Upgrade to JUnit5

pom.xml

@@ -111,15 +111,26 @@
 
         <!-- only for testing... -->
         <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.jetbrains.kotlin</groupId>
             <artifactId>kotlin-test-junit</artifactId>
             <version>${version.kotlin}</version>
             <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>junit</groupId>
+                    <artifactId>junit</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.dataformat</groupId>

release-notes/CREDITS-2.x

@@ -18,6 +18,7 @@ Contributors:
 # 2.19.0 (not yet released)
 
 WrongWrong (@k163377)
+* #866: Upgrade to JUnit5
 * #861: Update Kotlin to 1.9.24
 * #858: Refactor findDefaultCreator
 * #839: Remove useKotlinPropertyNameForGetter and unify with kotlinPropertyNameAsImplicitName

src/test/kotlin/com/fasterxml/jackson/module/kotlin/ArgumentBucketTest.kt

@@ -1,24 +1,28 @@
 package com.fasterxml.jackson.module.kotlin
 
 import com.fasterxml.jackson.annotation.JsonCreator
-import org.junit.Ignore
-import org.junit.experimental.runners.Enclosed
-import org.junit.runner.RunWith
+import org.junit.jupiter.api.Nested
 import kotlin.reflect.KFunction
 import kotlin.reflect.full.functions
 import kotlin.reflect.full.hasAnnotation
-import kotlin.test.Test
+import org.junit.jupiter.api.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertFalse
 import kotlin.test.assertTrue
 
-
-@RunWith(Enclosed::class)
 class ArgumentBucketTest {
-    class Normal {
-        @Ignore
-        data class Constructor(val foo: String, val bar: String)
+    data class Constructor(val foo: String, val bar: String)
+
+    data class Method(val foo: String, val bar: String) {
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun of(foo: String, bar: String): Method = Method(foo, bar)
+        }
+    }
 
+    @Nested
+    inner class Normal {
         @Test
         fun constructorTest() {
             val function: KFunction<*> = ::Constructor
@@ -45,15 +49,6 @@ class ArgumentBucketTest {
             assertEquals("bar", bucket[params[1]])
         }
 
-        @Ignore
-        data class Method(val foo: String, val bar: String) {
-            companion object {
-                @JvmStatic
-                @JsonCreator
-                fun of(foo: String, bar: String): Method = Method(foo, bar)
-            }
-        }
-
         @Test
         fun methodTest() {
             val function: KFunction<*> = Method.Companion::class.functions.first { it.hasAnnotation<JsonCreator>() }

src/test/kotlin/com/fasterxml/jackson/module/kotlin/DslTest.kt

@@ -7,8 +7,8 @@ import com.fasterxml.jackson.module.kotlin.KotlinFeature.NullToEmptyCollection
 import com.fasterxml.jackson.module.kotlin.KotlinFeature.NullToEmptyMap
 import com.fasterxml.jackson.module.kotlin.KotlinFeature.SingletonSupport
 import com.fasterxml.jackson.module.kotlin.KotlinFeature.StrictNullChecks
-import org.junit.Assert.assertNotNull
-import org.junit.Test
+import org.junit.jupiter.api.Assertions.assertNotNull
+import org.junit.jupiter.api.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertFalse
 import kotlin.test.assertTrue

src/test/kotlin/com/fasterxml/jackson/module/kotlin/JDKSerializabilityTestHelper.kt

@@ -1,6 +1,6 @@
 package com.fasterxml.jackson.module.kotlin
 
-import junit.framework.TestCase
+import org.junit.jupiter.api.Assertions.fail
 import java.io.ByteArrayInputStream
 import java.io.ByteArrayOutputStream
 import java.io.ObjectInputStream
@@ -14,14 +14,13 @@ fun jdkSerialize(o: Any): ByteArray {
     return bytes.toByteArray()
 }
 
