kotlin
書いてて、mockito-inline
の mockStatic
を使おうとして
少し時間無駄にしたので、他の人が同じことで時間を無駄にしないように書いとく
tl;dr
@JvmStatic
のAnnotationをつける必要がある
普通に考えれば当たり前なんだけど、つけ忘れてた時にエラー出てなんでだっけ?ってなる
object ExampleObject {
@JvmStatic
fun static(): String {
return "static"
}
}
なぜか
じゃないとバイトコードになった時に static
にならないので結果としてmock出来ずに失敗する
public final class com/example/springkotlin/utils/ExampleObject {
public final static static()Ljava/lang/String;
@Lkotlin/jvm/JvmStatic;()
@Lorg/jetbrains/annotations/NotNull;()
L0
LINENUMBER 6 L0
LDC "static"
ARETURN
L1
MAXSTACK = 1
MAXLOCALS = 0
public final notStatic()Ljava/lang/String;
@Lorg/jetbrains/annotations/NotNull;()
L0
LINENUMBER 10 L0
LDC "notStatic"
ARETURN
L1
LOCALVARIABLE this Lcom/example/springkotlin/utils/ExampleObject; L0 L1 0
MAXSTACK = 1
MAXLOCALS = 1
private <init>()V
L0
LINENUMBER 3 L0
ALOAD 0
INVOKESPECIAL java/lang/Object.<init> ()V
RETURN
L1
LOCALVARIABLE this Lcom/example/springkotlin/utils/ExampleObject; L0 L1 0
MAXSTACK = 1
MAXLOCALS = 1
public final static Lcom/example/springkotlin/utils/ExampleObject; INSTANCE
@Lorg/jetbrains/annotations/NotNull;()
static <clinit>()V
L0
LINENUMBER 3 L0
NEW com/example/springkotlin/utils/ExampleObject
DUP
INVOKESPECIAL com/example/springkotlin/utils/ExampleObject.<init> ()V
ASTORE 0
ALOAD 0
PUTSTATIC com/example/springkotlin/utils/ExampleObject.INSTANCE : Lcom/example/springkotlin/utils/ExampleObject;
RETURN
MAXSTACK = 2
MAXLOCALS = 1
@Lkotlin/Metadata;(mv={1, 6, 0}, k=1, d1={"\u0000\u0014\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0002\u0008\u0002\n\u0002\u0010\u000e\n\u0002\u0008\u0002\u0008\u00c6\u0002\u0018\u00002\u00020\u0001B\u0007\u0008\u0002\u00a2\u0006\u0002\u0010\u0002J\u0006\u0010\u0003\u001a\u00020\u0004J\u0008\u0010\u0005\u001a\u00020\u0004H\u0007\u00a8\u0006\u0006"}, d2={"Lcom/example/springkotlin/utils/ExampleObject;", "", "()V", "notStatic", "", "static", "spring-kotlin"})
}
エラー
エラーとしてはこんなのが出るけどぱっと見ですぐに気がつきにくい
when() requires an argument which has to be 'a method call on a mock'.
For example:
when(mock.getArticles()).thenReturn(articles);
Also, this error might show up because:
1. you stub either of: final/private/equals()/hashCode() methods.
Those methods *cannot* be stubbed/verified.
Mocking methods declared on non-public parent classes is not supported.
2. inside when() you don't call method on mock but on some other object.
org.mockito.exceptions.misusing.MissingMethodInvocationException:
when() requires an argument which has to be 'a method call on a mock'.
For example:
when(mock.getArticles()).thenReturn(articles);
Also, this error might show up because:
1. you stub either of: final/private/equals()/hashCode() methods.
Those methods *cannot* be stubbed/verified.
Mocking methods declared on non-public parent classes is not supported.
2. inside when() you don't call method on mock but on some other object.
コード
package com.example.springkotlin.utils
object ExampleObject {
@JvmStatic
fun static(): String {
return "static"
}
fun notStatic(): String {
return "notStatic"
}
}
テスト
package com.example.springkotlin.utils
import org.junit.jupiter.api.Assertions.assertEquals
import org.junit.jupiter.api.Test
import org.mockito.Mockito.mockStatic
class ExampleObjectTest {
@Test
fun test() {
val mocked = mockStatic(ExampleObject::class.java)
mocked.`when`<String>(ExampleObject::static).thenReturn("mocked")
assertEquals("mocked", ExampleObject.static())
mocked.close()
}
}