diff --git a/idea/tests/org/jetbrains/jet/plugin/debugger/MockReferenceType.java b/idea/tests/org/jetbrains/jet/plugin/debugger/MockReferenceType.java
new file mode 100644
index 00000000000..1de5acd358b
--- /dev/null
+++ b/idea/tests/org/jetbrains/jet/plugin/debugger/MockReferenceType.java
@@ -0,0 +1,264 @@
+/*
+ * Copyright 2010-2012 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet.plugin.debugger;
+
+import com.sun.jdi.*;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * @author udalov
+ */
+public class MockReferenceType implements ReferenceType {
+    private final String name;
+
+    public MockReferenceType(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String name() {
+        return name;
+    }
+
+
+    @Override
+    public String signature() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public String genericSignature() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public ClassLoaderReference classLoader() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public String sourceName() throws AbsentInformationException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<String> sourceNames(String s) throws AbsentInformationException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<String> sourcePaths(String s) throws AbsentInformationException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public String sourceDebugExtension() throws AbsentInformationException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isStatic() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isAbstract() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isFinal() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isPrepared() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isVerified() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isInitialized() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean failedToInitialize() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Field> fields() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Field> visibleFields() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Field> allFields() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Field fieldByName(String s) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Method> methods() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Method> visibleMethods() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Method> allMethods() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Method> methodsByName(String s) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Method> methodsByName(String s, String s1) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<ReferenceType> nestedTypes() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Value getValue(Field field) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Map<Field, Value> getValues(List<? extends Field> fields) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public ClassObjectReference classObject() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Location> allLineLocations() throws AbsentInformationException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Location> allLineLocations(String s, String s1) throws AbsentInformationException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Location> locationsOfLine(int i) throws AbsentInformationException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<Location> locationsOfLine(String s, String s1, int i) throws AbsentInformationException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<String> availableStrata() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public String defaultStratum() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<ObjectReference> instances(long l) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public int majorVersion() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public int minorVersion() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public int constantPoolCount() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public byte[] constantPool() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public int modifiers() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isPrivate() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isPackagePrivate() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isProtected() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isPublic() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public int compareTo(ReferenceType o) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public VirtualMachine virtualMachine() {
+        throw new UnsupportedOperationException();
+    }
+}
diff --git a/idea/tests/org/jetbrains/jet/plugin/debugger/MockVirtualMachine.java b/idea/tests/org/jetbrains/jet/plugin/debugger/MockVirtualMachine.java
new file mode 100644
index 00000000000..333833ae48e
--- /dev/null
+++ b/idea/tests/org/jetbrains/jet/plugin/debugger/MockVirtualMachine.java
@@ -0,0 +1,296 @@
+/*
+ * Copyright 2010-2012 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet.plugin.debugger;
+
+import com.sun.jdi.*;
+import com.sun.jdi.event.EventQueue;
+import com.sun.jdi.request.EventRequestManager;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * @author udalov
+ */
+public class MockVirtualMachine implements VirtualMachine {
+    @Override
+    public List<ThreadGroupReference> topLevelThreadGroups() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public String version() {
+        return "1.6";
+    }
+
+
+    @Override
