snapshot of https://github.com/ThreeDotsLabs/watermill.git (master, 2026-09-15; blobs > 131072B omitted)

uuid_test.go

@@ -0,0 +1,57 @@
+package watermill_test
+
+import (
+	"sync"
+	"testing"
+
+	"github.com/ThreeDotsLabs/watermill"
+)
+
+func testUniqueness(t *testing.T, genFunc func() string) {
+	producers := 100
+	uuidsPerProducer := 10000
+
+	if testing.Short() {
+		producers = 10
+		uuidsPerProducer = 1000
+	}
+
+	uuidsCount := producers * uuidsPerProducer
+
+	uuids := make(chan string, uuidsCount)
+	allGenerated := sync.WaitGroup{}
+	allGenerated.Add(producers)
+
+	for i := 0; i < producers; i++ {
+		go func() {
+			for j := 0; j < uuidsPerProducer; j++ {
+				uuids <- genFunc()
+			}
+			allGenerated.Done()
+		}()
+	}
+
+	uniqueUUIDs := make(map[string]struct{}, uuidsCount)
+
+	allGenerated.Wait()
+	close(uuids)
+
+	for uuid := range uuids {
+		if _, ok := uniqueUUIDs[uuid]; ok {
+			t.Error(uuid, " has duplicate")
+		}
+		uniqueUUIDs[uuid] = struct{}{}
+	}
+}
+
+func TestUUID(t *testing.T) {
+	testUniqueness(t, watermill.NewUUID)
+}
+
+func TestShortUUID(t *testing.T) {
+	testUniqueness(t, watermill.NewShortUUID)
+}
+
+func TestULID(t *testing.T) {
+	testUniqueness(t, watermill.NewULID)
+}