1// Copyright 2018 Google Inc. All rights reserved. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15package parser 16 17import ( 18 "bytes" 19 "testing" 20) 21 22func TestPatchList(t *testing.T) { 23 expectOverlap := func(err error) { 24 t.Helper() 25 if _, ok := err.(PatchOverlapError); !ok { 26 t.Error("missing PatchOverlapError") 27 } 28 } 29 30 expectOk := func(err error) { 31 t.Helper() 32 if err != nil { 33 t.Error(err) 34 } 35 } 36 37 in := []byte("abcdefghijklmnopqrstuvwxyz") 38 39 patchlist := PatchList{} 40 expectOk(patchlist.Add(0, 3, "ABC")) 41 expectOk(patchlist.Add(12, 15, "MNO")) 42 expectOk(patchlist.Add(24, 26, "Z")) 43 expectOk(patchlist.Add(15, 15, "_")) 44 45 expectOverlap(patchlist.Add(0, 3, "x")) 46 expectOverlap(patchlist.Add(12, 13, "x")) 47 expectOverlap(patchlist.Add(13, 14, "x")) 48 expectOverlap(patchlist.Add(14, 15, "x")) 49 expectOverlap(patchlist.Add(11, 13, "x")) 50 expectOverlap(patchlist.Add(12, 15, "x")) 51 expectOverlap(patchlist.Add(11, 15, "x")) 52 expectOverlap(patchlist.Add(15, 15, "x")) 53 54 if t.Failed() { 55 return 56 } 57 58 buf := new(bytes.Buffer) 59 patchlist.Apply(bytes.NewReader(in), buf) 60 expected := "ABCdefghijklMNO_pqrstuvwxZ" 61 got := buf.String() 62 if got != expected { 63 t.Errorf("expected %q, got %q", expected, got) 64 } 65} 66