changeset 30:43bc68e00352

Import the other java.dyn unit tests
author Gary Benson <gbenson@redhat.com>
date Tue, 01 Mar 2011 17:09:50 +0000
parents f5794124fd78
children e394d06d764d
files Makefile test/java/dyn/ClassValueTest.java test/java/dyn/InvokeGenericTest.java test/java/dyn/JavaDocExamplesTest.java
diffstat 4 files changed, 837 insertions(+), 3 deletions(-) [+]
line wrap: on
line diff
--- a/Makefile	Tue Mar 01 14:33:05 2011 +0000
+++ b/Makefile	Tue Mar 01 17:09:50 2011 +0000
@@ -25,16 +25,23 @@
 	  diff -ru {~/work/icedtea6/ports/,}hotspot/src/$$i; \
 	done > patch.patch || true
 
-test/java/dyn/MethodHandlesTest.class: test/java/dyn/MethodHandlesTest.java
-	$(JAVADIR)/bin/javac -cp $(JUNITJAR) $<
+test/java/dyn/%.class: test/java/dyn/%.java
+	$(JAVADIR)/bin/javac -d . -cp $(JUNITJAR) $<
 
-test: debugzero test/java/dyn/MethodHandlesTest.class
+test: debugzero \
+	test/java/dyn/ClassValueTest.class \
+	test/java/dyn/InvokeGenericTest.class \
+	test/java/dyn/JavaDocExamplesTest.class \
+	test/java/dyn/MethodHandlesTest.class
 	hotspot/build/linux/jdk-linux-zero/debug/bin/java \
 	  -XX:+UnlockExperimentalVMOptions \
 	  -XX:+EnableMethodHandles \
 	  -XX:+EnableInvokeDynamic \
 	  -Dtest.java.dyn.MethodHandlesTest.verbosity=0 \
 	  -cp $(JUNITJAR):. org.junit.runner.JUnitCore \
+	  test.java.dyn.ClassValueTest \
+	  test.java.dyn.InvokeGenericTest \
+	  test.java.dyn.JavaDocExamplesTest \
 	  test.java.dyn.MethodHandlesTest
 
 .PHONY: default $(TARGETS) build clean patch test
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/java/dyn/ClassValueTest.java	Tue Mar 01 17:09:50 2011 +0000
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2010, 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 tests for class-specific values
+ * @compile ClassValueTest.java
+ * @run junit/othervm test.java.dyn.ClassValueTest
+ */
+
+/*
+  Manually:
+   $ $JAVA7X_HOME/bin/javac -d foo -cp $JUNIT4_JAR test/java/dyn/ClassValueTest.java
+   $ $JAVA7X_HOME/bin/java -cp foo:$JUNIT4_JAR org.junit.runner.JUnitCore test.java.dyn.ClassValueTest
+  Output: .testAdd => 1000 : Integer
+ */
+
+package test.java.dyn;
+
+import java.util.*;
+
+import java.dyn.*;
+
+import org.junit.*;
+import static org.junit.Assert.*;
+
+/**
+ * @author jrose
+ */
+public class ClassValueTest {
+    static String nameForCV1(Class<?> type) {
+        return "CV1:" + type.getName();
+    }
+    static int countForCV1;
+    static final ClassValue<String> CV1 = new CV1();
+    private static class CV1 extends ClassValue<String> {
+        protected String computeValue(Class<?> type) {
+            countForCV1++;
+            return nameForCV1(type);
+        }
+    }
+
+    static final Class[] CLASSES = {
+        String.class,
+        Integer.class,
+        int.class,
+        boolean[].class,
+        char[][].class,
+        ClassValueTest.class
+    };
+
+    @Test
+    public void testGet() {
+        countForCV1 = 0;
+        for (Class c : CLASSES) {
+            assertEquals(nameForCV1(c), CV1.get(c));
+        }
+        assertEquals(CLASSES.length, countForCV1);
+        for (Class c : CLASSES) {
+            assertEquals(nameForCV1(c), CV1.get(c));
+        }
+        assertEquals(CLASSES.length, countForCV1);
+    }
+
+    @Test
+    public void testRemove() {
+        for (Class c : CLASSES) {
+            CV1.get(c);
+        }
+        countForCV1 = 0;
+        int REMCOUNT = 3;
+        for (int i = 0; i < REMCOUNT; i++) {
+            CV1.remove(CLASSES[i]);
+        }
