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Edit File: debug-function-scopes.js

// Copyright 2012 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Flags: --expose-debug-as debug

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

function CheckScope(scope_mirror, scope_expectations, expected_scope_type) {
  assertEquals(expected_scope_type, scope_mirror.scopeType());

var scope_object = scope_mirror.scopeObject().value();

for (var name in scope_expectations) {
    var actual = scope_object[name];
    var expected = scope_expectations[name];
    assertEquals(expected, actual);
  }
}

// A copy of the scope types from mirror-debugger.js.
var ScopeType = { Global: 0,
                  Local: 1,
                  With: 2,
                  Closure: 3,
                  Catch: 4,
                  Block: 5 };

var mirror = Debug.MakeMirror(f1);

assertEquals(5, mirror.scopeCount());

CheckScope(mirror.scope(0), { a: 4, b: 5 }, ScopeType.Closure);
CheckScope(mirror.scope(1), { w: 5, v: "Capybara" }, ScopeType.With);
CheckScope(mirror.scope(2), { y: 17, z: 22 }, ScopeType.Closure);
CheckScope(mirror.scope(3), { x: 5 }, ScopeType.Closure);
CheckScope(mirror.scope(4), {}, ScopeType.Global);

var f2 = function() { return 5; }

var mirror = Debug.MakeMirror(f2);

assertEquals(1, mirror.scopeCount());

CheckScope(mirror.scope(0), {}, ScopeType.Global);

var mirror = Debug.MakeMirror(f3);

assertEquals(3, mirror.scopeCount());

CheckScope(mirror.scope(0), { visible2: 20 }, ScopeType.Closure);
CheckScope(mirror.scope(1), { visible1: 10 }, ScopeType.Closure);
CheckScope(mirror.scope(2), {}, ScopeType.Global);

var mirror = Debug.MakeMirror(f4);

assertEquals(3, mirror.scopeCount());

CheckScope(mirror.scope(0), { e2: "I'm error 2" }, ScopeType.Catch);
CheckScope(mirror.scope(1), { e1: "I'm error 1" }, ScopeType.Catch);
CheckScope(mirror.scope(2), {}, ScopeType.Global);

var mirror = Debug.MakeMirror(f5);

assertEquals(3, mirror.scopeCount());

CheckScope(mirror.scope(0), { p4: 20, p6: 22 }, ScopeType.Closure);
CheckScope(mirror.scope(1), { p1: 1 }, ScopeType.Closure);
CheckScope(mirror.scope(2), {}, ScopeType.Global);

function CheckNoScopeVisible(f) {
  var mirror = Debug.MakeMirror(f);
  assertEquals(0, mirror.scopeCount());
}

CheckNoScopeVisible(Number);

CheckNoScopeVisible(Function.toString);

// This getter is known to be implemented as closure.
CheckNoScopeVisible(new Error().__lookupGetter__("stack"));

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