Added serialization test for value class that wraps Map

src/test/kotlin/io/github/projectmapk/jackson/module/kogera/zPorted/test/github/GitHub873.kt

@@ -0,0 +1,45 @@
+package io.github.projectmapk.jackson.module.kogera.zPorted.test.github
+
+import io.github.projectmapk.jackson.module.kogera.readValue
+import io.github.projectmapk.jackson.module.kogera.defaultMapper
+import org.junit.jupiter.api.Test
+
+class GitHub873 {
+    @Test
+    fun `should serialize value class`() {
+
+        val person = Person(
+            mapOf(
+                "id" to "123",
+                "updated" to "2023-11-22 12:11:23",
+                "login" to "2024-01-15",
+            ),
+        )
+
+        val serialized = defaultMapper.writeValueAsString(
+            TimestampedPerson(
+                123L,
+                Person(person.properties),
+            )
+        )
+
+        val deserialized = defaultMapper.readValue<TimestampedPerson>(serialized)
+
+        assert(
+            deserialized == TimestampedPerson(
+                123L,
+                Person(person.properties),
+            )
+        )
+    }
+
+    @JvmInline
+    value class Person(
+        val properties: Map<String, Any>,
+    )
+
+    data class TimestampedPerson(
+        val timestamp: Long,
+        val person: Person,
+    )
+}