Add unit test for migration

This commit adds a unit test for the migration function.

Author: vincetiu8

README.md

@@ -16,6 +16,11 @@ Sections:
  - Identity
  - OperationPack
  - Config
+
+Note: All imports follow the format mg{migration folder number}{first letter of package}
+For example, to import the bug from the migration 1 folder, its name should be mg1b.
+To import sub-packages, put the first letter of each parent package.
+For example, to import the lamport clock from the migration 1 folder, its name should be mg1ul.
 
 Todo for migration tool:  
  - Remove legacy author and create new identity out of it -- forwards compatible

main.go

@@ -14,6 +14,10 @@ const rootCommandName = "git-bug-migration"
 var repo mg1r.ClockedRepo
 
 func main() {
+	Migrate01()
+}
+
+func Migrate01() {
 	cwd, err := os.Getwd()
 	if err != nil {
 		panic(fmt.Errorf("unable to get the current working directory: %q", err))

main_test.go

@@ -0,0 +1,83 @@
+package main
+
+import (
+	"io/ioutil"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+
+	mg0b "github.com/MichaelMure/git-bug-migration/migration0/bug"
+	mg0r "github.com/MichaelMure/git-bug-migration/migration0/repository"
+	mg1b "github.com/MichaelMure/git-bug-migration/migration1/bug"
+	mg1i "github.com/MichaelMure/git-bug-migration/migration1/identity"
+
+	mg1r "github.com/MichaelMure/git-bug-migration/migration1/repository"
+)
+
+func createFolder() (string, error) {
+	dir, err := ioutil.TempDir("", "")
+	return dir, err
+}
+
+func removeFolder(path string) error {
+	return os.RemoveAll(path)
+}
+
+func TestMigrate01(t *testing.T) {
+	cwd, err := os.Getwd()
+	assert.Nil(t, err, "got error when attempting to access the current working directory")
+
+	oldVinc := mg0b.Person{
+		Name:      "Vincent Tiu",
+		Email:     "vincetiu8@gmail.com",
+		Login:     "invincibot",
+		AvatarUrl: "https://avatars2.githubusercontent.com/u/46623413?s=460&u=56824597898bc22464222f5c33e8eae6d72def5b&v=4",
+	}
+
+	newVinc := mg1i.NewIdentityFull(
+		oldVinc.Name,
+		oldVinc.Email,
+		oldVinc.Login,
+		oldVinc.AvatarUrl,
+	)
+
+	var unix = time.Now().Unix()
+
+	dir, err := createFolder()
+	os.Chdir(dir)
+	assert.Nil(t, err, "got error when creating temporary repository dir with version 0")
+	repo0, err := mg0r.InitGitRepo(dir)
+
+	bug0, _, err := mg0b.Create(oldVinc, unix, "bug1", "beep bop bug")
+	assert.Nil(t, err, "got error when creating bug")
+
+	err = bug0.Commit(repo0)
+	assert.Nil(t, err, "got error when committing bug")
+
+	Migrate01()
+
+	repo1, err := mg1r.NewGitRepo(dir, []mg1r.ClockLoader{mg1b.ClockLoader})
+	assert.Nil(t, err, "got error when loading repository with version 1")
+
+	bugs1 := mg1b.ReadAllLocalBugs(repo1)
+	bug1 := (<-bugs1).Bug
+	operations := mg1b.NewOperationIterator(bug1)
+	assert.Equal(t, true, operations.Next(), "unable to get first operation")
+
+	operation := operations.Value()
+
+	author := operation.GetAuthor()
+	assert.IsType(t, newVinc, author, "author type mismatch")
+	assert.Equal(t, newVinc.Name(), author.Name(), "author name mismatch")
+	assert.Equal(t, newVinc.Email(), author.Email(), "author email mismatch")
+	assert.Equal(t, newVinc.Login(), author.Login(), "author login mismatch")
+	assert.Equal(t, newVinc.AvatarUrl(), author.AvatarUrl(), "author avatarUrl mismatch")
+
+	var bug mg1b.StreamedBug
+	assert.Equal(t, bug, <-bugs1, "got additional bug when getting bugs in repository")
+
+	os.Chdir(cwd)
+	removeFolder(dir)
+}