+        assertEquals(0, countForCV1);  // no change
+        for (Class c : CLASSES) {
+            assertEquals(nameForCV1(c), CV1.get(c));
+        }
+        assertEquals(REMCOUNT, countForCV1);
+    }
+
+    static String nameForCVN(Class<?> type, int n) {
+        return "CV[" + n + "]" + type.getName();
+    }
+    static int countForCVN;
+    static class CVN extends ClassValue<String> {
+        final int n;
+        CVN(int n) { this.n = n; }
+        protected String computeValue(Class<?> type) {
+            countForCVN++;
+            return nameForCVN(type, n);
+        }
+    };
+
+    @Test
+    public void testGetMany() {
+        int CVN_COUNT1 = 100, CVN_COUNT2 = 100;
+        CVN cvns[] = new CVN[CVN_COUNT1 * CVN_COUNT2];
+        for (int n = 0; n < cvns.length; n++) {
+            cvns[n] = new CVN(n);
+        }
+        countForCVN = 0;
+        for (int pass = 0; pass <= 2; pass++) {
+            for (int i1 = 0; i1 < CVN_COUNT1; i1++) {
+                eachClass:
+                for (Class c : CLASSES) {
+                    for (int i2 = 0; i2 < CVN_COUNT2; i2++) {
+                        int n = i1*CVN_COUNT2 + i2;
+                        assertEquals(0, countForCVN);
+                        assertEquals(nameForCVN(c, n), cvns[n].get(c));
+                        cvns[n].get(c);  //get it again
+                        //System.out.println("getting "+n+":"+cvns[n].get(c));
+                        boolean doremove = (((i1 + i2) & 3) == 0);
+                        switch (pass) {
+                        case 0:
+                            assertEquals(1, countForCVN);
+                            break;
+                        case 1:
+                            // remove on middle pass
+                            assertEquals(0, countForCVN);
+                            if (doremove) {
+                                //System.out.println("removing "+n+":"+cvns[n].get(c));
+                                cvns[n].remove(c);
+                                assertEquals(0, countForCVN);
+                            }
+                            break;
+                        case 2:
+                            assertEquals(doremove ? 1 : 0, countForCVN);
+                            break;
+                        }
+                        countForCVN = 0;
+                        if (i1 > i2 && i1 < i2+5)  continue eachClass;  // leave diagonal gap
+                    }
+                }
+            }
+        }
+        assertEquals(countForCVN, 0);
+        for (int n = 0; n < cvns.length; n++) {
+            for (Class c : CLASSES) {
+                assertEquals(nameForCVN(c, n), cvns[n].get(c));
+            }
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/java/dyn/InvokeGenericTest.java	Tue Mar 01 17:09:50 2011 +0000
@@ -0,0 +1,484 @@
+/*
+ * Copyright (c) 2009, 2010, 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 unit tests for java.dyn.MethodHandle.invokeGeneric
+ * @compile -XDallowTransitionalJSR292=no -target 7 InvokeGenericTest.java
+ * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles test.java.dyn.InvokeGenericTest
+ */
+
+package test.java.dyn;
+
+import java.dyn.*;
+import static java.dyn.MethodHandles.*;
+import static java.dyn.MethodType.*;
+import java.lang.reflect.*;
+import java.util.*;
+import org.junit.*;
+import static org.junit.Assert.*;
+import static org.junit.Assume.*;
+
+
+/**
+ *
+ * @author jrose
+ */
+public class InvokeGenericTest {
+    // How much output?
