为基于Spring的REST API编写Junit测试用例

Question

For Spring based Rest API, in order to write JUnit test cases, do I need an established database connection or can i have a mock database. Can I get some suggestions.

Technology Stack used si: Spring MVC, Hibernate

Answer 1

Under your root-context.xml you may consider setting up different bean profiles. For example:

<beans profile="dev">
    <bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://192.168.1.2:3306/mydb"/>
        <property name="username" value="admin"/>
        <property name="password" value="password"/>
        <property name="initialSize" value="3"/>
    </bean>
    ...
</beans>
...
<beans profile="prod">
    <bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://192.168.1.3:3306/mydb"/>
        <property name="username" value="admin"/>
        <property name="password" value="password"/>
        <property name="initialSize" value="3"/>
    </bean>
    ...
</beans>

And then under your JUnit tests you may consider using the @Profile annotation above your tests:

@Profile(value="dev")

Alternatively, you may set the spring.profiles.active environment property in your application.properties file or as a launch configuration for your application server via -Dspring.profiles.active=dev

For more information, you may read the Spring docs on Profiles .

Answer 2

It depends, on what you are testing. If you are testing the service layer, you should not establish actual connections to the database. Instead, you can mock up repository objects, using Mockito, for example. Here is an example of how to wire up mock Repository objects.

If you want to test you data access logic, you might consider using in memory database like hsqldb and define it as a test data source in test configuration.

For more sofisticated, integration testing, you might want to connect to the actual database