スコープ修正 + テスト追加 + Kotlinアップデート

build.gradle.kts

@@ -1,7 +1,7 @@
 plugins {
     id("maven")
     id("java")
-    id("org.jetbrains.kotlin.jvm") version "1.3.61"
+    id("org.jetbrains.kotlin.jvm") version "1.3.70"
     id("org.jlleitschuh.gradle.ktlint") version "9.2.1"
 }
 
@@ -18,7 +18,7 @@ buildscript {
     }
 
     dependencies {
-        classpath(kotlin("gradle-plugin", version = "1.3.61"))
+        classpath(kotlin("gradle-plugin", version = "1.3.70"))
     }
 }
 

src/main/kotlin/com/mapk/core/ArgumentBucket.kt

@@ -1,7 +1,7 @@
 package com.mapk.core
 
-class ArgumentBucket(
-    val bucket: Array<Any?>,
+class ArgumentBucket internal constructor(
+    internal val bucket: Array<Any?>,
     private var initializeStatus: Int,
     private val initializeMask: List<Int>,
     // clone時の再計算を避けるため1回で済むようにデフォルト値化

src/main/kotlin/com/mapk/core/KFunctionForCall.kt

@@ -8,9 +8,10 @@ class KFunctionForCall<T>(private val function: KFunction<T>, instance: Any? = n
     val parameters: List<KParameter> = function.parameters
     private val originalArgumentBucket: ArgumentBucket
 
-    fun getArgumentBucket(): ArgumentBucket = originalArgumentBucket.clone()
-
     init {
+        if (parameters.isEmpty() || (instance != null && parameters.size == 1))
+            throw IllegalArgumentException("This function is not require arguments.")
+
         // この関数には確実にアクセスするためアクセシビリティ書き換え
         function.isAccessible = true
         originalArgumentBucket = if (instance != null) {
@@ -32,6 +33,8 @@ class KFunctionForCall<T>(private val function: KFunction<T>, instance: Any? = n
         }
     }
 
+    fun getArgumentBucket(): ArgumentBucket = originalArgumentBucket.clone()
+
     fun call(argumentBucket: ArgumentBucket): T {
         return function.call(*argumentBucket.bucket)
     }

src/test/kotlin/com/mapk/core/KFunctionForCallTest.kt

@@ -0,0 +1,36 @@
+package com.mapk.core
+
+import org.junit.jupiter.api.DisplayName
+import org.junit.jupiter.api.Nested
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertDoesNotThrow
+import org.junit.jupiter.api.assertThrows
+
+class KFunctionForCallTest {
+    @Nested
+    @DisplayName("初期化関連テスト")
+    inner class InitializeTest {
+        // 空引数の関数
+        private fun dummy1() {}
+        @Suppress("UNUSED_PARAMETER")
+        private fun dummy2(input: Int) {}
+
+        @Test
+        @DisplayName("不正な関数を入力した場合")
+        fun withNoInstance() {
+            assertThrows<IllegalArgumentException> { KFunctionForCall(this::dummy1) }
+        }
+
+        @Test
+        @DisplayName("不正な関数を入力した場合（インスタンス付き = ファクトリーメソッド想定）")
+        fun withInstance() {
+            assertThrows<IllegalArgumentException> { KFunctionForCall(this::dummy2, object {}) }
+        }
+
+        @Test
+        @DisplayName("正常入力")
+        fun isValid() {
+            assertDoesNotThrow { KFunctionForCall(this::dummy2) }
+        }
+    }
+}