grails - Grails集成测试案例中的Mock CommonsMultipartFile

Question

我有一个接受CommonsMultipartFile并将其上传到服务器的服务方法

class ExampleService() {
    def saveFile(CommonsMultipartFile file) {
        // some validation code for file
    }
}

尝试同时使用 MockMultipartHttpServletRequest和 GrailsMockMultipartFile。

如果 MockMultipartHttpServletRequest出现错误，则为:

|  org.codehaus.groovy.runtime.typehandling.GroovyCastException: 
Cannot cast object 'org.springframework.mock.web.MockMultipartFile@2f39360' 
with class 'org.springframework.mock.web.MockMultipartFile' to 
class 'org.springframework.web.multipart.commons.CommonsMultipartFile'

GrailsMockMultipartFile也会出现以下错误:

|  org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot 
cast object 'org.codehaus.groovy.grails.plugins.testing.GrailsMockMultipartFile@1022f0bd' 
with class 'org.codehaus.groovy.grails.plugins.testing.GrailsMockMultipartFile' to 
class 'org.springframework.web.multipart.commons.CommonsMultipartFile'

提到了这个 stack overflow question。

我应该如何模拟 CommonsMultipartFile并将其作为参数传递给测试用例？

解决方案

我找到解决方法，请检查我的 answer

Answer 1

经过不同的堆栈溢出链接和CommonsMultipartFile JDK之后，我想出了这个解决方案

如果我使用错误的方法，请告诉我@burtbeckwith

File getTestFile(String fileName = "") {
    //Code which create file instance 
}

// Inside my test case I have created CommonsMultipartFile test file and used it.
DiskFileItemFactory factory = new DiskFileItemFactory()
FileItem fileItem = factory.createItem( "file", "multipart/form-data", false, "logo.png" )
IOUtils.copy(new FileInputStream(getTestFile()), fileItem.getOutputStream())
CommonsMultipartFile testFile = new CommonsMultipartFile(fileItem)