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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 fs from 'fs';
import {
generateRandomTables,
// generateDictionaryTables
} from '../../data/tables';
import { ArrowIOTestHelper } from './helpers';
import { MessageReader, AsyncMessageReader } from 'apache-arrow';
for (const table of generateRandomTables([10, 20, 30])) {
const io = ArrowIOTestHelper.stream(table);
const name = `[\n ${table.schema.fields.join(',\n ')}\n]`;
const numMessages = table.chunks.reduce((numMessages, batch) => {
return numMessages +
/* recordBatch message */ 1 +
/* dictionary messages */ batch.dictionaries.size;
}, /* schema message */ 1);
const validate = validateMessageReader.bind(0, numMessages);
const validateAsync = validateAsyncMessageReader.bind(0, numMessages);
describe(`MessageReader (${name})`, () => {
describe(`should read all Messages`, () => {
test(`Uint8Array`, io.buffer(validate));
test(`Iterable`, io.iterable(validate));
});
});
describe(`AsyncMessageReader (${name})`, () => {
describe(`should read all Messages`, () => {
test('AsyncIterable', io.asyncIterable(validateAsync));
test('fs.FileHandle', io.fsFileHandle(validateAsync));
test('fs.ReadStream', io.fsReadableStream(validateAsync));
test('stream.Readable', io.nodeReadableStream(validateAsync));
test('whatwg.ReadableStream', io.whatwgReadableStream(validateAsync));
test('whatwg.ReadableByteStream', io.whatwgReadableByteStream(validateAsync));
});
});
}
export function validateMessageReader(numMessages: number, source: any) {
const reader = new MessageReader(source);
let index = 0;
for (let message of reader) {
if (index === 0) {
expect(message.isSchema()).toBe(true);
expect(message.bodyLength).toBe(0);
} else {
expect(message.isSchema()).toBe(false);
expect(message.isRecordBatch() || message.isDictionaryBatch()).toBe(true);
}
try {
expect(message.bodyLength % 8).toBe(0);
} catch (e) { throw new Error(`bodyLength: ${e}`); }
const body = reader.readMessageBody(message.bodyLength);
expect(body).toBeInstanceOf(Uint8Array);
expect(body.byteLength).toBe(message.bodyLength);
expect(index++).toBeLessThan(numMessages);
}
expect(index).toBe(numMessages);
reader.return();
}
export async function validateAsyncMessageReader(numMessages: number, source: any) {
const reader = new AsyncMessageReader(source);
let index = 0;
for await (let message of reader) {
if (index === 0) {
expect(message.isSchema()).toBe(true);
expect(message.bodyLength).toBe(0);
} else {
expect(message.isSchema()).toBe(false);
expect(message.isRecordBatch() || message.isDictionaryBatch()).toBe(true);
}
try {
expect(message.bodyLength % 8).toBe(0);
} catch (e) { throw new Error(`bodyLength: ${e}`); }
const body = await reader.readMessageBody(message.bodyLength);
expect(body).toBeInstanceOf(Uint8Array);
expect(body.byteLength).toBe(message.bodyLength);
expect(index++).toBeLessThan(numMessages);
}
expect(index).toBe(numMessages);
await reader.return();
}
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