some test edit

pttodoest/src/main.rs

@@ -647,5 +647,21 @@ mod edit {
                 });
             });
         }
+
+        #[test]
+        fn test_persist_edits_with_files() {
+            tests::with_dir(|d1| {
+                tests::write_file(&d1, "file", "- foo");
+                let p = d1.path().join("file").display().to_string();
+                let files = Files::new(&vec![p]);
+                tests::with_dir(|d2| {
+                    build_dir(&d2, &files).expect("failed to build dir");
+                    tests::file_contains(&d2, "file", "- foo");
+                    tests::write_file(&d2, "file", "- foobar\n- bar");
+
+                    persist_edits(&d2, &files).expect("failed to persist edits");
+                });
+            });
+        }
     }
 }