AT_CHECK(
[[test-jsonrpc request unix:socket echo '[{"a": "b", "x": null}]']], [0],
[[{"error":null,"id":0,"result":[{"a":"b","x":null}]}
AT_CHECK(
[[test-jsonrpc request unix:socket echo '[{"a": "b", "x": null}]']], [0],
[[{"error":null,"id":0,"result":[{"a":"b","x":null}]}