| 1 | /**
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| 2 | * @license
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| 3 | * Copyright 2020 Google LLC. All Rights Reserved.
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | * =============================================================================
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| 16 | */
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| 17 | import * as tf from '../index';
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| 18 | import { ALL_ENVS, describeWithFlags } from '../jasmine_util';
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| 19 | import { expectArraysClose } from '../test_util';
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| 20 | describeWithFlags('reverse1d', ALL_ENVS, () => {
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| 21 | it('reverse a 1D array', async () => {
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| 22 | const input = tf.tensor1d([1, 2, 3, 4, 5]);
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| 23 | const result = tf.reverse1d(input);
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| 24 | expect(result.shape).toEqual(input.shape);
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| 25 | expectArraysClose(await result.data(), [5, 4, 3, 2, 1]);
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| 26 | });
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| 27 | it('reverse a 1D array, even length', async () => {
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| 28 | const input = tf.tensor1d([1, 2, 3, 4]);
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| 29 | const result = tf.reverse1d(input);
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| 30 | expect(result.shape).toEqual(input.shape);
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| 31 | expectArraysClose(await result.data(), [4, 3, 2, 1]);
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| 32 | });
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| 33 | it('grad', async () => {
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| 34 | const a = tf.tensor1d([1, 2, 3]);
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| 35 | const dy = tf.tensor1d([10, 20, 30]);
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| 36 | const da = tf.grad((a) => tf.reverse1d(a))(a, dy);
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| 37 | expect(da.shape).toEqual([3]);
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| 38 | expectArraysClose(await da.data(), [30, 20, 10]);
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| 39 | });
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| 40 | it('gradient with clones', async () => {
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| 41 | const a = tf.tensor1d([1, 2, 3]);
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| 42 | const dy = tf.tensor1d([10, 20, 30]);
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| 43 | const da = tf.grad((a) => tf.reverse1d(a.clone()).clone())(a, dy);
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| 44 | expect(da.shape).toEqual([3]);
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| 45 | expectArraysClose(await da.data(), [30, 20, 10]);
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| 46 | });
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| 47 | it('accepts a tensor-like object', async () => {
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| 48 | const input = [1, 2, 3, 4, 5];
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| 49 | const result = tf.reverse1d(input);
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| 50 | expect(result.shape).toEqual([5]);
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| 51 | expectArraysClose(await result.data(), [5, 4, 3, 2, 1]);
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| 52 | });
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| 53 | });
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| 54 | //# 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