test/mjsunit/harmony/debug-blockscopes.js - platform/external/v8 - Git at Google

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 // Flags: --expose-debug-as debug --harmony-scoping
 // The functions used for testing backtraces. They are at the top to make the
 // testing of source line/column easier.

 // TODO(ES6): properly activate extended mode
 "use strict";

 // Get the Debug object exposed from the debug context global object.
 var Debug = debug.Debug;

 var test_name;
 var listener_delegate;
 var listener_called;
 var exception;
 var begin_test_count = 0;
 var end_test_count = 0;
 var break_count = 0;


 // Debug event listener which delegates.
 function listener(event, exec_state, event_data, data) {
   try {
     if (event == Debug.DebugEvent.Break) {
       break_count++;
       listener_called = true;
       listener_delegate(exec_state);
     }
   } catch (e) {
     exception = e;
   }
 }

 // Add the debug event listener.
 Debug.setListener(listener);


 // Initialize for a new test.
 function BeginTest(name) {
   test_name = name;
   listener_delegate = null;
   listener_called = false;
   exception = null;
   begin_test_count++;
 }


 // Check result of a test.
 function EndTest() {
   assertTrue(listener_called, "listerner not called for " + test_name);
   assertNull(exception, test_name);
   end_test_count++;
 }

 var global_object = this;

 // Check that the scope chain contains the expected types of scopes.
 function CheckScopeChain(scopes, exec_state) {
   assertEquals(scopes.length, exec_state.frame().scopeCount());
   for (var i = 0; i < scopes.length; i++) {
     var scope = exec_state.frame().scope(i);
     assertTrue(scope.isScope());
     assertEquals(scopes[i], scope.scopeType());

     // Check the global object when hitting the global scope.
     if (scopes[i] == debug.ScopeType.Global) {
       // Objects don't have same class (one is "global", other is "Object",
       // so just check the properties directly.
       assertPropertiesEqual(global_object, scope.scopeObject().value());
     }
   }

   // Get the debug command processor.
   var dcp = exec_state.debugCommandProcessor("unspecified_running_state");

   // Send a scopes request and check the result.
   var json;
   var request_json = '{"seq":0,"type":"request","command":"scopes"}';
   var response_json = dcp.processDebugJSONRequest(request_json);
   var response = JSON.parse(response_json);
   assertEquals(scopes.length, response.body.scopes.length);
   for (var i = 0; i < scopes.length; i++) {
     assertEquals(i, response.body.scopes[i].index);
     assertEquals(scopes[i], response.body.scopes[i].type);
     if (scopes[i] == debug.ScopeType.Local ||
         scopes[i] == debug.ScopeType.Closure) {
       assertTrue(response.body.scopes[i].object.ref < 0);
     } else {
       assertTrue(response.body.scopes[i].object.ref >= 0);
     }
     var found = false;
     for (var j = 0; j < response.refs.length && !found; j++) {
       found = response.refs[j].handle == response.body.scopes[i].object.ref;
     }
     assertTrue(found, "Scope object " + response.body.scopes[i].object.ref + " not found");
   }
 }

 // Check that the content of the scope is as expected. For functions just check
 // that there is a function.
 function CheckScopeContent(content, number, exec_state) {
   var scope = exec_state.frame().scope(number);
   var count = 0;
   for (var p in content) {
     var property_mirror = scope.scopeObject().property(p);
     if (property_mirror.isUndefined()) {
       print('property ' + p + ' not found in scope');
     }
     assertFalse(property_mirror.isUndefined(), 'property ' + p + ' not found in scope');
     if (typeof(content[p]) === 'function') {
       assertTrue(property_mirror.value().isFunction());
     } else {
       assertEquals(content[p], property_mirror.value().value(), 'property ' + p + ' has unexpected value');
     }
     count++;
   }

   // 'arguments' and might be exposed in the local and closure scope. Just
   // ignore this.
   var scope_size = scope.scopeObject().properties().length;
   if (!scope.scopeObject().property('arguments').isUndefined()) {
     scope_size--;
   }
   // Also ignore synthetic variable from catch block.
   if (!scope.scopeObject().property('.catch-var').isUndefined()) {
     scope_size--;
   }
   // Skip property with empty name.
   if (!scope.scopeObject().property('').isUndefined()) {
     scope_size--;
   }
   // Also ignore synthetic variable from block scopes.
   if (!scope.scopeObject().property('.block').isUndefined()) {
     scope_size--;
   }

   if (count != scope_size) {
     print('Names found in scope:');
     var names = scope.scopeObject().propertyNames();
     for (var i = 0; i < names.length; i++) {
       print(names[i]);
     }
   }
   assertEquals(count, scope_size);

