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use serde_json::Value;
use serde_json::json;
use super::JSONRPCError;
use super::JSONRPCErrorError;
use super::JSONRPCMessage;
use super::JSONRPCNotification;
use super::JSONRPCRequest;
use super::JSONRPCResponse;
use super::MAX_JSONRPC_VALUE_NODES;
use super::RequestId;
use super::SERDE_JSON_RAW_VALUE_TOKEN;
#[test]
fn round_trips_every_jsonrpc_message_variant() -> serde_json::Result<()> {
let messages = [
JSONRPCMessage::Request(JSONRPCRequest {
id: RequestId::Integer(1),
method: "request".to_string(),
params: Some(json!({"items": [1, 2, 3]})),
trace: None,
}),
JSONRPCMessage::Notification(JSONRPCNotification {
method: "notification".to_string(),
params: Some(json!({"enabled": true})),
}),
JSONRPCMessage::Response(JSONRPCResponse {
id: RequestId::String("response".to_string()),
result: json!({"value": "ok"}),
}),
JSONRPCMessage::Error(JSONRPCError {
error: JSONRPCErrorError {
code: -32603,
data: Some(json!({"retryable": false})),
message: "failed".to_string(),
},
id: RequestId::Integer(2),
}),
];
for expected in messages {
let encoded = serde_json::to_string(&expected)?;
let actual = serde_json::from_str::<JSONRPCMessage>(&encoded)?;
assert_eq!(actual, expected);
}
Ok(())
}
#[test]
fn round_trips_arbitrary_precision_numbers() -> serde_json::Result<()> {
let encoded = r#"{"method":"numbers","params":{"decimal":1.5,"exponent":1e100,"largeInteger":18446744073709551616}}"#;
let expected = serde_json::from_str::<Value>(encoded)?;
let message = serde_json::from_str::<JSONRPCMessage>(encoded)?;
let actual = serde_json::to_value(message)?;
assert_eq!(actual, expected);
Ok(())
}
#[test]
fn applies_value_limit_to_raw_value_wrapper() -> serde_json::Result<()> {
let encoded =
format!(r#"{{"method":"raw","params":{{"{SERDE_JSON_RAW_VALUE_TOKEN}":"[0,1]"}}}}"#);
let actual = serde_json::from_str::<JSONRPCMessage>(&encoded)?;
let expected = JSONRPCMessage::Notification(JSONRPCNotification {
method: "raw".to_string(),
params: Some(json!([0, 1])),
});
assert_eq!(actual, expected);
let mut wrapped = String::with_capacity(2 * MAX_JSONRPC_VALUE_NODES + 1);
wrapped.push('[');
for index in 0..MAX_JSONRPC_VALUE_NODES {
if index != 0 {
wrapped.push(',');
}
wrapped.push('0');
}
wrapped.push(']');
let encoded =
format!(r#"{{"method":"raw","params":{{"{SERDE_JSON_RAW_VALUE_TOKEN}":"{wrapped}"}}}}"#);
let error = serde_json::from_str::<JSONRPCMessage>(&encoded)
.expect_err("raw value wrapper should not bypass the JSON value limit");
let expected_error = format!("exceeds the limit of {MAX_JSONRPC_VALUE_NODES} JSON values");
assert!(
error.to_string().contains(&expected_error),
"unexpected error: {error}"
);
Ok(())
}
#[test]
fn accepts_large_scalar_payload() -> serde_json::Result<()> {
let expected = JSONRPCMessage::Notification(JSONRPCNotification {
method: "large".to_string(),
params: Some(json!({"data": "x".repeat(MAX_JSONRPC_VALUE_NODES + 1)})),
});
let encoded = serde_json::to_string(&expected)?;
let actual = serde_json::from_str::<JSONRPCMessage>(&encoded)?;
assert_eq!(actual, expected);
Ok(())
}
#[test]
fn rejects_duplicate_object_keys() {
let error = serde_json::from_str::<JSONRPCMessage>(r#"{"method":"safe","method":"dangerous"}"#)
.expect_err("duplicate JSON object keys should be rejected");
assert!(
error
.to_string()
.contains("duplicate JSON object key `method`"),
"unexpected error: {error}"
);
}
#[test]
fn rejects_compact_array_heap_amplification() {
const REPRO_VALUE_COUNT: usize = 2_097_137;
const REPRO_MESSAGE_BYTES: usize = 4_194_303;
let mut encoded = String::with_capacity(REPRO_MESSAGE_BYTES);
encoded.push_str(r#"{"method":"probe","params":["#);
for index in 0..REPRO_VALUE_COUNT {
if index != 0 {
encoded.push(',');
}
encoded.push('0');
}
encoded.push_str("]}");
assert_eq!(encoded.len(), REPRO_MESSAGE_BYTES);
let error = serde_json::from_str::<JSONRPCMessage>(&encoded)
.expect_err("amplification payload should exceed the JSON value limit");
let expected_error = format!("exceeds the limit of {MAX_JSONRPC_VALUE_NODES} JSON values");
assert!(
error.to_string().contains(&expected_error),
"unexpected error: {error}"
);
}
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