Initial commit

backend/pkgs/faker/random.go

@@ -0,0 +1,37 @@
+package faker
+
+import (
+	"math/rand"
+	"time"
+)
+
+var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
+
+type Faker struct {
+}
+
+func NewFaker() *Faker {
+	rand.Seed(time.Now().UnixNano())
+	return &Faker{}
+}
+
+func (f *Faker) RandomString(length int) string {
+
+	b := make([]rune, length)
+	for i := range b {
+		b[i] = letters[rand.Intn(len(letters))]
+	}
+	return string(b)
+}
+
+func (f *Faker) RandomEmail() string {
+	return f.RandomString(10) + "@email.com"
+}
+
+func (f *Faker) RandomBool() bool {
+	return rand.Intn(2) == 1
+}
+
+func (f *Faker) RandomNumber(min, max int) int {
+	return rand.Intn(max-min) + min
+}

backend/pkgs/faker/randoms_test.go

@@ -0,0 +1,95 @@
+package faker
+
+import (
+	"testing"
+)
+
+const Loops = 500
+
+func ValidateUnique(values []string) bool {
+	for i := 0; i < len(values); i++ {
+		for j := i + 1; j < len(values); j++ {
+			if values[i] == values[j] {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+func Test_GetRandomString(t *testing.T) {
+	t.Parallel()
+	// Test that the function returns a string of the correct length
+	var generated = make([]string, Loops)
+
+	faker := NewFaker()
+
+	for i := 0; i < Loops; i++ {
+		generated[i] = faker.RandomString(10)
+	}
+
+	if !ValidateUnique(generated) {
+		t.Error("Generated values are not unique")
+	}
+}
+
+func Test_GetRandomEmail(t *testing.T) {
+	t.Parallel()
+	// Test that the function returns a string of the correct length
+	var generated = make([]string, Loops)
+
+	faker := NewFaker()
+
+	for i := 0; i < Loops; i++ {
+		generated[i] = faker.RandomEmail()
+	}
+
+	if !ValidateUnique(generated) {
+		t.Error("Generated values are not unique")
+	}
+}
+
+func Test_GetRandomBool(t *testing.T) {
+	t.Parallel()
+
+	var trues = 0
+	var falses = 0
+
+	faker := NewFaker()
+
+	for i := 0; i < Loops; i++ {
+		if faker.RandomBool() {
+			trues++
+		} else {
+			falses++
+		}
+	}
+
+	if trues == 0 || falses == 0 {
+		t.Error("Generated boolean don't appear random")
+	}
+}
+
+func Test_RandomNumber(t *testing.T) {
+	t.Parallel()
+
+	f := NewFaker()
+
+	const MIN = 0
+	const MAX = 100
+
+	last := MIN - 1
+
+	for i := 0; i < Loops; i++ {
+		n := f.RandomNumber(MIN, MAX)
+
+		if n == last {
+			t.Errorf("RandomNumber() failed to generate unique number")
+		}
+
+		if n < MIN || n > MAX {
+			t.Errorf("RandomNumber() failed to generate a number between %v and %v", MIN, MAX)
+		}
+	}
+
+}