tests/org.eclipse.dltk.javascript.core.tests/src/org/eclipse/dltk/javascript/core/tests/typeinference/TypeInferenceTests.java

/*******************************************************************************
 * Copyright (c) 2010 xored software, Inc.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     xored software, Inc. - initial API and Implementation (Alex Panchenko)
 *******************************************************************************/
package org.eclipse.dltk.javascript.core.tests.typeinference;

import static org.eclipse.dltk.javascript.typeinfo.RModelBuilder.createParameter;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Set;

import junit.framework.TestCase;

import org.eclipse.dltk.compiler.env.ModuleSource;
import org.eclipse.dltk.compiler.problem.ProblemCollector;
import org.eclipse.dltk.core.tests.TestSupport;
import org.eclipse.dltk.core.tests.util.StringList;
import org.eclipse.dltk.internal.javascript.ti.IReferenceAttributes;
import org.eclipse.dltk.internal.javascript.ti.TypeInferencer2;
import org.eclipse.dltk.internal.javascript.validation.JavaScriptValidations;
import org.eclipse.dltk.javascript.ast.Script;
import org.eclipse.dltk.javascript.core.Types;
import org.eclipse.dltk.javascript.parser.JavaScriptParser;
import org.eclipse.dltk.javascript.typeinference.IValueCollection;
import org.eclipse.dltk.javascript.typeinference.IValueReference;
import org.eclipse.dltk.javascript.typeinference.ReferenceLocation;
import org.eclipse.dltk.javascript.typeinference.ValueReferenceUtil;
import org.eclipse.dltk.javascript.typeinfo.IRClassType;
import org.eclipse.dltk.javascript.typeinfo.IRFunctionType;
import org.eclipse.dltk.javascript.typeinfo.IRMember;
import org.eclipse.dltk.javascript.typeinfo.IRMethod;
import org.eclipse.dltk.javascript.typeinfo.IRRecordType;
import org.eclipse.dltk.javascript.typeinfo.IRSimpleType;
import org.eclipse.dltk.javascript.typeinfo.IRType;
import org.eclipse.dltk.javascript.typeinfo.ITypeNames;
import org.eclipse.dltk.javascript.typeinfo.ITypeSystem;
import org.eclipse.dltk.javascript.typeinfo.JSTypeSet;
import org.eclipse.dltk.javascript.typeinfo.RTypes;
import org.eclipse.dltk.javascript.typeinfo.model.Member;
import org.eclipse.dltk.javascript.typeinfo.model.ParameterKind;
import org.eclipse.dltk.javascript.typeinfo.model.Type;
import org.eclipse.dltk.javascript.typeinfo.model.TypeInfoModelLoader;

@SuppressWarnings({ "nls", "restriction" })
public class TypeInferenceTests extends TestCase implements ITypeNames {

	private static Script parse(String code) {
		final JavaScriptParser parser = new JavaScriptParser();
		final ProblemCollector reporter = new ProblemCollector();
		final Script script = parser.parse(new ModuleSource(code), reporter);
		if (reporter.hasErrors()) {
			fail(reporter.getErrors().toString());
		}
		return script;
	}

	private static final String STATIC_PREFIX = "static:";

	private JSTypeSet getTypes(String... names) {
		final JSTypeSet types = JSTypeSet.create();
		for (String name : names) {
			final boolean isStatic = name.startsWith(STATIC_PREFIX);
			final Type type = TypeInfoModelLoader.getInstance().getType(
					isStatic ? name.substring(STATIC_PREFIX.length()) : name);
			assertNotNull(type);
			types.add(isStatic ? RTypes.classType(ts(), type) : RTypes.simple(
					ts(), type));
		}
		return types;
	}

	private TypeInferencer2 inferencer;

	private IValueCollection inference(final String code) {
		inferencer = new TestTypeInferencer2();
		// return inferencer.doInferencing(parse(code));
		inferencer.doInferencing(parse(code));
		return inferencer.getCollection();
	}

	private ITypeSystem ts() {
		return inferencer;
	}

	public void testNewNamedFunction() throws Exception {
		List<String> lines = new StringList();
		lines.add("var test = new function Test() {");
		lines.add("this.p = 10;");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference a = collection.getChild("test");
		assertEquals(1, a.getTypes().size());
		assertEquals("Test", a.getTypes().iterator().next().getName());
		assertEquals(1, a.getDirectChildren().size());
		assertEquals("p", a.getDirectChildren().iterator().next());
	}

	public void testNewFunction() throws Exception {
		List<String> lines = new StringList();
		lines.add("var test = new function() {");
		lines.add("this.p = 10;");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference a = collection.getChild("test");
		assertEquals(1, a.getTypes().size());
		assertEquals(ITypeNames.OBJECT, a.getTypes().iterator().next()
				.getName());
		assertEquals(1, a.getDirectChildren().size());
		assertEquals("p", a.getDirectChildren().iterator().next());
	}

	public void testNewType() throws Exception {
		List<String> lines = new StringList();
		lines.add("function Test() {");
		lines.add("this.p = 10;");
		lines.add("}");
		lines.add("var test = new Test();");
		IValueCollection collection = inference(lines.toString());
		IValueReference a = collection.getChild("test");
		assertEquals(1, a.getTypes().size());
		assertEquals("Test", a.getTypes().iterator().next().getName());
		assertEquals(1, a.getDirectChildren().size());
		assertEquals("p", a.getDirectChildren().iterator().next());
	}

	public void testNestedFunctionType() throws Exception {
		List<String> lines = new StringList();
		lines.add("function Test() {");
		lines.add("  /** @type Node */");
		lines.add("  this.newNode = function newNode() {");
		lines.add("    return new Node();");
		lines.add("  }");
		lines.add("  function Node(){");
		lines.add("    this.a = 10;");
		lines.add("    /** @type String */");
		lines.add("    this.toString = function toString() {");
		lines.add("      return 'Node';");
		lines.add("    }");
		lines.add("  }");
		lines.add("}");
		lines.add("var test = new Test();");
		IValueCollection collection = inference(lines.toString());
		IValueReference test = collection.getChild("test");
		assertEquals(true, test.exists());
		assertEquals(1, test.getDirectChildren().size());
		assertEquals(1, test.getTypes().size());
		assertEquals("Test", test.getTypes().iterator().next().getName());

		assertEquals("newNode", test.getDirectChildren().iterator().next());

		test = test.getChild("newNode");
		assertEquals(true, test.exists());
		assertEquals(1, test.getTypes().size());
		assertEquals("Function", typename(test.getTypes()));

		test = test.getChild(IValueReference.FUNCTION_OP);
		assertEquals(2, test.getDirectChildren().size());
		assertNotNull(test.getDeclaredType());
		assertEquals("Node", test.getDeclaredType().getName());

