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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 * as Arrow from 'apache-arrow';
const { BitIterator, getBool } = Arrow.util;
describe('Bits', () => {
test('BitIterator produces correct bits for single byte', () => {
const byte = new Uint8Array([0b11110000]);
expect([...new BitIterator(byte, 0, 8, null, getBool)]).toEqual(
[false, false, false, false, true, true, true, true]);
expect([...new BitIterator(byte, 2, 5, null, getBool)]).toEqual(
[false, false, true, true, true]);
});
test('BitIterator produces correct bits for multiple bytes', () => {
const byte = new Uint8Array([0b11110000, 0b10101010]);
expect([...new BitIterator(byte, 0, 16, null, getBool)]).toEqual(
[false, false, false, false, true, true, true, true,
false, true, false, true, false, true, false, true]);
expect([...new BitIterator(byte, 2, 11, null, getBool)]).toEqual(
[false, false, true, true, true, true,
false, true, false, true, false]);
});
});
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