Added an EDT error handler to see if there's a chance

Author: shai-almog

scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/tests/AbstractGraphicsScreenshotTest.java

@@ -10,7 +10,7 @@ abstract class AbstractGraphicsScreenshotTest extends BaseTest {
     protected abstract String screenshotName();
 
     @Override
-    public boolean runTest() throws Exception {
+    public boolean runTest() {
         Form form = createForm("Graphics", new BorderLayout(), screenshotName());
         form.add(BorderLayout.CENTER, createContent());
         form.show();

scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/tests/Cn1ssDeviceRunner.java

@@ -1,5 +1,6 @@
 package com.codenameone.examples.hellocodenameone.tests;
 
+import com.codename1.io.Log;
 import com.codename1.io.Util;
 import com.codename1.testing.DeviceRunner;
 import com.codename1.testing.TestReporting;
@@ -20,6 +21,12 @@ public final class Cn1ssDeviceRunner extends DeviceRunner {
     };
 
     public void runSuite() {
+        CN.callSerially(() -> {
+            Display.getInstance().addEdtErrorHandler(e -> {
+                log("CN1SS:ERR:exception caught in EDT " + e.getSource());
+                Log.e((Throwable)e.getSource());
+            });
+        });
         for (BaseTest testClass : TEST_CLASSES) {
             CN.callSerially(() -> {
                 log("CN1SS:INFO:suite starting test=" + testClass);