		IValueReference a = test.getChild("a");
		assertEquals(true, a.exists());
		assertEquals(1, a.getTypes().size());
		assertEquals("Number", typename(a.getTypes()));

		IValueReference toString = test.getChild("toString");
		assertEquals(true, toString.exists());
		assertEquals(1, toString.getTypes().size());
		assertEquals(FUNCTION, typename(toString.getTypes()));

		toString = toString.getChild(IValueReference.FUNCTION_OP);
		assertEquals(true, toString.exists());
		assertEquals(1, toString.getTypes().size());
		assertEquals("String", typename(toString.getTypes()));
	}

	protected String typename(JSTypeSet types) {
		assertEquals(1, types.size());
		return types.toRType().getName();
	}

	public void testNestedFunctionTypeWithoutDeclaration() throws Exception {
		List<String> lines = new StringList();
		lines.add("function Test() {");
		lines.add("  this.newNode = function newNode() {");
		lines.add("    return new Node();");
		lines.add("  }");
		lines.add("  function Node(){");
		lines.add("    this.a = 10;");
		lines.add("    this.toString = function toString() {");
		lines.add("      return 'Node';");
		lines.add("    }");
		lines.add("  }");
		lines.add("}");
		lines.add("var test = new Test();");
		IValueCollection collection = inference(lines.toString());
		IValueReference test = collection.getChild("test");
		assertEquals(true, test.exists());
		assertEquals(1, test.getDirectChildren().size());
		assertEquals(1, test.getTypes().size());
		assertEquals("Test", test.getTypes().iterator().next().getName());

		assertEquals("newNode", test.getDirectChildren().iterator().next());

		test = test.getChild("newNode");
		assertEquals(true, test.exists());
		assertEquals(1, test.getTypes().size());
		assertEquals("Function", typename(test.getTypes()));

		test = test.getChild(IValueReference.FUNCTION_OP);
		assertEquals(2, test.getDirectChildren().size());
		assertNotNull(test.getDeclaredType());
		assertEquals("Node", test.getDeclaredType().getName());

		IValueReference a = test.getChild("a");
		assertEquals(true, a.exists());
		assertEquals(1, a.getTypes().size());
		assertEquals("Number", a.getTypes().iterator().next().getName());

		IValueReference toString = test.getChild("toString");
		assertEquals(true, toString.exists());
		assertEquals(1, toString.getTypes().size());
		assertEquals("Function", typename(toString.getTypes()));

		toString = toString.getChild(IValueReference.FUNCTION_OP);
		assertEquals(true, toString.exists());
		assertEquals(1, toString.getTypes().size());
		assertEquals("String", typename(toString.getTypes()));
	}

	public void testNestedFunctionTypeWithScopeReturn() throws Exception {
		List<String> lines = new StringList();
		lines.add("function Test() {");
		lines.add("this.newScope = function() {");
		lines.add("return  {");
		lines.add("x:10,");
		lines.add("y:'10',");
		lines.add("z:function(){return 'test';}");
		lines.add("}");
		lines.add("}");
		lines.add("}");
		lines.add("var test = new Test();");
		IValueCollection collection = inference(lines.toString());
		IValueReference test = collection.getChild("test");
		assertEquals(true, test.exists());
		assertEquals(1, test.getDirectChildren().size());
		assertEquals(1, test.getTypes().size());
		assertEquals("Test", test.getTypes().iterator().next().getName());

		assertEquals("newScope", test.getDirectChildren().iterator().next());

		test = test.getChild("newScope");
		assertEquals(true, test.exists());
		assertEquals(1, test.getTypes().size());
		assertEquals("Function", test.getTypes().iterator().next().getName());

		test = test.getChild(IValueReference.FUNCTION_OP);
		final IRRecordType testType = (IRRecordType) JavaScriptValidations
				.typeOf(test);
		assertEquals(3, testType.getMembers().size());
		assertNull(test.getDeclaredType());

		IValueReference x = test.getChild("x");
		assertEquals(true, x.exists());
		assertEquals(1, x.getDeclaredTypes().size());
		assertEquals(0, x.getTypes().size());
		assertEquals(RTypes.NUMBER, x.getDeclaredType());

		IValueReference y = test.getChild("y");
		assertEquals(true, y.exists());
		assertEquals(1, y.getDeclaredTypes().size());
		assertEquals(0, y.getTypes().size());
		assertEquals(RTypes.STRING, y.getDeclaredType());

		IValueReference z = test.getChild("z");
		assertEquals(true, z.exists());
		assertEquals(1, z.getDeclaredTypes().size());
		assertEquals(0, z.getTypes().size());
		assertTrue(z.getDeclaredType() instanceof IRFunctionType);

		IValueReference zResult = z.getChild(IValueReference.FUNCTION_OP);
		assertEquals(true, zResult.exists());
		assertEquals(1, zResult.getTypes().size());
		assertEquals("String", zResult.getTypes().iterator().next().getName());

	}

	public void testNumberVar() {
		IValueCollection collection = inference("var a = 1");
		IValueReference a = collection.getChild("a");
		assertEquals(getTypes(NUMBER), a.getTypes());
	}

	public void testStringVar() {
		IValueCollection collection = inference("var a = \"Hello\"");
		IValueReference a = collection.getChild("a");
		assertEquals(getTypes(STRING), a.getTypes());
	}

	public void testBooleanVar() {
		IValueCollection collection = inference("var a = false");
		IValueReference a = collection.getChild("a");
		assertEquals(getTypes(BOOLEAN), a.getTypes());
	}

	public void testXmlVar() {
		IValueCollection collection = inference("var a = <hello/>");
		IValueReference a = collection.getChild("a");
		assertEquals(getTypes(XML), a.getTypes());
	}

	public void testXmlVarHidesType() {
		IValueCollection collection = inference("var XML = 1");
		IValueReference xml = collection.getChild("XML");
		assertEquals(getTypes(NUMBER), xml.getTypes());
	}

