docs: add JUnit-style example test to k6 module docs

Author: PreAgile

docs/modules/k6.md

@@ -11,12 +11,17 @@ Testcontainers module for [k6](https://registry.hub.docker.com/r/grafana/k6).
 
 ## Basic script execution
 
-Execute a simple k6 test script, `test.js`, with commandline options and injected script variable.
+The following example shows a typical JUnit 5 test that runs a k6 script inside a container, waits for the run to finish, and asserts on the output.
+
+<!--codeinclude-->
+[Running a k6 script in a JUnit test](../../modules/k6/src/test/java/org/testcontainers/k6/K6ContainerTests.java) inside_block:standard_k6_test
+<!--/codeinclude-->
+
+The test above uses a simple k6 script, `test.js`, with command line options and an injected script variable.
 
 Create a simple k6 test script to be executed as part of your tests:
 
 <!--codeinclude-->
-[Setup the container](../../modules/k6/src/test/java/org/testcontainers/k6/K6ContainerTests.java) inside_block:standard_k6
 [Content of `scripts/test.js`](../../modules/k6/src/test/resources/scripts/test.js) inside_block:access_script_vars
 <!--/codeinclude-->
 

modules/k6/src/test/java/org/testcontainers/k6/K6ContainerTests.java

@@ -12,6 +12,7 @@ class K6ContainerTests {
 
     @Test
     void k6StandardTest() throws Exception {
+        // standard_k6_test {
         try (
             // standard_k6 {
             K6Container container = new K6Container("grafana/k6:0.49.0")
@@ -37,5 +38,6 @@ void k6StandardTest() throws Exception {
 
             assertThat(container.getLogs()).contains("k6 tests are cool!");
         }
+        // }
     }
 }