128 lines
2.7 KiB
Go
128 lines
2.7 KiB
Go
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// Copyright 2022 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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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"testing"
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)
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func Test_filesHaveSameContents(t *testing.T) {
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tests := []struct {
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name string
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a string
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b string
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missingA bool
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missingB bool
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equal bool
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}{
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{
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name: "empty",
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a: "",
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b: "",
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equal: true,
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},
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{
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name: "equal",
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a: "foo",
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b: "foo",
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equal: true,
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},
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{
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name: "unequal",
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a: "foo",
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b: "bar",
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equal: false,
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},
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{
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name: "unequal different sizes",
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a: "foo",
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b: "foobar",
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equal: false,
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},
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{
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name: "equal large",
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a: strings.Repeat("a", 2*1024*1024),
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b: strings.Repeat("a", 2*1024*1024),
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equal: true,
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},
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{
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name: "equal large unaligned",
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a: strings.Repeat("a", 2*1024*1024+10),
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b: strings.Repeat("a", 2*1024*1024+10),
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equal: true,
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},
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{
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name: "unequal large",
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a: strings.Repeat("a", 2*1024*1024),
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b: strings.Repeat("a", 2*1024*1024-1) + "b",
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equal: false,
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},
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{
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name: "unequal large unaligned",
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a: strings.Repeat("a", 2*1024*1024+10),
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b: strings.Repeat("a", 2*1024*1024+9) + "b",
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equal: false,
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},
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{
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name: "missing a",
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missingA: true,
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b: "foo",
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equal: false,
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},
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{
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name: "missing b",
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a: "foo",
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missingB: true,
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equal: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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tempDir, err := os.MkdirTemp("", "testFilesHaveSameContents")
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if err != nil {
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t.Fatalf("failed to create temp dir: %s", err)
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}
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defer os.RemoveAll(tempDir)
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fileA := filepath.Join(tempDir, "a")
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fileB := filepath.Join(tempDir, "b")
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if !tt.missingA {
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err := ioutil.WriteFile(fileA, []byte(tt.a), 0666)
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if err != nil {
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t.Fatalf("failed to write %s: %s", fileA, err)
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}
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}
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if !tt.missingB {
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err := ioutil.WriteFile(fileB, []byte(tt.b), 0666)
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if err != nil {
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t.Fatalf("failed to write %s: %s", fileB, err)
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}
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}
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if got := filesHaveSameContents(fileA, fileB); got != tt.equal {
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t.Errorf("filesHaveSameContents() = %v, want %v", got, tt.equal)
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}
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})
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}
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}
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