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// 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)
}
}
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