Java21RecordCompilerTest in xbase.tests

org.eclipse.xtext.xbase.tests/META-INF/MANIFEST.MF

@@ -16,7 +16,8 @@ Require-Bundle: org.eclipse.xtext.xbase;bundle-version="2.35.0",
  org.eclipse.core.runtime;bundle-version="3.24.100",
  org.eclipse.xtext.xbase.testdata;bundle-version="2.35.0",
  org.eclipse.xtext.xbase.ide;bundle-version="2.35.0",
- org.junit;bundle-version="4.13.2"
+ org.junit;bundle-version="4.13.2",
+ org.eclipse.draw2d;bundle-version="3.16.0"
 Bundle-Vendor: Eclipse Xtext
 Export-Package: org.eclipse.xtext.xbase.tests;version="2.35.0",
  org.eclipse.xtext.xbase.tests.interpreter;version="2.35.0"

org.eclipse.xtext.xbase.tests/src/org/eclipse/xtext/xbase/tests/compiler/Java21RecordCompilerTest.java

@@ -0,0 +1,78 @@
+/*******************************************************************************
+ * Copyright (c) 2024 Lorenzo Bettini 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.xtext.xbase.tests.compiler;
+
+import java.util.stream.Collectors;
+
+import org.eclipse.xtext.diagnostics.Severity;
+import org.eclipse.xtext.util.JavaRuntimeVersion;
+import org.eclipse.xtext.util.Strings;
+import org.eclipse.xtext.xbase.testing.CompilationTestHelper;
+import org.eclipse.xtext.xbase.testing.TemporaryFolder;
+import org.eclipse.xtext.xbase.tests.jvmmodel.AbstractJvmModelTest;
+import org.junit.Assume;
+import org.junit.Rule;
+import org.junit.Test;
+
+import com.google.inject.Inject;
+
+/**
+ * @author Lorenzo Bettini - Initial contribution and API
+ */
+public class Java21RecordCompilerTest extends AbstractJvmModelTest {
+	@Rule
+	@Inject
+	public TemporaryFolder temporaryFolder;
+
+	@Inject
+	private CompilationTestHelper compilationTestHelper;
+
+	/**
+	 * Since there's no record in the JDK and adding a Java source with a record in this
+	 * project would require Java 21 compilation level, I'm using a known record from
+	 * draw2d, which is in our target platform.
+	 */
+	@Test public void testUseJavaRecord() throws Exception {
+		Assume.assumeTrue("Active only on Java 21 and later", JavaRuntimeVersion.isJava21OrLater());
+		String source =
+				"{\n"
+				+ "  var interval = new org.eclipse.draw2d.geometry.Interval(0, 10);\n"
+				+ "  var int begin = interval.begin\n"
+				+ "  var end = interval.end()\n"
+				+ "  interval.toString"
+				+ "}";
+		compilationTestHelper.compile(source, it -> {
+			String expectation =
+					"import org.eclipse.draw2d.geometry.Interval;\n"
+					+ "\n"
+					+ "@SuppressWarnings(\"all\")\n"
+					+ "public class Test {\n"
+					+ "  public String doStuff(final String s) {\n"
+					+ "    String _xblockexpression = null;\n"
+					+ "    {\n"
+					+ "      Interval interval = new Interval(0, 10);\n"
+					+ "      int begin = interval.begin();\n"
+					+ "      int end = interval.end();\n"
+					+ "      _xblockexpression = interval.toString();\n"
+					+ "    }\n"
+					+ "    return _xblockexpression;\n"
+					+ "  }\n"
+					+ "}\n"
+					+ "";
+			var errors = it.getErrorsAndWarnings().stream()
+					.filter(issue -> issue.getSeverity() == Severity.ERROR)
+					.collect(Collectors.toList());
+			if (!errors.isEmpty()) {
+				throw new IllegalStateException("One or more resources contained issues: " + errors);
+			}
+			assertEquals(expectation, Strings.toUnixLineSeparator(it.getSingleGeneratedCode()));
+			it.getCompiledClass();
+		});
+	}
+}