duplicate-exports.js

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// Test errors due to duplicate exports

load(libdir + "asserts.js");

function testSyntaxError(source) {

    assertThrowsInstanceOf(function () {

        parseModule(source);

    }, SyntaxError);

// SyntexError due to duplicate exports

testSyntaxError("export var v; export var v;");

testSyntaxError("export var x, y, z; export var y;");

testSyntaxError("export let v; var w; export {w as v};");

testSyntaxError("export const v; var w; export {w as v};");

testSyntaxError("export var v; let w; export {w as v};");

testSyntaxError("export var v; const w; export {w as v};");

testSyntaxError("export default 1; export default 2;");

testSyntaxError("export default 1; export default function() {};");

testSyntaxError("export default 1; export default function foo() {};");

testSyntaxError("var v; export {v}; export {v};");

testSyntaxError("var v, x; export {v}; export {x as v};");

testSyntaxError("export default 1; export default export class { constructor() {} };");

testSyntaxError("export default 1; export default export class foo { constructor() {} };");

// SyntaxError due to redeclared binding

testSyntaxError("export let v; export let v;");

testSyntaxError("export let x, y, z; export let y;");

testSyntaxError("export const v = 0; export const v = 0;");

testSyntaxError("export const x = 0, y = 0, z = 0; export const y = 0;");

testSyntaxError("export var v; export let v;");

testSyntaxError("export var v; export const v = 0;");

testSyntaxError("export let v; export const v;");