add call test for MethodValueCreator

Author: k163377

pom.xml

@@ -111,6 +111,13 @@
             <artifactId>jackson-dataformat-xml</artifactId>
             <scope>test</scope>
         </dependency>
+        <!-- https://mvnrepository.com/artifact/io.mockk/mockk -->
+        <dependency>
+            <groupId>io.mockk</groupId>
+            <artifactId>mockk</artifactId>
+            <version>1.12.2</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>

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

@@ -0,0 +1,40 @@
+package com.fasterxml.jackson.module.kotlin
+
+import io.mockk.spyk
+import io.mockk.verify
+import org.junit.Test
+import kotlin.reflect.KFunction
+import kotlin.reflect.full.functions
+import kotlin.test.assertEquals
+
+class MethodValueCreatorTest {
+    data class Data(val value: Int) {
+        companion object {
+            fun target(value: Int = -1) = Data(value)
+        }
+    }
+
+    companion object {
+        private val targetFunction: KFunction<*> = spyk(Data.Companion::class.functions.first { it.name == "target" })
+        private val methodValueCreator = MethodValueCreator.of(targetFunction)!!
+    }
+
+    @Test
+    fun withDefaultValue() {
+        val actual = methodValueCreator.generateBucket().let { methodValueCreator.callBy(it) }
+        assertEquals(Data(-1), actual)
+        verify(exactly = 1) { targetFunction.callBy(any()) }
+    }
+
+    @Test
+    fun withoutDefaultValue() {
+        val actual = methodValueCreator.generateBucket().let {
+            it[1] = 1
+            methodValueCreator.callBy(it)
+        }
+        assertEquals(Data(1), actual)
+        // If the argument is fully initialized, call is used instead of callBy
+        verify(exactly = 1) { targetFunction.call(*anyVararg()) }
+        verify(exactly = 0) { targetFunction.callBy(any()) }
+    }
+}