+    static int verbosity = 0;
+    static {
+        String vstr = System.getProperty("test.java.dyn.InvokeGenericTest.verbosity");
+        if (vstr != null)  verbosity = Integer.parseInt(vstr);
+    }
+
+    @Test
+    public void testFirst() throws Throwable {
+        verbosity += 9; try {
+            // left blank for debugging
+        } finally { printCounts(); verbosity -= 9; }
+    }
+
+    public InvokeGenericTest() {
+    }
+
+    @Before
+    public void checkImplementedPlatform() {
+        boolean platformOK = false;
+        Properties properties = System.getProperties();
+        String vers = properties.getProperty("java.vm.version");
+        String name = properties.getProperty("java.vm.name");
+        String arch = properties.getProperty("os.arch");
+        if ((arch.equals("amd64") || arch.equals("i386") || arch.equals("x86") ||
+             arch.equals("sparc") || arch.equals("sparcv9")) &&
+            (name.contains("Client") || name.contains("Server"))
+            ) {
+            platformOK = true;
+        } else {
+            System.err.println("Skipping tests for unsupported platform: "+Arrays.asList(vers, name, arch));
+        }
+        assumeTrue(platformOK);
+    }
+
+    String testName;
+    static int allPosTests, allNegTests;
+    int posTests, negTests;
+    @After
+    public void printCounts() {
+        if (verbosity >= 2 && (posTests | negTests) != 0) {
+            System.out.println();
+            if (posTests != 0)  System.out.println("=== "+testName+": "+posTests+" positive test cases run");
+            if (negTests != 0)  System.out.println("=== "+testName+": "+negTests+" negative test cases run");
+            allPosTests += posTests;
+            allNegTests += negTests;
+            posTests = negTests = 0;
+        }
+    }
+    void countTest(boolean positive) {
+        if (positive) ++posTests;
+        else          ++negTests;
+    }
+    void countTest() { countTest(true); }
+    void startTest(String name) {
+        if (testName != null)  printCounts();
+        if (verbosity >= 1)
+            System.out.println(name);
+        posTests = negTests = 0;
+        testName = name;
+    }
+
+    @BeforeClass
+    public static void setUpClass() throws Exception {
+        calledLog.clear();
+        calledLog.add(null);
+        nextArgVal = INITIAL_ARG_VAL;
+    }
+
+    @AfterClass
+    public static void tearDownClass() throws Exception {
+        int posTests = allPosTests, negTests = allNegTests;
+        if (verbosity >= 2 && (posTests | negTests) != 0) {
+            System.out.println();
+            if (posTests != 0)  System.out.println("=== "+posTests+" total positive test cases");
+            if (negTests != 0)  System.out.println("=== "+negTests+" total negative test cases");
+        }
+    }
+
+    static List<Object> calledLog = new ArrayList<Object>();
+    static Object logEntry(String name, Object... args) {
+        return Arrays.asList(name, Arrays.asList(args));
+    }
+    static Object called(String name, Object... args) {
+        Object entry = logEntry(name, args);
+        calledLog.add(entry);
+        return entry;
+    }
+    static void assertCalled(String name, Object... args) {
+        Object expected = logEntry(name, args);
+        Object actual   = calledLog.get(calledLog.size() - 1);
+        if (expected.equals(actual) && verbosity < 9)  return;
+        System.out.println("assertCalled "+name+":");
+        System.out.println("expected:   "+expected);
+        System.out.println("actual:     "+actual);
+        System.out.println("ex. types:  "+getClasses(expected));
+        System.out.println("act. types: "+getClasses(actual));
+        assertEquals("previous method call", expected, actual);
+    }
+    static void printCalled(MethodHandle target, String name, Object... args) {
+        if (verbosity >= 3)
+            System.out.println("calling MH="+target+" to "+name+Arrays.toString(args));
+    }
+
+    static Object castToWrapper(Object value, Class<?> dst) {
+        Object wrap = null;
+        if (value instanceof Number)
+            wrap = castToWrapperOrNull(((Number)value).longValue(), dst);
+        if (value instanceof Character)
+            wrap = castToWrapperOrNull((char)(Character)value, dst);
+        if (wrap != null)  return wrap;
+        return dst.cast(value);
+    }
+
+    static Object castToWrapperOrNull(long value, Class<?> dst) {
+        if (dst == int.class || dst == Integer.class)
+            return (int)(value);
+        if (dst == long.class || dst == Long.class)
+            return (long)(value);
+        if (dst == char.class || dst == Character.class)
+            return (char)(value);
+        if (dst == short.class || dst == Short.class)
+            return (short)(value);
+        if (dst == float.class || dst == Float.class)
+            return (float)(value);
+        if (dst == double.class || dst == Double.class)
+            return (double)(value);
+        if (dst == byte.class || dst == Byte.class)
+            return (byte)(value);
+        if (dst == boolean.class || dst == boolean.class)
+            return ((value % 29) & 1) == 0;
+        return null;
+    }
+
+    static final int ONE_MILLION = (1000*1000),  // first int value
+                     TEN_BILLION = (10*1000*1000*1000),  // scale factor to reach upper 32 bits
+                     INITIAL_ARG_VAL = ONE_MILLION << 1;  // <<1 makes space for sign bit;
+    static long nextArgVal;
+    static long nextArg(boolean moreBits) {
+        long val = nextArgVal++;
+        long sign = -(val & 1); // alternate signs
+        val >>= 1;
+        if (moreBits)
+            // Guarantee some bits in the high word.
