random_bugs: make it seedable and reusable

1 files changed, 126 insertions, 0 deletions

diff --git a/misc/random_bugs/create_random_bugs.go b/misc/random_bugs/create_random_bugs.go
new file mode 100644
index 00000000..54dad58a
--- /dev/null
+++ b/misc/random_bugs/create_random_bugs.go
@@ -0,0 +1,126 @@
+package random_bugs
+
+import (
+	"math/rand"
+	"strings"
+	"time"
+
+	"github.com/MichaelMure/git-bug/bug"
+	"github.com/MichaelMure/git-bug/bug/operations"
+	"github.com/MichaelMure/git-bug/repository"
+	"github.com/icrowley/fake"
+)
+
+type opsGenerator func(*bug.Bug, bug.Person)
+
+type Options struct {
+	BugNumber    int
+	PersonNumber int
+	MinOp        int
+	MaxOp        int
+}
+
+func DefaultOptions() Options {
+	return Options{
+		BugNumber:    15,
+		PersonNumber: 5,
+		MinOp:        3,
+		MaxOp:        20,
+	}
+}
+
+func GenerateRandomBugs(repo repository.Repo, opts Options) {
+	GenerateRandomBugsWithSeed(repo, opts, time.Now().UnixNano())
+}
+
+func GenerateRandomBugsWithSeed(repo repository.Repo, opts Options, seed int64) {
+	rand.Seed(seed)
+	fake.Seed(seed)
+
+	opsGenerators := []opsGenerator{
+		comment,
+		comment,
+		title,
+		labels,
+		operations.Open,
+		operations.Close,
+	}
+
+	for i := 0; i < opts.BugNumber; i++ {
+		addedLabels = []string{}
+
+		b, err := operations.Create(randomPerson(opts.PersonNumber), fake.Sentence(), paragraphs())
+
+		if err != nil {
+			panic(err)
+		}
+
+		nOps := opts.MinOp + rand.Intn(opts.MaxOp-opts.MinOp)
+		for j := 0; j < nOps; j++ {
+			index := rand.Intn(len(opsGenerators))
+			opsGenerators[index](b, randomPerson(opts.PersonNumber))
+		}
+
+		err = b.Commit(repo)
+		if err != nil {
+			panic(err)
+		}
+	}
+}
+
+func person() bug.Person {
+	return bug.Person{
+		Name:  fake.FullName(),
+		Email: fake.EmailAddress(),
+	}
+}
+
+var persons []bug.Person
+
+func randomPerson(personNumber int) bug.Person {
+	if len(persons) == 0 {
+		persons = make([]bug.Person, personNumber)
+		for i := range persons {
+			persons[i] = person()
+		}
+	}
+
+	index := rand.Intn(personNumber)
+	return persons[index]
+}
+
+func paragraphs() string {
+	p := fake.Paragraphs()
+	return strings.Replace(p, "\t", "\n\n", -1)
+}
+
+func comment(b *bug.Bug, p bug.Person) {
+	operations.Comment(b, p, paragraphs())
+}
+
+func title(b *bug.Bug, p bug.Person) {
+	operations.SetTitle(b, p, fake.Sentence())
+}
+
+var addedLabels []string
+
+func labels(b *bug.Bug, p bug.Person) {
+	var removed []string
+	nbRemoved := rand.Intn(3)
+	for nbRemoved > 0 && len(addedLabels) > 0 {
+		index := rand.Intn(len(addedLabels))
+		removed = append(removed, addedLabels[index])
+		addedLabels[index] = addedLabels[len(addedLabels)-1]
+		addedLabels = addedLabels[:len(addedLabels)-1]
+	}
+
+	var added []string
+	nbAdded := rand.Intn(3)
+	for i := 0; i < nbAdded; i++ {
+		label := fake.Word()
+		added = append(added, label)
+		addedLabels = append(addedLabels, label)
+	}
+
+	operations.ChangeLabels(nil, b, p, added, removed)
+}