expect.js
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var util = require('util');
var events = require('events');
var chai = require('chai-nightwatch');
var expect = chai.expect;
var ChaiAssertion = chai.Assertion;
var Q = require('q');
var flag = chai.flag;
module.exports = function(client) {
var Protocol = require('./protocol.js')(client);
var PresentAssertion = require('./expect/present.js');
var AttributeAssertion = require('./expect/attribute.js');
var CssAssertion = require('./expect/css.js');
var TextAssertion = require('./expect/text.js');
var EnabledAssertion = require('./expect/enabled.js');
var VisibleAssertion = require('./expect/visible.js');
var SelectedAssertion = require('./expect/selected.js');
var TypeAssertion = require('./expect/type.js');
var ValueAssertion = require('./expect/value.js');
var Expect = {};
ChaiAssertion.addMethod('before', function(ms) {
flag(this, 'waitFor', ms);
flag(this, 'before', true);
});
ChaiAssertion.addMethod('after', function(ms) {
flag(this, 'after', true);
flag(this, 'waitFor', ms);
});
ChaiAssertion.addProperty('present', function() {
createAssertion(PresentAssertion, this);
});
ChaiAssertion.addProperty('enabled', function() {
createAssertion(EnabledAssertion, this);
});
ChaiAssertion.addProperty('text', function() {
createAssertion(TextAssertion, this);
});
ChaiAssertion.addProperty('value', function() {
createAssertion(ValueAssertion, this);
});
ChaiAssertion.addProperty('visible', function() {
createAssertion(VisibleAssertion, this);
});
ChaiAssertion.addProperty('selected', function() {
createAssertion(SelectedAssertion, this);
});
ChaiAssertion.addMethod('attribute', function(attribute, msg) {
createAssertion(AttributeAssertion, this, [attribute, msg]);
});
ChaiAssertion.addMethod('css', function(property, msg) {
createAssertion(CssAssertion, this, [property, msg]);
});
function typeAssertion(type, msg) {
createAssertion(TypeAssertion, this, [type, msg]);
}
ChaiAssertion.addMethod('a', typeAssertion);
ChaiAssertion.addMethod('an', typeAssertion);
function createAssertion(AssertionClass, chaiAssert, args) {
function F() {
this.setAssertion(chaiAssert)
.setClient(client)
.setProtocol(Protocol)
.init();
return AssertionClass.apply(this, args);
}
F.prototype = AssertionClass.prototype;
chaiAssert.assertion = new F();
}
function Element(selector, using) {
this.selector = selector;
this.using = using;
this.startTime = null;
this.emitter = null;
this.createPromise();
}
util.inherits(Element, events.EventEmitter);
Element.prototype.getElementsCommand = function(callback) {
this.locator = this.using || client.locateStrategy || 'css selector';
return Protocol.elements(this.locator, this.selector, callback);
};
Element.prototype.promise = function() {
return this.deferred.promise;
};
Element.prototype.createPromise = function() {
this.deferred = Q.defer();
return this.deferred.promise;
};
Element.prototype.locate = function(emitter) {
if (emitter) {
this.emitter = emitter;
this.startTime = new Date().getTime();
}
this.getElementsCommand(function(result) {
if (result.status !== 0 || !result.value || result.value.length === 0) {
this.deferred.reject(result);
} else {
this.deferred.resolve(result.value[0]);
}
}.bind(this));
};
Expect.element = function(selector, using) {
var element = new Element(selector, using);
var promise = element.promise();
var expect = chai.expect(promise);
flag(expect, 'selector', selector);
flag(expect, 'promise', promise);
flag(expect, 'element', element);
return {
element : element,
expect : expect
};
};
return Expect;
};