gx

chenyc

2025-06-12 7b72ac13a83764a662159d4a49b7fffb90476ecb

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/**
 * @license
 * Copyright 2023 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
import { expectArraysEqual } from '../test_util';
import { CompositeArrayBuffer } from './composite_array_buffer';
describe('CompositeArrayBuffer', () => {
    const uniformBuffers = [
        new Uint8Array([0, 1, 2, 3]).buffer,
        new Uint8Array([4, 5, 6, 7]).buffer,
        new Uint8Array([8, 9, 10, 11]).buffer,
        new Uint8Array([12, 13, 14, 15]).buffer,
        new Uint8Array([16]).buffer,
    ];
    const nonUniformBuffers = [
        new Uint8Array([0, 1, 2]).buffer,
        new Uint8Array([3, 4, 5, 6, 7]).buffer,
        new Uint8Array([8, 9, 10, 11]).buffer,
        new Uint8Array([12, 13, 14, 15, 16]).buffer,
    ];
    const bufferTestCases = [
        ['uniform', uniformBuffers],
        ['non-uniform', nonUniformBuffers]
    ];
    for (const [buffersType, buffers] of bufferTestCases) {
        let composite;
        beforeEach(() => {
            composite = new CompositeArrayBuffer(buffers);
        });
        it(`${buffersType}: slices across multiple buffers`, () => {
            expectArraysEqual(new Uint8Array(composite.slice(1, 13)), [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]);
        });
        it(`${buffersType}: slices to the end of the array when \'end\' is not ` +
            'specified', () => {
            expectArraysEqual(new Uint8Array(composite.slice(5)), [5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]);
        });
        it(`${buffersType}: makes a copy when slice() is called with no arguments`, () => {
            expectArraysEqual(new Uint8Array(composite.slice()), [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]);
        });
        it(`${buffersType}: slices from zero when start is negative`, () => {
            expectArraysEqual(new Uint8Array(composite.slice(-4, 5)), [0, 1, 2, 3, 4]);
        });
        it(`${buffersType}: slices to the end when end is greater than length`, () => {
            expectArraysEqual(new Uint8Array(composite.slice(7, 1000)), [7, 8, 9, 10, 11, 12, 13, 14, 15, 16]);
        });
        it(`${buffersType}: slices multiple ranges out of order`, () => {
            expectArraysEqual(new Uint8Array(composite.slice(13, 15)), [13, 14]);
            expectArraysEqual(new Uint8Array(composite.slice(0, 2)), [0, 1]);
            expectArraysEqual(new Uint8Array(composite.slice(9, 13)), [9, 10, 11, 12]);
        });
    }
    it('can be created from an empty arraybuffer', () => {
        const array = new Uint8Array([]);
        const singleComposite = new CompositeArrayBuffer(array.buffer);
        expectArraysEqual(new Uint8Array(singleComposite.slice()), []);
    });
    it('can be created from a single array', () => {
        const array = new Uint8Array([1, 2, 3]);
        const singleComposite = new CompositeArrayBuffer(array.buffer);
        expectArraysEqual(new Uint8Array(singleComposite.slice()), array);
    });
    it('can be created from zero arrays', () => {
        const singleComposite = new CompositeArrayBuffer([]);
        expectArraysEqual(new Uint8Array(singleComposite.slice()), new Uint8Array());
    });
    it('can be created from undefined input', () => {
        const singleComposite = new CompositeArrayBuffer();
        expectArraysEqual(new Uint8Array(singleComposite.slice()), new Uint8Array());
    });
    it('treats NaN as zero when passed as the start of slice', () => {
        const array = new Uint8Array([1, 2, 3]);
        const composite = new CompositeArrayBuffer(array.buffer);
        expectArraysEqual(new Uint8Array(composite.slice(NaN, 2)), [1, 2]);
    });
    it('treats NaN as zero when passed as the end of slice', () => {
        const array = new Uint8Array([1, 2, 3]);
        const composite = new CompositeArrayBuffer(array.buffer);
        expectArraysEqual(new Uint8Array(composite.slice(0, NaN)), []);
    });
    it('supports TypedArray input', () => {
        // This support is necessary for some tests in tfjs-converter. Maybe those
        // tests are misconfigured?
        const array = new Uint8Array([1, 2, 3]);
        const composite = new CompositeArrayBuffer(array);
        expectArraysEqual(new Uint8Array(composite.slice(0, 2)), [1, 2]);
    });
});
