7 +42,6 @@ class DateTimeComponentsTest {
     }
 
     @Test
-    @WasmWasiIgnore
     fun testGettingInvalidMonth() {
         for (month in 1..12) {
             assertEquals(Month(month), DateTimeComponents().apply { monthNumber = month }.month)

core/wasmWasi/src/internal/Platform.kt

@@ -40,6 +40,6 @@ internal actual fun currentTime(): Instant = clockTimeGet().let { time ->
 }
 
 internal actual fun currentSystemDefaultZone(): Pair<String, TimeZoneRules?> =
-    throw UnsupportedOperationException("WASI platform does not support system timezone obtaining")
+    "UTC" to null
 
 internal actual val systemTzdb: TimeZoneDatabase = TzdbOnData()

core/wasmWasi/src/internal/TimeZonesInitializer.kt

@@ -40,5 +40,5 @@ internal class TzdbOnData: TimeZoneDatabase {
     }
 
     override fun availableTimeZoneIds(): Set<String> =
-        timeZonesProvider?.getTimeZones() ?: emptySet()
+        timeZonesProvider?.getTimeZones() ?: setOf("UTC")
 }