+    public List<ReferenceType> classesByName(String s) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<ReferenceType> allClasses() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void redefineClasses(Map<? extends ReferenceType, byte[]> map) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public List<ThreadReference> allThreads() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public void suspend() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void resume() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public EventQueue eventQueue() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public EventRequestManager eventRequestManager() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public BooleanValue mirrorOf(boolean b) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public ByteValue mirrorOf(byte b) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public CharValue mirrorOf(char c) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public ShortValue mirrorOf(short i) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public IntegerValue mirrorOf(int i) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public LongValue mirrorOf(long l) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public FloatValue mirrorOf(float v) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public DoubleValue mirrorOf(double v) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public StringReference mirrorOf(String s) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public VoidValue mirrorOfVoid() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Process process() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void dispose() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void exit(int i) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void setDefaultStratum(String s) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public String getDefaultStratum() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public String description() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public String name() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void setDebugTraceMode(int i) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean canWatchFieldModification() {
+        return false;
+    }
+
+    @Override
+    public boolean canWatchFieldAccess() {
+        return false;
+    }
+
+    @Override
+    public boolean canGetBytecodes() {
+        return false;
+    }
+
+    @Override
+    public boolean canGetSyntheticAttribute() {
+        return false;
+    }
+
+    @Override
+    public boolean canGetOwnedMonitorInfo() {
+        return false;
+    }
+
+    @Override
+    public boolean canGetCurrentContendedMonitor() {
+        return false;
+    }
+
+    @Override
+    public boolean canGetMonitorInfo() {
+        return false;
+    }
+
+    @Override
+    public boolean canUseInstanceFilters() {
+        return false;
+    }
+
+    @Override
+    public boolean canRedefineClasses() {
+        return false;
+    }
+
+    @Override
+    public boolean canAddMethod() {
+        return false;
+    }
+
+    @Override
+    public boolean canUnrestrictedlyRedefineClasses() {
+        return false;
+    }
+
+    @Override
+    public boolean canPopFrames() {
+        return false;
+    }
+
+    @Override
+    public boolean canGetSourceDebugExtension() {
+        return false;
+    }
+
+    @Override
+    public boolean canRequestVMDeathEvent() {
+        return false;
+    }
+
+    @Override
+    public boolean canGetMethodReturnValues() {
+        return false;
+    }
+
+    @Override
+    public boolean canGetInstanceInfo() {
+        return false;
+    }
+
+    @Override
+    public boolean canUseSourceNameFilters() {
+        return false;
+    }
+
+    @Override
+    public boolean canForceEarlyReturn() {
+        return false;
+    }
+
+    @Override
+    public boolean canBeModified() {
+        return false;
+    }
+
+    @Override
+    public boolean canRequestMonitorEvents() {
+        return false;
+    }
+
+    @Override
+    public boolean canGetMonitorFrameInfo() {
+        return false;
+    }
+
+    @Override
+    public boolean canGetClassFileVersion() {
+        return false;
+    }
+
+    @Override
+    public boolean canGetConstantPool() {
+        return false;
+    }
+
+    @Override
+    public long[] instanceCounts(List<? extends ReferenceType> types) {
+        return new long[0];
+    }
+
+    @Override
+    public VirtualMachine virtualMachine() {
+        return this;
+    }
+}
diff --git a/idea/tests/org/jetbrains/jet/plugin/debugger/PositionManagerTestCase.java b/idea/tests/org/jetbrains/jet/plugin/debugger/PositionManagerTestCase.java
new file mode 100644
index 00000000000..bcac12b0363
--- /dev/null
+++ b/idea/tests/org/jetbrains/jet/plugin/debugger/PositionManagerTestCase.java
@@ -0,0 +1,203 @@
+/*
+ * Copyright 2010-2012 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet.plugin.debugger;
+
+import com.google.common.collect.Maps;
+import com.intellij.debugger.NoDataException;
+import com.intellij.debugger.PositionManager;
+import com.intellij.debugger.PositionManagerFactory;
+import com.intellij.debugger.SourcePosition;
+import com.intellij.debugger.engine.DebugProcess;
+import com.intellij.debugger.engine.DebugProcessEvents;
+import com.intellij.debugger.jdi.VirtualMachineProxyImpl;
+import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.util.io.FileUtil;
+import com.intellij.openapi.util.text.StringUtil;
+import com.intellij.psi.PsiFile;
+import com.intellij.testFramework.PlatformTestCase;
+import com.sun.jdi.*;
+import org.jetbrains.jet.JetTestUtils;
+import org.jetbrains.jet.codegen.ClassFileFactory;
+import org.jetbrains.jet.codegen.GenerationUtils;
+import org.jetbrains.jet.lang.psi.JetFile;
+import org.jetbrains.jet.utils.ExceptionUtils;
+
+import javax.swing.*;
+import java.io.File;
+import java.io.IOException;
+import java.util.*;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * @author udalov
+ */
+public abstract class PositionManagerTestCase extends PlatformTestCase {
+
+    // Breakpoint is given as a line comment on a specific line, containing the name of the class, where that line can be found.
