Started working on the socat container, to replace toxiproxy

src/main/kotlin/dev/restate/sdktesting/infra/SocatContainer.kt

@@ -0,0 +1,43 @@
+// Copyright (c) 2023 - Restate Software, Inc., Restate GmbH
+//
+// This file is part of the Restate SDK Test suite tool,
+// which is released under the MIT license.
+//
+// You can find a copy of the license in file LICENSE in the root
+// directory of this repository or package, or at
+// https://github.com/restatedev/sdk-test-suite/blob/main/LICENSE
+package dev.restate.sdktesting.infra
+
+import org.apache.logging.log4j.LogManager
+import org.testcontainers.containers.GenericContainer
+import org.testcontainers.containers.Network
+import org.testcontainers.utility.DockerImageName
+
+class SocatContainer(listenPort: Int, targetHost: String, targetPort: Int, exposeOnHost: Boolean) :
+    GenericContainer<RestateContainer>(DockerImageName.parse("docker.io/alpine/socat")) {
+
+  companion object {
+    private val LOG = LogManager.getLogger(SocatContainer::class.java)
+  }
+
+  init {
+    val networkAlias = "socat-$targetHost-$targetPort"
+
+    this.network = network
+    this.networkAliases = arrayListOf(networkAlias)
+    withStartupAttempts(3)
+
+    if (exposeOnHost) {
+      LOG.info("Going to expose {}:{} on localhost:{}", networkAlias, listenPort, listenPort)
+      super.addFixedExposedPort(listenPort, listenPort)
+    }
+
+    withCommand("tcp-listen:$listenPort,fork,reuseaddr tcp-connect:$targetHost:$targetPort")
+  }
+
+  internal fun start(network: Network, testReportDir: String) {
+    this.withNetwork(network)
+        .withLogConsumer(ContainerLogger(testReportDir, this.networkAliases[0]!!))
+        .start()
+  }
+}