refactor: remove NoCopy struct; move RefCounter struct to goutils and update usage; remove internal/utils entirely

internal/utils/ref_count_test.go

@@ -1,78 +0,0 @@
-package utils
-
-import (
-	"sync"
-	"testing"
-	"time"
-
-	expect "github.com/yusing/goutils/testing"
-)
-
-func TestRefCounterAddSub(t *testing.T) {
-	rc := NewRefCounter() // Count starts at 1
-
-	var wg sync.WaitGroup
-
-	rc.Add()
-	for range 2 {
-		wg.Go(rc.Sub)
-	}
-
-	wg.Wait()
-	expect.Equal(t, int(rc.refCount), 0)
-
-	select {
-	case <-rc.Zero():
-		// Expected behavior
-	case <-time.After(1 * time.Second):
-		t.Fatal("Expected Zero channel to close, but it didn't")
-	}
-}
-
-func TestRefCounterMultipleAddSub(t *testing.T) {
-	rc := NewRefCounter()
-
-	var wg sync.WaitGroup
-	numAdds := 5
-	numSubs := 5
-	wg.Add(numAdds)
-
-	for range numAdds {
-		go func() {
-			defer wg.Done()
-			rc.Add()
-		}()
-	}
-	wg.Wait()
-	expect.Equal(t, int(rc.refCount), numAdds+1)
-
-	wg.Add(numSubs)
-	for range numSubs {
-		go func() {
-			defer wg.Done()
-			rc.Sub()
-		}()
-	}
-	wg.Wait()
-	expect.Equal(t, int(rc.refCount), numAdds+1-numSubs)
-
-	rc.Sub()
-	select {
-	case <-rc.Zero():
-		// Expected behavior
-	case <-time.After(1 * time.Second):
-		t.Fatal("Expected Zero channel to close, but it didn't")
-	}
-}
-
-func TestRefCounterOneInitially(t *testing.T) {
-	rc := NewRefCounter()
-	rc.Sub() // Bring count to zero
-
-	select {
-	case <-rc.Zero():
-		// Expected behavior
-	case <-time.After(1 * time.Second):
-		t.Fatal("Expected Zero channel to close, but it didn't")
-	}
-}