CODEWITHSUNDEEP
java
CrazySabbath
CrazySabbath

Reputation: 1334

ClassLoader Resource not found from UnitTest

I have a class method that reads resource file, but file can not be find when I'm trying to run this class with unit tests.

If I were to deploy application war or just run it from eclipse using maven, everything works just fine.

File locations (not sure if src/test/resources is needed, added it only after I encountered the problem, did not help though):

src/main/resources/
    -> com
        -> xxxx
            -> xxxx_portal
                -> web
                    -> server
                        -> servlet
                            -> reports -> Logo.png
src/test/resources/
    -> com
        -> xxxx
            -> xxxx_portal
                -> web
                    -> server
                        -> servlet
                            -> reports -> Logo.png

Relevant class code:

package com.xxxx.xxxx_portal.web.server.servlet.reports;

public class ModuleReports {
    private static final String LOGO_IMAGE_PATH = "/com/xxxx/xxxx_portal/web/server/servlet/reports/Logo.png";

    ...
    private static InputStream getLogoImage() {
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        InputStream is = classLoader.getResourceAsStream(LOGO_IMAGE_PATH); //Problem here, InputStream is null. It should not be null.
        return is;
    }
    ...
}

Upvotes: 0

Views: 875

Answers (1)

VGR
VGR

Reputation: 44404

The argument to ClassLoader.getResourceAsStream must not start with a slash (/). While you could just remove the initial slash from the value of ACDLABS_LOGO_IMAGE_PATH, you should use Class.getResourceAsStream rather than ClassLoader.getResourceAsStream:

private static InputStream getLogoImage() {
    return ModuleReports.class.getResourceAsStream("ACDLogo.png");
}

Unlike ClassLoader.getResourceAsStream, the argument to Class.getResourceAsStream can start with a slash, but doesn’t need to. If it doesn’t, the string is assumed to point to a resource in the same package as the class on which it is invoked. All of this behavior is described in the documentation.

Upvotes: 1

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