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* @license\n * Copyright 2023 Google LLC. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n * =============================================================================\n */\nimport {expectArraysEqual} from '../test_util';\nimport {CompositeArrayBuffer} from './composite_array_buffer';\n\ndescribe('CompositeArrayBuffer', () => {\n  const uniformBuffers = [\n    new Uint8Array([0, 1, 2, 3]).buffer,\n    new Uint8Array([4, 5, 6, 7]).buffer,\n    new Uint8Array([8, 9, 10, 11]).buffer,\n    new Uint8Array([12, 13, 14, 15]).buffer,\n    new Uint8Array([16]).buffer,\n  ];\n\n  const nonUniformBuffers = [\n    new Uint8Array([0, 1, 2]).buffer,\n    new Uint8Array([3, 4, 5, 6, 7]).buffer,\n    new Uint8Array([8, 9, 10, 11]).buffer,\n    new Uint8Array([12, 13, 14, 15, 16]).buffer,\n  ];\n\n  const bufferTestCases = [\n    ['uniform', uniformBuffers],\n    ['non-uniform', nonUniformBuffers]\n  ] as const;\n\n  for (const [buffersType, buffers] of bufferTestCases) {\n    let composite: CompositeArrayBuffer;\n    beforeEach(() => {\n      composite = new CompositeArrayBuffer(buffers);\n    });\n\n    it(`${buffersType}: slices across multiple buffers`, () => {\n      expectArraysEqual(new Uint8Array(composite.slice(1, 13)),\n                        [1,2,3,4,5,6,7,8,9,10,11,12]);\n    });\n\n    it(`${buffersType}: slices to the end of the array when \\'end\\' is not ` +\n      'specified', () => {\n        expectArraysEqual(new Uint8Array(composite.slice(5)),\n                          [5,6,7,8,9,10,11,12,13,14,15,16]);\n      });\n\n    it(`${buffersType}: makes a copy when slice() is called with no arguments`,\n       () => {\n         expectArraysEqual(new Uint8Array(composite.slice()),\n                           [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16]);\n       });\n\n    it(`${buffersType}: slices from zero when start is negative`, () => {\n      expectArraysEqual(new Uint8Array(composite.slice(-4, 5)),\n                        [0,1,2,3,4]);\n    });\n\n    it(`${buffersType}: slices to the end when end is greater than length`,\n       () => {\n         expectArraysEqual(new Uint8Array(composite.slice(7, 1000)),\n                           [7,8,9,10,11,12,13,14,15,16]);\n       });\n\n    it(`${buffersType}: slices multiple ranges out of order`, () => {\n      expectArraysEqual(new Uint8Array(composite.slice(13, 15)), [13, 14]);\n      expectArraysEqual(new Uint8Array(composite.slice(0, 2)), [0, 1]);\n      expectArraysEqual(new Uint8Array(composite.slice(9, 13)),\n                        [9, 10, 11, 12]);\n    });\n  }\n\n  it('can be created from an empty arraybuffer', () => {\n    const array = new Uint8Array([]);\n    const singleComposite = new CompositeArrayBuffer(array.buffer);\n    expectArraysEqual(new Uint8Array(singleComposite.slice()), []);\n  });\n\n  it('can be created from a single array', () => {\n    const array = new Uint8Array([1,2,3]);\n    const singleComposite = new CompositeArrayBuffer(array.buffer);\n    expectArraysEqual(new Uint8Array(singleComposite.slice()), array);\n  });\n\n  it('can be created from zero arrays', () => {\n    const singleComposite = new CompositeArrayBuffer([]);\n    expectArraysEqual(new Uint8Array(singleComposite.slice()),\n                      new Uint8Array());\n  });\n\n  it('can be created from undefined input', () => {\n    const singleComposite = new CompositeArrayBuffer();\n    expectArraysEqual(new Uint8Array(singleComposite.slice()),\n                      new Uint8Array());\n  });\n\n  it('treats NaN as zero when passed as the start of slice', () => {\n    const array = new Uint8Array([1,2,3]);\n    const composite = new CompositeArrayBuffer(array.buffer);\n    expectArraysEqual(new Uint8Array(composite.slice(NaN, 2)), [1,2]);\n  });\n\n  it('treats NaN as zero when passed as the end of slice', () => {\n    const array = new Uint8Array([1,2,3]);\n    const composite = new CompositeArrayBuffer(array.buffer);\n    expectArraysEqual(new Uint8Array(composite.slice(0, NaN)), []);\n  });\n\n  it('supports TypedArray input', () => {\n    // This support is necessary for some tests in tfjs-converter. Maybe those\n    // tests are misconfigured?\n    const array = new Uint8Array([1,2,3]);\n    const composite = new CompositeArrayBuffer(array);\n    expectArraysEqual(new Uint8Array(composite.slice(0, 2)), [1,2]);\n  });\n});\n"]}