Handle flaky UI tests by waiting for the JDT index

.mvn/maven.config

@@ -1,3 +1,3 @@
 --show-version
 --update-snapshots
--Dsurefire.rerunFailingTestsCount=5
+#-Dsurefire.rerunFailingTestsCount=5

org.eclipse.xtend.ide.tests/src/org/eclipse/xtend/ide/tests/compiler/QuickDebugSourceInstallingCompilationParticipantTest.java

@@ -0,0 +1,91 @@
+/**
+ * Copyright (c) 2023, 2025 itemis AG (http://www.itemis.eu) and others.
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ * 
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.eclipse.xtend.ide.tests.compiler;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.eclipse.core.resources.IFile;
+import org.eclipse.xtend.ide.tests.AbstractXtendUITestCase;
+import org.eclipse.xtend.ide.tests.WorkbenchTestHelper;
+import org.eclipse.xtext.ui.testing.util.IResourcesSetupUtil;
+import org.junit.Test;
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.Opcodes;
+
+import com.google.common.io.ByteStreams;
+import com.google.inject.Inject;
+
+/**
+ * @author Christian Dietrich - Initial contribution and API
+ */
+public class QuickDebugSourceInstallingCompilationParticipantTest extends AbstractXtendUITestCase {
+	@Inject
+	private WorkbenchTestHelper workbenchTestHelper;
+
+	@Test
+	public void testIfThereIsAnyStatum() throws Exception {
+		// ensure JDT is fully functional and its participants registered
+		workbenchTestHelper.createFile("hello/Hello.java", """
+			package hello;
+
+			public class Hello {
+			}
+		""");
+		IResourcesSetupUtil.waitForBuild();
+
+		final IFile source = workbenchTestHelper.createFile("somePackage/Outer.xtend", """
+			package somePackage
+
+			class Outer {
+			  def dosomething() {
+			  	println(1)
+			  	println(2)
+			  	println(3)
+			  }
+			}
+		""");
+		IResourcesSetupUtil.waitForBuild();
+		final IFile clazz = source.getProject().getFile("bin/somePackage/Outer.class");
+		assertTrue("bytecode not found", clazz.exists());
+		final AtomicBoolean debugInfoFound = new AtomicBoolean(false);
+		try (var in = clazz.getContents()) {
+			final byte[] bytes = ByteStreams.toByteArray(in);
+			final ClassReader r = new ClassReader(bytes);
+			r.accept(new ClassVisitor(Opcodes.ASM9) {
+				@Override
+				public void visitSource(final String source, final String debug) {
+					if ("Outer.java".equals(source)) {
+						assertEquals("""
+							SMAP
+							Outer.java
+							Xtend
+							*S Xtend
+							*F
+							+ 0 Outer.xtend
+							somePackage/Outer.xtend
+							*L
+							4:8,2
+							5:10
+							6:11
+							7:12
+							4:13,2
+							*E
+							""", debug.replace("\r", ""));
+						debugInfoFound.set(true);
+					}
+					super.visitSource(source, debug);
+				}
+			}, 0);
+			if (!debugInfoFound.get()) {
+				fail("No source attribute found in bytecode");
+			}
+		}
+	}
+}

org.eclipse.xtext.builder.tests/src/org/eclipse/xtext/builder/impl/DisabledBuilderTest.java

@@ -13,7 +13,6 @@
 import java.util.Collections;
 
 import org.eclipse.core.resources.IProject;
-import org.eclipse.core.resources.IncrementalProjectBuilder;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.NullProgressMonitor;
 import org.eclipse.emf.common.util.URI;
@@ -42,12 +41,12 @@ public void testDisabledProject() throws CoreException {
 		URI uri = URI.createURI("platform:/resource/org.eclipse.emf.ecore/model/Ecore.ecore");
 		assertNull(descriptions.getResourceDescription(uri));
 
-		IProject foo = createPluginProject("foo", false, null);
-		foo.getWorkspace().build(IncrementalProjectBuilder.FULL_BUILD, new NullProgressMonitor());
+		createPluginProject("foo", false, null);
+		fullBuild();
 		assertNull(descriptions.getResourceDescription(uri));
 
 		createPluginProject("bar", true, "foo");
-		foo.getWorkspace().build(IncrementalProjectBuilder.FULL_BUILD, new NullProgressMonitor());
+		fullBuild();
 		assertNotNull(descriptions.getResourceDescription(uri));
 	}