Tapestry5单元测试

我们另一个方面可以测试模板文件，模板文件就是HTML文件，在HTML文件中可能涉及到测试：
*页面字段显示测试
*测试link动作
*测试表单提交form

1. 页面字段显示测试
在我们第1章的Start模板主要是断言显示“Hello World!”字符串。测试程序如清单2.5所示。

package com.kingbegin.web.pages;

import org.apache.tapestry.dom.Document;
import org.apache.tapestry.test.PageTester;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

public class StartTemplateTest {

    PageTester tester;
    Document doc;

    @Before
    public void setUp() throws Exception {

        String appPackage = "com.kingbegin.web";
        String appName = "App"; // IoC中Modeule名字，默认AppModule.java。
        tester = new PageTester(appPackage, appName, "WebRoot");
        doc = tester.renderPage("Start");
    }

    @Test
    public void testGetMessage() {
        String message = doc.getElementById("label1").getChildMarkup().trim();
        Assert.assertEquals(message, "Hello World!");
    }

}

 
PageTester对象是一个测试辅助类，实例化PageTester对象需要三个参数：appPackage是应用程序的基本包、appName是IoC容器的Modeule名字默认AppModule.java，我们的案例中没有Modeule，所以它的默认App、"WebRoot"是模板文件所在的位置。renderPage方法是模拟呈现页面得到一个Document对象，XHTML文件可以看成是一个XML文档，Document对象就是整个的页面，Document的getElementById("label1")方法可以帮助我们获得id为"label1"的Element对象，再调用getChildMarkup()可以获得元素中的内容，因为返回的内容可能还有回车和空格，所以还要调用trim()方法。最后断言label1中的内容为"HelloWorld！"。

tapestry-test-5.0.11.jar

If the page requires a context, you can pass it this way:
public class MyTest extends Assert
{
    @Test
    public void test1()
    {
        String appPackage = "org.example.app";
        String appName = "LocaleApp";
        PageTester tester = new PageTester(appPackage, appName, "src/main/webapp");
        Object[] context = new Object[]{ "abc", 123 };
        Document doc = tester.invoke(new ComponentInvocation(new PageLinkTarget("MyPage"), context));
        assertEquals(doc.getElementById("id1").getChildText(), "hello");
    }
}

http://tapestry.apache.org/tapestry5/tapestry-core/guide/unit-testing-pages.html
Testing an action link
After rendering a page, you may want to "click" on an action link and then assert against the resulting page. You can do it this way:

public class MyTest extends Assert
{
    @Test
    public void test1()
    {
        String appPackage = "org.example.app";
        String appName = "LocaleApp";
        PageTester tester = new PageTester(appPackage, appName, "src/main/webapp");
        Document doc = tester.renderPage("MyPage");
        Element link = doc.getElementById("link1");
        doc = tester.clickLink(link);
        assertTrue(doc.toString().contains("abc"));
    }
}

Testing a form submission
After rendering a page, you may want to fill out a form, submit it and then inspect the resulting page. You can do it this way:

public class MyTest extends Assert
{
    @Test
    public void test1()
    {
        String appPackage = "org.example.app";
        String appName = "LocaleApp";
        PageTester tester = new PageTester(appPackage, appName, "src/main/webapp");
        Document doc = tester.renderPage("MyPage");
        Element form = doc.getElementById("form1");
        Map<String, String> fieldValues = new HashMap<String, String>();
        fieldValues.put("field1", "hello");
        fieldValues.put("field2", "100");
        doc = tester.submitForm(form, fieldValues);
        assertTrue(doc.toString().contains("abc"));
    }
}

To submit a form by clicking a submit button, call the clickSubmit() method instead.
Unit testing a component
To unit test a component, just create a test page containing that component. Then unit test that page.