[FIXED] What values to put in my properties file to get an IOException while loading?

Issue

I am reading a file from its classpath in Java project.

Sample Code:

      public static Properties loadPropertyFile(String fileName) {
        Properties properties = new Properties();    
        InputStream inputStream = PropertyReader.class.getClassLoader().getResourceAsStream(fileName);

        if (inputStream != null) {
            try {
                properties.load(inputStream);
            } catch (IOException e) {
                e.printStackTrace();
            }
        } else {
            throw new Exception("Property file: [" + fileName + "] not found in the classpath");
        }
        return properties;
      }

It's working fine. I am writing Junit tests for this code. How can I create a scenario for IOException in properties.load(inputStream)?

What values should I put in my properties.file to get IOException?

Solution

Have you considered a mocking framework? Mock the new operator for Properties to return a mock implementation that throws IOException when its load method is called.

mockitio and powermockito will allow you to do this.

Answered By - DaveH
Answer Checked By - Gilberto Lyons (JavaFixing Admin)