Merge pull request #43 from ProjectMapK/value-deser-tests

Added test on deserialization of `value class`

src/test/kotlin/com/fasterxml/jackson/module/kotlin/_integration/deser/value_class/deserializer/has_json_value/SpecifiedForObjectMapperTest.kt

@@ -0,0 +1,88 @@
+package com.fasterxml.jackson.module.kotlin._integration.deser.value_class.deserializer.has_json_value
+
+import com.fasterxml.jackson.databind.module.SimpleModule
+import com.fasterxml.jackson.module.kotlin.MissingKotlinParameterException
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+
+class SpecifiedForObjectMapperTest {
+    companion object {
+        val mapper = jacksonObjectMapper().apply {
+            val module = SimpleModule().apply {
+                this.addDeserializer(Primitive::class.java, Primitive.Deserializer())
+                this.addDeserializer(NonNullObject::class.java, NonNullObject.Deserializer())
+                this.addDeserializer(NullableObject::class.java, NullableObject.Deserializer())
+            }
+            this.registerModule(module)
+        }
+    }
+
+    data class Dst(
+        val pNn: Primitive,
+        val pN: Primitive?,
+        val nnoNn: NonNullObject,
+        val nnoN: NonNullObject?,
+        val noNn: NullableObject,
+        val noN: NullableObject?
+    )
+
+    @Test
+    fun nonNull() {
+        val expected = Dst(
+            Primitive(1),
+            Primitive(2),
+            NonNullObject("foo"),
+            NonNullObject("bar"),
+            NullableObject("baz"),
+            NullableObject("qux")
+        )
+        val src = mapper.writeValueAsString(expected)
+        val result = mapper.readValue<Dst>(src)
+
+        assertEquals(expected, result)
+    }
+
+    // region Kogera42
+    // After https://github.com/ProjectMapK/jackson-module-kogera/issues/42 is resolved, modify the test.
+    data class WithoutNoNn(
+        val pNn: Primitive,
+        val pN: Primitive?,
+        val nnoNn: NonNullObject,
+        val nnoN: NonNullObject?,
+        // val noNn: NullableObject,
+        val noN: NullableObject?
+    )
+
+    @Test
+    fun withNull() {
+        val expected = WithoutNoNn(
+            Primitive(1),
+            null,
+            NonNullObject("foo"),
+            null,
+            // NullableObject(null),
+            null
+        )
+        val src = mapper.writeValueAsString(expected)
+        val result = mapper.readValue<WithoutNoNn>(src)
+
+        assertEquals(expected, result)
+    }
+
+    data class Tmp(val noNn: NullableObject)
+
+    @Test
+    fun temp() {
+        val expected = Tmp(NullableObject(null))
+        val src = mapper.writeValueAsString(expected)
+
+        assertThrows<MissingKotlinParameterException>("Kogera #42 is fixed") {
+            val result = mapper.readValue<Tmp>(src)
+            assertEquals(expected, result)
+        }
+    }
+    // endregion
+}

src/test/kotlin/com/fasterxml/jackson/module/kotlin/_integration/deser/value_class/deserializer/has_json_value/ValueClasses.kt

@@ -0,0 +1,32 @@
+package com.fasterxml.jackson.module.kotlin._integration.deser.value_class.deserializer.has_json_value
+
+import com.fasterxml.jackson.annotation.JsonValue
+import com.fasterxml.jackson.core.JsonParser
+import com.fasterxml.jackson.databind.DeserializationContext
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer
+
+@JvmInline
+value class Primitive(@get:JsonValue val v: Int) {
+    class Deserializer : StdDeserializer<Primitive>(Primitive::class.java) {
+        override fun deserialize(p: JsonParser, ctxt: DeserializationContext): Primitive = Primitive(p.intValue)
+    }
+}
+
+@JvmInline
+value class NonNullObject(@get:JsonValue val v: String) {
+    class Deserializer : StdDeserializer<NonNullObject>(NonNullObject::class.java) {
+        override fun deserialize(p: JsonParser, ctxt: DeserializationContext): NonNullObject =
+            NonNullObject(p.valueAsString)
+    }
+}
+
+@JvmInline
+value class NullableObject(@get:JsonValue val v: String?) {
+    class Deserializer : StdDeserializer<NullableObject>(NullableObject::class.java) {
+        // After https://github.com/ProjectMapK/jackson-module-kogera/issues/42 is resolved, uncomment out
+        // override fun getNullValue(ctxt: DeserializationContext): NullableObject = NullableObject(null)
+
+        override fun deserialize(p: JsonParser, ctxt: DeserializationContext): NullableObject =
+            NullableObject(p.valueAsString)
+    }
+}