   // Get the debug command processor.
   var dcp = exec_state.debugCommandProcessor("unspecified_running_state");

   // Send a scope request for information on a single scope and check the
   // result.
   var request_json = '{"seq":0,"type":"request","command":"scope","arguments":{"number":';
   request_json += scope.scopeIndex();
   request_json += '}}';
   var response_json = dcp.processDebugJSONRequest(request_json);
   var response = JSON.parse(response_json);
   assertEquals(scope.scopeType(), response.body.type);
   assertEquals(number, response.body.index);
   if (scope.scopeType() == debug.ScopeType.Local ||
       scope.scopeType() == debug.ScopeType.Closure) {
     assertTrue(response.body.object.ref < 0);
   } else {
     assertTrue(response.body.object.ref >= 0);
   }
   var found = false;
   for (var i = 0; i < response.refs.length && !found; i++) {
     found = response.refs[i].handle == response.body.object.ref;
   }
   assertTrue(found, "Scope object " + response.body.object.ref + " not found");
 }


 // Simple empty block scope in local scope.
 BeginTest("Local block 1");

 function local_block_1() {
   {
     debugger;
   }
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({}, 0, exec_state);
 };
 local_block_1();
 EndTest();


 // Simple empty block scope in local scope with a parameter.
 BeginTest("Local 2");

 function local_2(a) {
   {
     debugger;
   }
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({a:1}, 0, exec_state);
 };
 local_2(1);
 EndTest();


 // Local scope with a parameter and a local variable.
 BeginTest("Local 3");

 function local_3(a) {
   let x = 3;
   debugger;
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({a:1,x:3}, 0, exec_state);
 };
 local_3(1);
 EndTest();


 // Local scope with parameters and local variables.
 BeginTest("Local 4");

 function local_4(a, b) {
   let x = 3;
   let y = 4;
   debugger;
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({a:1,b:2,x:3,y:4}, 0, exec_state);
 };
 local_4(1, 2);
 EndTest();


 // Single variable in a block scope.
 BeginTest("Local 5");

 function local_5(a) {
   {
     let x = 5;
     debugger;
   }
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Block,
                    debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({x:5}, 0, exec_state);
   CheckScopeContent({a:1}, 1, exec_state);
 };
 local_5(1);
 EndTest();


 // Two variables in a block scope.
 BeginTest("Local 6");

 function local_6(a) {
   {
     let x = 6;
     let y = 7;
     debugger;
   }
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Block,
                    debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({x:6,y:7}, 0, exec_state);
   CheckScopeContent({a:1}, 1, exec_state);
 };
 local_6(1);
 EndTest();


 // Two variables in a block scope.
 BeginTest("Local 7");

 function local_7(a) {
   {
     {
       let x = 8;
       debugger;
     }
   }
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Block,
                    debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({x:8}, 0, exec_state);
   CheckScopeContent({a:1}, 1, exec_state);
 };
 local_7(1);
 EndTest();


 // Simple closure formed by returning an inner function referering to an outer
 // block local variable and an outer function's parameter.
 BeginTest("Closure 1");

 function closure_1(a) {
   var x = 2;
   let y = 3;
   if (true) {
     let z = 4;
     function f() {
       debugger;
       return a + x + y + z;
     };
     return f;
   }
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Local,
                    debug.ScopeType.Block,
                    debug.ScopeType.Closure,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({}, 0, exec_state);
   CheckScopeContent({a:1,x:2,y:3}, 2, exec_state);
 };
 closure_1(1)();
 EndTest();


 // Simple for-in loop over the keys of an object.
 BeginTest("For loop 1");

 function for_loop_1() {
   for (let x in {y:undefined}) {
     debugger;
   }
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Block,
                    debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({x:'y'}, 0, exec_state);
   // The function scope contains a temporary iteration variable.
   CheckScopeContent({x:'y'}, 1, exec_state);
 };
 for_loop_1();
 EndTest();


