text: // Copyright 2016 the V8 project authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  // MODULE
  
  
  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;
  
  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;
    }
  }
  
  Debug.setListener(listener);
  
  
  function BeginTest(name) {
    test_name = name;
    listener_delegate = null;
    listener_called = false;
    exception = null;
    begin_test_count++;
  }
  
  function EndTest() {
    assertTrue(listener_called, "listener not called for " + test_name);
    assertNull(exception, test_name + " / " + exception);
    end_test_count++;
  }
  
  
  // Check that two scope are the same.
  function assertScopeMirrorEquals(scope1, scope2) {
    assertEquals(scope1.scopeType(), scope2.scopeType());
    assertEquals(scope1.frameIndex(), scope2.frameIndex());
    assertEquals(scope1.scopeIndex(), scope2.scopeIndex());
    assertPropertiesEqual(scope1.scopeObject().value(),
                          scope2.scopeObject().value());
  }
  
  function CheckFastAllScopes(scopes, exec_state)
  {
    var fast_all_scopes = exec_state.frame().allScopes(true);
    var length = fast_all_scopes.length;
    assertTrue(scopes.length >= length);
    for (var i = 0; i < scopes.length && i < length; i++) {
      var scope = fast_all_scopes[length - i - 1];
      assertEquals(scopes[scopes.length - i - 1], scope.scopeType());
    }
  }
  
  
  // Check that the scope chain contains the expected types of scopes.
  function CheckScopeChain(scopes, exec_state) {
    var all_scopes = exec_state.frame().allScopes();
    assertEquals(scopes.length, exec_state.frame().scopeCount());
    assertEquals(scopes.length, all_scopes.length, "FrameMirror.allScopes length");
    for (var i = 0; i < scopes.length; i++) {
      var scope = exec_state.frame().scope(i);
      assertEquals(scopes[i], scope.scopeType());
      assertScopeMirrorEquals(all_scopes[i], scope);
    }
    CheckFastAllScopes(scopes, exec_state);
  }
  
  
  function CheckScopeDoesNotHave(properties, number, exec_state) {
    var scope = exec_state.frame().scope(number);
    for (var p of properties) {
      var property_mirror = scope.scopeObject().property(p);
      assertTrue(property_mirror.isUndefined(),
                 'property ' + p + ' found in scope');
    }
  }
  
  
  // Check that the scope contains at least minimum_content. For functions just
  // check that there is a function.
  function CheckScopeContent(minimum_content, number, exec_state) {
    var scope = exec_state.frame().scope(number);
    var minimum_count = 0;
    for (var p in minimum_content) {
      var property_mirror = scope.scopeObject().property(p);
      assertFalse(property_mirror.isUndefined(),
                  'property ' + p + ' not found in scope');
      assertEquals(minimum_content[p], property_mirror.value().value(),
                   'property ' + p + ' has unexpected value');
      minimum_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--;
    }
    // Ditto for 'this'.
    if (!scope.scopeObject().property('this').isUndefined()) {
      scope_size--;
    }
    // Temporary variables introduced by the parser have not been materialized.
    assertTrue(scope.scopeObject().property('').isUndefined());
  
    if (scope_size < minimum_count) {
      print('Names found in scope:');
      var names = scope.scopeObject().propertyNames();
      for (var i = 0; i < names.length; i++) {
        print(names[i]);
      }
    }
    assertTrue(scope_size >= minimum_count);
  }
  
  
  ////////////////////////////////////////////////////////////////////////////////
  // Actual tests.
  ////////////////////////////////////////////////////////////////////////////////
  
  
  BeginTest();
  listener_delegate = function(exec_state) {
    CheckScopeChain([debug.ScopeType.Module,
                     debug.ScopeType.Script,
                     debug.ScopeType.Global], exec_state);
    CheckScopeContent(
        {exported_var: undefined, imported_var: undefined},
        0, exec_state);
    CheckScopeDoesNotHave(
        ["doesntexist", "exported_let", "imported_let"],
        0, exec_state);
  };
  debugger;
  EndTest();
  
  let local_let = 1;
  var local_var = 2;
  export let exported_let = 3;
  export var exported_var = 4;
  import {exported_let as imported_let} from "modules-debug-scopes2.js";
  import {exported_var as imported_var} from "modules-debug-scopes2.js";
  
  BeginTest();
  listener_delegate = function(exec_state) {
    CheckScopeChain([debug.ScopeType.Module,
                     debug.ScopeType.Script,
                     debug.ScopeType.Global], exec_state);
    CheckScopeContent(
        {exported_let: 3, exported_var: 4,
         imported_let: 3, imported_var: 4}, 0, exec_state);
    CheckScopeDoesNotHave([], 0, exec_state);
  };
  debugger;
  EndTest();
  
  local_let += 10;
  local_var += 10;
  exported_let += 10;
  exported_var += 10;
  
  BeginTest();
  listener_delegate = function(exec_state) {
    CheckScopeChain([debug.ScopeType.Module,
                     debug.ScopeType.Script,
                     debug.ScopeType.Global], exec_state);
    CheckScopeContent(
        {exported_let: 13, exported_var: 14,
         imported_let: 13, imported_var: 14}, 0, exec_state);
    CheckScopeDoesNotHave([], 0, exec_state);
  };
  debugger;
  EndTest();
  