add Lua sandbox with timer system (milestones 1-5 complete)

sandbox-test/src/test_harness.h

@@ -0,0 +1,85 @@
+#pragma once
+
+#include <string>
+#include <vector>
+#include <functional>
+#include <chrono>
+#include <iostream>
+
+// Simple test result
+struct TestResult {
+    std::string name;
+    bool passed;
+    std::string error_message;
+    int64_t duration_ms;
+};
+
+// Test case definition
+struct TestCase {
+    std::string name;
+    std::function<bool(std::string&)> func;  // Returns true if passed, error in string
+};
+
+// Test runner
+class TestHarness {
+public:
+    void AddTest(const std::string& name, std::function<bool(std::string&)> func);
+
+    // Run all tests or filter by name
+    std::vector<TestResult> Run(const std::string& filter = "");
+
+    // Output results as JSON
+    void WriteJsonReport(const std::vector<TestResult>& results, const std::string& path);
+
+    // Print results to console
+    void PrintResults(const std::vector<TestResult>& results);
+
+private:
+    std::vector<TestCase> m_tests;
+};
+
+// Assertion macros
+#define EXPECT_TRUE(cond) \
+    do { \
+        if (!(cond)) { \
+            error_msg = std::string(__FILE__) + ":" + std::to_string(__LINE__) + \
+                        ": EXPECT_TRUE(" #cond ") failed"; \
+            return false; \
+        } \
+    } while(0)
+
+#define EXPECT_FALSE(cond) \
+    do { \
+        if (cond) { \
+            error_msg = std::string(__FILE__) + ":" + std::to_string(__LINE__) + \
+                        ": EXPECT_FALSE(" #cond ") failed"; \
+            return false; \
+        } \
+    } while(0)
+
+#define EXPECT_EQ(a, b) \
+    do { \
+        if ((a) != (b)) { \
+            error_msg = std::string(__FILE__) + ":" + std::to_string(__LINE__) + \
+                        ": EXPECT_EQ failed: " + std::to_string(a) + " != " + std::to_string(b); \
+            return false; \
+        } \
+    } while(0)
+
+#define EXPECT_NE(a, b) \
+    do { \
+        if ((a) == (b)) { \
+            error_msg = std::string(__FILE__) + ":" + std::to_string(__LINE__) + \
+                        ": EXPECT_NE failed: values are equal"; \
+            return false; \
+        } \
+    } while(0)
+
+#define EXPECT_CONTAINS(haystack, needle) \
+    do { \
+        if ((haystack).find(needle) == std::string::npos) { \
+            error_msg = std::string(__FILE__) + ":" + std::to_string(__LINE__) + \
+                        ": EXPECT_CONTAINS failed: '" + (haystack) + "' does not contain '" + (needle) + "'"; \
+            return false; \
+        } \
+    } while(0)