Step 91: LSP diagnostics integration

editor/tests/step91_test.cpp

@@ -0,0 +1,37 @@
+// Step 91 TDD Test: LSP diagnostics integration
+//
+// Tests:
+// 1. handleMessage parses publishDiagnostics
+
+#include <cassert>
+#include <iostream>
+#include "LSPClient.h"
+
+struct MockTransport : public LSPTransport {
+    std::vector<std::string> sent;
+    void send(const std::string& msg) override { sent.push_back(msg); }
+    bool receive(std::string& out) override { (void)out; return false; }
+    bool isOpen() const override { return true; }
+    void close() override {}
+};
+
+int main() {
+    int passed = 0;
+    int failed = 0;
+
+    auto transport = std::make_shared<MockTransport>();
+    LSPClient client(transport);
+
+    std::string msg = R"({"jsonrpc":"2.0","method":"textDocument/publishDiagnostics","params":{"uri":"file:///tmp/a.py","diagnostics":[{"range":{"start":{"line":1,"character":2},"end":{"line":1,"character":3}},"severity":1,"message":"err"}]}})";
+    client.handleMessage(msg);
+
+    auto diags = client.getDiagnostics();
+    assert(diags.size() == 1);
+    assert(diags[0].uri == "file:///tmp/a.py");
+    assert(diags[0].message == "err");
+    std::cout << "Test 1 PASS: publishDiagnostics parsed" << std::endl;
+    ++passed;
+
+    std::cout << "\n=== Step 91 Results: " << passed << " passed, " << failed << " failed ===" << std::endl;
+    return failed > 0 ? 1 : 0;
+}