	public void testConditionalOperator() {
		IValueCollection collection = inference("var a = isActive ? 1 : 0");
		IValueReference a = collection.getChild("a");
		assertEquals(getTypes(NUMBER), a.getTypes());
	}

	public void testReturnNumber() {
		List<String> lines = new StringList();
		lines.add("var s = 1");
		lines.add("s.execute = function() {");
		lines.add("  return 1");
		lines.add("}");
		lines.add("var z = s.execute()");
		IValueCollection collection = inference(lines.toString());
		IValueReference z = collection.getChild("z");
		assertEquals(getTypes(NUMBER), z.getTypes());
	}

	public void testReturnObjectProperties() {
		List<String> lines = new StringList();
		lines.add("var s = 1");
		lines.add("s.execute = function() {");
		lines.add("  return { a: 1, b: true }");
		lines.add("}");
		lines.add("var z = s.execute()");
		IValueCollection collection = inference(lines.toString());
		IValueReference z = collection.getChild("z");
		assertTrue(z.getTypes().toRType() instanceof IRRecordType);
		final IValueReference a = z.getChild("a");
		assertTrue(a.exists());
		assertEquals(getTypes(NUMBER), a.getDeclaredTypes());
		final IValueReference b = z.getChild("b");
		assertTrue(b.exists());
		assertEquals(getTypes(BOOLEAN), b.getDeclaredTypes());
	}

	public void testInlineFunctionStatementCall() {
		List<String> lines = new StringList();
		lines.add("var str = (function() {");
		lines.add("  return 'Hello'");
		lines.add("})()");
		IValueCollection collection = inference(lines.toString());
		IValueReference str = collection.getChild("str");
		assertEquals(getTypes(STRING), str.getTypes());
	}

	public void testToStringMethod() {
		List<String> lines = new StringList();
		lines.add("var num = 1");
		lines.add("var str = num.toString()");
		IValueCollection collection = inference(lines.toString());
		IValueReference str = collection.getChild("str");
		assertEquals(getTypes(STRING), str.getTypes());
	}

	public void testStringLengthProperty() {
		List<String> lines = new StringList();
		lines.add("var str = 'STRING'");
		lines.add("var len = str.length");
		IValueCollection collection = inference(lines.toString());
		IValueReference len = collection.getChild("len");
		assertEquals(getTypes(NUMBER), len.getTypes());
	}

	public void testFunctionCall() {
		List<String> lines = new StringList();
		lines.add("function hello() {");
		lines.add("  return 'Hello'");
		lines.add("}");
		lines.add("var str = hello()");
		IValueCollection collection = inference(lines.toString());
		IValueReference str = collection.getChild("str");
		assertEquals(getTypes(STRING), str.getTypes());
	}

	public void testIf() {
		List<String> lines = new StringList();
		lines.add("if (1 == 2) {");
		lines.add("  x = 1");
		lines.add("}");
		lines.add("else {");
		lines.add("  x = 'No'");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference x = collection.getChild("x");
		assertEquals(getTypes(STRING, NUMBER), x.getTypes());
	}

	public void testIf2() {
		List<String> lines = new StringList();
		lines.add("if (1 == 2) {");
		lines.add("  x = 1");
		lines.add("}");
		lines.add("else {");
		lines.add("  y = 'No'");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		assertEquals(getTypes(NUMBER), collection.getChild("x").getTypes());
		assertEquals(getTypes(STRING), collection.getChild("y").getTypes());
	}

	public void testFor() {
		List<String> lines = new StringList();
		lines.add("for (var i = 0; i < 10; ++i) {");
		lines.add("  x = 'No'");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference i = collection.getChild("i");
		assertEquals(getTypes(NUMBER), i.getTypes());
		IValueReference x = collection.getChild("x");
		assertEquals(getTypes(STRING), x.getTypes());
	}

	public void testForIn() {
		List<String> lines = new StringList();
		lines.add("for (var i in objectWithIterator) {");
		lines.add("  print(objectWithIterator[i])");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference i = collection.getChild("i");
		assertEquals(getTypes(STRING), i.getTypes());
	}

	public void testWhile() {
		List<String> lines = new StringList();
		lines.add("while (1 == 2) {");
		lines.add("  x = 'No'");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference x = collection.getChild("x");
		assertEquals(getTypes(STRING), x.getTypes());
	}

	public void testUnknownVar() {
		List<String> lines = new StringList();
		lines.add("var x = y");
		IValueCollection collection = inference(lines.toString());
		IValueReference x = collection.getChild("x");
		assertEquals(getTypes(), x.getTypes());
		assertFalse(collection.hasChild("y"));
	}

	public void testUnknownProperty() {
		List<String> lines = new StringList();
		lines.add("var x = {a:1}");
		lines.add("var y = x.b");
		IValueCollection collection = inference(lines.toString());
		IValueReference x = collection.getChild("x");
		final IRRecordType xType = (IRRecordType) x.getTypes().toRType();
		assertEquals(Collections.singleton("a"), RTypes.memberNames(xType));
		IValueReference y = collection.getChild("y");
		assertEquals(getTypes(), y.getTypes());
	}

	public void testUnknownProperty3() {
		List<String> lines = new StringList();
		lines.add("x.y.z = 1");
		IValueCollection collection = inference(lines.toString());
		IValueReference x = collection.getChild("x");
		IValueReference y = x.getChild("y");
		IValueReference z = y.getChild("z");
		assertEquals(getTypes(NUMBER), z.getTypes());
	}

	public void testSwitch() {
		List<String> lines = new StringList();
		lines.add("switch(n) {");
		lines.add("case 0: str = 'Zero'; break;");
		lines.add("case 1: str = 'One'; break;");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference x = collection.getChild("str");
		assertEquals(getTypes(STRING), x.getTypes());
	}

	public void testWith() {
		if (TestSupport.notYetImplemented(this))
			return;
		List<String> lines = new StringList();
		lines.add("var a = {name:1}");
		lines.add("with (a) {");
		lines.add("  name = 'Alex'");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference a = collection.getChild("a");
		assertTrue(a.getTypes().toRType() instanceof IRRecordType);
		IValueReference name = a.getChild("name");
		assertTrue(name.getTypes().containsAll(getTypes(STRING)));
	}

