| // Copyright 2018 Google Inc. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package parser |
| |
| import ( |
| "bytes" |
| "testing" |
| ) |
| |
| func TestPatchList(t *testing.T) { |
| expectOverlap := func(err error) { |
| t.Helper() |
| if _, ok := err.(PatchOverlapError); !ok { |
| t.Error("missing PatchOverlapError") |
| } |
| } |
| |
| expectOk := func(err error) { |
| t.Helper() |
| if err != nil { |
| t.Error(err) |
| } |
| } |
| |
| in := []byte("abcdefghijklmnopqrstuvwxyz") |
| |
| patchlist := PatchList{} |
| expectOk(patchlist.Add(0, 3, "ABC")) |
| expectOk(patchlist.Add(12, 15, "MNO")) |
| expectOk(patchlist.Add(24, 26, "Z")) |
| expectOk(patchlist.Add(15, 15, "_")) |
| |
| expectOverlap(patchlist.Add(0, 3, "x")) |
| expectOverlap(patchlist.Add(12, 13, "x")) |
| expectOverlap(patchlist.Add(13, 14, "x")) |
| expectOverlap(patchlist.Add(14, 15, "x")) |
| expectOverlap(patchlist.Add(11, 13, "x")) |
| expectOverlap(patchlist.Add(12, 15, "x")) |
| expectOverlap(patchlist.Add(11, 15, "x")) |
| expectOverlap(patchlist.Add(15, 15, "x")) |
| |
| if t.Failed() { |
| return |
| } |
| |
| buf := new(bytes.Buffer) |
| patchlist.Apply(bytes.NewReader(in), buf) |
| expected := "ABCdefghijklMNO_pqrstuvwxZ" |
| got := buf.String() |
| if got != expected { |
| t.Errorf("expected %q, got %q", expected, got) |
| } |
| } |