Finalized

test/test.cc

@@ -114,6 +114,17 @@ void test_build_list() {
     }
 }
 
+void test_misplaced_fn_empty() {
+    std::vector<std::string> candidates = {"apple", "ample", "angle"};
+    std::string wrong = "x"; 
+    IndexMap green{{1, 'p'}}; 
+    IndexMap yellow;          
+    do_filter(candidates, wrong, green, yellow);
+    assert(candidates.size() == 1);
+    assert(candidates[0] == "apple");
+    std::cout << "test_misplaced_fn_empty passed.\n";
+}
+
 int main() {
     test_read_candidates();
     test_contains_any_of();
@@ -122,6 +133,7 @@ int main() {
     test_wrong_fn();
     test_correct_fn();
     test_misplaced_fn();
+    test_misplaced_fn_empty();
     test_do_filter();
     test_build_list();