	public void testNew() {
		List<String> lines = new StringList();
		lines.add("var str = new String()");
		lines.add("var num = new Number()");
		lines.add("var bool = new Boolean()");
		lines.add("var arr = new Array()");
		IValueCollection collection = inference(lines.toString());
		IValueReference str = collection.getChild("str");
		assertEquals(getTypes(STRING), str.getTypes());
		IValueReference num = collection.getChild("num");
		assertEquals(getTypes(NUMBER), num.getTypes());
		IValueReference bool = collection.getChild("bool");
		assertEquals(getTypes(BOOLEAN), bool.getTypes());
		IValueReference arr = collection.getChild("arr");
		assertEquals(JSTypeSet.singleton(RTypes.arrayOf(ts(), RTypes.any())),
				arr.getTypes());
	}

	public void testRecursion1() {
		List<String> lines = new StringList();
		lines.add("context = { 'index': 1, 'prev': context }");
		lines.add("doSomethind()");
		lines.add("context = context['prev']");
		IValueCollection collection = inference(lines.toString());
		IValueReference context = collection.getChild("context");
		IValueReference index = context.getChild("index");
		assertTrue(index.exists());
		IValueReference prev = context.getChild("prev");
		assertTrue(prev.exists());
		// (alex) not sure what is expected here
	}

	public void testRecursion2() {
		List<String> lines = new StringList();
		lines.add("var a = function() { return 1 }");
		lines.add("a.operation2 = a");
		IValueCollection collection = inference(lines.toString());
		IValueReference a = collection.getChild("a");
		assertTrue(a.exists());
	}

	public void testRecursion3() {
		List<String> lines = new StringList();
		lines.add("var a = function() { return 1 }");
		lines.add("a.operation2 = a");
		lines.add("var z = a.operation2()");
		IValueCollection collection = inference(lines.toString());
		IValueReference z = collection.getChild("z");
		assertEquals(getTypes(NUMBER), z.getTypes());
	}

	public void testExampleTypeProvider1() {
		List<String> lines = new StringList();
		lines.add("/** @type ExampleService */");
		lines.add("var a");
		lines.add("var status = a.execute().status");
		IValueCollection collection = inference(lines.toString());
		IValueReference status = collection.getChild("status");
		assertEquals(getTypes(NUMBER), status.getTypes());
	}

	public void testExampleTypeProvider2() {
		List<String> lines = new StringList();
		lines.add("/** @type ExampleService */");
		lines.add("var a");
		lines.add("var name = a.execute().service.name");
		IValueCollection collection = inference(lines.toString());
		IValueReference name = collection.getChild("name");
		assertEquals(getTypes(STRING), name.getTypes());
	}

	public void testExampleTypeProvider3() {
		List<String> lines = new StringList();
		lines.add("/** @type ExampleService2 */");
		lines.add("var a");
		lines.add("var name = a.execute().service.name");
		IValueCollection collection = inference(lines.toString());
		IValueReference name = collection.getChild("name");
		assertTrue(name.exists());
		assertTrue(name.getTypes().isEmpty());
	}

	public void testExampleTypeWithCollection() {
		List<String> lines = new StringList();
		lines.add("/** @type ExampleService2 */");
		lines.add("var a;");
		lines.add("/** @type " + ExampleTypeProvider.TYPE_WITH_COLLECTION
				+ " */");
		lines.add("var b = a.execute();");
		IValueCollection collection = inference(lines.toString());
		IValueReference name = collection.getChild("b");
		assertTrue(name.exists());
		assertEquals(ExampleTypeProvider.TYPE_WITH_COLLECTION, name
				.getDeclaredType().getName());
		Set<String> directChildren = name.getDirectChildren();
		assertEquals(1, directChildren.size());

		assertTrue(name.getChild("service").exists());
		assertTrue(name.getChild("test").exists());
	}

	public void testExampleTypeWithCollectionInArray() {
		List<String> lines = new StringList();
		lines.add("/** @type Array<" + ExampleTypeProvider.TYPE_WITH_COLLECTION
				+ ">" + " */");
		lines.add("var b = new Array()");
		IValueCollection collection = inference(lines.toString());
		IValueReference name = collection.getChild("b");
		assertTrue(name.exists());
		assertEquals("Array<" + ExampleTypeProvider.TYPE_WITH_COLLECTION + ">",
				name.getDeclaredType().getName());
		IValueReference array = name.getChild("[]");
		assertTrue(array.getChild("service").exists());
		assertTrue(array.getChild("test").exists());
	}

	public void testGenericArrayTypeMethod() {
		List<String> lines = new StringList();
		lines.add("/** @type " + ExampleTypeProvider.TYPE_GENERIC_ARRAY_METHOD
				+ " */");
		lines.add("var a");
		lines.add("var name = a.execute();");
		lines.add("var name2 = a.execute()[0];");
		IValueCollection collection = inference(lines.toString());

		IValueReference name = collection.getChild("name");
		assertTrue(name.exists());
		assertEquals(1, name.getTypes().size());
		assertEquals(JSTypeSet.singleton(RTypes.arrayOf(ts(), RTypes.STRING)),
				name.getTypes());

		IValueReference name2 = collection.getChild("name2");
		assertTrue(name2.exists());
		assertEquals(1, name2.getTypes().size());
		assertEquals("String", typename(name2.getTypes()));
	}

	public void testGenericArrayResolverMethod() {
		List<String> lines = new StringList();
		lines.add("var name = myGenericArrayTest.execute()[0];");
		IValueCollection collection = inference(lines.toString());

		IValueReference name = collection.getChild("name");
		assertTrue(name.exists());
		assertEquals(1, name.getTypes().size());
		assertEquals("String", name.getTypes().iterator().next().getName());

	}

	public void testGenericArrayResolverProperty() {
		List<String> lines = new StringList();
		lines.add("var name = myGenericArrayTest.genericArrayProperty[0];");
		IValueCollection collection = inference(lines.toString());

		IValueReference name = collection.getChild("name");
		assertTrue(name.exists());
		assertEquals(getTypes(ITypeNames.STRING), name.getTypes());

