module.js - mozsearch

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// |jit-test|

load(libdir + "asserts.js");

async function parseAndEvaluate(source) {

    let stencil = compileToStencilXDR(source, {module: true});

    let m = instantiateModuleStencilXDR(stencil);

    moduleLink(m);

    await moduleEvaluate(m);

    return m;

(async () => {

  // Check the evaluation of an empty module succeeds.

  await parseAndEvaluate("");

})();

(async () => {

  // Check that evaluation returns evaluation promise,

  // and promise is always the same.

  let stencil = compileToStencilXDR("1", {module: true});

  let m = instantiateModuleStencilXDR(stencil);

  moduleLink(m);

  assertEq(typeof moduleEvaluate(m), "object");

  assertEq(moduleEvaluate(m) instanceof Promise, true);

  assertEq(moduleEvaluate(m), moduleEvaluate(m));

})();

(async () => {

  // Check top level variables are initialized by evaluation.

  let stencil = compileToStencilXDR("export var x = 2 + 2;", {module: true});

  let m = instantiateModuleStencilXDR(stencil);

  assertEq(typeof getModuleEnvironmentValue(m, "x"), "undefined");

  moduleLink(m);

  await moduleEvaluate(m);

  assertEq(getModuleEnvironmentValue(m, "x"), 4);

})();

(async () => {

  let m = await parseAndEvaluate("export let x = 2 * 3;");

  assertEq(getModuleEnvironmentValue(m, "x"), 6);

  // Set up a module to import from.

  let stencil = compileToStencilXDR(

    `var x = 1;

     export { x };

     export default 2;

     export function f(x) { return x + 1; }`,

  {module: true});

  let mod = instantiateModuleStencilXDR(stencil);

  let a = registerModule('a', mod);

  // Check we can evaluate top level definitions.

  await parseAndEvaluate("var foo = 1;");

  await parseAndEvaluate("let foo = 1;");

  await parseAndEvaluate("const foo = 1");

  await parseAndEvaluate("function foo() {}");

  await parseAndEvaluate("class foo { constructor() {} }");

  // Check we can evaluate all module-related syntax.

  await parseAndEvaluate("export var foo = 1;");

  await parseAndEvaluate("export let foo = 1;");

  await parseAndEvaluate("export const foo = 1;");

  await parseAndEvaluate("var x = 1; export { x };");

  await parseAndEvaluate("export default 1");

  await parseAndEvaluate("export default function() {};");

  await parseAndEvaluate("export default function foo() {};");

  await parseAndEvaluate("import a from 'a';");

  await parseAndEvaluate("import { x } from 'a';");

  await parseAndEvaluate("import * as ns from 'a';");

  await parseAndEvaluate("export * from 'a'");

  await parseAndEvaluate("export default class { constructor() {} };");

  await parseAndEvaluate("export default class foo { constructor() {} };");

  // Test default import

  m = await parseAndEvaluate("import a from 'a'; export { a };")

  assertEq(getModuleEnvironmentValue(m, "a"), 2);

  // Test named import

  m = await parseAndEvaluate("import { x as y } from 'a'; export { y };")

  assertEq(getModuleEnvironmentValue(m, "y"), 1);

  // Call exported function

  m = await parseAndEvaluate("import { f } from 'a'; export let x = f(3);")

  assertEq(getModuleEnvironmentValue(m, "x"), 4);

  // Import access in functions

  m = await parseAndEvaluate("import { x } from 'a'; function f() { return x; }")

  let f = getModuleEnvironmentValue(m, "f");

  assertEq(f(), 1);

})();

drainJobQueue();