Junit参数化测试方法（四）

       本文将描述Feed4Junit测试数据来自数据库的情况：

一、Feed4Junit官方地址：

http://databene.org/feed4junit.html

Retrieving test data from a database

Databases can be declared and configured with a @Database annotation. When applying the annotation to a class, the defined database is available to all test methods. When annotating a method, the database is available only in this method. A basic configuration can be performed by specifying the typical JDBC connection settings: url, driver, user,password. The database declaration must specify an id, by which the database can be referred to as @Source of a method. The @Source annotation must refer to the database idand define a SQL query as selector. The number of query result columns must match the number of method parameters:

@RunWith(Feeder.class)
@Database(id = "db", url = "jdbc:hsqldb:hsql://localhost:9001/f4jdb", 
        driver = "org.hsqldb.jdbcDriver", user = "me", password = "secret")
public class DatabaseTest {  
    static DBSystem db;
    
    @Test
    @Source(id = "db", selector = "select id, name from dbt_person")
    public void test(int id, String name) {
        System.out.println(id + ", " + name);
    }
    
}

Alternatively to the explicit database connection configuration, you can place database environment configurations in your user directory and refer to them in the test:

@Database(id = "db", environment = "f4jdb") 

Read more about environment files in the DB Sanity environment files documentation.

Environment Files 

An environment file carries the identifier of the environment in its name: An environment 'mydb' is configured in a properties file 'mydb.env.properties'. The environment name is the only required argument for command line execution of DB Sanity.

The related properties file first is searched in the current working directory. If it is not found there, DB Sanity looks up the environment in a central configuration directory below your user's home directory: $USER.HOME/databene/. This way you do not need to copy environment files for each DBSanity project you are using and can reuse them in other Databene applications like Benerator. You can as well specify an environment name that refers to another directory. For example, an environment name 'config/test' refers to a file'config/test.env.properties'.

In the file, you need to specify details for connecting your database with a JDBC driver:

Name	Description
db_url	JDBC URL of the database	required
db_driver	Java class name of the JDBC driver	required
db_user	user name for database login	optional
db_password	password for database login	optional
db_catalog	the (JDBC) catalog to use	optional
db_schema	the (JDBC) schema to use	optional

If you are not familiar with JDBC, you can look up driver archive names, class names and url formats in a table in the Benerator documentation: http://databene.org/databene-benerator/116-my-first-ide-and-maven-based-benerator-project.html.

二、示例

1、@Database注释在类头部：

package JunitTestSample0001;

import org.databene.benerator.anno.Database;
import org.databene.benerator.anno.Source;
import org.databene.feed4junit.Feeder;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
@RunWith(Feeder.class)
@Database(
        id = "DEEJdb",   
        url = "jdbc:oracle:thin:@zs-PC:1521:ytdf",   
        driver = "oracle.jdbc.driver.OracleDriver",   
        user = "deejuser",   
        password = "deejuser") 
public class JunitTest0001 {
    @Test
    @Source(id = "DEEJdb", selector = "select packagsn from product")
    public void test(String packagsn, String resultInfo) {
        System.out.println("-------------");
        Assert.assertEquals(packagsn, packagsn);
    }
}

运行失败，空指针异常：

 

2、@Database注释在方法：

package JunitTestSample0001;

import org.databene.benerator.anno.Database;
import org.databene.benerator.anno.Source;
import org.databene.feed4junit.Feeder;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(Feeder.class)
@Database(id = "DEEJdb", environment = "DEEJdb")  
public class JunitTest0001 {
    @Test
    @Source(id = "DEEJdb", selector = "select packagsn from product")
    public void test(String packagsn, String resultInfo) {
        System.out.println("-------------");
        Assert.assertEquals(packagsn, packagsn);
    }
}

运行失败，空指针异常：

 

3、@Database注释基于配置文件的方式：

1）文件名称：DEEJdb.env.properties

    格式：Database的注解属性中environment+“env.properties”

    内容如下：

db_url=jdbc:oracle:thin:@zs-PC:1521:ytdf
db_driver=oracle.jdbc.driver.OracleDriver
db_user=deejuser
db_password=deejuser

2）放置在在项目src的统计目录下（文件必须是同级别的下文件）