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375 lines
15 KiB
JavaScript
375 lines
15 KiB
JavaScript
/*
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* Copyright 2004 ThoughtWorks, Inc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// A naming convention used in this file:
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//
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//
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// - a "seleniumApi" is an instance of the Selenium object, defined in selenium-api.js.
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//
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// - a "Method" is an unbound function whose target must be supplied when it's called, ie.
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// it should be invoked using Function.call() or Function.apply()
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//
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// - a "Block" is a function that has been bound to a target object, so can be called invoked directly
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// (or with a null target)
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//
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// - "CommandHandler" is effectively an abstract base for
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// various handlers including ActionHandler, AccessorHandler and AssertHandler.
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// Subclasses need to implement an execute(seleniumApi, command) function,
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// where seleniumApi is the Selenium object, and command a SeleniumCommand object.
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//
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// - Handlers will return a "result" object (ActionResult, AccessorResult, AssertResult).
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// ActionResults may contain a .terminationCondition function which is run by
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// -executionloop.js after the command is run; we'll run it over and over again
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// until it returns true or the .terminationCondition throws an exception.
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// AccessorResults will contain the results of running getter (e.g. getTitle returns
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// the title as a string).
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var CommandHandlerFactory = classCreate();
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objectExtend(CommandHandlerFactory.prototype, {
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initialize: function() {
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this.handlers = {};
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},
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registerAction: function(name, actionBlock, wait, dontCheckAlertsAndConfirms) {
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this.handlers[name] = new ActionHandler(actionBlock, wait, dontCheckAlertsAndConfirms);
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},
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registerAccessor: function(name, accessBlock) {
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this.handlers[name] = new AccessorHandler(accessBlock);
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},
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registerAssert: function(name, assertBlock, haltOnFailure) {
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this.handlers[name] = new AssertHandler(assertBlock, haltOnFailure);
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},
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getCommandHandler: function(name) {
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return this.handlers[name];
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},
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_registerAllAccessors: function(seleniumApi) {
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// Methods of the form getFoo(target) result in commands:
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// getFoo, assertFoo, verifyFoo, assertNotFoo, verifyNotFoo
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// storeFoo, waitForFoo, and waitForNotFoo.
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for (var functionName in seleniumApi) {
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var match = /^(get|is)([A-Z].+)$/.exec(functionName);
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if (match) {
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var accessMethod = seleniumApi[functionName];
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var accessBlock = fnBind(accessMethod, seleniumApi);
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var baseName = match[2];
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var isBoolean = (match[1] == "is");
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var requiresTarget = (accessMethod.length == 1);
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this.registerAccessor(functionName, accessBlock);
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this._registerStoreCommandForAccessor(baseName, accessBlock, requiresTarget);
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var predicateBlock = this._predicateForAccessor(accessBlock, requiresTarget, isBoolean);
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this._registerAssertionsForPredicate(baseName, predicateBlock);
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this._registerWaitForCommandsForPredicate(seleniumApi, baseName, predicateBlock);
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}
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}
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},
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_registerAllActions: function(seleniumApi) {
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for (var functionName in seleniumApi) {
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var match = /^do([A-Z].+)$/.exec(functionName);
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if (match) {
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var actionName = match[1].lcfirst();
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var actionMethod = seleniumApi[functionName];
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var dontCheckPopups = actionMethod.dontCheckAlertsAndConfirms;
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var actionBlock = fnBind(actionMethod, seleniumApi);
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this.registerAction(actionName, actionBlock, false, dontCheckPopups);
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this.registerAction(actionName + "AndWait", actionBlock, true, dontCheckPopups);
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}
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}
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},
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_registerAllAsserts: function(seleniumApi) {
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for (var functionName in seleniumApi) {
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var match = /^assert([A-Z].+)$/.exec(functionName);
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if (match) {
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var assertBlock = fnBind(seleniumApi[functionName], seleniumApi);
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// Register the assert with the "assert" prefix, and halt on failure.
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var assertName = functionName;
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this.registerAssert(assertName, assertBlock, true);
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// Register the assert with the "verify" prefix, and do not halt on failure.
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var verifyName = "verify" + match[1];
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this.registerAssert(verifyName, assertBlock, false);
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}
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}
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},
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registerAll: function(seleniumApi) {
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this._registerAllAccessors(seleniumApi);
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this._registerAllActions(seleniumApi);
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this._registerAllAsserts(seleniumApi);
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},
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_predicateForAccessor: function(accessBlock, requiresTarget, isBoolean) {
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if (isBoolean) {
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return this._predicateForBooleanAccessor(accessBlock);
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}
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if (requiresTarget) {
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return this._predicateForSingleArgAccessor(accessBlock);
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}
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return this._predicateForNoArgAccessor(accessBlock);
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},
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_predicateForSingleArgAccessor: function(accessBlock) {
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// Given an accessor function getBlah(target),
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// return a "predicate" equivalient to isBlah(target, value) that
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// is true when the value returned by the accessor matches the specified value.
