added watch namespaces support

internal/pkg/controller/manager_test.go

@@ -9,6 +9,25 @@ import (
 	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
 )
 
+func TestBuildDefaultNamespaces(t *testing.T) {
+	if got := buildDefaultNamespaces(nil); got != nil {
+		t.Errorf("empty input should return nil, got %v", got)
+	}
+	if got := buildDefaultNamespaces([]string{}); got != nil {
+		t.Errorf("empty slice should return nil, got %v", got)
+	}
+
+	got := buildDefaultNamespaces([]string{"team-a", "team-b", "team-c"})
+	if len(got) != 3 {
+		t.Fatalf("expected 3 entries, got %d", len(got))
+	}
+	for _, ns := range []string{"team-a", "team-b", "team-c"} {
+		if _, ok := got[ns]; !ok {
+			t.Errorf("missing namespace %q in %v", ns, got)
+		}
+	}
+}
+
 func TestAddOptionalSchemesRegistersCSI(t *testing.T) {
 	// Reset to a clean scheme for the test.
 	runtimeScheme = runtime.NewScheme()