docs: remove JUnit 4 references

docs/examples/junit5/generic/build.gradle

@@ -0,0 +1,24 @@
+description = "Examples for docs"
+
+buildDir = "$rootDir/build/docs-examples/junit5/generic"
+
+dependencies {
+    testImplementation project(":testcontainers")
+    testImplementation project(":testcontainers-junit-jupiter")
+    testImplementation project(":testcontainers-selenium")
+    testImplementation project(":testcontainers-mysql")
+
+    testRuntimeOnly 'com.mysql:mysql-connector-j:8.2.0'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter:5.13.4'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher:1.10.3'
+    testImplementation "org.seleniumhq.selenium:selenium-api:4.35.0"
+    testImplementation 'org.assertj:assertj-core:3.27.4'
+}
+
+test {
+    useJUnitPlatform()
+    // Keep these generic snippets compile-checked without starting every referenced container in docs CI.
+    enabled = false
+}
+
+check.dependsOn(testClasses)

docs/examples/junit4/generic/src/test/java/generic/CmdModifierTest.java → docs/examples/junit5/generic/src/test/java/generic/CmdModifierTest.java

@@ -2,22 +2,23 @@
 
 import com.github.dockerjava.api.DockerClient;
 import com.github.dockerjava.api.model.Info;
-import org.junit.Rule;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.testcontainers.DockerClientFactory;
-import org.testcontainers.containers.Container;
 import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
 import org.testcontainers.utility.DockerImageName;
 
 import java.io.IOException;
 import java.util.Objects;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+@Testcontainers
 public class CmdModifierTest {
 
     // hostname {
-    @Rule
+    @Container
     public GenericContainer theCache = new GenericContainer<>(DockerImageName.parse("redis:6-alpine"))
         .withCreateContainerCmdModifier(cmd -> cmd.withHostName("the-cache"));
 
@@ -29,7 +30,7 @@ public class CmdModifierTest {
 
     private long memorySwapInBytes = 64l * 1024l * 1024l;
 
-    @Rule
+    @Container
     public GenericContainer memoryLimitedRedis = new GenericContainer<>(DockerImageName.parse("redis:6-alpine"))
         .withCreateContainerCmdModifier(cmd -> {
             cmd.getHostConfig()
@@ -42,13 +43,16 @@ public class CmdModifierTest {
 
     @Test
     public void testHostnameModified() throws IOException, InterruptedException {
-        final Container.ExecResult execResult = theCache.execInContainer("hostname");
+        final org.testcontainers.containers.Container.ExecResult execResult = theCache.execInContainer("hostname");
         assertThat(execResult.getStdout().trim()).isEqualTo("the-cache");
     }
 
     @Test
     public void testMemoryLimitModified() throws IOException, InterruptedException {
-        final Container.ExecResult execResult = memoryLimitedRedis.execInContainer("cat", getMemoryLimitFilePath());
+        final org.testcontainers.containers.Container.ExecResult execResult = memoryLimitedRedis.execInContainer(
+            "cat",
+            getMemoryLimitFilePath()
+        );
         assertThat(execResult.getStdout().trim()).isEqualTo(String.valueOf(memoryInBytes));
     }
 

docs/examples/junit4/generic/src/test/java/generic/CommandsTest.java → docs/examples/junit5/generic/src/test/java/generic/CommandsTest.java

@@ -1,15 +1,17 @@
 package generic;
 
-import org.junit.Rule;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
 import org.testcontainers.utility.DockerImageName;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+@Testcontainers
 public class CommandsTest {
 
-    @Rule
+    @Container
     // startupCommand {
     public GenericContainer redisWithCustomPort = new GenericContainer(DockerImageName.parse("redis:6-alpine"))
         .withCommand("redis-server --port 7777")

docs/examples/junit4/generic/src/test/java/generic/ContainerCreationTest.java → docs/examples/junit5/generic/src/test/java/generic/ContainerCreationTest.java

@@ -1,19 +1,21 @@
 package generic;
 
-import org.junit.ClassRule;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
 import org.testcontainers.utility.DockerImageName;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+@Testcontainers
 public class ContainerCreationTest {
 
     // spotless:off
     // simple {
     public static final DockerImageName REDIS_IMAGE = DockerImageName.parse("redis:6-alpine");
 
-    @ClassRule
+    @Container
     public static GenericContainer<?> redis = new GenericContainer<>(REDIS_IMAGE)
         .withExposedPorts(6379);
 
@@ -27,7 +29,7 @@ public class ContainerCreationTest {
     // Set up a plain OS container and customize environment,
     //   command and exposed ports. This just listens on port 80
     //   and always returns '42'
-    @ClassRule
+    @Container
     public static GenericContainer<?> alpine = new GenericContainer<>(ALPINE_IMAGE)
         .withExposedPorts(80)
         .withEnv("MAGIC_NUMBER", "42")

docs/examples/junit4/generic/src/test/java/generic/DependsOnTest.java → docs/examples/junit5/generic/src/test/java/generic/DependsOnTest.java

@@ -1,18 +1,20 @@
 package generic;
 
-import org.junit.Rule;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+@Testcontainers
 public class DependsOnTest {
 
-    @Rule
+    @Container
     // dependsOn {
     public GenericContainer<?> redis = new GenericContainer<>("redis:6-alpine").withExposedPorts(6379);
 
-    @Rule
+    @Container
     public GenericContainer<?> nginx = new GenericContainer<>("nginx:1.27.0-alpine3.19-slim")
         .dependsOn(redis)
         .withExposedPorts(80);