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fixtures.ts
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fixtures.ts
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/**
* Copyright 2017 Google Inc. 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 {test, Test} from 'ava';
import * as fs from 'fs';
import * as makeDir from 'make-dir';
import * as path from 'path';
import * as pify from 'pify';
import * as tmp from 'tmp';
const writeFilep = pify(fs.writeFile);
export interface Fixtures {
// If string, we create a file with that string contents. If fixture, we
// create a subdirectory and recursively install the fixture.
// TODO: support buffers to allow non-text files.
[name: string]: string|Fixtures;
}
async function setupFixtures(dir: string, fixtures: Fixtures) {
await makeDir(dir);
const keys = Object.keys(fixtures);
for (const key of keys) {
const filePath = path.join(dir, key);
if (typeof fixtures[key] === 'string') {
const contents = fixtures[key] as string;
await writeFilep(filePath, contents);
} else {
const fixture = fixtures[key] as Fixtures;
await setupFixtures(filePath, fixture);
}
}
}
export async function withFixtures(
fixtures: Fixtures, fn: (fixturesDir: string) => Promise<{}|void>) {
const keep = !!process.env.GTS_KEEP_TEMPDIRS;
const dir = tmp.dirSync({keep, unsafeCleanup: true});
await setupFixtures(dir.name, fixtures);
const origDir = process.cwd();
process.chdir(dir.name);
const result = await fn(dir.name);
process.chdir(origDir);
if (!keep) {
dir.removeCallback();
}
return result;
}