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comparison pkg/common/delta_test.go @ 5693:9e9cedae718a sr-v2

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Add inverse funtion to delta.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 12 Feb 2024 14:38:10 +0100
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5692:d920f0fa2f04 5693:9e9cedae718a
1 // This is Free Software under GNU Affero General Public License v >= 3.0
2 // without warranty, see README.md and license for details.
3 //
4 // SPDX-License-Identifier: AGPL-3.0-or-later
5 // License-Filename: LICENSES/AGPL-3.0.txt
6 //
7 // Copyright (C) 2024 by via donau
8 // – Österreichische Wasserstraßen-Gesellschaft mbH
9 // Software engineering by Intevation GmbH
10 //
11 // Author(s):
12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
13
14 package common
15
16 import "testing"
17
18 func TestDelta(t *testing.T) {
19 var (
20 input = []int64{1, 2, 3, 2, 1}
21 want = []int64{1, 1, 1, -1, -1}
22 )
23 delta := Delta()
24 for i, in := range input {
25 if got := delta(in); got != want[i] {
26 t.Errorf("input %d: got %d expected %d", in, got, want[i])
27 }
28 }
29 }
30
31 func TestInvDelta(t *testing.T) {
32 input := []int64{1, 2, 3, 2, 1, -10, 100}
33 delta := Delta()
34 invDelta := InvDelta()
35 for _, in := range input {
36 if got := invDelta(delta(in)); got != in {
37 t.Errorf("input %d: got %d expected %d", in, got, in)
38 }
39 }
40 }