Step 88: drag-and-drop open

editor/tests/step88_test.cpp

@@ -0,0 +1,49 @@
+// Step 88 TDD Test: Drag-and-drop handler
+//
+// Tests:
+// 1. File drop invokes file callback
+// 2. Folder drop invokes folder callback
+
+#include <cassert>
+#include <iostream>
+#include <filesystem>
+#include <fstream>
+#include "DragDropHandler.h"
+
+int main() {
+    int passed = 0;
+    int failed = 0;
+
+    std::filesystem::path root = std::filesystem::current_path() / "tmp_step88";
+    std::filesystem::create_directories(root / "dir");
+    std::filesystem::path file = root / "file.txt";
+    std::ofstream f(file.string());
+    f << "x";
+    f.close();
+
+    bool fileCalled = false;
+    bool folderCalled = false;
+
+    DragDropHandler::handleDrop(file.string(),
+        [&](const std::string& p){ fileCalled = (p == file.string()); },
+        [&](const std::string& p){ folderCalled = (p == (root / "dir").string()); }
+    );
+    assert(fileCalled);
+    std::cout << "Test 1 PASS: File drop" << std::endl;
+    ++passed;
+
+    fileCalled = false;
+    folderCalled = false;
+    DragDropHandler::handleDrop((root / "dir").string(),
+        [&](const std::string& p){ fileCalled = (p == file.string()); },
+        [&](const std::string& p){ folderCalled = (p == (root / "dir").string()); }
+    );
+    assert(folderCalled);
+    std::cout << "Test 2 PASS: Folder drop" << std::endl;
+    ++passed;
+
+    std::filesystem::remove_all(root);
+
+    std::cout << "\n=== Step 88 Results: " << passed << " passed, " << failed << " failed ===" << std::endl;
+    return failed > 0 ? 1 : 0;
+}