How to convert InputStream to FilePart?

Question

I'm trying to test this simple function, that receive a file from controller and extract emails from it.

    fun extractEmailsFromFile(file: Mono<FilePart>, emailsPerFileLimit: Int): Flux<String> {
        return file
                .flatMap { readFileContent(it) }
                .flatMapMany { textContent -> extractAndValidateEmails(textContent, emailsPerFileLimit) }
    }

To do the unit test, I want to put a file on resource folder and read it. How can i convert this inputStream:

javaClass.getResourceAsStream("/upload/emails.csv")

in a FilePart to pass as parameter in my test?

Answer 1

You can try this line:

getClass().getClassLoader().getResourceAsStream("upload/emails.csv")

Besides, in a unit test using JUnit, you can use TemporaryFolder rule to create temporary folders and files if necessary. It's quite useful. For more info: https://junit.org/junit4/javadoc/4.12/org/junit/rules/TemporaryFolder.html