Add test for ical4j ServiceLoader without per-thread context class loader

Author: rfc2822

lib/src/main/kotlin/at/bitfire/ical4android/util/AndroidTimeUtils.kt

@@ -7,11 +7,14 @@
 package at.bitfire.ical4android.util
 
 import android.text.format.Time
-import at.bitfire.ical4android.Ical4Android
+import at.bitfire.ical4android.util.AndroidTimeUtils.androidifyTimeZone
+import at.bitfire.ical4android.util.AndroidTimeUtils.storageTzId
 import at.bitfire.ical4android.util.TimeApiExtensions.toLocalDate
 import at.bitfire.ical4android.util.TimeApiExtensions.toZonedDateTime
-import net.fortuna.ical4j.model.*
 import net.fortuna.ical4j.model.Date
+import net.fortuna.ical4j.model.DateList
+import net.fortuna.ical4j.model.DateTime
+import net.fortuna.ical4j.model.TemporalAmountAdapter
 import net.fortuna.ical4j.model.TimeZone
 import net.fortuna.ical4j.model.parameter.Value
 import net.fortuna.ical4j.model.property.DateListProperty
@@ -27,7 +30,8 @@ import java.time.ZoneOffset
 import java.time.ZonedDateTime
 import java.time.format.DateTimeFormatter
 import java.time.temporal.TemporalAmount
-import java.util.*
+import java.util.LinkedList
+import java.util.Locale
 import java.util.logging.Logger
 
 object AndroidTimeUtils {

lib/src/test/kotlin/at/bitfire/ical4android/Ical4jServiceLoaderTest.kt

@@ -0,0 +1,31 @@
+package at.bitfire.ical4android
+
+import net.fortuna.ical4j.data.CalendarBuilder
+import net.fortuna.ical4j.model.Component
+import net.fortuna.ical4j.model.component.VEvent
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import java.io.StringReader
+
+class Ical4jServiceLoaderTest {
+
+    @Test
+    fun Ical4j_ServiceLoader_DoesntNeedContextClassLoader() {
+        Thread.currentThread().contextClassLoader = null
+
+        val iCal = "BEGIN:VCALENDAR\n" +
+                "PRODID:-//xyz Corp//NONSGML PDA Calendar Version 1.0//EN\n" +
+                "VERSION:2.0\n" +
+                "BEGIN:VEVENT\n" +
+                "UID:[email protected]\n" +
+                "DTSTART:19960918T143000Z\n" +
+                "DTEND:19960920T220000Z\n" +
+                "SUMMARY:Networld+Interop Conference\n" +
+                "END:VEVENT\n" +
+                "END:VCALENDAR\n"
+        val result = CalendarBuilder().build(StringReader(iCal))
+        val vEvent = result.getComponent<VEvent>(Component.VEVENT)
+        assertEquals("Networld+Interop Conference", vEvent.summary.value)
+    }
+
+}