restructure directories

core/api/util/uniqueid_test.go

@@ -0,0 +1,62 @@
+// Copyright 2016 Documize Inc. <legal@documize.com>. All rights reserved.
+//
+// This software (Documize Community Edition) is licensed under
+// GNU AGPL v3 http://www.gnu.org/licenses/agpl-3.0.en.html
+//
+// You can operate outside the AGPL restrictions by purchasing
+// Documize Enterprise Edition and obtaining a commercial license
+// by contacting <sales@documize.com>.
+//
+// https://documize.com
+
+package util_test
+
+import (
+	"runtime"
+	"sync"
+	"testing"
+
+	"github.com/documize/community/core/api/util"
+)
+
+const sample = 1 << 24
+
+var m = make(map[string]struct{})
+var mx sync.Mutex
+
+func mm(t *testing.T, id string) {
+	if len(id) != 16 {
+		t.Errorf("len(id)=%d", len(id))
+	}
+	mx.Lock()
+	_, found := m[id]
+	if found {
+		t.Error("Duplicate")
+	} else {
+		m[id] = struct{}{}
+	}
+	mx.Unlock()
+}
+
+// TestUniqueID checks that in a large number of calls to UniqueID() they are all different.
+func TestUniqueID(t *testing.T) {
+	var wg sync.WaitGroup
+	c := runtime.NumCPU()
+	ss := sample / c
+	wg.Add(c)
+	for i := 0; i < c; i++ {
+		go func() {
+			for i := 0; i < ss; i++ {
+				mm(t, util.UniqueID())
+			}
+			wg.Done()
+		}()
+	}
+	wg.Wait()
+}
+
+func BenchmarkUniqueID(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		util.UniqueID()
+	}
+}