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How to use mount method of io.kotest.core.extensions.MountableExtension class

Best Kotest code snippet using io.kotest.core.extensions.MountableExtension.mount

JdbcTestContainerExtension.kt

Source:JdbcTestContainerExtension.kt

...21 *22 * This extension will create a pooled [HikariDataSource] attached to the database and23 * return that to the user as the materialized value.24 *25 * The pool can be configured in the mount configure method.26 *27 * Note: This extension requires Kotest 5.0+28 *29 * @param container the specific test container type30 * @param lifecycleMode determines how the container should be reset between tests31 *32 * @since 1.1.033 */34class JdbcTestContainerExtension(35   private val container: JdbcDatabaseContainer<Nothing>,36   private val lifecycleMode: LifecycleMode = LifecycleMode.Spec,37) : MountableExtension<TestContainerHikariConfig, DataSource>, AfterSpecListener, TestListener {38   private val ds = SettableDataSource(null)39   private var configure: TestContainerHikariConfig.() -> Unit = {}40   override fun mount(configure: TestContainerHikariConfig.() -> Unit): DataSource {41      this.configure = configure42      if (lifecycleMode == LifecycleMode.Spec) {43         container.start()44         ds.setDataSource(createDataSource())45      }46      return ds47   }48   private fun createDataSource(): HikariDataSource {49      val config = TestContainerHikariConfig()50      config.jdbcUrl = container.jdbcUrl51      config.username = container.username52      config.password = container.password53      config.configure()54      val ds = HikariDataSource(config)...

SharedJdbcDatabaseContainerExtension.kt

Source:SharedJdbcDatabaseContainerExtension.kt

...52   BeforeSpecListener,53   AfterTestListener,54   AfterSpecListener {55   private var ds: HikariDataSource? = null56   override fun mount(configure: TestContainerHikariConfig.() -> Unit): HikariDataSource {57      if (!container.isRunning) {58         container.start()59         ds = createDataSource().apply(afterStart)60      }61      return ds ?: error("DataSource was not initialized")62   }63   override suspend fun afterProject() {64      if (container.isRunning) container.stop()65   }66   override suspend fun beforeTest(testCase: TestCase) {67      beforeTest(ds ?: error("DataSource was not initialized"))68   }69   override suspend fun afterTest(testCase: TestCase, result: TestResult) {70      afterTest(ds ?: error("DataSource was not initialized"))...

SharedTestContainerExtension.kt

Source:SharedTestContainerExtension.kt

...65            configure66         ) { this }67      }68   }69   override fun mount(configure: T.() -> Unit): U {70      if (!container.isRunning) {71         container.start()72         configure(container)73         this@SharedTestContainerExtension.configure(container)74      }75      return this@SharedTestContainerExtension.mapper(container)76   }77   override suspend fun afterProject() {78      if (container.isRunning) container.stop()79   }80   override suspend fun beforeTest(testCase: TestCase) {81      beforeTest(container)82   }83   override suspend fun afterTest(testCase: TestCase, result: TestResult) {...

TestContainerExtension.kt

Source:TestContainerExtension.kt

...21         TestContainerExtension(GenericContainer<Nothing>(name))22      operator fun invoke(name: String, lifecycleMode: LifecycleMode): TestContainerExtension<GenericContainer<Nothing>> =23         TestContainerExtension(GenericContainer<Nothing>(name), lifecycleMode)24   }25   override fun mount(configure: T.() -> Unit): T {26      (container as T).configure()27      if (lifecycleMode == LifecycleMode.Spec) {28         container.start()29      }30      return container31   }32   override suspend fun afterSpec(spec: Spec) {33      if (container.isRunning) {34         withContext(Dispatchers.IO) {35            stop()36         }37      }38   }39   override suspend fun beforeAny(testCase: TestCase) {...

MountableExtensionTest.kt

Source:MountableExtensionTest.kt

...6import io.kotest.core.spec.style.FunSpec7import io.kotest.matchers.shouldBe8import java.util.concurrent.atomic.AtomicBoolean9class MountableExtensionTest : FunSpec() {10   private val mountable = MyMountable()11   private val control = install(mountable) {12      a = "bar"13   }14   init {15      test("mountable extensions should invoke configuration block") {16         control.a shouldBe "bar"17      }18      test("mountable extensions should be installed as regular extensions") {19         mountable.before.get() shouldBe true20      }21   }22}23data class Config(var a: String)24class MyMountable : MountableExtension<Config, Config>, BeforeSpecListener {25   val before = AtomicBoolean(false)26   override suspend fun beforeSpec(spec: Spec) {27      before.set(true)28   }29   override fun mount(configure: (Config) -> Unit): Config {30      val config = Config("foo")31      configure(config)32      return config33   }34}...

MountableExtension.kt

Source:MountableExtension.kt

...21 *22 */23interface MountableExtension<CONFIG, MATERIALIZED> : Extension {24   // cannot be suspending as it is invoked by install that is used in constructors25   fun mount(configure: CONFIG.() -> Unit): MATERIALIZED26}27// cannot be suspending as it is used in constructors28fun <CONFIG, MATERIALIZED> Spec.install(29   mountable: MountableExtension<CONFIG, MATERIALIZED>,30   configure: CONFIG.() -> Unit = {}31): MATERIALIZED {32   extensions(mountable)33   return mountable.mount(configure)34}...

mount

Using AI Code Generation

1val extension = MountableExtension { mount ->2   }3}4val extension = Extension { mount ->5   }6}7val listener = MountableListener { mount ->8   }9}10val listener = Listener { mount ->11   }12}13val spec = MountableSpec { mount ->14   }15}16val spec = Spec { mount ->17   }18}19val test = MountableTest { mount ->20   }21}22val test = Test { mount ->23   }24}25val testCase = MountableTestCase { mount ->26   }27}

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