 // For-in loop over the keys of an object with a block scoped let variable
 // shadowing the iteration variable.
 BeginTest("For loop 2");

 function for_loop_2() {
   for (let x in {y:undefined}) {
     let x = 3;
     debugger;
   }
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Block,
                    debug.ScopeType.Block,
                    debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({x:3}, 0, exec_state);
   CheckScopeContent({x:'y'}, 1, exec_state);
   // The function scope contains a temporary iteration variable.
   CheckScopeContent({x:'y'}, 2, exec_state);
 };
 for_loop_2();
 EndTest();


 // Simple for loop.
 BeginTest("For loop 3");

 function for_loop_3() {
   for (let x = 3; x < 4; ++x) {
     debugger;
   }
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Block,
                    debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({x:3}, 0, exec_state);
   CheckScopeContent({}, 1, exec_state);
 };
 for_loop_3();
 EndTest();


 // For loop with a block scoped let variable shadowing the iteration variable.
 BeginTest("For loop 4");

 function for_loop_4() {
   for (let x = 3; x < 4; ++x) {
     let x = 5;
     debugger;
   }
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Block,
                    debug.ScopeType.Block,
                    debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({x:5}, 0, exec_state);
   CheckScopeContent({x:3}, 1, exec_state);
   CheckScopeContent({}, 2, exec_state);
 };
 for_loop_4();
 EndTest();


 // For loop with two variable declarations.
 BeginTest("For loop 5");

 function for_loop_5() {
   for (let x = 3, y = 5; x < 4; ++x) {
     debugger;
   }
 }

 listener_delegate = function(exec_state) {
   CheckScopeChain([debug.ScopeType.Block,
                    debug.ScopeType.Local,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({x:3,y:5}, 0, exec_state);
   CheckScopeContent({}, 1, exec_state);
 };
 for_loop_5();
 EndTest();
	// Copyright 2011 the V8 project authors. All rights reserved.
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are
	// met:
	//
	// * Redistributions of source code must retain the above copyright
	// notice, this list of conditions and the following disclaimer.
	// * Redistributions in binary form must reproduce the above
	// copyright notice, this list of conditions and the following
	// disclaimer in the documentation and/or other materials provided
	// with the distribution.
	// * Neither the name of Google Inc. nor the names of its
	// contributors may be used to endorse or promote products derived
	// from this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	// Flags: --expose-debug-as debug --harmony-scoping
	// The functions used for testing backtraces. They are at the top to make the
	// testing of source line/column easier.

	// TODO(ES6): properly activate extended mode
	"use strict";

	// Get the Debug object exposed from the debug context global object.
	var Debug = debug.Debug;

	var test_name;
	var listener_delegate;
	var listener_called;
	var exception;
	var begin_test_count = 0;
	var end_test_count = 0;
	var break_count = 0;


	// Debug event listener which delegates.
	function listener(event, exec_state, event_data, data) {
	try {
	if (event == Debug.DebugEvent.Break) {
	break_count++;
	listener_called = true;
	listener_delegate(exec_state);
	}
	} catch (e) {
	exception = e;
	}
	}

	// Add the debug event listener.
	Debug.setListener(listener);


	// Initialize for a new test.
	function BeginTest(name) {
	test_name = name;
	listener_delegate = null;
	listener_called = false;
	exception = null;
	begin_test_count++;
	}


	// Check result of a test.
	function EndTest() {
	assertTrue(listener_called, "listerner not called for " + test_name);
	assertNull(exception, test_name);
	end_test_count++;
	}

	var global_object = this;

	// Check that the scope chain contains the expected types of scopes.
	function CheckScopeChain(scopes, exec_state) {
	assertEquals(scopes.length, exec_state.frame().scopeCount());
	for (var i = 0; i < scopes.length; i++) {
	var scope = exec_state.frame().scope(i);
	assertTrue(scope.isScope());
	assertEquals(scopes[i], scope.scopeType());

	// Check the global object when hitting the global scope.
	if (scopes[i] == debug.ScopeType.Global) {
	// Objects don't have same class (one is "global", other is "Object",
	// so just check the properties directly.
	assertPropertiesEqual(global_object, scope.scopeObject().value());
	}
	}

