Add Owner property and some tests

src/main/kotlin/at/bitfire/dav4jvm/PropertyRegistry.kt

@@ -44,6 +44,7 @@ object PropertyRegistry {
             GetETag.Factory(),
             GetLastModified.Factory(),
             GroupMembership.Factory(),
+            Owner.Factory(),
             QuotaAvailableBytes.Factory(),
             QuotaUsedBytes.Factory(),
             ResourceType.Factory(),

src/main/kotlin/at/bitfire/dav4jvm/property/HrefListProperty.kt

@@ -17,9 +17,13 @@ abstract class HrefListProperty: Property {
 
     val hrefs = LinkedList<String>()
 
+    val href
+        get() = hrefs.firstOrNull()
+
     override fun toString() =  "href=[" + hrefs.joinToString(", ") + "]"
 
 
+
     abstract class Factory: PropertyFactory {
 
         fun create(parser: XmlPullParser, list: HrefListProperty): HrefListProperty {

src/main/kotlin/at/bitfire/dav4jvm/property/Owner.kt

+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+package at.bitfire.dav4jvm.property
+
+import at.bitfire.dav4jvm.Property
+import at.bitfire.dav4jvm.XmlUtils
+import org.xmlpull.v1.XmlPullParser
+
+class Owner: HrefListProperty() {
+
+    companion object {
+        @JvmField
+        val NAME = Property.Name(XmlUtils.NS_WEBDAV, "owner")
+    }
+
+
+    class Factory : HrefListProperty.Factory() {
+
+        override fun getName() = NAME
+
+        override fun create(parser: XmlPullParser) =
+                create(parser, Owner())
+
+    }
+
+}
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src/test/kotlin/at/bitfire/dav4jvm/property/CalendarDescriptionTest.kt

+package at.bitfire.dav4jvm.property
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class CalendarDescriptionTest: PropertyTest() {
+
+    @Test
+    fun testSource() {
+        val results = parseProperty("<calendar-description xmlns=\"urn:ietf:params:xml:ns:caldav\">My Calendar</calendar-description>")
+        val result = results.first() as CalendarDescription
+        assertEquals("My Calendar", result.description)
+    }
+
+}
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src/test/kotlin/at/bitfire/dav4jvm/property/OwnerTest.kt

+package at.bitfire.dav4jvm.property
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+
+class OwnerTest: PropertyTest() {
+
+    @Test
+    fun testOwner_WithoutHref() {
+        val results = parseProperty("<owner xmlns=\"DAV:\">https://example.com</owner>")
+        val owner = results.first() as Owner
+        assertNull(owner.href)
+    }
+
+    @Test
+    fun testOwner_OneHref() {
+        val results = parseProperty("<owner xmlns=\"DAV:\"><href>https://example.com</href></owner>")
+        val owner = results.first() as Owner
+        assertEquals("https://example.com", owner.href)
+    }
+
+}
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src/test/kotlin/at/bitfire/dav4jvm/property/PropertyTest.kt

+package at.bitfire.dav4jvm.property
+
+import at.bitfire.dav4jvm.Property
+import at.bitfire.dav4jvm.XmlUtils
+import java.io.StringReader
+
+open class PropertyTest {
+
+    companion object {
+
+        fun parseProperty(s: String): List<Property> {
+            val parser = XmlUtils.newPullParser()
+            parser.setInput(StringReader("<test>$s</test>"))
+            parser.nextTag()    // move into <test>
+            return Property.parse(parser)
+        }
+
+    }
+
+}
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