browser_jsterm_await_dynamic_import.js

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/* Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/publicdomain/zero/1.0/ */

// Test that top-level await with dynamic import works as expected.

"use strict";

const TEST_URI =

  "http://example.com/browser/devtools/client/webconsole/test/browser/test-dynamic-import.html";

add_task(async function () {

  // Enable dynamic import

  await pushPref("javascript.options.dynamicImport", true);

  // Enable await mapping.

  await pushPref("devtools.debugger.features.map-await-expression", true);

  const hud = await openNewTabAndConsole(TEST_URI);

  info("Evaluate an expression with a dynamic import");

  let importAwaitExpression = `

    var {sum} = await import("./test-dynamic-import.mjs");

    sum(1, 2, 3);

`;

  await executeAndWaitForResultMessage(

    hud,

    importAwaitExpression,

    `1 + 2 + 3 = 6`

);

  ok(true, "The `sum` module was imported and used successfully");

  info("Import the same module a second time");

  // This used to make the content page crash (See Bug 1523897).

  importAwaitExpression = `

    var {sum} = await import("./test-dynamic-import.mjs");

    sum(2, 3, 4);

`;

  await executeAndWaitForResultMessage(

    hud,

    importAwaitExpression,

    `2 + 3 + 4 = 9`

);

  ok(true, "The `sum` module was imported and used successfully a second time");

});