	}

	public void testExampleElementResolver1() {
		List<String> lines = new StringList();
		lines.add("var name = ExampleGlobal.execute().service.name");
		IValueCollection collection = inference(lines.toString());
		IValueReference name = collection.getChild("name");
		assertEquals(getTypes(STRING), name.getTypes());
	}

	public void testExampleElementResolver2() {
		List<String> lines = new StringList();
		lines.add("var name = executeExampleGlobal().service.name");
		IValueCollection collection = inference(lines.toString());
		IValueReference name = collection.getChild("name");
		assertEquals(getTypes(STRING), name.getTypes());
	}

	public void testSelfReferenceAssignment() throws Exception {
		List<String> lines = new StringList();
		lines.add("var str = '10';");
		lines.add("str = str.big();");
		IValueCollection collection = inference(lines.toString());
		IValueReference name = collection.getChild("str");
		assertEquals(getTypes(STRING), name.getTypes());
	}

	public void testStaticTypeAssignment() throws Exception {
		List<String> lines = new StringList();
		lines.add("var num = Number;");
		IValueCollection collection = inference(lines.toString());
		IValueReference name = collection.getChild("num");
		assertEquals(getTypes(STATIC_PREFIX + NUMBER), name.getTypes());

		assertEquals(NUMBER, ((IRClassType) name.getTypes().toRType())
				.getTarget().getName());

		// TODO should a static reference getchild really return existing none
		// static childs?
		// assertEquals(true, name.getChild("prototype").exists());
		// assertEquals(false, name.getChild("toFixed").exists());

	}

	public void testAssignToResolvedProperty() {
		List<String> lines = new StringList();
		lines.add("ExampleGlobal.abcdef = 1");
		inference(lines.toString());
	}

	public void testJavaClzIntegrationWithPackagesPrefix() {
		List<String> lines = new StringList();
		lines.add("var str = Packages.java.lang.String;");
		lines.add("var x = new str()");
		IValueCollection collection = inference(lines.toString());
		IValueReference strClz = collection.getChild("str");
		assertEquals(1, strClz.getTypes().size());
		IRType type = strClz.getTypes().toRType();
		assertEquals("Class<java.lang.String>", type.getName());
		final Type stringType = ((IRClassType) type).getTarget();

		final Member valueOf = stringType.findDirectMember("valueOf");
		assertNotNull(valueOf);
		assertEquals(true, valueOf.isStatic());

		IValueReference str = collection.getChild("x");
		assertEquals(1, str.getTypes().size());
		assertEquals(stringType,
				((IRSimpleType) str.getTypes().toRType()).getTarget());

		final Member toString = stringType.findDirectMember("toString");
		assertNotNull(toString);
		assertEquals(false, toString.isStatic());
	}

	public void testJavaClzIntegrationWithJavaPrefix() {
		List<String> lines = new StringList();
		lines.add("var str = java.lang.String;");
		lines.add("var x = new str()");
		IValueCollection collection = inference(lines.toString());
		IValueReference strClz = collection.getChild("str");
		assertEquals(1, strClz.getTypes().size());
		IRType type = strClz.getTypes().toRType();
		assertEquals("Class<java.lang.String>", type.getName());
		final Type stringType = ((IRClassType) type).getTarget();

		final Member valueOf = stringType.findDirectMember("valueOf");
		assertNotNull(valueOf);
		assertEquals(true, valueOf.isStatic());

		IValueReference str = collection.getChild("x");
		assertEquals(1, str.getTypes().size());
		assertEquals(stringType,
				((IRSimpleType) str.getTypes().toRType()).getTarget());

		final Member toString = stringType.findDirectMember("toString");
		assertNotNull(toString);
		assertEquals(false, toString.isStatic());
	}

	public void testJavaIntegrationWithJavaPrefix() {
		List<String> lines = new StringList();
		lines.add("var str = new java.lang.String()");
		IValueCollection collection = inference(lines.toString());
		IValueReference strClz = collection.getChild("str");
		assertEquals(1, strClz.getTypes().size());
		IRType type = strClz.getTypes().iterator().next();
		assertEquals("java.lang.String", type.getName());

		boolean toStringFound = false;
		for (Member member : ((IRSimpleType) type).getTarget().getMembers()) {
			toStringFound = member.getName().equals("toString");
			if (toStringFound) {
				assertEquals(false, member.isStatic());
				break;
			}

		}

		assertEquals(true, toStringFound);
	}

	public void testJavaIntegrationWithPackagesPrefix() {
		List<String> lines = new StringList();
		lines.add("var str = new Packages.java.lang.String()");
		IValueCollection collection = inference(lines.toString());
		IValueReference strClz = collection.getChild("str");
		assertEquals(1, strClz.getTypes().size());
		IRType type = strClz.getTypes().iterator().next();
		assertEquals("java.lang.String", type.getName());

		boolean toStringFound = false;
		for (Member member : ((IRSimpleType) type).getTarget().getMembers()) {
			toStringFound = member.getName().equals("toString");
			if (toStringFound) {
				assertEquals(false, member.isStatic());
				break;
			}
		}

		assertEquals(true, toStringFound);
	}

	public void testJSDocParamWithDefaultProperties() throws Exception {
		List<String> lines = new StringList();
		lines.add("/**");
		lines.add(" * @param node a nice node");
		lines.add(" * @param node.name the name of the node");
		lines.add(" * @param node.value the value of the node");
		lines.add(" */");
		lines.add("function addChild(node) {");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference addChild = collection.getChild("addChild");
		assertEquals(1, addChild.getDirectChildren().size());
		assertEquals(IValueReference.FUNCTION_OP, addChild.getDirectChildren()
				.iterator().next());

		IValueCollection functionCollection = (IValueCollection) addChild
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		assertNotNull(functionCollection);

		IValueReference node = functionCollection.getChild("node");
		assertEquals(0, node.getDirectChildren().size());

		assertNotNull(node.getDeclaredType());
		final IRRecordType declaredType = (IRRecordType) node.getDeclaredType();

		assertEquals(2, declaredType.getMembers().size());

		assertNotNull(declaredType.getMember("name"));
		assertNotNull(declaredType.getMember("value"));

