在单元测试期间填充 Spring @Value [英] Populating Spring @Value during Unit Test

问题描述

我正在尝试为我的程序中用于验证表单的简单 bean 编写单元测试.bean 使用 @Component 进行注释，并具有使用

I'm trying to write a Unit Test for a simple bean that's used in my program to validate forms. The bean is annotated with @Component and has a class variable that is initialized using

@Value("${this.property.value}") private String thisProperty;

我想为这个类中的验证方法编写单元测试，但是，如果可能的话，我不想使用属性文件.这背后的原因是，如果我从属性文件中提取的值发生变化，我希望这不会影响我的测试用例.我的测试用例正在测试验证值的代码，而不是值本身.

I would like to write unit tests for the validation methods inside this class, however, if possible I would like to do so without utilizing the properties file. My reasoning behind this, is that if the value I'm pulling from the properties file changes, I would like that to not affect my test case. My test case is testing the code that validates the value, not the value itself.

有没有办法在我的测试类中使用 Java 代码来初始化一个 Java 类并在该类中填充 Spring @Value 属性，然后使用它进行测试?

Is there a way to use Java code inside my test class to initialize a Java class and populate the Spring @Value property inside that class then use that to test with?

我确实发现这个 How To 似乎很接近，但仍然使用属性文件.我宁愿这都是 Java 代码.

I did find this How To that seems to be close, but still uses a properties file. I would rather it all be Java code.

推荐答案

如果可能的话，我会尝试在没有 Spring Context 的情况下编写这些测试.如果你在没有 spring 的测试中创建这个类，那么你可以完全控制它的字段.

If possible I would try to write those test without Spring Context. If you create this class in your test without spring, then you have full control over its fields.

要设置 @value 字段，您可以使用 Springs ReflectionTestUtils - 它有一个方法 setField 设置私有字段.

To set the @value field you can use Springs ReflectionTestUtils - it has a method setField to set private fields.

@see JavaDoc: ReflectionTestUtils.setField(java.lang.Object, java.lang.String, java.lang.Object)

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