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/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/publicdomain/zero/1.0/ */
"use strict";
// ------------------------------------------------------------------------------
// Requirements
// ------------------------------------------------------------------------------
var rule = require("../lib/rules/use-isInstance");
var RuleTester = require("eslint").RuleTester;
const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: "latest" } });
// ------------------------------------------------------------------------------
// Tests
// ------------------------------------------------------------------------------
const errors = [
{
message:
"Please prefer .isInstance() in chrome scripts over the standard instanceof operator for DOM interfaces, " +
"since the latter will return false when the object is created from a different context.",
type: "BinaryExpression",
},
];
const env = { browser: true };
/**
* A test case boilerplate simulating chrome privileged script.
* @param {string} code
*/
function mockChromeScript(code) {
return {
code,
filename: "foo.sys.mjs",
env,
};
}
/**
* A test case boilerplate simulating content script.
* @param {string} code
*/
function mockContentScript(code) {
return {
code,
filename: "foo.js",
env,
};
}
ruleTester.run("use-isInstance", rule, {
valid: [
mockChromeScript("(() => {}) instanceof Function;"),
mockChromeScript("({}) instanceof Object;"),
mockChromeScript("Node instanceof Object;"),
mockChromeScript("node instanceof lazy.Node;"),
mockChromeScript("var Node;node instanceof Node;"),
mockChromeScript("file instanceof lazy.File;"),
mockChromeScript("file instanceof OS.File;"),
mockChromeScript("file instanceof OS.File.Error;"),
mockChromeScript("file instanceof lazy.OS.File;"),
mockChromeScript("file instanceof lazy.OS.File.Error;"),
mockChromeScript("file instanceof lazy.lazy.OS.File;"),
mockChromeScript("var File;file instanceof File;"),
mockChromeScript("foo instanceof RandomGlobalThing;"),
mockChromeScript("foo instanceof lazy.RandomGlobalThing;"),
mockContentScript("node instanceof Node;"),
mockContentScript("file instanceof File;"),
mockContentScript(
"SpecialPowers.ChromeUtils.import(''); file instanceof File;"
),
],
invalid: [
{
code: "node instanceof Node",
output: "Node.isInstance(node)",
env,
errors,
filename: "foo.sys.mjs",
},
{
code: "text instanceof win.Text",
output: "win.Text.isInstance(text)",
errors,
filename: "foo.sys.mjs",
},
{
code: "target instanceof this.contentWindow.HTMLAudioElement",
output: "this.contentWindow.HTMLAudioElement.isInstance(target)",
errors,
filename: "foo.sys.mjs",
},
{
code: "target instanceof File",
output: "File.isInstance(target)",
env,
errors,
filename: "foo.sys.mjs",
},
{
code: "target instanceof win.File",
output: "win.File.isInstance(target)",
errors,
filename: "foo.sys.mjs",
},
{
code: "window.arguments[0] instanceof window.XULElement",
output: "window.XULElement.isInstance(window.arguments[0])",
errors,
filename: "foo.sys.mjs",
},
{
code: "ChromeUtils.import(''); node instanceof Node",
output: "ChromeUtils.import(''); Node.isInstance(node)",
env,
errors,
filename: "foo.js",
},
{
code: "ChromeUtils.import(''); file instanceof File",
output: "ChromeUtils.import(''); File.isInstance(file)",
env,
errors,
filename: "foo.js",
},
],
});
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