Step 94a: AST source spans

editor/tests/step94a_test.cpp

@@ -0,0 +1,39 @@
+// Step 94a TDD Test: AST source span tracking
+//
+// Tests:
+// 1. Parser assigns spans to AST nodes
+// 2. Serialization preserves spans
+
+#include <cassert>
+#include <iostream>
+#include "ast/Parser.h"
+#include "ast/Serialization.h"
+
+int main() {
+    int passed = 0;
+    int failed = 0;
+
+    std::string source = "def foo(x):\n  return x\n";
+    auto mod = TreeSitterParser::parsePython(source);
+    assert(mod);
+    auto funcs = mod->getChildren("functions");
+    assert(!funcs.empty());
+    auto* fn = funcs[0];
+    assert(fn->hasSpan());
+    assert(fn->spanStartLine == 0);
+    assert(fn->spanEndLine >= 1);
+    std::cout << "Test 1 PASS: parser spans set" << std::endl;
+    ++passed;
+
+    auto j = toJson(fn);
+    assert(j.contains("span"));
+    assert(j["span"].contains("start"));
+    auto* round = fromJson(j);
+    assert(round->hasSpan());
+    assert(round->spanStartLine == fn->spanStartLine);
+    std::cout << "Test 2 PASS: serialization preserves spans" << std::endl;
+    ++passed;
+
+    std::cout << "\n=== Step 94a Results: " << passed << " passed, " << failed << " failed ===" << std::endl;
+    return failed > 0 ? 1 : 0;
+}