Fix a few issues related to Dapr container usage in ITs.

Signed-off-by: Artur Ciocanu <artur.ciocanu@gmail.com>

Author: artur-ciocanu

sdk-tests/src/test/java/io/dapr/it/testcontainers/actors/DaprActorsIT.java

@@ -20,6 +20,7 @@
 import io.dapr.testcontainers.Component;
 import io.dapr.testcontainers.DaprContainer;
 import io.dapr.testcontainers.DaprLogLevel;
+import io.dapr.testcontainers.spring.DaprContainerFactory;
 import io.dapr.testcontainers.spring.DaprSidecarContainer;
 import io.dapr.testcontainers.spring.DaprSpringBootTest;
 import org.junit.jupiter.api.BeforeEach;
@@ -40,7 +41,7 @@ public class DaprActorsIT {
   private static final String ACTORS_MESSAGE_PATTERN = ".*Actor runtime started.*";
 
   @DaprSidecarContainer
-  private static final DaprContainer DAPR_CONTAINER = DaprContainer.createForSpringBootTest("actor-dapr-app")
+  private static final DaprContainer DAPR_CONTAINER = DaprContainerFactory.createForSpringBootTest("actor-dapr-app")
       .withComponent(new Component("kvstore", "state.in-memory", "v1",
           Map.of("actorStateStore", "true")))
       .withDaprLogLevel(DaprLogLevel.DEBUG)

sdk-tests/src/test/java/io/dapr/testcontainers/spring/DaprContainerFactory.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2025 The Dapr Authors
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package io.dapr.testcontainers.spring;
+
+import io.dapr.testcontainers.DaprContainer;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+
+import static io.dapr.testcontainers.DaprContainerConstants.DAPR_RUNTIME_IMAGE_TAG;
+
+/**
+ * Factory for creating DaprContainer instances configured for Spring Boot integration tests.
+ *
+ * <p>This class handles the common setup required for bidirectional communication
+ * between Spring Boot applications and the Dapr sidecar in test scenarios.</p>
+ */
+public final class DaprContainerFactory {
+
+  private DaprContainerFactory() {
+    // Utility class
+  }
+
+  /**
+   * Creates a DaprContainer pre-configured for Spring Boot integration tests.
+   * This factory method handles the common setup required for bidirectional
+   * communication between Spring Boot and the Dapr sidecar:
+   * <ul>
+   *   <li>Allocates a free port for the Spring Boot application</li>
+   *   <li>Configures the app channel address for container-to-host communication</li>
+   * </ul>
+   *
+   * @param appName the Dapr application name
+   * @return a pre-configured DaprContainer for Spring Boot tests
+   */
+  public static DaprContainer createForSpringBootTest(String appName) {
+    int port = allocateFreePort();
+
+    return new DaprContainer(DAPR_RUNTIME_IMAGE_TAG)
+        .withAppName(appName)
+        .withAppPort(port)
+        .withAppChannelAddress("host.testcontainers.internal");
+  }
+
+  private static int allocateFreePort() {
+    try (ServerSocket socket = new ServerSocket(0)) {
+      socket.setReuseAddress(true);
+      return socket.getLocalPort();
+    } catch (IOException e) {
+      throw new IllegalStateException("Failed to allocate free port", e);
+    }
+  }
+}

testcontainers-dapr/src/main/java/io/dapr/testcontainers/DaprContainer.java

@@ -30,7 +30,6 @@
 import org.yaml.snakeyaml.Yaml;
 
 import java.io.IOException;
-import java.net.ServerSocket;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
@@ -106,43 +105,6 @@ public DaprContainer(String image) {
     this(DockerImageName.parse(image));
   }
 
-  /**
-   * Creates a DaprContainer pre-configured for Spring Boot integration tests.
-   * This factory method handles the common setup required for bidirectional
-   * communication between Spring Boot and the Dapr sidecar:
-   * <ul>
-   *   <li>Allocates a free port for the Spring Boot application</li>
-   *   <li>Configures the app channel address for container-to-host communication</li>
-   * </ul>
-   *
-   * <p>Example usage:</p>
-   * <pre>{@code
-   * @Container
-   * private static final DaprContainer DAPR = DaprContainer.createForSpringBootTest("my-app")
-   *     .withComponent(new Component("statestore", "state.in-memory", "v1", Map.of()));
-   * }</pre>
-   *
-   * @param appName the Dapr application name
-   * @return a pre-configured DaprContainer for Spring Boot tests
-   */
-  public static DaprContainer createForSpringBootTest(String appName) {
-    int port = allocateFreePort();
-
-    return new DaprContainer(DAPR_RUNTIME_IMAGE_TAG)
-        .withAppName(appName)
-        .withAppPort(port)
-        .withAppChannelAddress("host.testcontainers.internal");
-  }
-
-  private static int allocateFreePort() {
-    try (ServerSocket socket = new ServerSocket(0)) {
-      socket.setReuseAddress(true);
-      return socket.getLocalPort();
-    } catch (IOException e) {
-      throw new IllegalStateException("Failed to allocate free port", e);
-    }
-  }
-
   public Configuration getConfiguration() {
     return configuration;
   }