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