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return function(target, value) {
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var accessorResult = accessBlock(target);
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if (PatternMatcher.matches(value, accessorResult)) {
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return new PredicateResult(true, "Actual value '" + accessorResult + "' did match '" + value + "'");
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} else {
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return new PredicateResult(false, "Actual value '" + accessorResult + "' did not match '" + value + "'");
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}
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};
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},
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_predicateForNoArgAccessor: function(accessBlock) {
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// Given a (no-arg) accessor function getBlah(),
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// return a "predicate" equivalient to isBlah(value) that
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// is true when the value returned by the accessor matches the specified value.
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return function(value) {
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var accessorResult = accessBlock();
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if (PatternMatcher.matches(value, accessorResult)) {
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return new PredicateResult(true, "Actual value '" + accessorResult + "' did match '" + value + "'");
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} else {
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return new PredicateResult(false, "Actual value '" + accessorResult + "' did not match '" + value + "'");
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}
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};
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},
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_predicateForBooleanAccessor: function(accessBlock) {
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// Given a boolean accessor function isBlah(),
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// return a "predicate" equivalient to isBlah() that
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// returns an appropriate PredicateResult value.
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return function() {
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var accessorResult;
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if (arguments.length > 2) throw new SeleniumError("Too many arguments! " + arguments.length);
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if (arguments.length == 2) {
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accessorResult = accessBlock(arguments[0], arguments[1]);
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} else if (arguments.length == 1) {
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accessorResult = accessBlock(arguments[0]);
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} else {
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accessorResult = accessBlock();
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}
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if (accessorResult) {
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return new PredicateResult(true, "true");
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} else {
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return new PredicateResult(false, "false");
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}
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};
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},
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_invertPredicate: function(predicateBlock) {
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// Given a predicate, return the negation of that predicate.
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// Leaves the message unchanged.
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// Used to create assertNot, verifyNot, and waitForNot commands.
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return function(target, value) {
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var result = predicateBlock(target, value);
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result.isTrue = !result.isTrue;
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return result;
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};
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},
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createAssertionFromPredicate: function(predicateBlock) {
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// Convert an isBlahBlah(target, value) function into an assertBlahBlah(target, value) function.
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return function(target, value) {
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var result = predicateBlock(target, value);
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if (!result.isTrue) {
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Assert.fail(result.message);
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}
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};
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},
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_invertPredicateName: function(baseName) {
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var matchResult = /^(.*)Present$/.exec(baseName);
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if (matchResult != null) {
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return matchResult[1] + "NotPresent";
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}
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return "Not" + baseName;
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},
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_registerAssertionsForPredicate: function(baseName, predicateBlock) {
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// Register an assertion, a verification, a negative assertion,
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// and a negative verification based on the specified accessor.
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var assertBlock = this.createAssertionFromPredicate(predicateBlock);
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this.registerAssert("assert" + baseName, assertBlock, true);
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this.registerAssert("verify" + baseName, assertBlock, false);
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var invertedPredicateBlock = this._invertPredicate(predicateBlock);
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var negativeassertBlock = this.createAssertionFromPredicate(invertedPredicateBlock);
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this.registerAssert("assert" + this._invertPredicateName(baseName), negativeassertBlock, true);
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this.registerAssert("verify" + this._invertPredicateName(baseName), negativeassertBlock, false);
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},
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_waitForActionForPredicate: function(predicateBlock) {
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// Convert an isBlahBlah(target, value) function into a waitForBlahBlah(target, value) function.
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return function(target, value) {
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var terminationCondition = function () {
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try {
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return predicateBlock(target, value).isTrue;
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} catch (e) {
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// Treat exceptions as meaning the condition is not yet met.
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// Useful, for example, for waitForValue when the element has
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// not even been created yet.
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// TODO: possibly should rethrow some types of exception.
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return false;
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}
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};
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return Selenium.decorateFunctionWithTimeout(terminationCondition, this.defaultTimeout);
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};
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},
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_registerWaitForCommandsForPredicate: function(seleniumApi, baseName, predicateBlock) {
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// Register a waitForBlahBlah and waitForNotBlahBlah based on the specified accessor.
