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Commit a1c41aef a1c41aef5ffae009722c66e48b28d66dcfef61ab by Nicolas Perriault
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error handling now mainly relies on phantom.onError()

1 parent aaf83a53
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Showing 3 changed files with 27 additions and 100 deletions
......@@ -28,6 +28,9 @@
*
*/
/**
* Loads and initialize the CasperJS environment.
*/
phantom.loadCasper = function loadCasper() {
// Patching fs
// TODO: watch for these methods being implemented in official fs module
......@@ -78,9 +81,6 @@ phantom.loadCasper = function loadCasper() {
// Embedded, up-to-date, validatable & controlable CoffeeScript
phantom.injectJs(fs.pathJoin(phantom.casperPath, 'modules', 'vendors', 'coffee-script.js'));
// Index of file sources, for error localization
phantom.sourceIds = {};
// custom global CasperError
window.CasperError = function CasperError(msg) {
Error.call(this);
......@@ -97,34 +97,6 @@ phantom.loadCasper = function loadCasper() {
// standard Error prototype inheritance
window.CasperError.prototype = Object.getPrototypeOf(new Error());
// Stack formatting
window.CasperError.prototype.formatStack = function formatStack() {
var location = this.fileName || phantom.sourceIds[this.sourceId] || "unknown";
location += ':' + (this.line ? this.line : 0);
return this.toString() + '\n ' + (this._from || "anonymous") + '() at ' + location;
};
/**
* Adding pseudo stack traces to CasperError
* Inspired by phantomjs-nodify: https://github.com/jgonera/phantomjs-nodify/
* TODO: remove when phantomjs has js engine upgrade
*/
if (!new CasperError().hasOwnProperty('stack')) {
Object.defineProperty(CasperError.prototype, 'stack', {
set: function set(string) {
this._stack = string;
},
get: function get() {
if (this._stack) {
return this._stack;
}
return this.formatStack();
},
configurable: true,
enumerable: true
});
}
// CasperJS version, extracted from package.json - see http://semver.org/
phantom.casperVersion = (function getVersion(path) {
var parts, patchPart, pkg, pkgFile;
......@@ -167,46 +139,12 @@ phantom.loadCasper = function loadCasper() {
phantom.getScriptCode = function getScriptCode(file, onError) {
var scriptCode = fs.read(file);
if (/\.coffee$/i.test(file)) {
try {
scriptCode = CoffeeScript.compile(scriptCode);
} catch (e) {
this.processScriptError(e, file, onError);
}
}
// trick to locate source file location on error
scriptCode += ";var __fe__ = new CasperError('__sourceId__')";
scriptCode += ";__fe__.fileName = '" + file.replace(/\\+/g, '/') + "'";
scriptCode += ";throw __fe__;";
return scriptCode;
};
/**
* Processes a given thrown Error; handles special cases and provides an
* optional callback argument.
*
* By default, the standard behavior on uncaught error is to print the
* error stack trace to the console and exit PhantomJS.
*
* @param Error error The Error instance
* @param String file A file path to associate to this error
* @param Function callback An optional callback
*/
phantom.processScriptError = function processScriptError(error, file, callback) {
if (error.sourceId && !this.sourceIds.hasOwnProperty(error.sourceId)) {
this.sourceIds[error.sourceId] = file;
}
if (error.message === "__sourceId__") {
return;
}
if (typeof callback === "function") {
callback(error, file);
} else {
console.error(error.stack);
this.exit(1);
}
};
/**
* Patching require() to allow loading of other modules than PhantomJS'
* builtin ones.
* Inspired by phantomjs-nodify: https://github.com/jgonera/phantomjs-nodify/
......@@ -266,13 +204,9 @@ phantom.loadCasper = function loadCasper() {
if (file in requireCache) {
return requireCache[file].exports;
}
try {
var scriptCode = phantom.getScriptCode(file);
var fn = new Function('require', 'module', 'exports', scriptCode);
fn(_require, module, module.exports);
} catch (e) {
phantom.processScriptError(e, file);
}
requireCache[file] = module;
return module.exports;
};
......@@ -288,6 +222,27 @@ phantom.loadCasper = function loadCasper() {
phantom.casperLoaded = true;
};
/**
* Custom global error handler.
*/
phantom.onError = function phantom_onError(msg, backtrace) {
var c = require('colorizer').create();
if (msg) {
console.error(c.colorize(msg, 'RED_BAR', 80));
}
backtrace.forEach(function(item) {
var message = require('fs').absolute(item.file) + ":" + c.colorize(item.line, "COMMENT");
if (item['function']) {
message += " in " + c.colorize(item['function'], "PARAMETER");
}
console.error(" " + message);
});
phantom.exit(1);
};
/**
* Initializes the CasperJS Command Line Interface.
*/
phantom.initCasperCli = function initCasperCli() {
var fs = require("fs");
......@@ -317,16 +272,11 @@ phantom.initCasperCli = function initCasperCli() {
phantom.exit(1);
}
// filter out the called script name from casper args
phantom.casperArgs.drop(phantom.casperScript);
// passed casperjs script execution
try {
new Function(phantom.getScriptCode(phantom.casperScript))();
} catch (e) {
phantom.processScriptError(e, phantom.casperScript);
}
phantom.injectJs(phantom.casperScript);
};
if (!phantom.casperLoaded) {
......
......@@ -366,13 +366,10 @@ var Tester = function Tester(casper, options) {
try {
new Function('casper', phantom.getScriptCode(file))(casper);
} catch (e) {
var self = this;
phantom.processScriptError(e, file, function onTestScriptError(error) {
// do not abort the whole suite, just fail fast displaying the
// caught error and process next suite
self.fail(e);
self.done();
});
this.fail(e);
this.done();
}
};
......
var error;
function foo() {
bar();
}
function bar() {
throw new CasperError('bar');
}
try {
foo();
} catch (e) {
error = e;
}
casper.test.assertType(error.stack, "string", "CasperError() has a stack string property set");
casper.test.assertMatch(error.stack, /^CasperError: bar\s/, "CasperError() has the expected stack value");
casper.test.done();