Return subscription from channel-preview [skip-tests]

scnserver/test/util/common.go

@@ -306,6 +306,22 @@ func AssertAny(v any) {
 	// used to prevent golang "unused variable error"
 }
 
+func AssertNil(t *testing.T, key string, v any) {
+	if v != nil {
+		t.Errorf("AssertNil(%s) failed - actual value:\n%+v", key, v)
+		t.Error(string(debug.Stack()))
+		t.FailNow()
+	}
+}
+
+func AssertNotNil(t *testing.T, key string, v any) {
+	if v == nil {
+		t.Errorf("AssertNotNil(%s) failed", key)
+		t.Error(string(debug.Stack()))
+		t.FailNow()
+	}
+}
+
 func unpointer(v any) any {
 	if v == nil {
 		return v