+            // In any case keep the decimal representation simple-looking,
+            // with lots of zeroes, so as not to make the printed decimal
+            // strings unnecessarily noisy.
+            val += (val % ONE_MILLION) * TEN_BILLION;
+        return val ^ sign;
+    }
+    static int nextArg() {
+        // Produce a 32-bit result something like ONE_MILLION+(smallint).
+        // Example: 1_000_042.
+        return (int) nextArg(false);
+    }
+    static long nextArg(Class<?> kind) {
+        if (kind == long.class   || kind == Long.class ||
+            kind == double.class || kind == Double.class)
+            // produce a 64-bit result something like
+            // ((TEN_BILLION+1) * (ONE_MILLION+(smallint)))
+            // Example: 10_000_420_001_000_042.
+            return nextArg(true);
+        return (long) nextArg();
+    }
+
+    static Object randomArg(Class<?> param) {
+        Object wrap = castToWrapperOrNull(nextArg(param), param);
+        if (wrap != null) {
+            return wrap;
+        }
+//        import sun.dyn.util.Wrapper;
+//        Wrapper wrap = Wrapper.forBasicType(dst);
+//        if (wrap == Wrapper.OBJECT && Wrapper.isWrapperType(dst))
+//            wrap = Wrapper.forWrapperType(dst);
+//        if (wrap != Wrapper.OBJECT)
+//            return wrap.wrap(nextArg++);
+        if (param.isInterface()) {
+            for (Class<?> c : param.getClasses()) {
+                if (param.isAssignableFrom(c) && !c.isInterface())
+                    { param = c; break; }
+            }
+        }
+        if (param.isInterface() || param.isAssignableFrom(String.class))
+            return "#"+nextArg();
+        else
+            try {
+                return param.newInstance();
+            } catch (InstantiationException ex) {
+            } catch (IllegalAccessException ex) {
+            }
+        return null;  // random class not Object, String, Integer, etc.
+    }
+    static Object[] randomArgs(Class<?>... params) {
+        Object[] args = new Object[params.length];
+        for (int i = 0; i < args.length; i++)
+            args[i] = randomArg(params[i]);
+        return args;
+    }
+    static Object[] randomArgs(int nargs, Class<?> param) {
+        Object[] args = new Object[nargs];
+        for (int i = 0; i < args.length; i++)
+            args[i] = randomArg(param);
+        return args;
+    }
+
+    static final Object ANON_OBJ = new Object();
+    static Object zeroArg(Class<?> param) {
+        Object x = castToWrapperOrNull(0L, param);
+        if (x != null)  return x;
+        if (param.isInterface() || param.isAssignableFrom(String.class))  return "\"\"";
+        if (param == Object.class)  return ANON_OBJ;
+        if (param.getComponentType() != null)  return Array.newInstance(param.getComponentType(), 0);
+        return null;
+    }
+    static Object[] zeroArgs(Class<?>... params) {
+        Object[] args = new Object[params.length];
+        for (int i = 0; i < args.length; i++)
+            args[i] = zeroArg(params[i]);
+        return args;
+    }
+    static Object[] zeroArgs(List<Class<?>> params) {
+        return zeroArgs(params.toArray(new Class<?>[0]));
+    }
+
+    static <T, E extends T> T[] array(Class<T[]> atype, E... a) {
+        return Arrays.copyOf(a, a.length, atype);
+    }
+    static <T> T[] cat(T[] a, T... b) {
+        int alen = a.length, blen = b.length;
+        if (blen == 0)  return a;
+        T[] c = Arrays.copyOf(a, alen + blen);
+        System.arraycopy(b, 0, c, alen, blen);
