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Colin Cross957b39c2018-03-21 18:10:01 -07001// 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}