add test for test signature endpoint

tests/common/mock_server/mod.rs

@@ -319,6 +319,10 @@ impl TrueLayerMockServer {
                     web::resource("/payments-provider-return")
                         .route(web::post().to(routes::submit_provider_return_parameters)),
                 )
+                .service(
+                    web::resource("/v1/test-signature")
+                        .route(web::post().to(routes::test_signature)),
+                )
         })
         .workers(1)
         .bind("127.0.0.1:0")

tests/common/mock_server/routes.rs

@@ -7,7 +7,7 @@ use crate::common::mock_server::{
 };
 use actix_web::{web, HttpResponse};
 use chrono::offset::Utc;
-use serde_json::json;
+use serde_json::{json, value::Value as JsonValue};
 use truelayer_rust::apis::{
     auth::Credentials,
     merchant_accounts::{
@@ -793,3 +793,8 @@ pub(super) async fn submit_provider_return_parameters(
         }
     }))
 }
+
+/// POST /v1/test-signature
+pub(super) async fn test_signature(_req: web::Json<JsonValue>) -> HttpResponse {
+    HttpResponse::NoContent().finish()
+}

tests/integration_tests/mod.rs

@@ -5,3 +5,4 @@ mod payments;
 mod payments_providers;
 mod payouts;
 mod refunds;
+mod stablecoin;

tests/integration_tests/stablecoin.rs

@@ -0,0 +1,10 @@
+use crate::common::test_context::TestContext;
+
+#[tokio::test]
+async fn valid_test_signature_success() {
+    let ctx = TestContext::start().await;
+
+    let res = ctx.client.stablecoin.test_signature().await;
+
+    assert!(res.is_ok());
+}