+        return c;
+    }
+    static Integer[] boxAll(int... vx) {
+        Integer[] res = new Integer[vx.length];
+        for (int i = 0; i < res.length; i++) {
+            res[i] = vx[i];
+        }
+        return res;
+    }
+    static Object getClasses(Object x) {
+        if (x == null)  return x;
+        if (x instanceof String)  return x;  // keep the name
+        if (x instanceof List) {
+            // recursively report classes of the list elements
+            Object[] xa = ((List)x).toArray();
+            for (int i = 0; i < xa.length; i++)
+                xa[i] = getClasses(xa[i]);
+            return Arrays.asList(xa);
+        }
+        return x.getClass().getSimpleName();
+    }
+
+    static MethodHandle changeArgTypes(MethodHandle target, Class<?> argType) {
+        return changeArgTypes(target, 0, 999, argType);
+    }
+    static MethodHandle changeArgTypes(MethodHandle target,
+            int beg, int end, Class<?> argType) {
+        MethodType targetType = target.type();
+        end = Math.min(end, targetType.parameterCount());
+        ArrayList<Class<?>> argTypes = new ArrayList<Class<?>>(targetType.parameterList());
+        Collections.fill(argTypes.subList(beg, end), argType);
+        MethodType ttype2 = MethodType.methodType(targetType.returnType(), argTypes);
+        return MethodHandles.convertArguments(target, ttype2);
+    }
+
+    // This lookup is good for all members in and under InvokeGenericTest.
+    static final Lookup LOOKUP = MethodHandles.lookup();
+
+    Map<List<Class<?>>, MethodHandle> CALLABLES = new HashMap<List<Class<?>>, MethodHandle>();
+    MethodHandle callable(List<Class<?>> params) {
+        MethodHandle mh = CALLABLES.get(params);
+        if (mh == null) {
+            mh = collectArguments(collector_MH, methodType(Object.class, params));
+            CALLABLES.put(params, mh);
+        }
+        return mh;
+    }
+    MethodHandle callable(Class<?>... params) {
+        return callable(Arrays.asList(params));
+    }
+    private static Object collector(Object... args) {
+        return Arrays.asList(args);
+    }
+    private static final MethodHandle collector_MH;
+    static {
+        try {
+            collector_MH
+                = LOOKUP.findStatic(LOOKUP.lookupClass(),
+                                    "collector",
+                                    methodType(Object.class, Object[].class));
+        } catch (NoAccessException ex) {
+            throw new RuntimeException(ex);
+        }
+    }
+
+    @Test
+    public void testSimple() throws Throwable {
+        startTest("testSimple");
+        countTest();
+        String[] args = { "one", "two" };
+        MethodHandle mh = callable(Object.class, String.class);
+        Object res; List resl;
+        res = resl = (List) mh.invokeGeneric((String)args[0], (Object)args[1]);
+        //System.out.println(res);
+        assertEquals(Arrays.asList(args), res);
+    }
+
+    @Test
+    public void testWrongArgumentCount() throws Throwable {
+        startTest("testWrongArgumentCount");
+        for (int i = 0; i <= 10; i++) {
+            testWrongArgumentCount(Collections.<Class<?>>nCopies(i, Integer.class));
+            if (i <= 4) {
+                testWrongArgumentCount(Collections.<Class<?>>nCopies(i, int.class));
+                testWrongArgumentCount(Collections.<Class<?>>nCopies(i, long.class));
+            }
+        }
+    }
+    public void testWrongArgumentCount(List<Class<?>> params) throws Throwable {
+        int max = params.size();
