20130515-Grails In Action-3、建模(01小节)

内容简介

• 什么是GORM，以及GORM怎么工作
• 定义领域模型
• 怎么让模型工作，如save、update
• 验证和约束
• 领域类的关系（1:1,1:m,m:n）

开始我们的实例程序:hubbub

目标：建立domain对象，增加属性，以及集成测试

1、创建项目

grails create-app hubbub

2、创建第一个domain对象

grails create-domain-class com.grailsinaction.User

3、给User对象添加属性

package com.grailsinaction

class User {
    
    String userId
    String password
    String homepage
    Date dateCreated

    static constraints = {
    }
}

 4、对User对象进行集成测试

grails create-integration-test com.grailsinaction.UserIntegration

5、增加测试代码

package com.grailsinaction

import static org.junit.Assert.*
import org.junit.*

class UserIntegrationTests {

    @Before
    void setUp() {
        // Setup logic here
    }

    @After
    void tearDown() {
        // Tear down logic here
    }

    @Test
    void testFirstSaveEver() {
        def user = new User(userId: 'joe', password: 'secret', homepage: 'http://www.grailsinaction.com')
        assertNotNull user.save()
        assertNotNull user.id
        def foundUser = User.get(user.id)
        assertEquals 'joe', foundUser.userId
    }
}

6、运行集成测试

grails test-app -integration

7、测试结果

| Running 1 integration test... 1 of 1
| Completed 1 integration test, 0 failed in 2218ms
| Tests PASSED - view reports in E:\example\grails\hubbub_03\target\test-reports

8、User对象保存和更新测试

在com.grailsinaction.UserIntegration中增加测试代码

    @Test
    void testSaveAndUpdate() {
        def user = new User(userId: 'joe', password: 'secret', homepage: 'http://www.grailsinaction.com')
        assertNotNull user.save()
        def foundUser = User.get(user.id)
        foundUser.password = 'sesame'
        foundUser.save()
        def editedUser = User.get(user.id)
        assertEquals 'sesame', editedUser.password
    }

9、再运行、查看测试结果

| Running 2 integration tests... 1 of 2
| Running 2 integration tests... 2 of 2
| Completed 2 integration tests, 0 failed in 2562ms
| Tests PASSED - view reports in E:\example\grails\hubbub_03\target\test-reports

10、User对象保存、删除测试

    @Test
    void testSaveThenDelete() {
        def user = new User(userId: 'joe', password: 'secret', homepage: 'http://www.grailsinaction.com')
        assertNotNull user.save()
        def foundUser = User.get(user.id)
        foundUser.delete()
        assertFalse User.exists(foundUser.id)
    }