/* * Copyright (c) 2009, 2011, 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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 * @summary example code used in javadoc for java.lang.invoke API * @compile JavaDocExamplesTest.java * @run junit/othervm test.java.lang.invoke.JavaDocExamplesTest */ /* ---- To run outside jtreg: $ $JAVA7X_HOME/bin/javac -cp $JUNIT4_JAR -d /tmp/Classes \ $DAVINCI/sources/jdk/test/java/lang/invoke/JavaDocExamplesTest.java $ $JAVA7X_HOME/bin/java -cp $JUNIT4_JAR:/tmp/Classes \ -DJavaDocExamplesTest.verbosity=1 \ test.java.lang.invoke.JavaDocExamplesTest ---- */ package test.java.lang.invoke; import java.lang.invoke.*; import static java.lang.invoke.MethodHandles.*; import static java.lang.invoke.MethodType.*; import java.util.*; import org.junit.*; import static org.junit.Assert.*; /** * @author jrose */ public class JavaDocExamplesTest { /** Wrapper for running the JUnit tests in this module. * Put JUnit on the classpath! */ public static void main(String... ignore) throws Throwable { System.out.println("can run this as:"); System.out.println("$ java org.junit.runner.JUnitCore "+JavaDocExamplesTest.class.getName()); new JavaDocExamplesTest().run(); } public void run() throws Throwable { testFindVirtual(); testPermuteArguments(); testDropArguments(); testFilterArguments(); testFoldArguments(); testFoldArguments2(); testMethodHandlesSummary(); testAsSpreader(); testAsCollector(); testAsVarargsCollector(); testAsFixedArity(); testAsTypeCornerCases(); testMutableCallSite(); } // How much output? static final Class THIS_CLASS = JavaDocExamplesTest.class; static int verbosity = Integer.getInteger(THIS_CLASS.getSimpleName()+".verbosity", 0); {} static final private Lookup LOOKUP = lookup(); // static final private MethodHandle CONCAT_1 = LOOKUP.findVirtual(String.class, // "concat", methodType(String.class, String.class)); // static final private MethodHandle HASHCODE_1 = LOOKUP.findVirtual(Object.class, // "hashCode", methodType(int.class)); // form required if ReflectiveOperationException is intercepted: static final private MethodHandle CONCAT_2, HASHCODE_2, ADD_2, SUB_2; static { try { Class THIS_CLASS = LOOKUP.lookupClass(); CONCAT_2 = LOOKUP.findVirtual(String.class, "concat", methodType(String.class, String.class)); HASHCODE_2 = LOOKUP.findVirtual(Object.class, "hashCode", methodType(int.class)); ADD_2 = LOOKUP.findStatic(THIS_CLASS, "add", methodType(int.class, int.class, int.class)); SUB_2 = LOOKUP.findStatic(THIS_CLASS, "sub", methodType(int.class, int.class, int.class)); } catch (ReflectiveOperationException ex) { throw new RuntimeException(ex); } } static int add(int x, int y) { return x + y; } static int sub(int x, int y) { return x - y; } {} @Test public void testFindVirtual() throws Throwable { {} MethodHandle CONCAT_3 = LOOKUP.findVirtual(String.class, "concat", methodType(String.class, String.class)); MethodHandle HASHCODE_3 = LOOKUP.findVirtual(Object.class, "hashCode", methodType(int.class)); //assertEquals("xy", (String) CONCAT_1.invokeExact("x", "y")); assertEquals("xy", (String) CONCAT_2.invokeExact("x", "y")); assertEquals("xy", (String) CONCAT_3.invokeExact("x", "y")); //assertEquals("xy".hashCode(), (int) HASHCODE_1.invokeExact((Object)"xy")); assertEquals("xy".hashCode(), (int) HASHCODE_2.invokeExact((Object)"xy")); assertEquals("xy".hashCode(), (int) HASHCODE_3.invokeExact((Object)"xy")); {} } @Test public void testPermuteArguments() throws Throwable { {{ {} /// JAVADOC MethodType intfn1 = methodType(int.class, int.class); MethodType intfn2 = methodType(int.class, int.class, int.class); MethodHandle sub = SUB_2;// ... {int x, int y => x-y} ...; assert(sub.type().equals(intfn2)); MethodHandle sub1 = permuteArguments(sub, intfn2, 0, 1); MethodHandle rsub = permuteArguments(sub, intfn2, 1, 0); assert((int)rsub.invokeExact(1, 100) == 99); MethodHandle add = ADD_2;// ... {int x, int y => x+y} ...; assert(add.type().equals(intfn2)); MethodHandle twice = permuteArguments(add, intfn1, 0, 0); assert(twice.type().equals(intfn1)); assert((int)twice.invokeExact(21) == 42); }} {{ {} /// JAVADOC MethodHandle cat = lookup().findVirtual(String.class, "concat", methodType(String.class, String.class)); assertEquals("xy", (String) cat.invokeExact("x", "y")); MethodHandle d0 = dropArguments(cat, 0, String.class); assertEquals("yz", (String) d0.invokeExact("x", "y", "z")); MethodHandle d1 = dropArguments(cat, 1, String.class); assertEquals("xz", (String) d1.invokeExact("x", "y", "z")); MethodHandle d2 = dropArguments(cat, 2, String.class); assertEquals("xy", (String) d2.invokeExact("x", "y", "z")); MethodHandle d12 = dropArguments(cat, 1, int.class, boolean.class); assertEquals("xz", (String) d12.invokeExact("x", 12, true, "z")); }} } @Test public void testDropArguments() throws Throwable { {{ {} /// JAVADOC MethodHandle cat = lookup().findVirtual(String.class, "concat", methodType(String.class, String.class)); assertEquals("xy", (String) cat.invokeExact("x", "y")); MethodType bigType = cat.type().insertParameterTypes(0, int.class, String.class); MethodHandle d0 = dropArguments(cat, 0, bigType.parameterList().subList(0,2)); assertEquals(bigType, d0.type()); assertEquals("yz", (String) d0.invokeExact(123, "x", "y", "z")); }} {{ {} /// JAVADOC MethodHandle cat = lookup().findVirtual(String.class, "concat", methodType(String.class, String.class)); assertEquals("xy", (String) cat.invokeExact("x", "y")); MethodHandle d0 = dropArguments(cat, 0, String.class); assertEquals("yz", (String) d0.invokeExact("x", "y", "z")); MethodHandle d1 = dropArguments(cat, 1, String.class); assertEquals("xz", (String) d1.invokeExact("x", "y", "z")); MethodHandle d2 = dropArguments(cat, 2, String.class); assertEquals("xy", (String) d2.invokeExact("x", "y", "z")); MethodHandle d12 = dropArguments(cat, 1, int.class, boolean.class); assertEquals("xz", (String) d12.invokeExact("x", 12, true, "z")); }} } @Test public void testFilterArguments() throws Throwable { {{ {} /// JAVADOC MethodHandle cat = lookup().findVirtual(String.class, "concat", methodType(String.class, String.class)); MethodHandle upcase = lookup().findVirtual(String.class, "toUpperCase", methodType(String.class)); assertEquals("xy", (String) cat.invokeExact("x", "y")); MethodHandle f0 = filterArguments(cat, 0, upcase); assertEquals("Xy", (String) f0.invokeExact("x", "y")); // Xy MethodHandle f1 = filterArguments(cat, 1, upcase); assertEquals("xY", (String) f1.invokeExact("x", "y")); // xY MethodHandle f2 = filterArguments(cat, 0, upcase, upcase); assertEquals("XY", (String) f2.invokeExact("x", "y")); // XY }} } @Test public void testFoldArguments() throws Throwable { {{ {} /// JAVADOC MethodHandle trace = publicLookup().findVirtual(java.io.PrintStream.class, "println", methodType(void.class, String.class)) .bindTo(System.out); MethodHandle cat = lookup().findVirtual(String.class, "concat", methodType(String.class, String.class)); assertEquals("boojum", (String) cat.invokeExact("boo", "jum")); MethodHandle catTrace = foldArguments(cat, trace); // also prints "boo": assertEquals("boojum", (String) catTrace.invokeExact("boo", "jum")); }} } static void assertEquals(Object exp, Object act) { if (verbosity > 0) System.out.println("result: "+act); Assert.assertEquals(exp, act); } @Test public void testMethodHandlesSummary() throws Throwable { {{ {} /// JAVADOC Object x, y; String s; int i; MethodType mt; MethodHandle mh; MethodHandles.Lookup lookup = MethodHandles.lookup(); // mt is (char,char)String mt = MethodType.methodType(String.class, char.class, char.class); mh = lookup.findVirtual(String.class, "replace", mt); s = (String) mh.invokeExact("daddy",'d','n'); // invokeExact(Ljava/lang/String;CC)Ljava/lang/String; assertEquals(s, "nanny"); // weakly typed invocation (using MHs.invoke) s = (String) mh.invokeWithArguments("sappy", 'p', 'v'); assertEquals(s, "savvy"); // mt is (Object[])List mt = MethodType.methodType(java.util.List.class, Object[].class); mh = lookup.findStatic(java.util.Arrays.class, "asList", mt); assert(mh.isVarargsCollector()); x = mh.invoke("one", "two"); // invoke(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/Object; assertEquals(x, java.util.Arrays.asList("one","two")); // mt is (Object,Object,Object)Object mt = MethodType.genericMethodType(3); mh = mh.asType(mt); x = mh.invokeExact((Object)1, (Object)2, (Object)3); // invokeExact(Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object; assertEquals(x, java.util.Arrays.asList(1,2,3)); // mt is ()int mt = MethodType.methodType(int.class); mh = lookup.findVirtual(java.util.List.class, "size", mt); i = (int) mh.invokeExact(java.util.Arrays.asList(1,2,3)); // invokeExact(Ljava/util/List;)I assert(i == 3); mt = MethodType.methodType(void.class, String.class); mh = lookup.findVirtual(java.io.PrintStream.class, "println", mt); mh.invokeExact(System.out, "Hello, world."); // invokeExact(Ljava/io/PrintStream;Ljava/lang/String;)V {} }} } @Test public void testAsSpreader() throws Throwable { {{ {} /// JAVADOC MethodHandle equals = publicLookup() .findVirtual(String.class, "equals", methodType(boolean.class, Object.class)); assert( (boolean) equals.invokeExact("me", (Object)"me")); assert(!(boolean) equals.invokeExact("me", (Object)"thee")); // spread both arguments from a 2-array: MethodHandle eq2 = equals.asSpreader(Object[].class, 2); assert( (boolean) eq2.invokeExact(new Object[]{ "me", "me" })); assert(!(boolean) eq2.invokeExact(new Object[]{ "me", "thee" })); // spread both arguments from a String array: MethodHandle eq2s = equals.asSpreader(String[].class, 2); assert( (boolean) eq2s.invokeExact(new String[]{ "me", "me" })); assert(!(boolean) eq2s.invokeExact(new String[]{ "me", "thee" })); // spread second arguments from a 1-array: MethodHandle eq1 = equals.asSpreader(Object[].class, 1); assert( (boolean) eq1.invokeExact("me", new Object[]{ "me" })); assert(!(boolean) eq1.invokeExact("me", new Object[]{ "thee" })); // spread no arguments from a 0-array or null: MethodHandle eq0 = equals.asSpreader(Object[].class, 0); assert( (boolean) eq0.invokeExact("me", (Object)"me", new Object[0])); assert(!(boolean) eq0.invokeExact("me", (Object)"thee", (Object[])null)); // asSpreader and asCollector are approximate inverses: for (int n = 0; n <= 2; n++) { for (Class a : new Class[]{Object[].class, String[].class, CharSequence[].class}) { MethodHandle equals2 = equals.asSpreader(a, n).asCollector(a, n); assert( (boolean) equals2.invokeWithArguments("me", "me")); assert(!