test(ra_e2e): add e2e coverage for 4 LSP 3.17 tools and MCP resources

Add 7 sub-cases to ra_e2e_suite:
- sc_get_signature_help, sc_go_to_implementation, sc_go_to_type_definition,
  sc_get_inlay_hints — cover the 4 tools added in #124 that had no e2e
  coverage against real rust-analyzer
- sc_list_resources, sc_read_resource, sc_subscribe_unsubscribe_resource —
  cover the MCP resources path (list/read/subscribe/unsubscribe) end-to-end

Add list_resources, read_resource, subscribe_resource, unsubscribe_resource
to McpClient test helper. Add lib_rs_uri() helper that derives the
lsp-diagnostics:// URI from the live resources/list response to avoid
path-encoding drift on macOS canonicalised paths.

Append lsp317_target() to the rust_workspace fixture as a stable anchor
for the new sub-cases (append-only, no existing anchors disturbed).

Closes #129, closes #130

Author: bug-ops

CHANGELOG.md

@@ -25,6 +25,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - **LSP server requests** — Handle server-to-client requests such as `client/registerCapability`, fixing tsgo timeouts.
 - **Integration tests** — Add `[workspace]` table to `tests/fixtures/rust_workspace/Cargo.toml` so cargo treats the fixture as a standalone workspace; fixes 8 rust-analyzer integration tests that failed with "Failed to load workspaces." (#118)
+- **e2e coverage** — Add ra_e2e sub-cases for `get_signature_help`, `go_to_implementation`, `go_to_type_definition`, `get_inlay_hints` (4 LSP 3.17 tools from #124 had no coverage); add `list_resources`, `read_resource`, `subscribe_resource`, `unsubscribe_resource` to `McpClient` and ra_e2e_suite (MCP resources path was entirely untested) (#129, #130)
 
 ## [0.3.6] - 2026-04-21
 

crates/mcpls-core/tests/e2e/mcp_client.rs

@@ -190,6 +190,70 @@ impl McpClient {
         self.send_request(&request)
     }
 
+    /// List MCP resources (`resources/list`).
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the request cannot be sent or the server returns an error.
+    #[allow(dead_code)]
+    pub fn list_resources(&mut self) -> Result<Value> {
+        let request = json!({
+            "jsonrpc": "2.0",
+            "id": self.next_id(),
+            "method": "resources/list",
+            "params": {}
+        });
+        self.send_request(&request)
+    }
+
+    /// Read an MCP resource by URI (`resources/read`).
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the request cannot be sent or the server returns an error.
+    #[allow(dead_code)]
+    pub fn read_resource(&mut self, uri: &str) -> Result<Value> {
+        let request = json!({
+            "jsonrpc": "2.0",
+            "id": self.next_id(),
+            "method": "resources/read",
+            "params": { "uri": uri }
+        });
+        self.send_request(&request)
+    }
+
+    /// Subscribe to a resource (`resources/subscribe`).
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the request cannot be sent or the server returns an error.
+    #[allow(dead_code)]
+    pub fn subscribe_resource(&mut self, uri: &str) -> Result<Value> {
+        let request = json!({
+            "jsonrpc": "2.0",
+            "id": self.next_id(),
+            "method": "resources/subscribe",
+            "params": { "uri": uri }
+        });
+        self.send_request(&request)
+    }
+
+    /// Unsubscribe from a resource (`resources/unsubscribe`).
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the request cannot be sent or the server returns an error.
+    #[allow(dead_code)]
+    pub fn unsubscribe_resource(&mut self, uri: &str) -> Result<Value> {
+        let request = json!({
+            "jsonrpc": "2.0",
+            "id": self.next_id(),
+            "method": "resources/unsubscribe",
+            "params": { "uri": uri }
+        });
+        self.send_request(&request)
+    }
+
     /// Send a raw JSON-RPC request and return the response.
     ///
     /// # Errors

crates/mcpls-core/tests/fixtures/rust_workspace/src/lib.rs

@@ -94,3 +94,11 @@ pub struct CodeActionTarget;
 // split to multi-line so RA can offer "implement missing members" inside the block
 impl Greet for CodeActionTarget {
 }
+
+/// Stable target for LSP 3.17 sub-cases (signature help, type definition, inlay hints).
+#[allow(dead_code, clippy::let_underscore_untyped)]
+pub fn lsp317_target() {
+    let p = Point { x: 1.0, y: 2.0 };
+    let s = add(1, 2);
+    let _ = (p, s);
+}