	}

	public void testJSDocTypeTagFunction() throws Exception {
		List<String> lines = new StringList();
		lines.add("/**");
		lines.add(" * @type String");
		lines.add(" */");
		lines.add("function getChild() {");
		lines.add("}");
		lines.add("function test() {");
		lines.add("var x = getChild();");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference test = collection.getChild("test");
		IValueCollection functionScope = (IValueCollection) test
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		IValueReference x = functionScope.getChild("x");
		assertEquals(1, x.getTypes().size());
		assertEquals("String", x.getTypes().iterator().next().getName());
	}

	public void testJSDocReturnsTagFunction() throws Exception {
		List<String> lines = new StringList();
		lines.add("/**");
		lines.add(" * @returns {String} a nice string");
		lines.add(" */");
		lines.add("function getChild() {");
		lines.add("}");
		lines.add("function test() {");
		lines.add("var x = getChild();");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference test = collection.getChild("test");
		IValueCollection functionScope = (IValueCollection) test
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		IValueReference x = functionScope.getChild("x");
		assertEquals(1, x.getTypes().size());
		assertEquals("String", x.getTypes().iterator().next().getName());
	}

	public void testJSDocReturnsTagLazyFunction() throws Exception {
		List<String> lines = new StringList();
		lines.add("function test() {");
		lines.add("var x = getChild();");
		lines.add("}");
		lines.add("/**");
		lines.add(" * @returns {String} a nice string");
		lines.add(" */");
		lines.add("function getChild() {");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference test = collection.getChild("test");
		IValueCollection functionScope = (IValueCollection) test
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		IValueReference x = functionScope.getChild("x");
		assertEquals(1, x.getTypes().size());
		assertEquals("String", x.getTypes().iterator().next().getName());
	}

	public void testJSDocTypeTagVariable() throws Exception {
		List<String> lines = new StringList();
		lines.add("/**");
		lines.add(" * @type String");
		lines.add(" */");
		lines.add("var str;");
		lines.add("function test() {");
		lines.add("var x = str;");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference test = collection.getChild("test");
		IValueCollection functionScope = (IValueCollection) test
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		IValueReference x = functionScope.getChild("x");
		assertNotNull(x.getDeclaredType());
		assertEquals("String", x.getDeclaredType().getName());
	}

	public void testJSDocTypeTagMultiVar1() throws Exception {
		List<String> lines = new StringList();
		lines.add("/** @type String */");
		lines.add("var var1,");
		lines.add("\t" + "/** @type Number */");
		lines.add("\t" + "var2");
		IValueCollection collection = inference(lines.toString());
		assertEquals("String", typename(collection.getChild("var1")
				.getDeclaredTypes()));
		assertEquals("Number", typename(collection.getChild("var2")
				.getDeclaredTypes()));
	}

	public void testJSDocTypeTagMultiVar2() throws Exception {
		List<String> lines = new StringList();
		lines.add("var");
		lines.add("\t" + "/** @type String */");
		lines.add("\t" + "var1,");
		lines.add("\t" + "/** @type Number */");
		lines.add("\t" + "var2");
		IValueCollection collection = inference(lines.toString());
		assertEquals("String", typename(collection.getChild("var1")
				.getDeclaredTypes()));
		assertEquals("Number", typename(collection.getChild("var2")
				.getDeclaredTypes()));
	}

	public void testOrAssignmentOf2VariablesOfSameType() throws Exception {
		List<String> lines = new StringList();
		lines.add("/**");
		lines.add(" * @param {String} a");
		lines.add(" * @param {String} b");
		lines.add(" */");
		lines.add("function test(a,b) {");
		lines.add("var x = a || b;");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference test = collection.getChild("test");
		IValueCollection functionScope = (IValueCollection) test
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		IValueReference x = functionScope.getChild("x");
		assertEquals(x.getTypes().toString(), 1, x.getTypes().size());
		assertTrue(x.getTypes().toString(),
				x.getTypes().equals(getTypes("String")));
	}

	public void testOrAssignmentOf2VariablesOfDifferentType() throws Exception {
		List<String> lines = new StringList();
		lines.add("/**");
		lines.add(" * @param {Number} a");
		lines.add(" * @param {String} b");
		lines.add(" */");
		lines.add("function test(a,b) {");
		lines.add("var x = a || b;");
		lines.add("}");
		IValueCollection collection = inference(lines.toString());
		IValueReference test = collection.getChild("test");
		IValueCollection functionScope = (IValueCollection) test
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		IValueReference x = functionScope.getChild("x");
		assertEquals(x.getTypes().toString(), 2, x.getTypes().size());
		assertTrue(x.getTypes().toString(),
				x.getTypes().equals(getTypes("Number", "String")));
	}

	public void testJSDocTypeTagVariableLazy() throws Exception {
		List<String> lines = new StringList();
		lines.add("function test() {");
		lines.add("var x = str;");
		lines.add("}");
		lines.add("/**");
		lines.add(" * @type String");
		lines.add(" */");
		lines.add("var str;");
		IValueCollection collection = inference(lines.toString());
		IValueReference test = collection.getChild("test");
		IValueCollection functionScope = (IValueCollection) test
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		IValueReference x = functionScope.getChild("x");
		assertNotNull(x.getDeclaredType());
		assertEquals("String", x.getDeclaredType().getName());
	}

	public void testCallExternalFunctionViaReferenceCopy() {
		StringList code = new StringList();
		code.add("var p = parseInt");
		code.add("var n = p('1')");
		IValueCollection collection = inference(code.toString());
		IValueReference n = collection.getChild("n");
		assertEquals(getTypes(ITypeNames.NUMBER), n.getTypes());
	}

	public void testMapWithOnlyValueDeclaration() {
		StringList code = new StringList();
		code.add("/** @param {Object<String>} param */");
		code.add("function test(param) {");
		code.add(" var x = param['test'];");
		code.add("}");
		IValueCollection collection = inference(code.toString());
		IValueReference function = collection.getChild("test");
		IValueCollection functionScope = (IValueCollection) function
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		IValueReference variable = functionScope.getChild("x");
		assertEquals(getTypes(ITypeNames.STRING), variable.getTypes());
	}

	public void testMapWithKeyValueDeclaration() {
		StringList code = new StringList();
		code.add("/** @param {Object<String,String>} param */");
		code.add("function test(param) {");
		code.add(" var x = param['test'];");
		code.add("}");
		IValueCollection collection = inference(code.toString());
		IValueReference function = collection.getChild("test");
		IValueCollection functionScope = (IValueCollection) function
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		IValueReference variable = functionScope.getChild("x");
		assertEquals(getTypes(ITypeNames.STRING), variable.getTypes());
	}

	public void testMapWithKeyValueDeclaration2() {
		StringList code = new StringList();
		code.add("/** @param {Object<String,Number>} param */");
		code.add("function test(param) {");
		code.add(" var x = param['test'];");
		code.add("}");
		IValueCollection collection = inference(code.toString());
		IValueReference function = collection.getChild("test");
		IValueCollection functionScope = (IValueCollection) function
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		IValueReference variable = functionScope.getChild("x");
		assertEquals(getTypes(ITypeNames.NUMBER), variable.getTypes());
	}

	public void testGenericArrayPop() throws Exception {
		StringList code = new StringList();
		code.add("/** @type {Array<String>} */");
		code.add("var x = [];");
		code.add("var y = x.pop();");
		IValueCollection collection = inference(code.toString());
		IValueReference child = collection.getChild("y");
		assertEquals(getTypes(ITypeNames.STRING), child.getTypes());
	}

	public void testJSDocWithArrayInArrayType() throws Exception {
		StringList code = new StringList();
		code.add("/** @type {String[][]} */");
		code.add("var x = null;");
		code.add("var y = x[0][0];");
		IValueCollection collection = inference(code.toString());
		IValueReference child = collection.getChild("y");
		assertEquals(getTypes(ITypeNames.STRING), child.getTypes());