+        for (int i = 0; i < max; i++) {
+            List<Class<?>> params2 = params.subList(0, i);
+            for (int k = 0; k <= 2; k++) {
+                if (k == 1)  params  = methodType(Object.class,  params).generic().parameterList();
+                if (k == 2)  params2 = methodType(Object.class, params2).generic().parameterList();
+                testWrongArgumentCount(params, params2);
+                testWrongArgumentCount(params2, params);
+            }
+        }
+    }
+    public void testWrongArgumentCount(List<Class<?>> expect, List<Class<?>> observe) throws Throwable {
+        countTest(false);
+        if (expect.equals(observe))
+            assert(false);
+        MethodHandle target = callable(expect);
+        Object[] args = zeroArgs(observe);
+        Object junk;
+        try {
+            switch (args.length) {
+            case 0:
+                junk = target.invokeGeneric(); break;
+            case 1:
+                junk = target.invokeGeneric(args[0]); break;
+            case 2:
+                junk = target.invokeGeneric(args[0], args[1]); break;
+            case 3:
+                junk = target.invokeGeneric(args[0], args[1], args[2]); break;
+            case 4:
+                junk = target.invokeGeneric(args[0], args[1], args[2], args[3]); break;
+            default:
+                junk = target.invokeWithArguments(args); break;
+            }
+        } catch (WrongMethodTypeException ex) {
+            return;
+        } catch (Exception ex) {
+            throw new RuntimeException("wrong exception calling "+target+target.type()+" on "+Arrays.asList(args)+" : "+ex);
+        }
+        throw new RuntimeException("bad success calling "+target+target.type()+" on "+Arrays.asList(args));
+    }
+
+    /** Make a list of all combinations of the given types, with the given arities.
+     *  A void return type is possible iff the first type is void.class.
+     */
+    static List<MethodType> allMethodTypes(int minargc, int maxargc, Class<?>... types) {
+        ArrayList<MethodType> result = new ArrayList<MethodType>();
+        if (types.length > 0) {
+            ArrayList<MethodType> argcTypes = new ArrayList<MethodType>();
+            // build arity-zero types first
+            for (Class<?> rtype : types) {
+                argcTypes.add(MethodType.methodType(rtype));
+            }
+            if (types[0] == void.class)
+                // void is not an argument type
+                types = Arrays.copyOfRange(types, 1, types.length);
+            for (int argc = 0; argc <= maxargc; argc++) {
+                if (argc >= minargc)
+                    result.addAll(argcTypes);
+                if (argc >= maxargc)
+                    break;
+                ArrayList<MethodType> prevTypes = argcTypes;
+                argcTypes = new ArrayList<MethodType>();
+                for (MethodType prevType : prevTypes) {
+                    for (Class<?> ptype : types) {
+                        argcTypes.add(prevType.insertParameterTypes(argc, ptype));
+                    }
+                }
+            }
+        }
+        return Collections.unmodifiableList(result);
+    }
+    static List<MethodType> allMethodTypes(int argc, Class<?>... types) {
+        return allMethodTypes(argc, argc, types);
+    }
+
+    interface RandomInterface { }
+
+    MethodHandle toString_MH;
+
+    @Test
+    public void testReferenceConversions() throws Throwable {
+        startTest("testReferenceConversions");
+        toString_MH = LOOKUP.
