Implement embedded kafka as extension

Makes it easier to use the embedded kafka container.

src/test/kotlin/EmbeddedKafkaExtension.kt

+/*
+ * sftp-reader
+ * Copyright (C) 2020 Memoriav
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.memobase
+
+import org.junit.jupiter.api.extension.BeforeAllCallback
+import org.junit.jupiter.api.extension.ExtensionContext
+
+class EmbeddedKafkaExtension : BeforeAllCallback {
+
+    lateinit var kafka: KafkaEmbedded
+
+    private val testTopic: String = "test"
+    private val port: Int = 12345
+
+    override fun beforeAll(context: ExtensionContext?) {
+        kafka = KafkaEmbedded(port, testTopic)
+        val wrapper = KafkaWrapper(kafka)
+
+        if (context != null) {
+            context.getStore(ExtensionContext.Namespace.create(EmbeddedKafkaExtension::class.java))
+                .put("redis", wrapper)
+            Runtime.getRuntime().addShutdownHook(Thread(Runnable {
+                wrapper.close()
+            }))
+        }
+    }
+
+    class KafkaWrapper(private val embedded: KafkaEmbedded) : ExtensionContext.Store.CloseableResource {
+        override fun close() {
+            embedded.close()
+        }
+    }
+}

src/test/kotlin/SftpServerExtension.kt

+/*
+ * sftp-reader
+ * Copyright (C) 2020 Memoriav
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.memobase
+
+import org.junit.jupiter.api.extension.BeforeAllCallback
+import org.junit.jupiter.api.extension.ExtensionContext
+
+class SftpServerExtension : BeforeAllCallback {
+    override fun beforeAll(context: ExtensionContext?) {
+        TODO("Not yet implemented")
+    }
+
+    class SftpServerWrapper(private val embedded: KafkaEmbedded) : ExtensionContext.Store.CloseableResource {
+        override fun close() {
+            embedded.close()
+        }
+    }
+}

src/test/kotlin/Tests.kt

@@ -17,24 +17,15 @@
  */
 package org.memobase
 
-import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.TestInstance
-import org.junit.jupiter.api.assertAll
+import org.junit.jupiter.api.extension.ExtendWith
 
+@ExtendWith(EmbeddedKafkaExtension::class)
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
 class Tests {
 
-    private val kafkaEmbedded = KafkaEmbedded(12301, "test")
-    private val testResourceCsv = ClassLoader.getSystemResourceAsStream("test.csv")
-
     @Test
     fun testValidCsvSend() {
-        kafkaEmbedded.use {
-            assertAll("test case 1",
-                { assertEquals("null", "null") },
-                { assertEquals("null", "null") }
-            )
-        }
     }
 }