	}

	public void testJSDocWithGenericArrayInArrayType() throws Exception {
		StringList code = new StringList();
		code.add("/** @type {Array<String>[]} */");
		code.add("var x = null;");
		code.add("var y = x[0][0];");
		IValueCollection collection = inference(code.toString());
		IValueReference child = collection.getChild("y");
		assertEquals(getTypes(ITypeNames.STRING), child.getTypes());

	}

	public void testArrayInitializerWithLiteralNumbers() {
		StringList code = new StringList();
		code.add("var x = [1,2,3];");
		IValueCollection collection = inference(code.toString());
		IValueReference child = collection.getChild("x");
		IRType type = JavaScriptValidations.typeOf(child);
		assertEquals(RTypes.arrayOf(ts(), RTypes.simple(ts(), Types.NUMBER)),
				type);
	}

	public void testArrayInitializerWithLiteralStrings() {
		StringList code = new StringList();
		code.add("var x = ['1','2','3'];");
		IValueCollection collection = inference(code.toString());
		IValueReference child = collection.getChild("x");
		IRType type = JavaScriptValidations.typeOf(child);
		assertEquals(RTypes.arrayOf(ts(), RTypes.simple(ts(), Types.STRING)),
				type);
	}

	public void testArrayInitializerWithLiteralMixed() {
		StringList code = new StringList();
		code.add("var x = ['1','2',3];");
		IValueCollection collection = inference(code.toString());
		IValueReference child = collection.getChild("x");
		IRType type = JavaScriptValidations.typeOf(child);
		assertEquals(RTypes.arrayOf(ts(), RTypes.union(Arrays.<IRType>asList(RTypes.STRING,RTypes.NUMBER))), type);
	}

	public void testArrayInitializerWithVariableNumbers() {
		StringList code = new StringList();
		code.add("var y = 1;");
		code.add("var x = [y,y,y];");
		IValueCollection collection = inference(code.toString());
		IValueReference child = collection.getChild("x");
		IRType type = JavaScriptValidations.typeOf(child);
		assertEquals(RTypes.arrayOf(ts(), RTypes.simple(ts(), Types.NUMBER)),
				type);
	}

	public void testArrayInitializerWithVariableAndLiteralNumbers() {
		StringList code = new StringList();
		code.add("var y = 1;");
		code.add("var x = [y,1,y];");
		IValueCollection collection = inference(code.toString());
		IValueReference child = collection.getChild("x");
		IRType type = JavaScriptValidations.typeOf(child);
		assertEquals(RTypes.arrayOf(ts(), RTypes.simple(ts(), Types.NUMBER)),
				type);
	}

	public void testArrayInitializerWithVariableStrings() {
		StringList code = new StringList();
		code.add("var y = '1';");
		code.add("var x = [y,y,y];");
		IValueCollection collection = inference(code.toString());
		IValueReference child = collection.getChild("x");
		IRType type = JavaScriptValidations.typeOf(child);
		assertEquals(RTypes.arrayOf(ts(), RTypes.simple(ts(), Types.STRING)),
				type);
	}

	public void testArrayInitializerWithVariableAndLiteralStrings() {
		StringList code = new StringList();
		code.add("var y = '1';");
		code.add("var x = [y,'2',y];");
		IValueCollection collection = inference(code.toString());
		IValueReference child = collection.getChild("x");
		IRType type = JavaScriptValidations.typeOf(child);
		assertEquals(RTypes.arrayOf(ts(), RTypes.simple(ts(), Types.STRING)),
				type);
	}

	public void testArrayInRecordTypeVariableLookup() {
		StringList code = new StringList();
		code.add("/** @type {{layout_id:String,panels:Array<{foundset:String, index:Number, selectedTab:Number, view:Number}>}} */");
		code.add("var vInfoObject = null;");
		code.add("var panel = vInfoObject.panels[0];");
		code.add("var fs =  panel.foundset;");
		IValueCollection collection = inference(code.toString());
		IValueReference child = collection.getChild("fs");
		IRType type = JavaScriptValidations.typeOf(child);
		assertEquals(RTypes.simple(ts(), Types.STRING), type);
	}

	public void testDeleteOperator() {
		List<String> lines = new StringList();
		lines.add("var point = {x:1, y:2}");
		lines.add("var result = delete point.x");
		IValueCollection collection = inference(lines.toString());
		IValueReference len = collection.getChild("result");
		assertEquals(getTypes(BOOLEAN), len.getTypes());
	}

	public void testDateAsFunction() {
		List<String> lines = new StringList();
		lines.add("var d = Date()");
		IValueCollection collection = inference(lines.toString());
		IValueReference len = collection.getChild("d");
		assertEquals(getTypes(STRING), len.getTypes());
	}

	public void testFunctionTypeMethodCaching() {
		final StringList code = new StringList();
		code.add("/** @type {function(Number,Number):Date} */");
		code.add("var f;");
		code.add("var fcall = f.call;");
		code.add("fcall({}, 1, 2);");
		code.add("");
		code.add("/** @type {function(Number,Number):Date} */");
		code.add("var g;");
		code.add("var gcall = g.call;");
		code.add("gcall({}, 3, 4);");
		final IValueCollection collection = inference(code.toString());
		final IRMethod fcall = ValueReferenceUtil.extractElement(
				collection.getChild("fcall"), IRMethod.class);
		assertNotNull(fcall);
		final IRMember gcall = ValueReferenceUtil.extractElement(
				collection.getChild("gcall"), IRMethod.class);
		assertNotNull(gcall);
		assertSame(fcall, fcall);
	}

