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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,145 @@ | ||
| /* global lockdown */ | ||
| import test from 'tape'; | ||
| import '../src/main.js'; | ||
|
|
||
| // TODO test Error API in | ||
| // * non - start compartments | ||
| // * with { errorTaming: 'safe' } | ||
| // * on non-v8 | ||
| lockdown({ errorTaming: 'unsafe' }); | ||
|
|
||
| // depd (https://github.com/dougwilson/nodejs-depd) uses a stack trace to | ||
| // determine the call site of a deprecated function | ||
|
|
||
| function simulateDepd() { | ||
| function prepareObjectStackTrace(obj, stack) { | ||
| return stack; | ||
| } | ||
|
|
||
| function callSiteLocation(callSite) { | ||
| let file = callSite.getFileName() || '<anonymous>'; | ||
| const line = callSite.getLineNumber(); | ||
| const colm = callSite.getColumnNumber(); | ||
| if (callSite.isEval()) { | ||
| file = `${callSite.getEvalOrigin()}, ${file}`; | ||
| } | ||
| const site = [file, line, colm]; | ||
| site.callSite = callSite; | ||
| site.name = callSite.getFunctionName(); | ||
| return site; | ||
| } | ||
|
|
||
| function getStack() { | ||
| const limit = Error.stackTraceLimit; | ||
| const obj = {}; | ||
| const prep = Error.prepareStackTrace; | ||
| Error.prepareStackTrace = prepareObjectStackTrace; | ||
| Error.stackTraceLimit = Math.max(10, limit); | ||
| // capture the stack | ||
| Error.captureStackTrace(obj); | ||
| // slice this function off the top | ||
| const stack = obj.stack.slice(1); | ||
| Error.prepareStackTrace = prep; | ||
| Error.stackTraceLimit = limit; | ||
| return stack; | ||
| } | ||
|
|
||
| function middle() { | ||
| return getStack(); | ||
| } | ||
|
|
||
| const site = callSiteLocation(middle()[0]); | ||
| return site.name; | ||
| } | ||
|
|
||
| test('Error compatibility - depd', t => { | ||
| // the Start Compartment should support this sort of manipulation | ||
| const name = simulateDepd(); | ||
| t.equal(name, 'middle'); | ||
|
|
||
| // however a new Compartment should not | ||
| // const c = new Compartment({ console }); | ||
| // const sim = c.evaluate(`(${simulateDepd})`); | ||
| // t.throws(() => sim(), /Cannot add property prepareStackTrace, object is not extensible/); | ||
|
|
||
| t.end(); | ||
| }); | ||
|
|
||
| // callstack (https://github.com/nailgun/node-callstack#readme) returns a | ||
| // stack as a list of strings, by reading Error().stack | ||
| function simulateCallstack() { | ||
| function callstack() { | ||
| return new Error().stack.split('\n').splice(2); | ||
| } | ||
| function middle() { | ||
| return callstack(); | ||
| } | ||
| return middle(); | ||
| } | ||
|
|
||
| test('Error compatibility - callstack', t => { | ||
| const stack = simulateCallstack(); | ||
| // TODO: upgrade to tape 5.x for t.match | ||
| // t.match(stack[0], /at middle/, '"middle" found in callstack() output'); | ||
| t.notEqual( | ||
| stack[0].search(/at middle/), | ||
| -1, | ||
| '"middle" found in callstack() output', | ||
| ); | ||
|
|
||
| t.end(); | ||
| }); | ||
|
|
||
| // callsite (https://www.npmjs.com/package/callsite) returns a list of stack | ||
| // frames, obtained by replacing Error.prepareStackTrace . | ||
| function simulateCallsite() { | ||
| function callsite() { | ||
| const orig = Error.prepareStackTrace; | ||
| Error.prepareStackTrace = (_, stack) => stack; | ||
| const err = new Error(); | ||
| Error.captureStackTrace(err, callsite); | ||
| const { stack } = err; | ||
| Error.prepareStackTrace = orig; | ||
| return stack; | ||
| } | ||
|
|
||
| function middle() { | ||
| return callsite(); | ||
| } | ||
|
|
||
| return middle()[0].getFunctionName(); | ||
| } | ||
|
|
||
| test('Error compatibility - callsite', t => { | ||
| const name = simulateCallsite(); | ||
| t.equal(name, 'middle'); | ||
|
|
||
| t.end(); | ||
| }); | ||
|
|
||
| // callsites from | ||
| // https://github.com/sindresorhus/callsites/blob/master/index.js | ||
| // triggers prepareStackTrace by accessing the `.stack` property | ||
| // of an error, rather than calling `captureStackTrace`. | ||
| function simulateCallsites() { | ||
| function callsites() { | ||
| const orig = Error.prepareStackTrace; | ||
| Error.prepareStackTrace = (_, stack) => stack; | ||
| const stack = new Error().stack.slice(1); | ||
| Error.prepareStackTrace = orig; | ||
| return stack; | ||
| } | ||
|
|
||
| function middle() { | ||
| return callsites(); | ||
| } | ||
|
|
||
| return middle()[0].getFunctionName(); | ||
| } | ||
|
|
||
| test('Error compatibility - callsites', t => { | ||
| const name = simulateCallsites(); | ||
| t.equal(name, 'middle'); | ||
|
|
||
| t.end(); | ||
| }); |