test: 何故かユニークインデックス違反でコケるのでテストごとにDBを初期化するように

src/test/kotlin/dev/usbharu/hideout/repository/UserRepositoryTest.kt

@@ -7,27 +7,40 @@ import dev.usbharu.hideout.domain.model.Users
 import dev.usbharu.hideout.domain.model.UsersFollowers
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.test.runTest
+import org.jetbrains.exposed.sql.Database
 import org.jetbrains.exposed.sql.SchemaUtils
 import org.jetbrains.exposed.sql.select
-import org.jetbrains.exposed.sql.transactions.experimental.newSuspendedTransaction
-import org.junit.jupiter.api.Assertions.*
-import org.junit.jupiter.api.BeforeAll
+import org.jetbrains.exposed.sql.transactions.transaction
+import org.junit.jupiter.api.AfterEach
+import org.junit.jupiter.api.Assertions.assertIterableEquals
+import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
-import org.junit.jupiter.api.TestInstance
-import utils.DatabaseTestBase
 
-@TestInstance(TestInstance.Lifecycle.PER_CLASS)
-class UserRepositoryTest : DatabaseTestBase() {
 
-    @BeforeAll
-    fun beforeAll() {
+class UserRepositoryTest {
+
+    lateinit var db: Database
+
+    @BeforeEach
+    fun beforeEach() {
+        db = Database.connect("jdbc:h2:mem:test;DB_CLOSE_DELAY=-1", driver = "org.h2.Driver")
+        transaction(db) {
             SchemaUtils.create(Users)
             SchemaUtils.create(UsersFollowers)
         }
+    }
+
+    @AfterEach
+    fun tearDown() {
+        transaction(db) {
+
+            SchemaUtils.drop(UsersFollowers)
+            SchemaUtils.drop(Users)
+        }
+    }
 
     @Test
     fun `findFollowersById フォロワー一覧を取得`() = runTest {
-        newSuspendedTransaction {
         val userRepository = UserRepository(db)
         val user = userRepository.create(
             User(
@@ -67,12 +80,11 @@ class UserRepositoryTest : DatabaseTestBase() {
         userRepository.findFollowersById(user.id).let {
             assertIterableEquals(listOf(follower, follower2), it)
         }
-        }
+
     }
 
     @Test
     fun `createFollower フォロワー追加`() = runTest {
-        newSuspendedTransaction {
         val userRepository = UserRepository(db)
         val user = userRepository.create(
             User(
@@ -97,8 +109,12 @@ class UserRepositoryTest : DatabaseTestBase() {
             )
         )
         userRepository.createFollower(user.id, follower.id)
-            val followerIds = UsersFollowers.select { UsersFollowers.userId eq user.id }.map { it[UsersFollowers.followerId] }
+        transaction {
+
+            val followerIds =
+                UsersFollowers.select { UsersFollowers.userId eq user.id }.map { it[UsersFollowers.followerId] }
             assertIterableEquals(listOf(follower.id), followerIds)
         }
+
     }
 }