Implemented sample test case to present problem with HtmlUnit 2.8 and not execut…

…ing script that came in ajax response.

+package pl.labno.bernard.htmlunified;
+
+import com.gargoylesoftware.htmlunit.BrowserVersion;
+import com.gargoylesoftware.htmlunit.NicelyResynchronizingAjaxController;
+import com.gargoylesoftware.htmlunit.WebClient;
+import com.gargoylesoftware.htmlunit.html.DomNodeList;
+import com.gargoylesoftware.htmlunit.html.HtmlElement;
+import com.gargoylesoftware.htmlunit.html.HtmlPage;
+import junit.framework.Assert;
+import junit.framework.AssertionFailedError;
+import org.junit.Test;
+
+import java.io.IOException;
+
+public class ReRenderedJavaScriptTest {
+
+    /**
+     * This test checks if results can be paginated properly.
+     * On first page there are 6 people and datascroller.
+     * After clicking page 2 the results should be re-rendered with
+     * response from ajax request. Datascroller should also be re-rendered.
+     * In order for datascroller to work the javascript that is rendered below it
+     * should be evaluated.
+     * This test fails cause HtmlUnit has problems with script elements from XHttpRequest
+     */
+    @Test(expected = AssertionFailureCaughtException.class)
+    public void testPagination() throws IOException {
+        final WebClient client = new WebClient(BrowserVersion.FIREFOX_3_6);
+        client.setAjaxController(new NicelyResynchronizingAjaxController());
+        HtmlPage page = client.getPage("http://mamywladze.pl/ludzie");
+        HtmlElement table = page.getElementById("filterForm:j_id101:j_id113_table");
+        Assert.assertNotNull(table);
+        DomNodeList<HtmlElement> cells = table.getElementsByTagName("td");
+        Assert.assertNotNull(cells);
+        Assert.assertEquals(5, cells.size());
+        /**
+         * Current page has rich-datascr-act style class.
+         */
+        String styleClass = cells.get(0).getAttribute("class");
+        Assert.assertNotNull(styleClass);
+        Assert.assertTrue("Page 1 is not the current page", styleClass.contains("rich-datascr-act"));
+        final HtmlElement cell2 = cells.get(1);
+        Assert.assertNotNull(cell2);
+        new RequestResponseLogger(client);
+        /**
+         * Now this click will trigger ajax request which response will be used to update results and datascroller.
+         */
+        cell2.click();
+        /**
+         * Notice that output of following line should contain this:
+         * <script type="text/javascript">
+         * //<![CDATA[
+         * //
+         * //]]>
+         * </script>
+         * Its cause HtmlScript contains 3 children in stead of 1 and HtmlScript class uses only first child
+         * Child 1:
+         * //
+         * Child 2:
+         * Event.observe('filterForm:j_id101:j_id113', 'rich:datascroller:onscroll', function(event){A4J.AJAX.Submit('_viewRoot','filterForm',event,{'ignoreDupResponses':true,'parameters':{'filterForm:j_id101:j_id113':event.memo.page} ,'eventsQueue':'filterForm:j_id101:j_id113','actionUrl':'/ludzie'} ); return false;});
+         *
+         * Child 3:
+         * //
+         *
+         * And actual part of Xhttp response was:
+         * <script type="text/javascript">//<![CDATA[
+         * Event.observe('filterForm:j_id101:j_id113', 'rich:datascroller:onscroll', function(event){A4J.AJAX.Submit('_viewRoot','filterForm',event,{'ignoreDupResponses':true,'parameters':{'filterForm:j_id101:j_id113':event.memo.page} ,'eventsQueue':'filterForm:j_id101:j_id113','actionUrl':'/ludzie'} ); return false;});
+         * //]]>
+         * </script>
+         *
+         * It is fault of the parser that splits script's contents into 3 child nodes. It happends both in HtmlUnit and in FireFox. So i guess it is the nature
+         * of parser.
