68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
// Copyright 2018 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"bytes"
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"strconv"
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"testing"
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)
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func TestCopyAndInject(t *testing.T) {
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s := "abcdefghijklmnopqrstuvwxyz"
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testCases := []struct {
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offset, size uint64
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value string
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expected string
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}{
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{
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offset: 0,
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size: 1,
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value: "A",
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expected: "Abcdefghijklmnopqrstuvwxyz",
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},
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{
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offset: 1,
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size: 1,
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value: "B",
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expected: "aBcdefghijklmnopqrstuvwxyz",
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},
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{
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offset: 1,
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size: 1,
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value: "BCD",
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expected: "aBcdefghijklmnopqrstuvwxyz",
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},
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{
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offset: 25,
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size: 1,
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value: "Z",
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expected: "abcdefghijklmnopqrstuvwxyZ",
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},
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}
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for i, testCase := range testCases {
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t.Run(strconv.Itoa(i), func(t *testing.T) {
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in := bytes.NewReader([]byte(s))
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out := &bytes.Buffer{}
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copyAndInject(in, out, testCase.offset, testCase.size, testCase.value)
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if out.String() != testCase.expected {
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t.Errorf("expected %s, got %s", testCase.expected, out.String())
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}
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})
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}
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}
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