+            findVirtual(Object.class, "toString", MethodType.methodType(String.class));
+        String[] args = { "one", "two" };
+        for (MethodType type : allMethodTypes(2, Object.class, String.class, RandomInterface.class)) {
+            testReferenceConversions(type, args);
+        }
+    }
+    public void testReferenceConversions(MethodType type, Object... args) throws Throwable {
+        countTest();
+        if (verbosity > 3)  System.out.println("target type: "+type);
+        MethodHandle mh = callable(type.parameterList());
+        MethodHandle tsdrop = MethodHandles.dropArguments(toString_MH, 1, type.parameterList());
+        mh = MethodHandles.foldArguments(tsdrop, mh);
+        mh = mh.asType(type);
+        Object res = mh.invokeGeneric((String)args[0], (Object)args[1]);
+        //System.out.println(res);
+        assertEquals(Arrays.asList(args).toString(), res);
+    }
+
+
+    @Test @Ignore("known failure pending 6939861")
+    public void testBoxConversions() throws Throwable {
+        startTest("testBoxConversions");
+        countTest();
+        Integer[] args = { 1, 2 };
+        MethodHandle mh = callable(Object.class, int.class);
+        Object res; List resl;
+        res = resl = (List) mh.invokeGeneric((int)args[0], (Object)args[1]);
+        //System.out.println(res);
+        assertEquals(Arrays.asList(args), res);
+    }
+
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/java/dyn/JavaDocExamplesTest.java	Tue Mar 01 17:09:50 2011 +0000
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2009, 2010, 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.dyn API
+ * @compile -XDallowTransitionalJSR292=no JavaDocExamplesTest.java
+ * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles test.java.dyn.JavaDocExamplesTest
+ */
+
+/*
+---- To run outside jtreg:
+$ $JAVA7X_HOME/bin/javac -cp $JUNIT4_JAR -d /tmp/Classes \
+   $DAVINCI/sources/jdk/test/java/dyn/JavaDocExamplesTest.java
+$ $JAVA7X_HOME/bin/java   -cp $JUNIT4_JAR:/tmp/Classes \
+   -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles \
+   -Dtest.java.dyn.JavaDocExamplesTest.verbosity=1 \
+     test.java.dyn.JavaDocExamplesTest
+----
+*/
+
+package test.java.dyn;
+
+import java.dyn.*;
+import static java.dyn.MethodHandles.*;
+import static java.dyn.MethodType.*;
+
+import java.lang.reflect.*;
+import java.util.*;
+
+import org.junit.*;
+import static org.junit.Assert.*;
+import static org.junit.Assume.*;
+
+
+/**
+ * @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) {
+        org.junit.runner.JUnitCore.runClasses(JavaDocExamplesTest.class);
+    }
+    // How much output?
+    static int verbosity = Integer.getInteger("test.java.dyn.JavaDocExamplesTest.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 NoAccessException is intercepted:
+static final private MethodHandle CONCAT_2, HASHCODE_2;
+static {
+  try {
+    CONCAT_2 = LOOKUP.findVirtual(String.class,
+      "concat", methodType(String.class, String.class));
+    HASHCODE_2 = LOOKUP.findVirtual(Object.class,
+      "hashCode", methodType(int.class));
+   } catch (NoAccessException ex) {
+     throw new RuntimeException(ex);
+   }
+}
+{}
+
+    @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 testDropArguments() throws Throwable {
+        {{
+{} /// 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
+            }}
+    }
+
+    static void assertEquals(Object exp, Object act) {
+        if (verbosity > 0)
+            System.out.println("result: "+act);
+        Assert.assertEquals(exp, act);
+    }
+
+static MethodHandle asList;
+    @Test public void testWithTypeHandler() throws Throwable {
+        {{
+{} /// JAVADOC
+MethodHandle makeEmptyList = MethodHandles.constant(List.class, Arrays.asList());
+MethodHandle asList = lookup()
+  .findStatic(Arrays.class, "asList", methodType(List.class, Object[].class));
+
+JavaDocExamplesTest.asList = asList;
+/*
+static MethodHandle collectingTypeHandler(MethodHandle base, MethodType newType) {
+  return asList.asCollector(Object[].class, newType.parameterCount()).asType(newType);
+}
+*/
+
+MethodHandle collectingTypeHandler = lookup()
+  .findStatic(lookup().lookupClass(), "collectingTypeHandler",
+     methodType(MethodHandle.class, MethodHandle.class, MethodType.class));
+MethodHandle makeAnyList = makeEmptyList.withTypeHandler(collectingTypeHandler);
+
+assertEquals("[]", makeAnyList.invokeGeneric().toString());
+assertEquals("[1]", makeAnyList.invokeGeneric(1).toString());
+assertEquals("[two, too]", makeAnyList.invokeGeneric("two", "too").toString());
+            }}
+    }
+
+static MethodHandle collectingTypeHandler(MethodHandle base, MethodType newType) {
+    //System.out.println("Converting "+asList+" to "+newType);
+    MethodHandle conv = asList.asCollector(Object[].class, newType.parameterCount()).asType(newType);
+    //System.out.println(" =>"+conv);
+    return conv;
+}
+
+}