	// Get the debug command processor.
	var dcp = exec_state.debugCommandProcessor("unspecified_running_state");

	// Send a scopes request and check the result.
	var json;
	var request_json = '{"seq":0,"type":"request","command":"scopes"}';
	var response_json = dcp.processDebugJSONRequest(request_json);
	var response = JSON.parse(response_json);
	assertEquals(scopes.length, response.body.scopes.length);
	for (var i = 0; i < scopes.length; i++) {
	assertEquals(i, response.body.scopes[i].index);
	assertEquals(scopes[i], response.body.scopes[i].type);
	if (scopes[i] == debug.ScopeType.Local \|\|
	scopes[i] == debug.ScopeType.Closure) {
	assertTrue(response.body.scopes[i].object.ref < 0);
	} else {
	assertTrue(response.body.scopes[i].object.ref >= 0);
	}
	var found = false;
	for (var j = 0; j < response.refs.length && !found; j++) {
	found = response.refs[j].handle == response.body.scopes[i].object.ref;
	}
	assertTrue(found, "Scope object " + response.body.scopes[i].object.ref + " not found");
	}
	}

	// Check that the content of the scope is as expected. For functions just check
	// that there is a function.
	function CheckScopeContent(content, number, exec_state) {
	var scope = exec_state.frame().scope(number);
	var count = 0;
	for (var p in content) {
	var property_mirror = scope.scopeObject().property(p);
	if (property_mirror.isUndefined()) {
	print('property ' + p + ' not found in scope');
	}
	assertFalse(property_mirror.isUndefined(), 'property ' + p + ' not found in scope');
	if (typeof(content[p]) === 'function') {
	assertTrue(property_mirror.value().isFunction());
	} else {
	assertEquals(content[p], property_mirror.value().value(), 'property ' + p + ' has unexpected value');
	}
	count++;
	}

	// 'arguments' and might be exposed in the local and closure scope. Just
	// ignore this.
	var scope_size = scope.scopeObject().properties().length;
	if (!scope.scopeObject().property('arguments').isUndefined()) {
	scope_size--;
	}
	// Also ignore synthetic variable from catch block.
	if (!scope.scopeObject().property('.catch-var').isUndefined()) {
	scope_size--;
	}
	// Skip property with empty name.
	if (!scope.scopeObject().property('').isUndefined()) {
	scope_size--;
	}
	// Also ignore synthetic variable from block scopes.
	if (!scope.scopeObject().property('.block').isUndefined()) {
	scope_size--;
	}

	if (count != scope_size) {
	print('Names found in scope:');
	var names = scope.scopeObject().propertyNames();
	for (var i = 0; i < names.length; i++) {
	print(names[i]);
	}
	}
	assertEquals(count, scope_size);

	// Get the debug command processor.
	var dcp = exec_state.debugCommandProcessor("unspecified_running_state");

	// Send a scope request for information on a single scope and check the
	// result.
	var request_json = '{"seq":0,"type":"request","command":"scope","arguments":{"number":';
	request_json += scope.scopeIndex();
	request_json += '}}';
	var response_json = dcp.processDebugJSONRequest(request_json);
	var response = JSON.parse(response_json);
	assertEquals(scope.scopeType(), response.body.type);
	assertEquals(number, response.body.index);
	if (scope.scopeType() == debug.ScopeType.Local \|\|
	scope.scopeType() == debug.ScopeType.Closure) {
	assertTrue(response.body.object.ref < 0);
	} else {
	assertTrue(response.body.object.ref >= 0);
	}
	var found = false;
	for (var i = 0; i < response.refs.length && !found; i++) {
	found = response.refs[i].handle == response.body.object.ref;
	}
	assertTrue(found, "Scope object " + response.body.object.ref + " not found");
	}


	// Simple empty block scope in local scope.
	BeginTest("Local block 1");

	function local_block_1() {
	{
	debugger;
	}
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({}, 0, exec_state);
	};
	local_block_1();
	EndTest();


	// Simple empty block scope in local scope with a parameter.
	BeginTest("Local 2");

	function local_2(a) {
	{
	debugger;
	}
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({a:1}, 0, exec_state);
	};
	local_2(1);
	EndTest();


