Add test coverage for POM format when extensions are added/removed'

fix style

http/rest-client/src/test/java/io/quarkus/ts/http/restclient/GzipMaxInputIT.java

@@ -100,7 +100,7 @@ void testGzipOverTheMaxLimit() throws IOException {
         assertEquals(HttpStatus.SC_REQUEST_TOO_LONG, response.statusCode());
     }
 
-    @Disabled ("Because https://github.com/quarkusio/quarkus/issues/40806")
+    @Disabled("Because https://github.com/quarkusio/quarkus/issues/40806")
     @Test
     void testGzipBelowMaxLimit() throws IOException {
         byte[] compressedData = generateCompressedData(gzip_bellow_1K_limit_max);

quarkus-cli/src/test/java/io/quarkus/ts/quarkus/cli/QuarkusCliPomIntegrityIT.java

@@ -0,0 +1,53 @@
+package io.quarkus.ts.quarkus.cli;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.List;
+
+import jakarta.inject.Inject;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import io.quarkus.test.bootstrap.QuarkusCliClient;
+import io.quarkus.test.bootstrap.QuarkusCliRestService;
+import io.quarkus.test.scenarios.QuarkusScenario;
+
+@QuarkusScenario
+public class QuarkusCliPomIntegrityIT {
+    /*
+     * This scenario is related to the backport https://github.com/quarkusio/quarkus/issues/39088
+     *
+     */
+    private static final String NEW_EXTENSION = "quarkus-kafka-client";
+    private static final String COMMENT = "<!-- Disable native build on this module -->";
+
+    private static final String APP_NAME = "my-quarkus-app";
+
+    @Inject
+    static QuarkusCliClient cliClient;
+
+    @Disabled
+    @Test
+    public void shouldKeepCommentInPomAfterAddAndRemoveExtension() throws IOException {
+        final Path POM_PATH = Paths.get("target", QuarkusCliPomIntegrityIT.class.getSimpleName(), APP_NAME, "pom.xml");
+        QuarkusCliRestService app = cliClient.createApplication("my-quarkus-app",
+                QuarkusCliClient.CreateApplicationRequest.defaults());
+
+        List<String> initialPomContent = Files.readAllLines(POM_PATH);
+        initialPomContent.add(1, COMMENT);
+
+        // Add extension
+        app.installExtension(NEW_EXTENSION);
+        List<String> updatedPomContent = Files.readAllLines(POM_PATH);
+        Assertions.assertTrue(updatedPomContent.contains(COMMENT), "The comment after add extension still should be there");
+
+        // Remove extension
+        app.removeExtension(NEW_EXTENSION);
+        List<String> finalPomContent = Files.readAllLines(POM_PATH);
+        Assertions.assertTrue(finalPomContent.contains(COMMENT), "The comment after remove extension still should be there");
+    }
+}