ErrorStack.js - mozsearch

// |reftest| skip-if(!xulRuntime.shell) -- needs drainJobQueue

var BUGNUMBER = 1343158;

var summary = "Error.stack should provide meaningful stack trace in async function";

print(BUGNUMBER + ": " + summary);

let COOKIE = "C0F5DBB89807";

async function thrower() {

    let stack = new Error().stack; // line 11

    assertEq(/^thrower@.+ErrorStack.js:11/m.test(stack), true, toMessage(stack));

    assertEq(/^inner@.+ErrorStack.js:38/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*middle@.+ErrorStack.js:58/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));

    throw new Error(COOKIE); // line 18

async function inner() {

    let stack = new Error().stack; // line 22

    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/^inner@.+ErrorStack.js:22/m.test(stack), true, toMessage(stack));

    assertEq(/^middle@.+ErrorStack.js:58/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));

    await Promise.resolve(100);

    stack = new Error().stack; // line 31

    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/^inner@.+ErrorStack.js:31/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*middle@.+ErrorStack.js:58/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));

    await thrower(); // line 38

async function middle() {

    let stack = new Error().stack; // line 42

    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/inner@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/^middle@.+ErrorStack.js:42/m.test(stack), true, toMessage(stack));

    assertEq(/^outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));

    await Promise.resolve(1000);

    stack = new Error().stack; // line 51

    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/inner@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/^middle@.+ErrorStack.js:51/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));

    await inner(); // line 58

async function outer() {

    let stack = new Error().stack; // line 62

    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/inner@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/middle@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/^outer@.+ErrorStack.js:62/m.test(stack), true, toMessage(stack));

    assertEq(/^@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));

    await Promise.resolve(10000);

    stack = new Error().stack; // line 71

    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/inner@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/middle@.+ErrorStack.js/m.test(stack), false, toMessage(stack));

    assertEq(/^outer@.+ErrorStack.js:71/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));

    await middle(); // line 78

try {

    getPromiseResult(outer()); // line 82

    assertEq(true, false);

} catch (e) {

    // Re-throw the exception to log the assertion failure properly.

    if (!e.message.includes(COOKIE))

        throw e;

    let stack = e.stack;

    assertEq(/^thrower@.+ErrorStack.js:18/m.test(stack), true, toMessage(stack));

    assertEq(/^inner@.+ErrorStack.js:38/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*middle@.+ErrorStack.js:58/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));

    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));

function toMessage(stack) {

    // Provide the stack string in the error message for debugging.

    return `[stack: ${stack.replace(/\n/g, "\\n")}]`;

if (typeof reportCompare === "function")

    reportCompare(true, true);