jvmTest.io.islandtime.internal.PlatformImplTest.kt Maven / Gradle / Ivy

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A multiplatform library for working with dates and times

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package io.islandtime.internal

import io.islandtime.DateTimeException
import io.islandtime.TimeZone
import io.islandtime.test.AbstractIslandTimeTest
import org.junit.Test
import kotlin.test.assertEquals
import kotlin.test.assertFailsWith
import kotlin.test.assertTrue

class PlatformImplTest : AbstractIslandTimeTest() {
    @Test
    fun `converts java_util_TimeZone with UTC equivalent IDs to Island region-based zones`() {
        listOf("GMT", "UTC").forEach { id ->
            repeat(2) {
                val tz = java.util.TimeZone.getTimeZone(id).toIslandTimeZone()
                assertEquals(id, tz.id)
                assertTrue { tz.isValid }
            }
        }
    }

    @Test
    fun `converts java_util_TimeZone with fixed offset IDs to Island fixed offset zones`() {
        val tz1 = java.util.TimeZone.getTimeZone("GMT+18:00").toIslandTimeZone()
        assertTrue { tz1 is TimeZone.FixedOffset }
        assertEquals("+18:00", tz1.id)

        val tz2 = java.util.TimeZone.getTimeZone("GMT-18:00").toIslandTimeZone()
        assertTrue { tz2 is TimeZone.FixedOffset }
        assertEquals("-18:00", tz2.id)
    }

    @Test
    fun `throws exception if converting java_util_TimeZone with fixed offset produces an invalid Island offset`() {
        listOf("GMT+18:01", "GMT-18:01").forEach {
            assertFailsWith { java.util.TimeZone.getTimeZone(it).toIslandTimeZone() }
        }
    }
}