Jasmine Global Scope Pollution Reporter

gistfile1.md

Jasmine Global Pollution Reporter

• Requires underscorejs. download
• After a spec finishes running it logs any global scope pollution that occurred.
• After test runner has finished it logs a summary of the global scope pollution.

jasmine-global-pollution.js

jasmine.GlobalPollutionReporter = function() {

};

jasmine.GlobalPollutionReporter.prototype.reportRunnerStarting = function(runner) {
	this.globalState = scopePollution.getGlobalState();
	this.lastState = this.globalState;
};

jasmine.GlobalPollutionReporter.prototype.reportRunnerResults = function(runner) {
	var globalStateDiff = scopePollution.getGlobalPollution(this.globalState);
	if(globalStateDiff.added.length > 0){
		console.log('Overall introduced global variable(s): ', globalStateDiff.added.join(', '));
	}
	if(globalStateDiff.deleted.length > 0){
		console.log('Overall deleted global variable(s): ', globalStateDiff.deleted.join(', '));
	}
};

jasmine.GlobalPollutionReporter.prototype.reportSuiteResults = function(suite) {

};

jasmine.GlobalPollutionReporter.prototype.reportSpecStarting = function(spec) {

};

jasmine.GlobalPollutionReporter.prototype.reportSpecResults = function(spec) {
	var globalStateDiff = scopePollution.getGlobalPollution(this.lastState);
	this.lastState = scopePollution.getGlobalState();
	if(globalStateDiff.added.length > 0){
		console.log('Spec "' + spec.getFullName() + '"' + ' - Introduced global variable(s): ', globalStateDiff.added.join(', '));
	}

	if(globalStateDiff.deleted.length > 0){
		console.log('Spec "' + spec.getFullName() + '"' + ' - Deleted global variable(s): ', globalStateDiff.deleted.join(', '));
	}
};

jasmine.GlobalPollutionReporter.prototype.log = function(str) {

};

scope-pollution.js

var scopePollution = (function(){

	function getState(root) {
		var state = [];
		
		for ( var key in root ) {
			if ( !_.has( root, key )) {
				continue;
			}
			state.push( key );
		}
		return state;
	}

	function getPollution(root, oldState){
		var newState = getState(root);

		return {
			'added': _.difference(newState, oldState),
			'deleted': _.difference(oldState, newState)
		};
	}

	function getGlobalState(){
		return getState(window);
	}

	function getGlobalPollution(state){
		return getPollution(window, state);
	}

	return {
		'getState': getState,
		'getPollution': getPollution,
		'getGlobalState': getGlobalState,
		'getGlobalPollution': getGlobalPollution
	};
})();