(boolean) equals2.invokeWithArguments("me", "thee")); } } MethodHandle caToString = publicLookup() .findStatic(Arrays.class, "toString", methodType(String.class, char[].class)); assertEquals("[A, B, C]", (String) caToString.invokeExact("ABC".toCharArray())); MethodHandle caString3 = caToString.asCollector(char[].class, 3); assertEquals("[A, B, C]", (String) caString3.invokeExact('A', 'B', 'C')); MethodHandle caToString2 = caString3.asSpreader(char[].class, 2); assertEquals("[A, B, C]", (String) caToString2.invokeExact('A', "BC".toCharArray())); }} } @Test public void testAsCollector() throws Throwable { {{ {} /// JAVADOC MethodHandle deepToString = publicLookup() .findStatic(Arrays.class, "deepToString", methodType(String.class, Object[].class)); assertEquals("[won]", (String) deepToString.invokeExact(new Object[]{"won"})); MethodHandle ts1 = deepToString.asCollector(Object[].class, 1); assertEquals(methodType(String.class, Object.class), ts1.type()); //assertEquals("[won]", (String) ts1.invokeExact( new Object[]{"won"})); //FAIL assertEquals("[[won]]", (String) ts1.invokeExact((Object) new Object[]{"won"})); // arrayType can be a subtype of Object[] MethodHandle ts2 = deepToString.asCollector(String[].class, 2); assertEquals(methodType(String.class, String.class, String.class), ts2.type()); assertEquals("[two, too]", (String) ts2.invokeExact("two", "too")); MethodHandle ts0 = deepToString.asCollector(Object[].class, 0); assertEquals("[]", (String) ts0.invokeExact()); // collectors can be nested, Lisp-style MethodHandle ts22 = deepToString.asCollector(Object[].class, 3).asCollector(String[].class, 2); assertEquals("[A, B, [C, D]]", ((String) ts22.invokeExact((Object)'A', (Object)"B", "C", "D"))); // arrayType can be any primitive array type MethodHandle bytesToString = publicLookup() .findStatic(Arrays.class, "toString", methodType(String.class, byte[].class)) .asCollector(byte[].class, 3); assertEquals("[1, 2, 3]", (String) bytesToString.invokeExact((byte)1, (byte)2, (byte)3)); MethodHandle longsToString = publicLookup() .findStatic(Arrays.class, "toString", methodType(String.class, long[].class)) .asCollector(long[].class, 1); assertEquals("[123]", (String) longsToString.invokeExact((long)123)); }} } @SuppressWarnings("rawtypes") @Test public void testAsVarargsCollector() throws Throwable { {{ {} /// JAVADOC MethodHandle deepToString = publicLookup() .findStatic(Arrays.class, "deepToString", methodType(String.class, Object[].class)); MethodHandle ts1 = deepToString.asVarargsCollector(Object[].class); assertEquals("[won]", (String) ts1.invokeExact( new Object[]{"won"})); assertEquals("[won]", (String) ts1.invoke( new Object[]{"won"})); assertEquals("[won]", (String) ts1.invoke( "won" )); assertEquals("[[won]]", (String) ts1.invoke((Object) new Object[]{"won"})); // findStatic of Arrays.asList(...) produces a variable arity method handle: MethodHandle asList = publicLookup() .findStatic(Arrays.class, "asList", methodType(List.class, Object[].class)); assertEquals(methodType(List.class, Object[].class), asList.type()); assert(asList.isVarargsCollector()); assertEquals("[]", asList.invoke().toString()); assertEquals("[1]", asList.invoke(1).toString()); assertEquals("[two, too]", asList.invoke("two", "too").toString()); String[] argv = { "three", "thee", "tee" }; assertEquals("[three, thee, tee]", asList.invoke(argv).toString()); assertEquals("[three, thee, tee]", asList.invoke((Object[])argv).toString()); List ls = (List) asList.invoke((Object)argv); assertEquals(1, ls.size()); assertEquals("[three, thee, tee]", Arrays.toString((Object[])ls.get(0))); }} } @Test public void testAsFixedArity() throws Throwable { {{ {} /// JAVADOC MethodHandle asListVar = publicLookup() .findStatic(Arrays.class, "asList", methodType(List.class, Object[].class)) .asVarargsCollector(Object[].class); MethodHandle asListFix = asListVar.asFixedArity(); assertEquals("[1]", asListVar.invoke(1).toString()); Exception caught = null; try { asListFix.invoke((Object)1); } catch (Exception ex) { caught = ex; } assert(caught instanceof ClassCastException); assertEquals("[two, too]", asListVar.invoke("two", "too").toString()); try { asListFix.invoke("two", "too"); } catch (Exception ex) { caught = ex; } assert(caught instanceof WrongMethodTypeException); Object[] argv = { "three", "thee", "tee" }; assertEquals("[three, thee, tee]", asListVar.invoke(argv).toString()); assertEquals("[three, thee, tee]", asListFix.invoke(argv).toString()); assertEquals(1, ((List) asListVar.invoke((Object)argv)).size()); assertEquals("[three, thee, tee]", asListFix.invoke((Object)argv).toString()); }} } @Test public void testAsTypeCornerCases() throws Throwable { {{ {} /// JAVADOC MethodHandle i2s = publicLookup() .findVirtual(Integer.class, "toString", methodType(String.class)); i2s = i2s.asType(i2s.type().unwrap()); MethodHandle l2s = publicLookup() .findVirtual(Long.class, "toString", methodType(String.class)); l2s = l2s.asType(l2s.type().unwrap()); Exception caught = null; try { i2s.asType(methodType(String.class, String.class)); } catch (Exception ex) { caught = ex; } assert(caught instanceof WrongMethodTypeException); i2s.asType(methodType(String.class, byte.class)); i2s.asType(methodType(String.class, Byte.class)); i2s.asType(methodType(String.class, Character.class)); i2s.asType(methodType(String.class, Integer.class)); l2s.asType(methodType(String.class, byte.class)); l2s.asType(methodType(String.class, Byte.class)); l2s.asType(methodType(String.class, Character.class)); l2s.asType(methodType(String.class, Integer.class)); l2s.asType(methodType(String.class, Long.class)); caught = null; try { i2s.asType(methodType(String.class, Long.class)); } catch (Exception ex) { caught = ex; } assert(caught instanceof WrongMethodTypeException); MethodHandle i2sGen = i2s.asType(methodType(String.class, Object.class)); MethodHandle l2sGen = l2s.asType(methodType(String.class, Object.class)); i2sGen.invoke(42); // int -> Integer -> Object -> Integer -> int i2sGen.invoke((byte)4); // byte -> Byte -> Object -> Byte -> byte -> int l2sGen.invoke(42); // int -> Integer -> Object -> Integer -> int l2sGen.invoke((byte)4); // byte -> Byte -> Object -> Byte -> byte -> int l2sGen.invoke(0x420000000L); caught = null; try { i2sGen.invoke(0x420000000L); } // long -> Long -> Object -> Integer CCE catch (Exception ex) { caught = ex; } assert(caught instanceof ClassCastException); caught = null; try { i2sGen.invoke("asdf"); } // String -> Object -> Integer CCE catch (Exception ex) { caught = ex; } assert(caught instanceof ClassCastException); {} }} } @Test public void testMutableCallSite() throws Throwable { {{ {} /// JAVADOC MutableCallSite name = new MutableCallSite(MethodType.methodType(String.class)); MethodHandle MH_name = name.dynamicInvoker(); MethodType MT_str1 = MethodType.methodType(String.class); MethodHandle MH_upcase = MethodHandles.lookup() .findVirtual(String.class, "toUpperCase", MT_str1); MethodHandle worker1 = MethodHandles.filterReturnValue(MH_name, MH_upcase); name.setTarget(MethodHandles.constant(String.class, "Rocky")); assertEquals("ROCKY", (String) worker1.invokeExact()); name.setTarget(MethodHandles.constant(String.class, "Fred")); assertEquals("FRED", (String) worker1.invokeExact()); // (mutation can be continued indefinitely) /* * *

* The same call site may be used in several places at once. *

 */
MethodType MT_str2 = MethodType.methodType(String.class, String.class);
MethodHandle MH_cat = lookup().findVirtual(String.class,
  "concat", methodType(String.class, String.class));
MethodHandle MH_dear = MethodHandles.insertArguments(MH_cat, 1, ", dear?");
MethodHandle worker2 = MethodHandles.filterReturnValue(MH_name, MH_dear);
assertEquals("Fred, dear?", (String) worker2.invokeExact());
name.setTarget(MethodHandles.constant(String.class, "Wilma"));
assertEquals("WILMA", (String) worker1.invokeExact());