-fun <T> jdkDeserialize(raw: ByteArray): T? {
+fun <T> jdkDeserialize(raw: ByteArray): T {
     val objIn = ObjectInputStream(ByteArrayInputStream(raw))
     return try {
         @Suppress("UNCHECKED_CAST")
         objIn.readObject() as T
     } catch (e: ClassNotFoundException) {
-        TestCase.fail("Missing class: " + e.message)
-        null
+        fail("Missing class: " + e.message)
     } finally {
         objIn.close()
     }

src/test/kotlin/com/fasterxml/jackson/module/kotlin/KotlinInstantiatorsTest.kt

@@ -1,8 +1,8 @@
 package com.fasterxml.jackson.module.kotlin
 
 import com.fasterxml.jackson.databind.deser.std.StdValueInstantiator
-import org.junit.Assert.*
-import org.junit.Test
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
 
 class KotlinInstantiatorsTest {
     private val mapper = jacksonObjectMapper()

src/test/kotlin/com/fasterxml/jackson/module/kotlin/KotlinModuleTest.kt

@@ -2,10 +2,10 @@ package com.fasterxml.jackson.module.kotlin
 
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.module.kotlin.KotlinFeature.*
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertFalse
-import org.junit.Assert.assertTrue
-import org.junit.Test
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertFalse
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.api.Test
 import kotlin.test.assertNotNull
 
 class KotlinModuleTest {

src/test/kotlin/com/fasterxml/jackson/module/kotlin/MissingKotlinParameterExceptionTest.kt

@@ -1,6 +1,6 @@
 package com.fasterxml.jackson.module.kotlin
 
-import org.junit.Test
+import org.junit.jupiter.api.Test
 import kotlin.test.assertNotNull
 import kotlin.test.assertNull
 

src/test/kotlin/com/fasterxml/jackson/module/kotlin/ReflectionCacheTest.kt

@@ -1,6 +1,6 @@
 package com.fasterxml.jackson.module.kotlin
 
-import org.junit.Test
+import org.junit.jupiter.api.Test
 import kotlin.test.assertNotNull
 
 class ReflectionCacheTest {

src/test/kotlin/com/fasterxml/jackson/module/kotlin/kogeraIntegration/deser/valueClass/JacksonInjectTest.kt

@@ -3,9 +3,9 @@ package com.fasterxml.jackson.module.kotlin.kogeraIntegration.deser.valueClass
 import com.fasterxml.jackson.annotation.JacksonInject
 import com.fasterxml.jackson.databind.InjectableValues
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertThrows
-import org.junit.Test
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertThrows
+import org.junit.jupiter.api.Test
 
 class JacksonInjectTest {
     // This is specified as a getter because there is a possibility of problems if it is assigned to a field.

src/test/kotlin/com/fasterxml/jackson/module/kotlin/kogeraIntegration/deser/valueClass/NullableObjectEdgeCases.kt

@@ -10,9 +10,9 @@ import com.fasterxml.jackson.module.kotlin.WrapsNullableValueClassDeserializer
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.fasterxml.jackson.module.kotlin.readValue
 import kotlin.reflect.jvm.internal.KotlinReflectionInternalError
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertThrows
-import org.junit.Test
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
 
 class NullableObjectEdgeCases {
     @JvmInline
@@ -61,7 +61,7 @@ class NullableObjectEdgeCases {
     // There is a problem with #51, so it is a failing test.
     @Test
     fun `Nulls_SKIP works`() {
-        assertThrows("#761(KT-57357) fixed", KotlinReflectionInternalError::class.java) {
+        assertThrows<KotlinReflectionInternalError>("#761(KT-57357) fixed") {
             val result = jacksonObjectMapper().readValue<NullsSkip>("""{"nn":null,"n":null}""")
             assertEquals(NullValue(VC("skip"), VC("skip")), result)
         }

src/test/kotlin/com/fasterxml/jackson/module/kotlin/kogeraIntegration/deser/valueClass/WithoutCustomDeserializeMethodTest.kt

@@ -3,24 +3,21 @@ package com.fasterxml.jackson.module.kotlin.kogeraIntegration.deser.valueClass
 import com.fasterxml.jackson.module.kotlin.defaultMapper
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.fasterxml.jackson.module.kotlin.readValue
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertThrows
-import org.junit.Assert.assertTrue
-import org.junit.Ignore
-import org.junit.experimental.runners.Enclosed
-import org.junit.runner.RunWith
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.api.Nested
+import org.junit.jupiter.api.assertThrows
+import org.junit.jupiter.api.Test
 import java.lang.reflect.InvocationTargetException
-import kotlin.test.Test
 
-@RunWith(Enclosed::class)
 class WithoutCustomDeserializeMethodTest {
-    @Ignore
     companion object {
         val mapper = jacksonObjectMapper()
         val throwable = IllegalArgumentException("test")
     }
 
