textToSpeech.test.js

/**
 * Copyright 2018, Google, Inc.
 * 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.
 */

'use strict';

const fs = require(`fs`);
const path = require(`path`);
const test = require(`ava`);
const tools = require(`@google-cloud/nodejs-repo-tools`);

const cmd = `node textToSpeech.js`;
const cwd = path.join(__dirname, `..`);
const text = `Hello there.`;
const ssml = `<?xml version="1.0"?>
<speak version="1.0" xmlns="http://www.w3.org/2001/10/synthesis"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.w3.org/2001/10/synthesis
http://www.w3.org/TR/speech-synthesis/synthesis.xsd" xml:lang="en-US">
Hello there.
</speak>`;
const outputFile = `test-output.mp3`;
const files = [
  `hello.txt`,
  `hello.ssml`,
].map(name => {
  return {
    name,
    localPath: path.resolve(path.join(__dirname, `../resources/${name}`)),
  };
});

test.before(tools.checkCredentials);

test.after.always(async () => {
  await fs.unlink(outputFile);
});

test(`should list voice`, async t => {
  const output = await tools.runAsync(
    `${cmd} list-voices`,
    cwd
  );
  t.true(output.includes(`SSML Gender: FEMALE`));
  t.true(output.includes(`Natural Sample Rate Hertz: 24000`));
});

test(`should synthesize audio from text`, async t => {
  t.false(fs.existsSync(outputFile));
  const output = await tools.runAsync(
    `${cmd} synthesize-text '${text}' --outputFile '${outputFile}'`,
    cwd
  );
  t.true(output.includes(`Saved synthesized text to local audio file ${outputFile}`));
  t.true(fs.existsSync(outputFile));
});

test(`should synthesize audio from ssml`, async t => {
  t.false(fs.existsSync(outputFile));
  const output = await tools.runAsync(
    `${cmd} synthesize-ssml '${ssml}' --outputFile '${outputFile}'`,
    cwd
  );
  t.true(output.includes(`Saved synthesized text to local audio file ${outputFile}`));
  t.true(fs.existsSync(outputFile));
});

test(`should synthesize audio from text file`, async t => {
  t.false(fs.existsSync(outputFile));
  const output = await tools.runAsync(
    `${cmd} synthesize-text-file '${files[0].localPath}' --outputFile '${outputFile}'`,
    cwd
  );
  t.true(output.includes(`Saved synthesized text to local audio file ${outputFile}`));
  t.true(fs.existsSync(outputFile));
});

test(`should synthesize audio from ssml file`, async t => {
  t.false(fs.existsSync(outputFile));
  const output = await tools.runAsync(
    `${cmd} synthesize-ssml-file '${files[1].localPath}' --outputFile '${outputFile}'`,
    cwd
  );
  t.true(output.includes(`Saved synthesized text to local audio file ${outputFile}`));
  t.true(fs.existsSync(outputFile));
});