Step 85: filesystem tree explorer

editor/tests/step85_test.cpp

@@ -0,0 +1,58 @@
+// Step 85 TDD Test: Filesystem tree and gitignore
+//
+// Tests:
+// 1. Builds tree with files and folders
+// 2. Respects .gitignore patterns
+
+#include <cassert>
+#include <iostream>
+#include <filesystem>
+#include <fstream>
+#include "FileTree.h"
+
+static void writeFile(const std::filesystem::path& p, const std::string& text) {
+    std::ofstream f(p.string(), std::ios::binary);
+    f << text;
+}
+
+int main() {
+    int passed = 0;
+    int failed = 0;
+
+    std::filesystem::path root = std::filesystem::current_path() / "tmp_step85";
+    std::filesystem::create_directories(root / "src");
+    std::filesystem::create_directories(root / "ignoredir");
+
+    writeFile(root / "src" / "main.cpp", "int main(){}\n");
+    writeFile(root / "ignore.tmp", "x");
+    writeFile(root / "ignoredir" / "foo.txt", "y");
+    writeFile(root / ".gitignore", "ignoredir/\n*.tmp\n");
+
+    FileTree tree;
+    auto node = tree.build(root.string());
+    assert(node.isDir);
+
+    bool sawMain = false;
+    bool sawIgnored = false;
+    for (const auto& child : node.children) {
+        if (child.name == "src") {
+            for (const auto& c2 : child.children) {
+                if (c2.name == "main.cpp") sawMain = true;
+            }
+        }
+        if (child.name == "ignoredir" || child.name == "ignore.tmp") {
+            sawIgnored = true;
+        }
+    }
+
+    assert(sawMain);
+    assert(!sawIgnored);
+
+    std::cout << "Test 1 PASS: Tree build + gitignore" << std::endl;
+    ++passed;
+
+    std::filesystem::remove_all(root);
+
+    std::cout << "\n=== Step 85 Results: " << passed << " passed, " << failed << " failed ===" << std::endl;
+    return failed > 0 ? 1 : 0;
+}