+    // This pattern matches against these line comments and saves the class name in the first group
+    private static final Pattern breakpointPattern = Pattern.compile("^.*//\\s*([a-zA-Z0-9._/$]*)\\s*$");
+
+    protected abstract String getTestDataPath();
+
+    protected abstract PositionManagerFactory getPositionManagerFactory();
+
+    @Override
+    protected final void setUp() throws Exception {
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    PositionManagerTestCase.super.setUp();
+                }
+                catch (Exception e) {
+                    ExceptionUtils.rethrow(e);
+                }
+            }
+        });
+    }
+
+    @Override
+    protected final void tearDown() throws Exception {
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    PositionManagerTestCase.super.tearDown();
+                }
+                catch (Exception e) {
+                    ExceptionUtils.rethrow(e);
+                }
+            }
+        });
+    }
+
+    @Override
+    protected void runBareRunnable(Runnable runnable) {
+        runnable.run();
+    }
+
+    protected void doTest() {
+        File file = new File(getTestDataPath(), getTestName(true) + ".kt");
+        String fileContent;
+        try {
+            fileContent = FileUtil.loadFile(file);
+        }
+        catch (IOException e) {
+            throw ExceptionUtils.rethrow(e);
+        }
+        final PsiFile psiFile = JetTestUtils.createFile(file.getAbsolutePath(), fileContent, getProject());
+
+        final Map<Integer, String> breakpoints = extractBreakpointsInfo(fileContent);
+
+        Map<String, ReferenceType> referencesByName = compileFileGetReferenceMap((JetFile) psiFile);
+
+        final DebugProcess debugProcess = createDebugProcess(referencesByName);
+
+        ApplicationManager.getApplication().runReadAction(new Runnable() {
+            public void run() {
+                try {
+                    PositionManager positionManager = getPositionManagerFactory().createPositionManager(debugProcess);
+                    assertNotNull(positionManager);
+                    for (Integer lineNumber : breakpoints.keySet()) {
+                        String className = breakpoints.get(lineNumber);
+                        SourcePosition position = SourcePosition.createFromLine(psiFile, lineNumber);
+                        assertPositionIsValid(position, className, positionManager);
+                    }
+                }
+                catch (NoDataException e) {
+                    ExceptionUtils.rethrow(e);
+                }
+            }
+        });
+    }
+
+    private static Map<Integer, String> extractBreakpointsInfo(String fileContent) {
+        Map<Integer, String> breakpoints = Maps.newHashMap();
+        String[] lines = StringUtil.convertLineSeparators(fileContent).split("\n");
+
+        for (int i = 0; i < lines.length; i++) {
+            Matcher matcher = breakpointPattern.matcher(lines[i]);
+            if (matcher.matches()) {
+                // Line breakpoint numbers are 1-based
+                breakpoints.put(i + 1, matcher.group(1));
+            }
+        }
+
+        return breakpoints;
+    }
+
+    private static Map<String, ReferenceType> compileFileGetReferenceMap(JetFile jetFile) {
+        ClassFileFactory classFileFactory = GenerationUtils.compileFileGetClassFileFactoryForTest(jetFile);
+
+        Map<String, ReferenceType> referencesByName = Maps.newHashMap();
+        for (String classFileName : classFileFactory.files()) {
+            String name = classFileName.substring(0, classFileName.lastIndexOf('.'));
+            referencesByName.put(name, new MockReferenceType(name));
+        }
+        return referencesByName;
+    }
+
+    private DebugProcessEvents createDebugProcess(final Map<String, ReferenceType> referencesByName) {
+        DebugProcessEvents events = new DebugProcessEvents(getProject()) {
+            private VirtualMachineProxyImpl virtualMachineProxy;
+
+            @Override
+            public VirtualMachineProxyImpl getVirtualMachineProxy() {
+                if (virtualMachineProxy == null) {
+                    virtualMachineProxy = new MockVirtualMachineProxy(this, referencesByName);
+                }
+                return virtualMachineProxy;
+            }
+        };
+
+        return events;
+    }
+
+    private static void assertPositionIsValid(SourcePosition position, String className, PositionManager positionManager) throws NoDataException {
+        List<ReferenceType> classes = positionManager.getAllClasses(position);
+        assertNotNull(classes);
+        assertEquals(1, classes.size());
+        ReferenceType type = classes.get(0);
+        assertEquals(className, type.name());
+    }
+
+    private static class MockVirtualMachineProxy extends VirtualMachineProxyImpl {
+        private final Map<String, ReferenceType> referencesByName;
+
+        private MockVirtualMachineProxy(DebugProcessEvents debugProcess, Map<String, ReferenceType> referencesByName) {
+            super(debugProcess, new MockVirtualMachine());
+            this.referencesByName = referencesByName;
+        }
+
+        @Override
+        public List<ReferenceType> allClasses() {
+            return new ArrayList<ReferenceType>(referencesByName.values());
+        }
+
+        @Override
+        public List<ReferenceType> classesByName(String name) {
+            ReferenceType ref = referencesByName.get(name);
+            if (ref == null) {
+                return Collections.emptyList();
+            }
+            else {
+                return Collections.singletonList(ref);
+            }
+        }
+    }
+}