	// Local scope with a parameter and a local variable.
	BeginTest("Local 3");

	function local_3(a) {
	let x = 3;
	debugger;
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({a:1,x:3}, 0, exec_state);
	};
	local_3(1);
	EndTest();


	// Local scope with parameters and local variables.
	BeginTest("Local 4");

	function local_4(a, b) {
	let x = 3;
	let y = 4;
	debugger;
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({a:1,b:2,x:3,y:4}, 0, exec_state);
	};
	local_4(1, 2);
	EndTest();


	// Single variable in a block scope.
	BeginTest("Local 5");

	function local_5(a) {
	{
	let x = 5;
	debugger;
	}
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Block,
	debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({x:5}, 0, exec_state);
	CheckScopeContent({a:1}, 1, exec_state);
	};
	local_5(1);
	EndTest();


	// Two variables in a block scope.
	BeginTest("Local 6");

	function local_6(a) {
	{
	let x = 6;
	let y = 7;
	debugger;
	}
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Block,
	debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({x:6,y:7}, 0, exec_state);
	CheckScopeContent({a:1}, 1, exec_state);
	};
	local_6(1);
	EndTest();


	// Two variables in a block scope.
	BeginTest("Local 7");

	function local_7(a) {
	{
	{
	let x = 8;
	debugger;
	}
	}
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Block,
	debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({x:8}, 0, exec_state);
	CheckScopeContent({a:1}, 1, exec_state);
	};
	local_7(1);
	EndTest();


	// Simple closure formed by returning an inner function referering to an outer
	// block local variable and an outer function's parameter.
	BeginTest("Closure 1");

	function closure_1(a) {
	var x = 2;
	let y = 3;
	if (true) {
	let z = 4;
	function f() {
	debugger;
	return a + x + y + z;
	};
	return f;
	}
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Local,
	debug.ScopeType.Block,
	debug.ScopeType.Closure,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({}, 0, exec_state);
	CheckScopeContent({a:1,x:2,y:3}, 2, exec_state);
	};
	closure_1(1)();
	EndTest();


	// Simple for-in loop over the keys of an object.
	BeginTest("For loop 1");

	function for_loop_1() {
	for (let x in {y:undefined}) {
	debugger;
	}
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Block,
	debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({x:'y'}, 0, exec_state);
	// The function scope contains a temporary iteration variable.
	CheckScopeContent({x:'y'}, 1, exec_state);
	};
	for_loop_1();
	EndTest();


	// For-in loop over the keys of an object with a block scoped let variable
	// shadowing the iteration variable.
	BeginTest("For loop 2");

	function for_loop_2() {
	for (let x in {y:undefined}) {
	let x = 3;
	debugger;
	}
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Block,
	debug.ScopeType.Block,
	debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({x:3}, 0, exec_state);
	CheckScopeContent({x:'y'}, 1, exec_state);
	// The function scope contains a temporary iteration variable.
	CheckScopeContent({x:'y'}, 2, exec_state);
	};
	for_loop_2();
	EndTest();


	// Simple for loop.
	BeginTest("For loop 3");

	function for_loop_3() {
	for (let x = 3; x < 4; ++x) {
	debugger;
	}
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Block,
	debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({x:3}, 0, exec_state);
	CheckScopeContent({}, 1, exec_state);
	};
	for_loop_3();
	EndTest();


	// For loop with a block scoped let variable shadowing the iteration variable.
	BeginTest("For loop 4");

	function for_loop_4() {
	for (let x = 3; x < 4; ++x) {
	let x = 5;
	debugger;
	}
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Block,
	debug.ScopeType.Block,
	debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({x:5}, 0, exec_state);
	CheckScopeContent({x:3}, 1, exec_state);
	CheckScopeContent({}, 2, exec_state);
	};
	for_loop_4();
	EndTest();


	// For loop with two variable declarations.
	BeginTest("For loop 5");

	function for_loop_5() {
	for (let x = 3, y = 5; x < 4; ++x) {
	debugger;
	}
	}

	listener_delegate = function(exec_state) {
	CheckScopeChain([debug.ScopeType.Block,
	debug.ScopeType.Local,
	debug.ScopeType.Global], exec_state);
	CheckScopeContent({x:3,y:5}, 0, exec_state);
	CheckScopeContent({}, 1, exec_state);
	};
	for_loop_5();
	EndTest();