/**
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* @license
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* Copyright 2020 Google LLC. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* =============================================================================
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*/
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import * as tf from '../../index';
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import { ALL_ENVS, describeWithFlags } from '../../jasmine_util';
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import { expectArraysClose } from '../../test_util';
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describeWithFlags('hannWindow', ALL_ENVS, () => {
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it('length=3', async () => {
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const ret = tf.signal.hannWindow(3);
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expectArraysClose(await ret.data(), [0, 1, 0]);
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});
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it('length=7', async () => {
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const ret = tf.signal.hannWindow(7);
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expectArraysClose(await ret.data(), [0, 0.25, 0.75, 1, 0.75, 0.25, 0]);
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});
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it('length=6', async () => {
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const ret = tf.signal.hannWindow(6);
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expectArraysClose(await ret.data(), [0., 0.25, 0.75, 1., 0.75, 0.25]);
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});
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it('length=20', async () => {
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const ret = tf.signal.hannWindow(20);
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expectArraysClose(await ret.data(), [
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0., 0.02447176, 0.09549153, 0.20610738, 0.34549153,
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0.5, 0.65450853, 0.79389274, 0.9045085, 0.97552824,
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1., 0.97552824, 0.9045085, 0.7938925, 0.65450835,
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0.5, 0.34549144, 0.20610726, 0.09549153, 0.02447173
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]);
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});
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});
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