test_safeErrorString.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

// Test DevToolsUtils.safeErrorString

function run_test() {

  test_with_error();

  test_with_tricky_error();

  test_with_string();

  test_with_thrower();

  test_with_psychotic();

function test_with_error() {

  const s = DevToolsUtils.safeErrorString(new Error("foo bar"));

  // Got the message.

  Assert.ok(s.includes("foo bar"));

  // Got the stack.

  Assert.ok(s.includes("test_with_error"));

  Assert.ok(s.includes("test_safeErrorString.js"));

  // Got the lineNumber and columnNumber.

  Assert.ok(s.includes("Line"));

  Assert.ok(s.includes("column"));

function test_with_tricky_error() {

  const e = new Error("batman");

  e.stack = { toString: Object.create(null) };

  const s = DevToolsUtils.safeErrorString(e);

  // Still got the message, despite a bad stack property.

  Assert.ok(s.includes("batman"));

function test_with_string() {

  const s = DevToolsUtils.safeErrorString("not really an error");

  // Still get the message.

  Assert.ok(s.includes("not really an error"));

function test_with_thrower() {

  const s = DevToolsUtils.safeErrorString({

    toString: () => {

      throw new Error("Muahahaha");

},

});

  // Still don't fail, get string back.

  Assert.equal(typeof s, "string");

function test_with_psychotic() {

  const s = DevToolsUtils.safeErrorString({

    toString: () => Object.create(null),

});

  // Still get a string out, and no exceptions thrown

  Assert.equal(typeof s, "string");

  Assert.equal(s, "[object Object]");