ambiguous-star-export.js

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// Test ambigious export * statements.

"use strict";

load(libdir + "asserts.js");

function checkModuleEval(source) {

    let m = parseModule(source);

    moduleLink(m);

    moduleEvaluate(m);

    return m;

function checkModuleSyntaxError(source) {

    let m = parseModule(source);

    assertThrowsInstanceOf(() => moduleLink(m), SyntaxError);

let a = registerModule('a', parseModule("export var a = 1; export var b = 2;"));

let b = registerModule('b', parseModule("export var b = 3; export var c = 4;"));

let c = registerModule('c', parseModule("export * from 'a'; export * from 'b';"));

moduleLink(c);

moduleEvaluate(c);

// Check importing/exporting non-ambiguous name works.

let d = checkModuleEval("import { a } from 'c';");

assertEq(getModuleEnvironmentValue(d, "a"), 1);

checkModuleEval("export { a } from 'c';");

// Check importing/exporting ambiguous name is a syntax error.

checkModuleSyntaxError("import { b } from 'c';");

checkModuleSyntaxError("export { b } from 'c';");

// Check that namespace objects include only non-ambiguous names.

let m = parseModule("import * as ns from 'c';");

moduleLink(m);

moduleEvaluate(m);

let ns = c.namespace;

let names = Object.keys(ns);

assertEq(names.length, 2);

assertEq('a' in ns, true);

assertEq('b' in ns, false);

assertEq('c' in ns, true);