github.com/westcoastroms/westcoastroms-build@v0.0.0-20190928114312-2350e5a73030/build/blueprint/parser/modify_test.go (about)

     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  }