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var semver = require("semver");
var vm = require("vm");
var setupContext = new vm.Script([
"[ Array, Boolean, Error, Function, Number, Object, RegExp, String ].forEach(function(f) {",
" f.toString = Function.prototype.toString;",
"});",
"Function.prototype.toString = function() {",
" var id = 100000;",
" return function() {",
" var n = this.name;",
" if (!/^F[0-9]{6}N$/.test(n)) {",
' n = "F" + ++id + "N";',
].concat(Object.getOwnPropertyDescriptor(Function.prototype, "name").configurable ? [
' Object.defineProperty(this, "name", {',
" get: function() {",
" return n;",
" }",
" });",
] : [], [
" }",
' return "function(){}";',
" };",
"}();",
"this;",
]).join("\n"));
function createContext() {
var ctx = vm.createContext(Object.defineProperty({}, "console", { value: { log: log } }));
var global = setupContext.runInContext(ctx);
return ctx;
function safe_log(arg, level) {
if (arg) switch (typeof arg) {
case "function":
return arg.toString();
case "object":
if (arg === global) return "[object global]";
if (/Error$/.test(arg.name)) return arg.toString();
arg.constructor.toString();
if (level--) for (var key in arg) {
var desc = Object.getOwnPropertyDescriptor(arg, key);
if (!desc || !desc.get) arg[key] = safe_log(arg[key], level);
}
}
return arg;
}
function log(msg) {
if (arguments.length == 1 && typeof msg == "string") return console.log("%s", msg);
return console.log.apply(console, [].map.call(arguments, function(arg) {
return safe_log(arg, 3);
}));
}
}
exports.run_code = function(code, toplevel, timeout) {
timeout = timeout || 5000;
var stdout = "";
var original_write = process.stdout.write;
process.stdout.write = function(chunk) {
stdout += chunk;
};
try {
vm.runInContext(toplevel ? "(function(){" + code + "})()" : code, createContext(), { timeout: timeout });
return stdout;
} catch (ex) {
return ex;
} finally {
process.stdout.write = original_write;
}
};
function strip_func_ids(text) {
return ("" + text).replace(/F[0-9]{6}N/g, "<F<>N>");
}
exports.same_stdout = semver.satisfies(process.version, "0.12") ? function(expected, actual) {
if (typeof expected != typeof actual) return false;
if (typeof expected != "string") {
if (expected.name != actual.name) return false;
expected = expected.message.slice(expected.message.lastIndexOf("\n") + 1);
actual = actual.message.slice(actual.message.lastIndexOf("\n") + 1);
}
return strip_func_ids(expected) == strip_func_ids(actual);
} : function(expected, actual) {
return typeof expected == typeof actual && strip_func_ids(expected) == strip_func_ids(actual);
};
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