Add test for COMPLETED without timezone not throwing

 ClassCastException

Author: sunkup

lib/src/test/kotlin/at/bitfire/synctools/mapping/tasks/builder/CompletedBuilderTest.kt

@@ -17,6 +17,8 @@ import org.junit.Test
 import org.junit.runner.RunWith
 import org.robolectric.RobolectricTestRunner
 import java.time.Instant
+import java.time.LocalDateTime
+import java.time.ZoneId
 
 @RunWith(RobolectricTestRunner::class)
 class CompletedBuilderTest {
@@ -50,4 +52,22 @@ class CompletedBuilderTest {
         ), result.entityValues)
     }
 
+    @Test
+    fun `COMPLETED is floating LocalDateTime`() {
+        // COMPLETED without timezone (floating) must not crash with ClassCastException
+        // A floating COMPLETED is represented as a string without 'Z' (e.g. "20240601T120000")
+        val result = Entity(ContentValues())
+        builder.build(
+            from = Task(completedAt = Completed("20240601T120000")),
+            to = result
+        )
+        // floating date-time is interpreted in system default timezone
+        val expectedTimestamp = LocalDateTime.of(2024, 6, 1, 12, 0, 0)
+            .atZone(ZoneId.systemDefault()).toInstant().epochSecond * 1000
+        assertContentValuesEqual(contentValuesOf(
+            Tasks.COMPLETED to expectedTimestamp,
+            Tasks.COMPLETED_IS_ALLDAY to 0
+        ), result.entityValues)
+    }
+
 }