-    class DirectDeserializeTest {
+    @Nested
+    inner class DirectDeserializeTest {
         @Test
         fun primitive() {
             val result = defaultMapper.readValue<Primitive>("1")
@@ -34,7 +31,8 @@ class WithoutCustomDeserializeMethodTest {
         }
 
         @Suppress("ClassName")
-        class NullableObject_ {
+        @Nested
+        inner class NullableObject_ {
             @Test
             fun value() {
                 val result = defaultMapper.readValue<NullableObject>(""""foo"""")
@@ -44,32 +42,14 @@ class WithoutCustomDeserializeMethodTest {
             // failing
             @Test
             fun nullString() {
-                // #209 has been fixed.
-                assertThrows(NullPointerException::class.java) {
+                org.junit.jupiter.api.assertThrows<NullPointerException>("#209 has been fixed.") {
                     val result = defaultMapper.readValue<NullableObject>("null")
                     assertEquals(NullableObject(null), result)
                 }
             }
         }
-
-        @Ignore
-        @JvmInline
-        value class HasCheckConstructor(val value: Int) {
-            init {
-                if (value < 0) throw throwable
-            }
-        }
-
-        @Test
-        fun callConstructorCheckTest() {
-            val e = assertThrows(InvocationTargetException::class.java) {
-                defaultMapper.readValue<HasCheckConstructor>("-1")
-            }
-            assertTrue(e.cause === throwable)
-        }
     }
 
-    @Ignore
     data class Dst(
         val pNn: Primitive,
         val pN: Primitive?,
@@ -79,39 +59,50 @@ class WithoutCustomDeserializeMethodTest {
         val noN: NullableObject?
     )
 
-    class InParameterDeserialize {
-        @Test
-        fun withoutNull() {
-            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)
+    @Test
+    fun withoutNull() {
+        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)
-        }
+        assertEquals(expected, result)
+    }
 
-        @Test
-        fun withNull() {
-            val expected = Dst(
-                Primitive(1),
-                null,
-                NonNullObject("foo"),
-                null,
-                NullableObject(null),
-                null
-            )
-            val src = mapper.writeValueAsString(expected)
-            val result = mapper.readValue<Dst>(src)
+    @Test
+    fun withNull() {
+        val expected = Dst(
+            Primitive(1),
+            null,
+            NonNullObject("foo"),
+            null,
+            NullableObject(null),
+            null
+        )
+        val src = mapper.writeValueAsString(expected)
+        val result = mapper.readValue<Dst>(src)
 
-            assertEquals(expected, result)
+        assertEquals(expected, result)
+    }
+
+    @JvmInline
+    value class HasCheckConstructor(val value: Int) {
+        init {
+            if (value < 0) throw throwable
         }
     }
 
+    @Test
+    fun callConstructorCheckTest() {
+        val e = assertThrows<InvocationTargetException> { defaultMapper.readValue<HasCheckConstructor>("-1") }
+        assertTrue(e.cause === throwable)
+    }
+
     // If all JsonCreator tests are OK, no need to check throws from factory functions.
 }

src/test/kotlin/com/fasterxml/jackson/module/kotlin/kogeraIntegration/deser/valueClass/defaultArgument/NonNullObjectTest.kt

@@ -4,8 +4,8 @@ import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.fasterxml.jackson.module.kotlin.kogeraIntegration.deser.valueClass.NonNullObject
 import com.fasterxml.jackson.module.kotlin.readValue
-import org.junit.Assert.assertEquals
-import org.junit.Test
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
 
 class NonNullObjectTest {
     companion object {

src/test/kotlin/com/fasterxml/jackson/module/kotlin/kogeraIntegration/deser/valueClass/defaultArgument/NullableObjectTest.kt

@@ -4,9 +4,9 @@ import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.fasterxml.jackson.module.kotlin.readValue
 import com.fasterxml.jackson.module.kotlin.kogeraIntegration.deser.valueClass.NullableObject
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertThrows
-import kotlin.test.Test
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertThrows
+import org.junit.jupiter.api.Test
 
 class NullableObjectTest {
     companion object {

src/test/kotlin/com/fasterxml/jackson/module/kotlin/kogeraIntegration/deser/valueClass/defaultArgument/PrimitiveTest.kt

@@ -4,8 +4,8 @@ import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.fasterxml.jackson.module.kotlin.kogeraIntegration.deser.valueClass.Primitive
 import com.fasterxml.jackson.module.kotlin.readValue
-import org.junit.Assert.assertEquals
-import org.junit.Test
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
 
 class PrimitiveTest {
     companion object {