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The Commons Jexl library is an implementation of the JSTL Expression Language with extensions. This was customized by nmondal.
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/**
 * Copyright 2015 Nabarun Mondal
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.noga.njexl.testing.ui;

import com.noga.njexl.lang.JexlContext;
import com.noga.njexl.lang.JexlEngine;
import com.noga.njexl.lang.Script;
import com.noga.njexl.testing.TestAssert;
import com.noga.njexl.testing.TestSuite;
import com.noga.njexl.testing.TestSuiteRunner;
import java.io.File;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

/**
 * Created by noga on 17/04/15.
 */
public class WebSuiteRunner extends TestSuiteRunner {

    public final WebTestSuite webTestSuite ;

    public XSelenium xSelenium ;

    protected Script before;

    protected Script script ;

    protected Script after;

    protected TestAssert testAssert;

    protected JexlContext jexlContext ;

    protected HashMap functions;

    protected JexlContext getContext(){
        JexlContext context = com.noga.njexl.lang.Main.getContext();
        context.set(Script.ARGS, new Object[]{});
        context.set(XSelenium.SELENIUM_VAR, xSelenium);
        context.set(Script.ARGS, new Object[]{});
        context.set(TestAssert.ASSERT_VAR, testAssert);
        return context;
    }

    protected HashMap getFunctions(){
        HashMap functions = com.noga.njexl.lang.Main.getFunction(jexlContext);
        functions.put(XSelenium.SELENIUM_NS, xSelenium);
        functions.put(TestAssert.ASSERT_NS, testAssert);
        return functions ;
    }

    public WebSuiteRunner(String file, Map variables) throws Exception {
        super(variables);
        webTestSuite = WebTestSuite.loadFrom(file,variables);
    }

    public WebSuiteRunner(String file) throws Exception {
        this(file, Collections.EMPTY_MAP);
    }


    /**
     * Sets up variable for local context
     * @param local the local context
     * @param runEvent run event, which encapsulates the data source
     */
    public void setLocalContext(JexlContext local, TestRunEvent runEvent){
        String[] columns = runEvent.table.row(0);
        String[] values = runEvent.table.row(runEvent.row);
        // put into context
        for ( int i = 0 ; i < columns.length;i++ ){
            local.set(columns[i],values[i]);
        }
    }

    @Override
    protected TestSuite testSuite() {
        return webTestSuite;
    }

    @Override
    protected void prepare() throws Exception {

        if (webTestSuite.remoteConfig.isEmpty() ){
            xSelenium = XSelenium.selenium(webTestSuite.webApp.url, webTestSuite.browserType );
        }else{
            xSelenium = XSelenium.selenium(webTestSuite.webApp.url, webTestSuite.remoteConfig );
        }

        testAssert = new TestAssert();
        testAssert.eventListeners.add(xSelenium);
        testAssert.eventListeners.addAll(reporters);
    }

    @Override
    protected TestSuite.Application application() {
        return webTestSuite.webApp ;
    }

    @Override
    protected String logLocation(String base, TestSuite.Feature feature) {
        String loc = webTestSuite.webApp.logs + "/" + base +"/" + feature.name ;
        File file = new File(loc);
        if ( !file.exists() ){
            file.mkdirs();
        }
        if ( xSelenium != null ) {
            xSelenium.screenShotDir(loc);
        }
        return loc;
    }

    @Override
    protected void afterFeature(TestSuite.Feature feature) throws Exception {
        jexlContext = null;
        functions.clear();
        functions = null;
        before = null;
        script = null;
        after = null;
    }

    protected void createScripts(JexlEngine engine, TestSuite.Feature feature) throws Exception{
        if ( !feature.script.isEmpty() ) {
            String scriptLocation = webTestSuite.webApp.scriptDir + "/" + feature.script;
            script = engine.importScript(scriptLocation);
        }if ( !feature.beforeScript.isEmpty() ) {
            String scriptLocation = webTestSuite.webApp.scriptDir + "/" + feature.beforeScript;
            before = engine.importScript(scriptLocation);
        }if ( !feature.afterScript.isEmpty() ) {
            String scriptLocation = webTestSuite.webApp.scriptDir + "/" + feature.afterScript;
            after = engine.importScript(scriptLocation);
        }
    }

    @Override
    protected void beforeFeature(TestSuite.Feature feature) throws Exception {

        jexlContext = getContext();
        functions = getFunctions();
        JexlEngine engine = new JexlEngine();
        engine.setFunctions(functions);
        createScripts(engine,feature);
    }

    @Override
    protected TestRunEvent runTest(TestRunEvent runEvent) throws Exception {
        testAssert.clearError();
        JexlContext local = jexlContext.copy();
        setLocalContext(local,runEvent);
        // set output if need be?
        runEvent.runObject = script.execute(local);

        if (testAssert.hasError()){
            runEvent.type = TestRunEventType.ERROR_TEST ;
        }else {
            runEvent.type = TestRunEventType.OK_TEST;
        }
        return runEvent ;
    }

    @Override
    protected void shutdown() throws Exception {
        xSelenium.close();
        xSelenium = null;
        testAssert.eventListeners.clear();
        testAssert = null;
    }
}