test for resume unfinished todos

crates/g3-core/tests/test_todo_completion.rs

@@ -0,0 +1,78 @@
+//! Tests for TODO completion detection and file deletion behavior
+
+/// Helper to check if all TODOs are complete (same logic as in lib.rs)
+fn all_todos_complete(content: &str) -> bool {
+    let has_incomplete = content.lines().any(|line| {
+        let trimmed = line.trim();
+        trimmed.starts_with("- [ ]")
+    });
+    
+    !has_incomplete && (content.contains("- [x]") || content.contains("- [X]"))
+}
+
+#[test]
+fn test_all_complete_lowercase() {
+    let content = "# Test\n\n- [x] Done 1\n- [x] Done 2";
+    assert!(all_todos_complete(content));
+}
+
+#[test]
+fn test_all_complete_uppercase() {
+    let content = "# Test\n\n- [X] Done 1\n- [X] Done 2";
+    assert!(all_todos_complete(content));
+}
+
+#[test]
+fn test_all_complete_mixed_case() {
+    let content = "# Test\n\n- [x] Done 1\n- [X] Done 2";
+    assert!(all_todos_complete(content));
+}
+
+#[test]
+fn test_has_incomplete() {
+    let content = "# Test\n\n- [x] Done 1\n- [ ] Not done";
+    assert!(!all_todos_complete(content));
+}
+
+#[test]
+fn test_all_incomplete() {
+    let content = "# Test\n\n- [ ] Not done 1\n- [ ] Not done 2";
+    assert!(!all_todos_complete(content));
+}
+
+#[test]
+fn test_no_checkboxes() {
+    let content = "# Just a header\n\nSome text without checkboxes";
+    assert!(!all_todos_complete(content));
+}
+
+#[test]
+fn test_nested_complete() {
+    let content = "# Test\n\n- [x] Parent\n  - [x] Child 1\n  - [x] Child 2";
+    assert!(all_todos_complete(content));
+}
+
+#[test]
+fn test_nested_incomplete() {
+    let content = "# Test\n\n- [x] Parent\n  - [x] Child 1\n  - [ ] Child 2";
+    assert!(!all_todos_complete(content));
+}
+
+#[test]
+fn test_indented_incomplete() {
+    // Indented incomplete items should still be detected
+    let content = "# Test\n\n- [x] Done\n    - [ ] Indented incomplete";
+    assert!(!all_todos_complete(content));
+}
+
+#[test]
+fn test_empty_content() {
+    let content = "";
+    assert!(!all_todos_complete(content));
+}
+
+#[test]
+fn test_whitespace_only() {
+    let content = "   \n\n   ";
+    assert!(!all_todos_complete(content));
+}