8044537: Implement classfile tests for Synthetic attribute

Reviewed-by: jjg, shurailine, anazarov

langtools/test/tools/javac/classfiles/attributes/Synthetic/BridgeMethodsForLambdaTest.java

@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8044537
+ * @summary Checking ACC_SYNTHETIC flag is generated for bridge method
+ *          generated for lambda expressions and method references.
+ * @library /tools/lib /tools/javac/lib ../lib
+ * @build TestBase TestResult InMemoryFileManager ToolBox
+ * @build BridgeMethodsForLambdaTest SyntheticTestDriver ExpectedClass ExpectedClasses
+ * @run main SyntheticTestDriver BridgeMethodsForLambdaTest 1
+ */
+
+import java.util.Comparator;
+import java.util.stream.IntStream;
+
+/**
+ * Synthetic members:
+ * 1. inner class for Inner1.
+ * 2. method for () -> {} in Inner1
+ * 3. method for () -> {} in Inner2
+ * 4. method references to private methods.
+ * 5. method for super::function()
+ * 6. method references to private static methods.
+ * 7. access method for private method function().
+ * 8. access method for private static method staticFunction().
+ * 9. method reference to vararg method.
+ * 10. method reference to array's method.
+ * 11. constructors for Inner1 and Inner2.
+ */
+@ExpectedClass(className = "BridgeMethodsForLambdaTest",
+        expectedMethods = {"<init>()", "<clinit>()", "function(java.lang.Integer[])"},
+        expectedNumberOfSyntheticMethods = 6)
+@ExpectedClass(className = "BridgeMethodsForLambdaTest$Inner1",
+        expectedMethods = {"<init>(BridgeMethodsForLambdaTest)", "function()", "run()"},
+        expectedFields = "lambda1",
+        expectedNumberOfSyntheticMethods = 4,
+        expectedNumberOfSyntheticFields = 1)
+@ExpectedClass(className = "BridgeMethodsForLambdaTest$Inner2",
+        expectedMethods = {"<init>()", "staticFunction()"},
+        expectedFields = "lambda1",
+        expectedNumberOfSyntheticMethods = 3)
+@ExpectedClass(className = "BridgeMethodsForLambdaTest$Inner3",
+        expectedMethods = {"<init>(BridgeMethodsForLambdaTest)", "function()"},
+        expectedNumberOfSyntheticMethods = 1,
+        expectedNumberOfSyntheticFields = 1)
+@ExpectedClass(className = "BridgeMethodsForLambdaTest$Inner4",
+        expectedMethods = {"<init>(BridgeMethodsForLambdaTest)", "function()"},
+        expectedNumberOfSyntheticMethods = 1,
+        expectedNumberOfSyntheticFields = 1)
+public class BridgeMethodsForLambdaTest {
+
+    private class Inner1 implements Runnable {
+        private Inner1() {
+        }
+        private Runnable lambda1 = () -> {
+        };
+        private void function() {
+        }
+        @Override
+        public void run() {
+        }
+    }
+
+    private static class Inner2 {
+        private Runnable lambda1 = () -> {
+        };
+        private static void staticFunction() {
+        }
+    }
+
+    private class Inner3 {
+        public void function() {
+        }
+    }
+
+    private class Inner4 extends Inner3 {
+        @Override
+        public void function() {
+            Runnable r = super::function;
+        }
+    }
+
+    private static int function(Integer...vararg) {
+        return 0;
+    }
+
+    {
+        Inner1 inner = new Inner1();
+        Runnable l1 = inner::function;
+        Runnable l2 = Inner1::new;
+        inner.lambda1 = inner::function;
+        Comparator<Integer> c = BridgeMethodsForLambdaTest::function;
+        IntStream.of(2).mapToObj(int[]::new);
+    }
+
+    static {
+        Inner2 inner = new Inner2();
+        Runnable l1 = Inner2::staticFunction;
+    }
+}