	public void testStaticConstructors() {
		{
			final IValueCollection collection = inference("var s = String('text')");
			assertEquals(RTypes.STRING,
					JavaScriptValidations.typeOf(collection.getChild("s")));
		}
		{
			final IValueCollection collection = inference("var n = Number('1')");
			assertEquals(RTypes.NUMBER,
					JavaScriptValidations.typeOf(collection.getChild("n")));
		}
		{
			final IValueCollection collection = inference("var b = Boolean('true')");
			assertEquals(RTypes.BOOLEAN,
					JavaScriptValidations.typeOf(collection.getChild("b")));
		}
	}

	public void testObjectLiteral() {
		final StringList code = new StringList();
		code.add("var person = { name:'John', age: 18 }");
		final IValueCollection collection = inference(code.toString());
		final IRRecordType point = (IRRecordType) JavaScriptValidations
				.typeOf(collection.getChild("person"));
		assertEquals(RTypes.STRING, point.getMember("name").getType());
		assertEquals(RTypes.NUMBER, point.getMember("age").getType());
	}

	public void testObjectLiteralFunctionMember() {
		final StringList code = new StringList();
		code.add("/**");
		code.add(" * @param {Number} x");
		code.add(" * @param {Number} y");
		code.add(" */");
		code.add("function drawRect(x,y) {}");
		code.add("var figure = { draw: drawRect }");
		final IValueCollection collection = inference(code.toString());
		final IRRecordType figure = (IRRecordType) JavaScriptValidations
				.typeOf(collection.getChild("figure"));
		final IRFunctionType expected = RTypes.functionType(ts(), Arrays
				.asList(createParameter("x", RTypes.NUMBER,
						ParameterKind.NORMAL),
						createParameter("y", RTypes.NUMBER,
								ParameterKind.NORMAL)), null);
		assertEquals(expected, figure.getMember("draw").getType());
	}

	public void testObjectLiteralFunctionMemberTypeOverride() {
		final StringList code = new StringList();
		code.add("/**");
		code.add(" * @param {Number} x");
		code.add(" * @param {Number} y");
		code.add(" */");
		code.add("function drawRect(x,y) {}");
		code.add("var figure = { /** @type {String} */ draw: drawRect }");
		final IValueCollection collection = inference(code.toString());
		final IRRecordType figure = (IRRecordType) JavaScriptValidations
				.typeOf(collection.getChild("figure"));
		assertEquals(RTypes.STRING, figure.getMember("draw").getType());
	}

	public void testTryCatchDefaultVariableType() {
		final StringList code = new StringList();
		code.add("var o;");
		code.add("try {");
		code.add("}");
		code.add("catch (e) { o = e; }");
		final IValueCollection collection = inference(code.toString());
		final IRSimpleType o = (IRSimpleType) JavaScriptValidations
				.typeOf(collection.getChild("o"));
		assertEquals(ITypeNames.ERROR, o.getName());
	}

	public void testTryCatchVariableType() {
		final StringList code = new StringList();
		code.add("var o;");
		code.add("try {");
		code.add("  throw 1");
		code.add("}");
		code.add("catch (/** @type {Number} */ e) { o = e; }");
		final IValueCollection collection = inference(code.toString());
		final IRSimpleType o = (IRSimpleType) JavaScriptValidations
				.typeOf(collection.getChild("o"));
		assertEquals(ITypeNames.NUMBER, o.getName());
	}

	public void testMapTypeLookup() {
		final StringList code = new StringList();
		code.add("/**");
		code.add("* @type {Object<String>}");
		code.add("*/");
		code.add("var MapTypeIds = {");
		code.add("}");
		code.add("function test() {");
		code.add("	var x = MapTypeIds.test;");
		code.add("}");
		final IValueCollection collection = inference(code.toString());
		IValueReference test = collection.getChild("test");
		IValueCollection functionScope = (IValueCollection) test
				.getAttribute(IReferenceAttributes.FUNCTION_SCOPE);
		final IRSimpleType o = (IRSimpleType) JavaScriptValidations
				.typeOf(functionScope.getChild("x"));
		assertNotNull(o);
		assertEquals(ITypeNames.STRING, o.getName());
	}
	
	public void testBaseTypeWith2SubClasses() {
		final StringList code = new StringList();
		code.add("/** @constructor */");
		code.add("function base() {");
		code.add("	this.baseVar = 10;");
		code.add("	this.baseMethod = function(){};");
		code.add("}");
		code.add("/** @constructor ");
		code.add(" * @extends {base} */");
		code.add("function A1() {};");
		code.add("A1.prototype =  new base();");
		code.add("A1.prototype.constructor = A1;");
		code.add("A1.prototype.methodAddedToA1Prototype = function() {};");
		code.add("/** @constructor ");
		code.add(" * @extends {base} */");
		code.add("function A2() {};");
		code.add("A2.prototype =  new base();");
		code.add("A2.prototype.constructor = A2;");
		code.add("var x = new A2();");
		final IValueCollection collection = inference(code.toString());
		IValueReference test = collection.getChild("x");
		Set<String> directChildren = test.getDirectChildren();
		assertEquals(2, directChildren.size());
	}
	
	public void test2InstancesOfTheSameFunctionAddingAfieldTo1() {
		final StringList code = new StringList();
		code.add("function cust(){}");
		code.add("var x = new cust();");
		code.add("x.test = 10;");
		code.add("var y = new cust();");
		final IValueCollection collection = inference(code.toString());
		IValueReference test = collection.getChild("y");
		Set<String> directChildren = test.getDirectChildren();
		assertFalse(directChildren.contains("test"));
	}
	
	public void testReferenceToPropertyAssignedFunction() {
		final StringList code = new StringList();
		code.add("var p ={};");
		code.add("p.object.myfunc = function(){};");
		code.add("p.object.myfunc();");
		final IValueCollection collection = inference(code.toString());
		IValueReference func = collection.getChild("p").getChild("object").getChild("myfunc");
		assertTrue(func.exists());
		
		ReferenceLocation location = func.getLocation();
		assertEquals(20, location.getNameStart());
		assertEquals(26, location.getNameEnd());
	}
	
	public void testObjectCreateCallWithNull() {
		final StringList code = new StringList();
		code.add("var p = Object.create(null)");
		final IValueCollection collection = inference(code.toString());
		IValueReference func = collection.getChild("p").getChild("hasOwnProperty");
		assertTrue(func.exists());
		
	}

}