envChain_object-executeInGlobalWithBindings-empty.js

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// Verify the environment chain for Debugger.Object described in

// js/src/vm/EnvironmentObject.h.

// Passing empty bindings shouldn't create WithEnvironmentObject.

const g = newGlobal({newCompartment: true});

const dbg = new Debugger();

const gw = dbg.addDebuggee(g);

const bindings = {};

const envs = JSON.parse(gw.executeInGlobalWithBindings(`

var qualified = 10;

unqualified = 20;

let lexical = 30;

this.prop = 40;

const envs = [];

let env = getInnerMostEnvironmentObject();

while (env) {

  envs.push({

    type: getEnvironmentObjectType(env) || "*global*",

    qualified: !!Object.getOwnPropertyDescriptor(env, "qualified"),

    unqualified: !!Object.getOwnPropertyDescriptor(env, "unqualified"),

    lexical: !!Object.getOwnPropertyDescriptor(env, "lexical"),

    prop: !!Object.getOwnPropertyDescriptor(env, "prop"),

});

  env = getEnclosingEnvironmentObject(env);

JSON.stringify(envs);

`, bindings).return);

assertEq(envs.length, 2,

         "WithEnvironmentObject shouldn't be created if there's no binding");

let i = 0, env;

env = envs[i]; i++;

assertEq(env.type, "GlobalLexicalEnvironmentObject");

assertEq(env.qualified, false);

assertEq(env.unqualified, false);

assertEq(env.lexical, true, "lexical must live in the GlobalLexicalEnvironmentObject");

assertEq(env.prop, false);

env = envs[i]; i++;

assertEq(env.type, "*global*");

assertEq(env.qualified, true, "qualified var must live in the global");

assertEq(env.unqualified, true, "unqualified name must live in the global");

assertEq(env.lexical, false);

assertEq(env.prop, true, "this property must live in the global");