resources: pkg: Add a simple test based on internal logic

We expect the following to stay true. This has always been a bit weird
for me to either remember or expect, so I added a test for my sanity.

resources/pkg_test.go

@@ -0,0 +1,33 @@
+// Mgmt
+// Copyright (C) 2013-2017+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package resources
+
+import (
+	"testing"
+)
+
+func TestNilList1(t *testing.T) {
+	var x []string
+	if x != nil { // we have this expectation for obj.fileList in pkg
+		t.Errorf("list should have been nil, was: %+v", x)
+	}
+	x = []string{} // empty list
+	if x == nil {
+		t.Errorf("list should have been empty, was: %+v", x)
+	}
+}