def write_image_test_data(d):
    from oe.data import export2json

    deploy_dir = d.getVar('IMGDEPLOYDIR')
    link_name = d.getVar('IMAGE_LINK_NAME')
    testdata_name = os.path.join(deploy_dir, "%s.testdata.json" % d.getVar('IMAGE_NAME'))

    searchString = "%s/"%(d.getVar("TOPDIR")).replace("//","/")
    export2json(d, testdata_name, searchString=searchString, replaceString="")

    if os.path.exists(testdata_name) and link_name:
        testdata_link = os.path.join(deploy_dir, "%s.testdata.json" % link_name)
        if testdata_link != testdata_name:
            if os.path.lexists(testdata_link):
                os.remove(testdata_link)
            os.symlink(os.path.basename(testdata_name), testdata_link)

write_image_test_data(d)