Headless feature

README.md

@@ -105,6 +105,17 @@ To run the integration tests, execute the following command:
 mvn -Pit verify
 ```
 
+To debug the UI with a visible browser, disable headless mode using either the
+`headless` property or the `debug-ui` profile:
+
+```bash
+# system property
+mvn -Dit.test=ContextMenuViewIT -Dheadless=false verify
+
+# convenient profile
+mvn -Pdebug-ui -Dit.test=ContextMenuViewIT verify
+```
+
 ## How to use it
 
 Add the addon as a test dependency.

pom.xml

@@ -147,10 +147,16 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
                 <version>3.2.5</version>
+                <configuration>
+                    <systemPropertyVariables>
+                        <headless>${headless}</headless>
+                    </systemPropertyVariables>
+                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-failsafe-plugin</artifactId>
+                <version>3.5.4</version>
                 <executions>
                     <execution>
                         <goals>
@@ -165,6 +171,9 @@
                     </includes>
                     <trimStackTrace>false</trimStackTrace>
                     <enableAssertions>true</enableAssertions>
+                    <systemPropertyVariables>
+                        <headless>${headless}</headless>
+                    </systemPropertyVariables>
                 </configuration>
             </plugin>
             <plugin>
@@ -190,6 +199,12 @@
     </build>
 
     <profiles>
+        <profile>
+            <id>debug-ui</id>
+            <properties>
+                <headless>false</headless>
+            </properties>
+        </profile>
         <profile>
             <id>release</id>
             <build>
@@ -251,4 +266,4 @@
             </build>
         </profile>
     </profiles>
-</project>
+</project>

src/main/java/org/vaadin/addons/dramafinder/AbstractBasePlaywrightIT.java

@@ -105,6 +105,13 @@ protected void select(Locator locator, String val) {
     }
 
     protected static boolean isHeadless() {
-        return true;
+        String propertyValue = System.getProperty("headless");
+        if (propertyValue == null || propertyValue.isBlank()) {
+            propertyValue = System.getenv("HEADLESS");
+        }
+        if (propertyValue == null || propertyValue.isBlank()) {
+            return true;
+        }
+        return Boolean.parseBoolean(propertyValue);
     }
-}
+}