--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/SLDebugTest.java	Wed Oct 07 17:17:56 2015 +0200
@@ -0,0 +1,241 @@
+/*
+ * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * The Universal Permissive License (UPL), Version 1.0
+ *
+ * Subject to the condition set forth below, permission is hereby granted to any
+ * person obtaining a copy of this software, associated documentation and/or
+ * data (collectively the "Software"), free of charge and under any and all
+ * copyright rights in the Software, and any and all patent rights owned or
+ * freely licensable by each licensor hereunder covering either (i) the
+ * unmodified Software as contributed to or provided by such licensor, or (ii)
+ * the Larger Works (as defined below), to deal in both
+ *
+ * (a) the Software, and
+ *
+ * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
+ * one is included with the Software each a "Larger Work" to which the Software
+ * is contributed by such licensors),
+ *
+ * without restriction, including without limitation the rights to copy, create
+ * derivative works of, display, perform, and distribute the Software and make,
+ * use, sell, offer for sale, import, export, have made, and have sold the
+ * Software and the Larger Work(s), and to sublicense the foregoing rights on
+ * either these or other terms.
+ *
+ * This license is subject to the following condition:
+ *
+ * The above copyright notice and either this complete permission notice or at a
+ * minimum a reference to the UPL must be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.oracle.truffle.sl.test;
+
+import com.oracle.truffle.api.debug.Debugger;
+import com.oracle.truffle.api.debug.ExecutionEvent;
+import com.oracle.truffle.api.debug.SuspendedEvent;
+import com.oracle.truffle.api.frame.MaterializedFrame;
+import com.oracle.truffle.api.source.LineLocation;
+import com.oracle.truffle.api.source.Source;
+import com.oracle.truffle.api.source.SourceSection;
+import com.oracle.truffle.api.vm.EventConsumer;
+import com.oracle.truffle.api.vm.PolyglotEngine;
+import java.io.ByteArrayOutputStream;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import org.junit.Test;
+
+public class SLDebugTest {
+    private Source factorial;
+    private Debugger debugger;
+    private Callable<?> run;
+    private SuspendedEvent suspendedEvent;
+    private Throwable ex;
+    private ExecutionEvent executionEvent;
+
+    @Test
+    public void stepInStepOver() throws Throwable {
+        // @formatter:off
+        factorial = Source.fromText(
+            "function main() {\n" +
+            "  res = fac(2);\n" +
+            "  println(res);\n" +
+            "  return res;\n" +
+            "}\n" +
+            "function fac(n) {\n" +
+            "  if (n <= 1) {\n" +
+            "    return 1;\n" +
+            "  }\n" +
+            "  nMinusOne = n - 1;\n" +
+            "  nMOFact = fac(nMinusOne);\n" +
+            "  res = n * nMOFact;\n" +
+            "  return res;\n" +
+            "}\n" +
+             "", "factorial.sl"
+        ).withMimeType("application/x-sl");
+        // @formatter:on
+
+        ByteArrayOutputStream os = new ByteArrayOutputStream();
+
+        PolyglotEngine engine = PolyglotEngine.buildNew().executor(Executors.newSingleThreadExecutor()).onEvent(new EventConsumer<ExecutionEvent>(ExecutionEvent.class) {
+            @Override
+            protected void on(ExecutionEvent event) {
+                onExecution(event);
+            }
+        }).onEvent(new EventConsumer<SuspendedEvent>(SuspendedEvent.class) {
+            @Override
+            protected void on(SuspendedEvent event) {
+                onSuspended(event);
+            }
+        }).setOut(os).build();
+
+        PolyglotEngine.Value value;
+        synchronized (this) {
+            value = engine.eval(factorial);
+            wait();
+        }
+        assertNotNull("Debugger initalized", debugger);
+
+        run(new Callable<Void>() {
+            @Override
+            public Void call() throws Exception {
+                LineLocation nMinusOne = factorial.createLineLocation(7);
+                debugger.setLineBreakpoint(0, nMinusOne, true);
+                executionEvent.prepareContinue();
+                return null;
+            }
+        });
+
+        assertNull("Parsing done", value.get());
+
+        PolyglotEngine.Value main = engine.findGlobalSymbol("main");
+        value = main.invoke(null);
+
+        run(new Callable<Void>() {
+            @Override
+            public Void call() throws Exception {
+                assertNull(suspendedEvent);
+                executionEvent.prepareStepInto();
+                return null;
+            }
+        });
+
+        run(new Callable<Void>() {
+            @Override
+            public Void call() throws Exception {
+                assertNotNull(suspendedEvent);
+                final MaterializedFrame frame = suspendedEvent.getFrame();
+                assertEquals("No arguments", 0, frame.getArguments().length);
+                assertEquals("one var slot", 1, frame.getFrameDescriptor().getSlots().size());
+                Object resName = frame.getFrameDescriptor().getSlots().get(0).getFrameDescriptor().getIdentifiers().iterator().next();
+                assertEquals("res", resName);
+                suspendedEvent.prepareStepInto(2);
+                suspendedEvent = null;
+                return null;
+            }
+        });
+
+        run(new Callable<Void>() {
+            @Override
+            public Void call() throws Exception {
+                assertLine(6);
+
+                final MaterializedFrame frame = suspendedEvent.getFrame();
+                assertEquals("One argument", 1, frame.getArguments().length);
+                assertEquals("One argument value 2", 2L, frame.getArguments()[0]);
+                suspendedEvent.prepareStepOver(1);
+                suspendedEvent = null;
+                return null;
+            }
+        });
+
+        run(new Callable<Void>() {
+            @Override
+            public Void call() throws Exception {
+                assertNotNull(suspendedEvent);
+
+                // XXX wrong step over:
+                // assertLine(7);
+
+                suspendedEvent.prepareContinue();
+                suspendedEvent = null;
+                return null;
+            }
+        });
+
+        run(null);
+
+        Number n = value.as(Number.class);
+        assertNotNull(n);
+        assertEquals("Factorial computed OK", 2, n.intValue());
+    }
+
+    synchronized void onExecution(ExecutionEvent event) {
+        executionEvent = event;
+        debugger = event.getDebugger();
+        notifyAll();
+        waitForWork();
+    }
+
+    synchronized void onSuspended(SuspendedEvent event) {
+        suspendedEvent = event;
+        notifyAll();
+        waitForWork();
+    }
+
+    private synchronized void run(Callable<?> callable) throws Throwable {
+        if (ex != null) {
+            throw ex;
+        }
+        while (run != null) {
+            wait();
+        }
+        run = callable;
+        notifyAll();
+        if (ex != null) {
+            throw ex;
+        }
+    }
+
+    private void waitForWork() {
+        try {
+            waitForWork0().call();
+        } catch (Throwable tmpEx) {
+            this.ex = tmpEx;
+        }
+
+    }
+
+    private synchronized Callable<?> waitForWork0() {
+        while (run == null) {
+            try {
+                wait();
+            } catch (InterruptedException tmpEx) {
+                throw new IllegalStateException(tmpEx);
+            }
+        }
+        Callable<?> c = run;
+        run = null;
+        notifyAll();
+        return c;
+    }
+
+    void assertLine(int line) {
+        assertNotNull(suspendedEvent);
+        final SourceSection expLoc = factorial.createSection("Line " + line, line);
+        final SourceSection sourceLoc = suspendedEvent.getNode().getEncapsulatingSourceSection();
+        assertEquals("Exp\n" + expLoc + "\nbut was\n" + sourceLoc, line, sourceLoc.getLineLocation().getLineNumber());
+    }
+}