+         */
+        System.out.println(page.getElementById("filterForm:personList").asXml());
+        table = page.getElementById("filterForm:j_id101:j_id113_table");
+        Assert.assertNotNull(table);
+        cells = table.getElementsByTagName("td");
+        Assert.assertNotNull(cells);
+        Assert.assertEquals(6, cells.size());
+        styleClass = cells.get(2).getAttribute("class"); //If you wonder why 2 in stead of 1, it's cause there is extra cell that navigates to the start
+        Assert.assertNotNull(styleClass);
+        Assert.assertTrue("Page 2 is not the current page", styleClass.contains("rich-datascr-act"));
+
+        /**
+         * This click however will not trigger ajax request cause script that was binding appropriate event listeners was not executed.
+         * (it came from previous ajax request)
+         */
+        cells.get(1).click();
+
+        System.out.println(page.getElementById("filterForm:personList").asXml());
+        table = page.getElementById("filterForm:j_id101:j_id113_table");
+        Assert.assertNotNull(table);
+        cells = table.getElementsByTagName("td");
+        Assert.assertNotNull(cells);
+        /**
+         * This assertion should fail.
+         */
+        try {
+            Assert.assertEquals(5, cells.size());
+        } catch (AssertionFailedError e) {
+            throw new AssertionFailureCaughtException();
+        }
+        styleClass = cells.get(0).getAttribute("class");
+        Assert.assertNotNull(styleClass);
+        Assert.assertTrue("Page 2 is not the current page", styleClass.contains("rich-datascr-act"));
+    }
+
+    /**
+     * This test is the same as testPagination but should pass cause it uses my nice hack.
+     */
+    @Test
+    public void testPaginationSuccessfully() throws IOException {
+        final WebClient client = new WebClient(BrowserVersion.FIREFOX_3_6);
+        client.setAjaxController(new NicelyResynchronizingAjaxController());
+        HtmlPage page = client.getPage("http://mamywladze.pl/ludzie");
+        HtmlElement table = page.getElementById("filterForm:j_id101:j_id113_table");
+        Assert.assertNotNull(table);
+        DomNodeList<HtmlElement> cells = table.getElementsByTagName("td");
+        Assert.assertNotNull(cells);
+        Assert.assertEquals(5, cells.size());
+        /**
+         * Current page has rich-datascr-act style class.
+         */
+        String styleClass = cells.get(0).getAttribute("class");
+        Assert.assertNotNull(styleClass);
+        Assert.assertTrue("Page 1 is not the current page", styleClass.contains("rich-datascr-act"));
+        final HtmlElement cell2 = cells.get(1);
+        Assert.assertNotNull(cell2);
+        new RequestResponseLogger(client);
+        /**
+         * Now this click will trigger ajax request which response will be used to update results and datascroller.
+         */
+        cell2.click();
+
+        System.out.println(page.getElementById("filterForm:personList").asXml());
+        table = page.getElementById("filterForm:j_id101:j_id113_table");
+        Assert.assertNotNull(table);
+        cells = table.getElementsByTagName("td");
+        Assert.assertNotNull(cells);
+        Assert.assertEquals(6, cells.size());
+        styleClass = cells.get(2).getAttribute("class"); //If you wonder why 2 in stead of 1, it's cause there is extra cell that navigates to the start
+        Assert.assertNotNull(styleClass);
+        Assert.assertTrue("Page 2 is not the current page", styleClass.contains("rich-datascr-act"));
+
+        /**
+         * This click however will not trigger ajax request cause script that was binding appropriate event listeners was not executed.
+         * (it came from previous ajax request)
+         */
+        cells.get(1).click();
+
+        /**
+         * Here is the hack.
+         */
+        WebClientUtils.executeAjaxReRenderedScripts(page);
+
+        System.out.println(page.getElementById("filterForm:personList").asXml());
+        table = page.getElementById("filterForm:j_id101:j_id113_table");
+        Assert.assertNotNull(table);
+        cells = table.getElementsByTagName("td");
+        Assert.assertNotNull(cells);
+        /**
+         * This time the assertion should be ok
+         */
+        Assert.assertEquals(5, cells.size());
+        styleClass = cells.get(0).getAttribute("class");
+        Assert.assertNotNull(styleClass);
+        Assert.assertTrue("Page 2 is not the current page", styleClass.contains("rich-datascr-act"));
+    }
+
+    public class AssertionFailureCaughtException extends RuntimeException {
+    }
+}