envChain_object-executeInGlobalWithBindings-existing-bindings.js

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

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

// WithEnvironmentObject shouldn't contain bindings conflicts with existing

// globals.

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

const dbg = new Debugger();

const gw = dbg.addDebuggee(g);

const bindings = {

  bindings_prop: 50,

  bindings_prop_var: 61,

  bindings_prop_lexical: 71,

  bindings_prop_unqualified: 81,

};

gw.executeInGlobal(`

var bindings_prop_var = 60;

let bindings_prop_lexical = 70;

bindings_prop_unqualified = 80;

`);

const {envs, vars} = JSON.parse(gw.executeInGlobalWithBindings(`

const vars = {

  bindings_prop,

  bindings_prop_var,

  bindings_prop_lexical,

  bindings_prop_unqualified,

};

const envs = [];

let env = getInnerMostEnvironmentObject();

while (env) {

  envs.push({

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

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

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

    bindings_prop_var_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_var")?.value,

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

    bindings_prop_lexical_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_lexical")?.value,

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

    bindings_prop_unqualified_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_unqualified")?.value,

});

  env = getEnclosingEnvironmentObject(env);

JSON.stringify({envs, vars});

`, bindings).return);

assertEq(vars.bindings_prop, 50,

         "qualified var should read the value set by the declaration");

assertEq(vars.bindings_prop_var, 60,

         "qualified var should read the value set by the declaration");

assertEq(vars.bindings_prop_lexical, 70,

         "lexical should read the value set by the declaration");

assertEq(vars.bindings_prop_unqualified, 80,

         "unqualified name should read the value set by the assignment");

assertEq(bindings.bindings_prop_var, 61,

         "the original bindings property must not be overwritten for var");

assertEq(bindings.bindings_prop_lexical, 71,

         "the original bindings property must not be overwritten for lexical");

assertEq(bindings.bindings_prop_unqualified, 81,

         "the original bindings property must not be overwritten for unqualified");

assertEq(envs.length, 3);

let i = 0, env;

env = envs[i]; i++;

assertEq(env.type, "WithEnvironmentObject");

assertEq(env.bindings_prop, true, "bindings property must live in the with env for bindings");

assertEq(env.bindings_prop_var, false,

         "bindings property must not live in the with env for bindings if it conflicts with existing global");

assertEq(env.bindings_prop_lexical, false,

         "bindings property must not live in the with env for bindings if it conflicts with existing global");

assertEq(env.bindings_prop_unqualified, false,

         "bindings property must not live in the with env for bindings if it conflicts with existing global");

assertEq(env.bindings_prop_unqualified, false,

         "bindings property must not live in the with env for bindings if it conflicts with existing global");

env = envs[i]; i++;

assertEq(env.type, "GlobalLexicalEnvironmentObject");

assertEq(env.bindings_prop, false);

assertEq(env.bindings_prop_var, false);

assertEq(env.bindings_prop_lexical, true);

assertEq(env.bindings_prop_lexical_value, 70);

assertEq(env.bindings_prop_unqualified, false);

env = envs[i]; i++;

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

assertEq(env.bindings_prop, false);

assertEq(env.bindings_prop_var, true);

assertEq(env.bindings_prop_var_value, 60);

assertEq(env.bindings_prop_lexical, false);

assertEq(env.bindings_prop_unqualified, true);

assertEq(env.bindings_prop_unqualified_value, 80);