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Eric Chiang
281
vendor/github.com/kylelemons/godebug/pretty/examples_test.go
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vendored
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281
vendor/github.com/kylelemons/godebug/pretty/examples_test.go
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// Copyright 2013 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 pretty_test
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import (
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"fmt"
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"github.com/kylelemons/godebug/pretty"
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)
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func ExampleConfig_Sprint() {
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type Pair [2]int
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type Map struct {
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Name string
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Players map[string]Pair
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Obstacles map[Pair]string
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}
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m := Map{
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Name: "Rock Creek",
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Players: map[string]Pair{
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"player1": {1, 3},
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"player2": {0, -1},
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},
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Obstacles: map[Pair]string{
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Pair{0, 0}: "rock",
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Pair{2, 1}: "pond",
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Pair{1, 1}: "stream",
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Pair{0, 1}: "stream",
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},
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}
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// Specific output formats
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compact := &pretty.Config{
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Compact: true,
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}
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diffable := &pretty.Config{
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Diffable: true,
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}
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// Print out a summary
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fmt.Printf("Players: %s\n", compact.Sprint(m.Players))
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// Print diffable output
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fmt.Printf("Map State:\n%s", diffable.Sprint(m))
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// Output:
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// Players: {player1:[1,3],player2:[0,-1]}
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// Map State:
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// {
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// Name: "Rock Creek",
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// Players: {
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// player1: [
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// 1,
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// 3,
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// ],
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// player2: [
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// 0,
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// -1,
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// ],
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// },
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// Obstacles: {
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// [0,0]: "rock",
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// [0,1]: "stream",
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// [1,1]: "stream",
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// [2,1]: "pond",
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// },
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// }
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}
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func ExamplePrint() {
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type ShipManifest struct {
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Name string
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Crew map[string]string
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Androids int
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Stolen bool
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}
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manifest := &ShipManifest{
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Name: "Spaceship Heart of Gold",
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Crew: map[string]string{
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"Zaphod Beeblebrox": "Galactic President",
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"Trillian": "Human",
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"Ford Prefect": "A Hoopy Frood",
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"Arthur Dent": "Along for the Ride",
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},
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Androids: 1,
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Stolen: true,
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}
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pretty.Print(manifest)
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// Output:
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// {Name: "Spaceship Heart of Gold",
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// Crew: {Arthur Dent: "Along for the Ride",
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// Ford Prefect: "A Hoopy Frood",
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// Trillian: "Human",
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// Zaphod Beeblebrox: "Galactic President"},
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// Androids: 1,
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// Stolen: true}
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}
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var t = struct {
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Errorf func(string, ...interface{})
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}{
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Errorf: func(format string, args ...interface{}) {
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fmt.Println(fmt.Sprintf(format, args...) + "\n")
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},
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}
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func ExampleCompare_testing() {
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// Code under test:
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type ShipManifest struct {
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Name string
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Crew map[string]string
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Androids int
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Stolen bool
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}
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// AddCrew tries to add the given crewmember to the manifest.
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AddCrew := func(m *ShipManifest, name, title string) {
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if m.Crew == nil {
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m.Crew = make(map[string]string)
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}
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m.Crew[title] = name
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}
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// Test function:
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tests := []struct {
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desc string
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before *ShipManifest
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name, title string
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after *ShipManifest
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}{
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{
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desc: "add first",
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before: &ShipManifest{},
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name: "Zaphod Beeblebrox",
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title: "Galactic President",
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after: &ShipManifest{
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Crew: map[string]string{
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"Zaphod Beeblebrox": "Galactic President",
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},
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},
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},
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{
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desc: "add another",
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before: &ShipManifest{
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Crew: map[string]string{
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"Zaphod Beeblebrox": "Galactic President",
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},
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},
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name: "Trillian",
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title: "Human",
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after: &ShipManifest{
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Crew: map[string]string{
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"Zaphod Beeblebrox": "Galactic President",
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"Trillian": "Human",
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},
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},
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},
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{
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desc: "overwrite",
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before: &ShipManifest{
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Crew: map[string]string{
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"Zaphod Beeblebrox": "Galactic President",
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},
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},
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name: "Zaphod Beeblebrox",
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title: "Just this guy, you know?",
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after: &ShipManifest{
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Crew: map[string]string{
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"Zaphod Beeblebrox": "Just this guy, you know?",
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},
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},
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},
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}
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for _, test := range tests {
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AddCrew(test.before, test.name, test.title)
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if diff := pretty.Compare(test.before, test.after); diff != "" {
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t.Errorf("%s: post-AddCrew diff: (-got +want)\n%s", test.desc, diff)
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}
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}
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// Output:
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// add first: post-AddCrew diff: (-got +want)
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// {
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// Name: "",
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// Crew: {
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// - Galactic President: "Zaphod Beeblebrox",
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// + Zaphod Beeblebrox: "Galactic President",
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// },
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// Androids: 0,
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// Stolen: false,
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// }
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//
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// add another: post-AddCrew diff: (-got +want)
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// {
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// Name: "",
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// Crew: {
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// - Human: "Trillian",
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// + Trillian: "Human",
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// Zaphod Beeblebrox: "Galactic President",
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// },
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// Androids: 0,
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// Stolen: false,
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// }
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//
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// overwrite: post-AddCrew diff: (-got +want)
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// {
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// Name: "",
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// Crew: {
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// - Just this guy, you know?: "Zaphod Beeblebrox",
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// - Zaphod Beeblebrox: "Galactic President",
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// + Zaphod Beeblebrox: "Just this guy, you know?",
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// },
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// Androids: 0,
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// Stolen: false,
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// }
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}
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func ExampleCompare_debugging() {
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type ShipManifest struct {
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Name string
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Crew map[string]string
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Androids int
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Stolen bool
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}
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reported := &ShipManifest{
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Name: "Spaceship Heart of Gold",
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Crew: map[string]string{
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"Zaphod Beeblebrox": "Galactic President",
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"Trillian": "Human",
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"Ford Prefect": "A Hoopy Frood",
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"Arthur Dent": "Along for the Ride",
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},
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Androids: 1,
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Stolen: true,
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}
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expected := &ShipManifest{
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Name: "Spaceship Heart of Gold",
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Crew: map[string]string{
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"Trillian": "Human",
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"Rowan Artosok": "Captain",
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},
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Androids: 1,
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Stolen: false,
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}
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fmt.Println(pretty.Compare(reported, expected))
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// Output:
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// {
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// Name: "Spaceship Heart of Gold",
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// Crew: {
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// - Arthur Dent: "Along for the Ride",
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// - Ford Prefect: "A Hoopy Frood",
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// + Rowan Artosok: "Captain",
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// Trillian: "Human",
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// - Zaphod Beeblebrox: "Galactic President",
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// },
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// Androids: 1,
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// - Stolen: true,
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// + Stolen: false,
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// }
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}
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