84 lines
2.3 KiB
JavaScript
84 lines
2.3 KiB
JavaScript
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var repl = require('repl');
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var debuggerCommons = require('../debuggerCommons');
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var DebuggerRepl = require('../modes/debuggerRepl');
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/**
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* Custom protractor debugger which steps through one control flow task at a time.
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*
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* @constructor
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*/
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var WdDebugger = function() {
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this.client;
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this.replServer;
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this.dbgRepl;
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};
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/**
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* Eval function for processing a single step in repl.
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* @private
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* @param {string} cmd
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* @param {object} context
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* @param {string} filename
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* @param {function} callback
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*/
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WdDebugger.prototype.stepEval_ = function(cmd, context, filename, callback) {
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// The loop won't come back until 'callback' is called.
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// Note - node's debugger gets around this by adding custom objects
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// named 'c', 's', etc to the REPL context. They have getters which
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// perform the desired function, and the callback is stored for later use.
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// Think about whether this is a better pattern.
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cmd = debuggerCommons.trimReplCmd(cmd);
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this.dbgRepl.stepEval(cmd, callback);
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};
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/**
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* Instantiate all repl objects, and debuggerRepl as current and start repl.
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* @private
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*/
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WdDebugger.prototype.initRepl_ = function() {
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var self = this;
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this.dbgRepl = new DebuggerRepl(this.client);
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// We want the prompt to show up only after the controlflow text prints.
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this.dbgRepl.printControlFlow_(function() {
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self.replServer = repl.start({
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prompt: self.dbgRepl.prompt,
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input: process.stdin,
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output: process.stdout,
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eval: self.stepEval_.bind(self),
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useGlobal: false,
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ignoreUndefined: true,
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completer: self.dbgRepl.complete.bind(self.dbgRepl)
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});
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self.replServer.on('exit', function() {
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console.log('Resuming code execution');
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self.client.req({command: 'disconnect'}, function() {
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process.exit();
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});
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});
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});
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};
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/**
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* Initiate the debugger.
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* @public
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*/
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WdDebugger.prototype.init = function() {
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var self = this;
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this.client = debuggerCommons.attachDebugger(process.argv[2], process.argv[3]);
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this.client.once('ready', function() {
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debuggerCommons.setWebDriverCommandBreakpoint(self.client, function() {
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process.send('ready');
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self.client.reqContinue(function() {
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// Intentionally blank.
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});
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});
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self.initRepl_();
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});
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};
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var wdDebugger = new WdDebugger();
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wdDebugger.init();
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