Colin Cross | 957b39c | 2018-03-21 18:10:01 -0700 | [diff] [blame] | 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 | |
| 15 | package parser |
| 16 | |
| 17 | import ( |
| 18 | "bytes" |
| 19 | "testing" |
| 20 | ) |
| 21 | |
| 22 | func 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 | } |