private File createTemporaryFolderIn()

in src/main/java/org/junit/rules/TemporaryFolder.java [232:251]

• 18 lines of code
• 3 McCabe index (conditional complexity)

    private File createTemporaryFolderIn(File parentFolder) throws IOException {
        File createdFolder = null;
        for (int i = 0; i < TEMP_DIR_ATTEMPTS; ++i) {
            // Use createTempFile to get a suitable folder name.
            String suffix = ".tmp";
            File tmpFile = File.createTempFile(TMP_PREFIX, suffix, parentFolder);
            String tmpName = tmpFile.toString();
            // Discard .tmp suffix of tmpName.
            String folderName = tmpName.substring(0, tmpName.length() - suffix.length());
            createdFolder = new File(folderName);
            if (createdFolder.mkdir()) {
                tmpFile.delete();
                return createdFolder;
            }
            tmpFile.delete();
        }
        throw new IOException("Unable to create temporary directory in: "
            + parentFolder.toString() + ". Tried " + TEMP_DIR_ATTEMPTS + " times. "
            + "Last attempted to create: " + createdFolder.toString());
    }