Mockitoのデバッグ: Gradleプラグインテストにおける"Wanted but not invoked"エラーの解決

@startuml
actor Test
participant "project.plugins" as PP
participant "モックプラグインコンテナ" as MPC
participant "ベーカリープラグイン" as BP

Test -> Test: createMockProject()
activate Test
Test -> MPC: create mock
Test -> PP: doReturn mockPluginContainer
Test --> Test: return project
deactivate Test

Test -> BP: apply(project)
activate BP
BP -> PP: project.plugins
PP --> BP: returns mockPluginContainer
BP -> MPC: apply(JBakePlugin::class.java)
deactivate BP

Test -> PP: verify(project.plugins).apply(...)
note right
  ❌ ÉCHEC !
  Mockito vérifie "project.plugins"
  mais l'interaction a eu lieu sur
  "モックプラグインコンテナ"
end note
@enduml

private fun createMockProject(): Pair<Project, PluginContainer> {
    val mockPluginContainer = mock<PluginContainer>()
    val mockProject = mock<Project> {
        on { plugins } doReturn mockPluginContainer
    }
    return Pair(mockProject, mockPluginContainer)
}

@Test
fun `plugin applies jbake gradle plugin`() {
    val (project, mockPluginContainer) = createMockProject()
    val plugin = BakeryPlugin()

    plugin.apply(project)

    // ✅ Vérification directe sur le bon mock
    verify(mockPluginContainer).apply(JBakePlugin::class.java)
}

UnfinishedStubbingException:
Unfinished stubbing detected here
Hints:
 3. you are stubbing the behaviour of another mock inside
    before 'thenReturn' instruction is completed

val mockProject = mock<Project> {
    on { extensions } doReturn mockExtensionContainer
    on { plugins } doReturn mockPluginContainer
    on { logger } doReturn mock()  // ❌ PROBLÈME ICI !
}

@startuml
participant "モキト" as M
participant "モックビルダー" as MB
participant "インライン モック" as IM

M -> MB: mock<Project> { ... }
activate MB
MB -> MB: on { logger } doReturn
MB -> IM: mock()
activate IM
note right
  ❌ Création d'un nouveau mock
  PENDANT le stubbing en cours !

  Mockito perd le contexte
  du stubbing parent
end note
IM --> MB: nouveau mock
deactivate IM
MB -x M: UnfinishedStubbingException
deactivate MB
@enduml

private fun createMockProject(): Pair<Project, PluginContainer> {
    // 1️⃣ Créer TOUS les mocks d'abord
    val mockPluginContainer = mock<PluginContainer>()
    val mockExtensionContainer = mock<ExtensionContainer>()
    val mockLogger = mock<org.gradle.api.logging.Logger>()
    val mockProject = mock<Project>()

    // 2️⃣ Configurer les mocks séparément avec whenever()
    whenever(mockProject.plugins).thenReturn(mockPluginContainer)
    whenever(mockProject.extensions).thenReturn(mockExtensionContainer)
    whenever(mockProject.logger).thenReturn(mockLogger)

    return Pair(mockProject, mockPluginContainer)
}

// Dans BakeryPlugin.kt
if (!project.layout.projectDirectory.asFile
        .resolve(extension.configPath.get()).exists()) {
    println("config file does not exists")
    return@afterEvaluate  // ❌ Sort avant d'appliquer JBake !
}

@startuml
participant "ベーカリープラグイン" as BP
participant "プロジェクトレイアウト" as PL
participant "�拡張" as EXT
participant "ファイルシステム" as FS

BP -> PL: layout.projectDirectory.asFile
PL --> BP: /some/mock/path
BP -> EXT: extension.configPath.get()
EXT --> BP: "../../site.yml"
BP -> BP: resolve("../../site.yml")
BP -> FS: exists() ?
FS --> BP: false ❌
BP -> BP: return (skip JBake)
note right
  Le plugin ne trouve pas
  le fichier et sort
  avant d'appliquer JBake
end note
@enduml

private fun createMockProject(): Pair<Project, PluginContainer> {
    // ... autres mocks ...

    val configFile = File("../../site.yml").canonicalFile
    val projectDir = configFile.parentFile

