testcase_job2str
s = testcase_job2str(solv->pool, solv->job.elements[-intid - 1], solv->job.elements[-intid]);
s = pool_tmpjoin(pool, solprefix, " deljob ", testcase_job2str(pool, solv->job.elements[op - 1], solv->job.elements[op]));
cmd = (char *)testcase_job2str(pool, solv->job.elements[i], solv->job.elements[i + 1]);
extern const char *testcase_job2str(Pool *pool, Id how, Id what);