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var waitForActionMethod = this._waitForActionForPredicate(predicateBlock);
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var waitForActionBlock = fnBind(waitForActionMethod, seleniumApi);
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var invertedPredicateBlock = this._invertPredicate(predicateBlock);
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var waitForNotActionMethod = this._waitForActionForPredicate(invertedPredicateBlock);
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var waitForNotActionBlock = fnBind(waitForNotActionMethod, seleniumApi);
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this.registerAction("waitFor" + baseName, waitForActionBlock, false, true);
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this.registerAction("waitFor" + this._invertPredicateName(baseName), waitForNotActionBlock, false, true);
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//TODO decide remove "waitForNot.*Present" action name or not
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//for the back compatiblity issues we still make waitForNot.*Present availble
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this.registerAction("waitForNot" + baseName, waitForNotActionBlock, false, true);
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},
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_registerStoreCommandForAccessor: function(baseName, accessBlock, requiresTarget) {
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var action;
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if (requiresTarget) {
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action = function(target, varName) {
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storedVars[varName] = accessBlock(target);
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};
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} else {
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action = function(varName) {
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storedVars[varName] = accessBlock();
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};
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}
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this.registerAction("store" + baseName, action, false, true);
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}
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});
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function PredicateResult(isTrue, message) {
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this.isTrue = isTrue;
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this.message = message;
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}
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// NOTE: The CommandHandler is effectively an abstract base for
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// various handlers including ActionHandler, AccessorHandler and AssertHandler.
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// Subclasses need to implement an execute(seleniumApi, command) function,
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// where seleniumApi is the Selenium object, and command a SeleniumCommand object.
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function CommandHandler(type, haltOnFailure) {
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this.type = type;
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this.haltOnFailure = haltOnFailure;
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}
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// An ActionHandler is a command handler that executes the sepcified action,
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// possibly checking for alerts and confirmations (if checkAlerts is set), and
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// possibly waiting for a page load if wait is set.
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function ActionHandler(actionBlock, wait, dontCheckAlerts) {
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this.actionBlock = actionBlock;
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CommandHandler.call(this, "action", true);
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if (wait) {
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this.wait = true;
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}
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// note that dontCheckAlerts could be undefined!!!
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this.checkAlerts = (dontCheckAlerts) ? false : true;
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}
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ActionHandler.prototype = new CommandHandler;
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ActionHandler.prototype.execute = function(seleniumApi, command) {
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if (this.checkAlerts && (null == /(Alert|Confirmation)(Not)?Present/.exec(command.command))) {
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// todo: this conditional logic is ugly
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seleniumApi.ensureNoUnhandledPopups();
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}
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var terminationCondition = this.actionBlock(command.target, command.value);
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// If the handler didn't return a wait flag, check to see if the
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// handler was registered with the wait flag.
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if (terminationCondition == undefined && this.wait) {
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terminationCondition = seleniumApi.makePageLoadCondition();
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}
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return new ActionResult(terminationCondition);
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};
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function ActionResult(terminationCondition) {
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this.terminationCondition = terminationCondition;
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}
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function AccessorHandler(accessBlock) {
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this.accessBlock = accessBlock;
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CommandHandler.call(this, "accessor", true);
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}
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AccessorHandler.prototype = new CommandHandler;
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AccessorHandler.prototype.execute = function(seleniumApi, command) {
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var returnValue = this.accessBlock(command.target, command.value);
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return new AccessorResult(returnValue);
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};
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function AccessorResult(result) {
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this.result = result;
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}
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/**
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* Handler for assertions and verifications.
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*/
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function AssertHandler(assertBlock, haltOnFailure) {
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this.assertBlock = assertBlock;
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CommandHandler.call(this, "assert", haltOnFailure || false);
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}
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AssertHandler.prototype = new CommandHandler;
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AssertHandler.prototype.execute = function(seleniumApi, command) {
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var result = new AssertResult();
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try {
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this.assertBlock(command.target, command.value);
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} catch (e) {
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// If this is not a AssertionFailedError, or we should haltOnFailure, rethrow.
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if (!e.isAssertionFailedError) {
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throw e;
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}
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if (this.haltOnFailure) {
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var error = new SeleniumError(e.failureMessage);
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throw error;
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}
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result.setFailed(e.failureMessage);
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}
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return result;
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};
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function AssertResult() {
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this.passed = true;
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}
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AssertResult.prototype.setFailed = function(message) {
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this.passed = null;
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this.failed = true;
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this.failureMessage = message;
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}
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function SeleniumCommand(command, target, value, isBreakpoint) {
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this.command = command;
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this.target = target;
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this.value = value;
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this.isBreakpoint = isBreakpoint;
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}
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