    // Configuration cohérente des chemins
    whenever(mockConfigPathProperty.get()).thenReturn("site.yml")
    whenever(mockProjectDirectory.asFile).thenReturn(projectDir)

    // Maintenant : projectDir.resolve("site.yml") existe ! ✅
}

@startuml
!define SUCCESS #90EE90
!define PROBLEM #FFB6C1

rectangle "モック設定" {
    card "projectDirectory.asFile" SUCCESS
    card "戻り値: /real/path/to/project" SUCCESS

    card "configPath.get()" SUCCESS
    card "戻り値: site.yml" SUCCESS

    card "解決()" SUCCESS
    card "/real/path/to/project/site.yml" SUCCESS

    card "存在する()" SUCCESS
    card "真 ✅" SUCCESS
}
@enduml

project.afterEvaluate {
    // ...
    project.tasks.withType(JBakeTask::class.java)
        .getByName("bake").apply {
            output = project.layout.buildDirectory
                .dir(site.bake.destDirPath)  // ❌ NPE ici !
                .get()
                .asFile
        }
}

private fun createMockProject(): Pair<Project, PluginContainer> {
    // ... autres mocks ...

    val mockBuildDirectory = mock<DirectoryProperty>()
    val buildDir = File(projectDir, "build")

    // Mocker dir() pour retourner un Provider valide
    whenever(mockBuildDirectory.dir(any<String>())).doAnswer { invocation ->
        val path = invocation.arguments[0] as String
        val mockDirProvider = mock<Provider<Directory>>()
        val mockDir = mock<Directory>()

        whenever(mockDir.asFile).thenReturn(File(buildDir, path))
        whenever(mockDirProvider.get()).thenReturn(mockDir)

        mockDirProvider
    }

    // Mocker afterEvaluate pour exécution immédiate
    whenever(mockProject.afterEvaluate(any<Action<Project>>())).doAnswer { invocation ->
        val action = invocation.arguments[0] as Action<Project>
        action.execute(mockProject)  // ✅ Exécution synchrone
        null
    }

    return Pair(mockProject, mockPluginContainer)
}

@startuml
participant "テスト" as T
participant "ベーカリープラグイン" as BP
participant "モックプロジェクト" as MP
participant "評価後のアクション" as AE

T -> BP: apply(project)
activate BP
BP -> MP: afterEvaluate { ... }
activate MP
note right
  Mock configuré pour
  exécuter immédiatement
end note
MP -> AE: execute(project)
activate AE
AE -> MP: layout.buildDirectory.dir("焼く")
MP --> AE: Provider<Directory> ✅
AE -> MP: plugins.apply(JBakePlugin)
deactivate AE
MP --> BP:
deactivate MP
BP --> T:
deactivate BP

T -> T: verify(mockPluginContainer).apply(...)
note right: ✅ SUCCÈS !
@enduml

// ❌ FAUX
verify(project.plugins).apply(JBakePlugin::class.java)

// ✅ CORRECT
val (project, mockPluginContainer) = createMockProject()
verify(mockPluginContainer).apply(JBakePlugin::class.java)

// ❌ FAUX - UnfinishedStubbingException
val mockProject = mock<Project> {
    on { logger } doReturn mock()  // Nested mock creation !
}

// ✅ CORRECT - Créer séparément
val mockLogger = mock<org.gradle.api.logging.Logger>()
val mockProject = mock<Project>()
whenever(mockProject.logger).thenReturn(mockLogger)

// ✅ afterEvaluate doit s'exécuter pour les tests
whenever(mockProject.afterEvaluate(any())).doAnswer { invocation ->
    val action = invocation.arguments[0] as Action<Project>
    action.execute(mockProject)
    null
}

// Toujours vérifier que les chemins se résolvent correctement
val extension = project.extensions.getByType(BakeryExtension::class.java)
val configPath = extension.configPath.get()
val projectDir = project.layout.projectDirectory.asFile
val resolvedConfig = projectDir.resolve(configPath)

println("Resolved config: ${resolvedConfig.absolutePath}")
println("Exists: ${resolvedConfig.exists()}")