lang: Unnested the core package from the functions dir

The core package could contain non-functions, so we might as well move
it upwards.

lang/core/convert/to_int_test.go

@@ -0,0 +1,46 @@
+// Mgmt
+// Copyright (C) 2013-2024+ 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 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package convert
+
+import (
+	"testing"
+
+	"github.com/purpleidea/mgmt/lang/types"
+)
+
+func testToInt(t *testing.T, input float64, expected int64) {
+
+	got, err := ToInt([]types.Value{&types.FloatValue{V: input}})
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	if got.Int() != expected {
+		t.Errorf("invalid output, expected %v, got %v", expected, got)
+		return
+	}
+}
+
+func TestToInt1(t *testing.T) {
+	testToInt(t, 2.09, 2)
+
+}
+
+func TestToInt2(t *testing.T) {
+	testToInt(t, 7.8, 7)
+}