Use testcontainers for Rust PostgreSQL tests

apps/mcp-server/Cargo.toml

@@ -33,4 +33,5 @@ uuid.workspace = true
 [dev-dependencies]
 crank-mapping = { path = "../../crates/crank-mapping" }
 crank-schema = { path = "../../crates/crank-schema" }
+crank-test-support = { path = "../../crates/crank-test-support" }
 reqwest.workspace = true

apps/mcp-server/src/main.rs

@@ -127,7 +127,7 @@ fn mcp_api_rate_limit_config_from_env() -> Result<RequestRateLimitConfig, Box<dy
 mod tests {
     use std::{
         collections::BTreeMap,
-        env, io,
+        io,
         sync::{Arc, Mutex},
         time::Duration,
     };
@@ -158,7 +158,6 @@ mod tests {
     use futures_util::stream;
     use serde_json::{Value, json};
     use sha2::{Digest, Sha256};
-    use sqlx::{Executor, postgres::PgPoolOptions};
     use time::{OffsetDateTime, format_description::well_known::Rfc3339};
     use tokio::net::TcpListener;
     use tokio::time::sleep;
@@ -1792,23 +1791,8 @@ mod tests {
     }
 
     async fn test_registry() -> PostgresRegistry {
-        let database_url = env::var("TEST_DATABASE_URL")
-            .unwrap_or_else(|_| "postgres://crank:crank@127.0.0.1:15432/crank".to_owned());
-        let admin_pool = PgPoolOptions::new()
-            .max_connections(1)
-            .connect(&database_url)
-            .await
-            .unwrap();
-        let schema = format!("test_mcp_server_{}", uuid::Uuid::now_v7().simple());
-
-        admin_pool
-            .execute(sqlx::query(&format!("create schema {schema}")))
-            .await
-            .unwrap();
-
-        PostgresRegistry::connect(&format!("{database_url}?options=-csearch_path%3D{schema}"))
-            .await
-            .unwrap()
+        let database_url = crank_test_support::postgres_schema_url("test_mcp_server").await;
+        PostgresRegistry::connect(&database_url).await.unwrap()
     }
 
     fn test_operation(base_url: &str, name: &str) -> Operation<Schema, MappingSet> {