Propagate Quarkus related failsafe system properties

Closes: quarkusio#31405

integration-tests/test-extension/tests/pom.xml

@@ -109,6 +109,7 @@
           <systemPropertyVariables>
             <!-- See io.quarkus.extest.runtime.classpath.RecordedClasspathEntries -->
             <classpathEntriesRecordingFile>${project.build.directory}/recorded-classpath-entries-failsafe.txt</classpathEntriesRecordingFile>
+            <quarkus.dymmy>test</quarkus.dymmy>
           </systemPropertyVariables>
         </configuration>
       </plugin>

integration-tests/test-extension/tests/src/main/java/io/quarkus/it/extension/SystemPropertyTestEndpoint.java

@@ -0,0 +1,18 @@
+package io.quarkus.it.extension;
+
+import java.io.IOException;
+
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+@WebServlet(name = "SystemPropertyTestEndpoint", urlPatterns = "/core/sysprop")
+public class SystemPropertyTestEndpoint extends HttpServlet {
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        resp.getWriter().write(System.getProperty("quarkus.dymmy", "unset"));
+    }
+
+}

integration-tests/test-extension/tests/src/test/java/io/quarkus/it/extension/SystemPropertyGraalITCase.java

@@ -0,0 +1,18 @@
+package io.quarkus.it.extension;
+
+import static io.restassured.RestAssured.when;
+import static org.hamcrest.Matchers.is;
+
+import org.junit.jupiter.api.Test;
+
+import io.quarkus.test.junit.QuarkusIntegrationTest;
+
+@QuarkusIntegrationTest
+public class SystemPropertyGraalITCase {
+
+    @Test
+    public void test() {
+        when().get("/core/sysprop").then()
+                .body(is("test"));
+    }
+}

test-framework/junit5/src/main/java/io/quarkus/test/junit/QuarkusIntegrationTestExtension.java

@@ -213,7 +213,17 @@ private QuarkusTestExtensionState doProcessStart(Properties quarkusArtifactPrope
                 populateCallbacks(requiredTestClass.getClassLoader());
             }
 
-            Map<String, String> additionalProperties = new HashMap<>(testProfileAndProperties.properties);
+            Map<String, String> additionalProperties = new HashMap<>();
+
+            // propagate Quarkus properties set from the build tool
+            Properties existingSysProps = System.getProperties();
+            for (String name : existingSysProps.stringPropertyNames()) {
+                if (name.startsWith("quarkus.")) {
+                    additionalProperties.put(name, existingSysProps.getProperty(name));
+                }
+            }
+
+            additionalProperties.putAll(testProfileAndProperties.properties);
             Map<String, String> resourceManagerProps = new HashMap<>(testResourceManager.start());
             //we also make the dev services config accessible from the test itself
             resourceManagerProps.putAll(QuarkusIntegrationTestExtension.devServicesProps);

test-framework/junit5/src/main/java/io/quarkus/test/junit/QuarkusMainIntegrationTestExtension.java

@@ -126,7 +126,18 @@ private ArtifactLauncher.LaunchResult doProcessStart(ExtensionContext context, S
                 testResourceManager.init(
                         testProfileAndProperties.testProfile != null ? testProfileAndProperties.testProfile.getClass().getName()
                                 : null);
-                Map<String, String> additionalProperties = new HashMap<>(testProfileAndProperties.properties);
+
+                Map<String, String> additionalProperties = new HashMap<>();
+
+                // propagate Quarkus properties set from the build tool
+                Properties existingSysProps = System.getProperties();
+                for (String name : existingSysProps.stringPropertyNames()) {
+                    if (name.startsWith("quarkus.")) {
+                        additionalProperties.put(name, existingSysProps.getProperty(name));
+                    }
+                }
+
+                additionalProperties.putAll(testProfileAndProperties.properties);
                 Map<String, String> resourceManagerProps = new HashMap<>(testResourceManager.start());
                 //also make the dev services props accessible from the test
                 resourceManagerProps.putAll(QuarkusMainIntegrationTestExtension.devServicesProps);