script tests: add test utils

tests/scripts/scripts/lib/test-utils.lua

@@ -0,0 +1,36 @@
+-- WirePlumber
+
+-- Copyright © 2022 Collabora Ltd.
+--    @author Ashok Sidipotu <ashok.sidipotu@collabora.com>
+
+-- SPDX-License-Identifier: MIT
+
+-- Script is a Lua Module of common Lua test utility functions
+
+local tutils = {}
+
+function tutils.createNode(name, media_class, factory_name)
+  local properties = {}
+  properties ["node.name"] = name
+  properties ["media.class"] = media_class
+  properties ["factory.name"] = factory_name
+
+  node = Node ("adapter", properties)
+  node:activate (Feature.Proxy.BOUND, function (n)
+    Log.info(node, "created and activated node: "
+        .. n.properties ["node.name"])
+  end)
+
+  return node
+end
+
+tutils.linkables_om = ObjectManager {
+  Interest {
+    type = "SiLinkable",
+    Constraint { "item.factory.name", "c", "si-audio-adapter", "si-node" },
+    Constraint { "active-features", "!", 0, type = "gobject" },
+  }
+}
+tutils.linkables_om:activate()
+
+return tutils