assertEquals("Wilma, dear?", (String) worker2.invokeExact());
{}
            }}
    }

    @Test public void testSwitchPoint() throws Throwable {
        {{
{} /// JAVADOC
MethodHandle MH_strcat = MethodHandles.lookup()
    .findVirtual(String.class, "concat", MethodType.methodType(String.class, String.class));
SwitchPoint spt = new SwitchPoint();
assert(!spt.hasBeenInvalidated());
// the following steps may be repeated to re-use the same switch point:
MethodHandle worker1 = MH_strcat;
MethodHandle worker2 = MethodHandles.permuteArguments(MH_strcat, MH_strcat.type(), 1, 0);
MethodHandle worker = spt.guardWithTest(worker1, worker2);
assertEquals("method", (String) worker.invokeExact("met", "hod"));
SwitchPoint.invalidateAll(new SwitchPoint[]{ spt });
assert(spt.hasBeenInvalidated());
assertEquals("hodmet", (String) worker.invokeExact("met", "hod"));
{}
            }}
    }

    @Test public void testFoldArguments2() throws Throwable {
        {{
{} /// JAVADOC
// argument-based dispatch for methods of the form boolean x.___(y: String)
Lookup lookup = publicLookup();
// first, a tracing hack:
MethodHandle println = lookup.findVirtual(java.io.PrintStream.class, "println", methodType(void.class, String.class));
MethodHandle arrayToString = lookup.findStatic(Arrays.class, "toString", methodType(String.class, Object[].class));
MethodHandle concat = lookup.findVirtual(String.class, "concat", methodType(String.class, String.class));
MethodHandle arrayToString_DIS = filterReturnValue(arrayToString, concat.bindTo("DIS:"));
MethodHandle arrayToString_INV = filterReturnValue(arrayToString, concat.bindTo("INV:"));
MethodHandle printArgs_DIS = filterReturnValue(arrayToString_DIS, println.bindTo(System.out)).asVarargsCollector(Object[].class);
MethodHandle printArgs_INV = filterReturnValue(arrayToString_INV, println.bindTo(System.out)).asVarargsCollector(Object[].class);
// metaobject protocol:
MethodType mtype = methodType(boolean.class, String.class);
MethodHandle findVirtual = lookup.findVirtual(Lookup.class,
  "findVirtual", methodType(MethodHandle.class, Class.class, String.class, MethodType.class));
MethodHandle getClass = lookup.findVirtual(Object.class,
  "getClass", methodType(Class.class));
MethodHandle dispatch = findVirtual;
dispatch = filterArguments(dispatch, 1, getClass);
dispatch = insertArguments(dispatch, 3, mtype);
dispatch = dispatch.bindTo(lookup);
assertEquals(methodType(MethodHandle.class, Object.class, String.class), dispatch.type());
MethodHandle invoker = invoker(mtype.insertParameterTypes(0, Object.class));
// wrap tracing around the dispatch and invoke steps:
dispatch = foldArguments(dispatch, printArgs_DIS.asType(dispatch.type().changeReturnType(void.class)));
invoker = foldArguments(invoker, printArgs_INV.asType(invoker.type().changeReturnType(void.class)));
invoker = dropArguments(invoker, 2, String.class);  // ignore selector
// compose the dispatcher and the invoker:
MethodHandle invokeDispatched = foldArguments(invoker, dispatch);
Object x = "football", y = new java.util.Scanner("bar");
assert( (boolean) invokeDispatched.invokeExact(x, "startsWith", "foo"));
assert(!(boolean) invokeDispatched.invokeExact(x, "startsWith", "#"));
assert( (boolean) invokeDispatched.invokeExact(x, "endsWith", "all"));
assert(!(boolean) invokeDispatched.invokeExact(x, "endsWith", "foo"));
assert( (boolean) invokeDispatched.invokeExact(y, "hasNext", "[abc]+[rst]"));
assert(!(boolean) invokeDispatched.invokeExact(y, "hasNext", "[123]+[789]"));
            }}
    }

    /* ---- TEMPLATE ----
    @Test public void testFoo() throws Throwable {
        {{
{} /// JAVADOC
{}
            }}
    }
    */
}