routie dev init since i didn't adhere to any proper guidance up until now

frontend/node_modules/npm-run-all2/test/yarn.js

@@ -0,0 +1,62 @@
+/**
+ * @author Toru Nagashima
+ * @copyright 2016 Toru Nagashima. All rights reserved.
+ * See LICENSE file in root directory for full license.
+ */
+'use strict'
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+const assert = require('assert').strict
+const spawn = require('cross-spawn')
+const BufferStream = require('./lib/buffer-stream')
+const { result, removeResult } = require('./lib/util')
+
+// ------------------------------------------------------------------------------
+// Helpers
+// ------------------------------------------------------------------------------
+
+/**
+ * Execute a command.
+ * @param {string} command A command to execute.
+ * @param {string[]} args Arguments for the command.
+ * @returns {Promise<void>} The result of child process's stdout.
+ */
+function exec (command, args) {
+  return new Promise((resolve, reject) => {
+    const stderr = new BufferStream()
+    const cp = spawn(command, args, { stdio: ['ignore', 'ignore', 'pipe'] })
+
+    cp.stderr.pipe(stderr)
+    cp.on('exit', (exitCode) => {
+      if (exitCode) {
+        reject(new Error(`Exited with ${exitCode}: ${stderr.value}`))
+        return
+      }
+      resolve()
+    })
+    cp.on('error', reject)
+  })
+}
+
+const nodeVersion = Number(process.versions.node.split('.')[0])
+
+// ------------------------------------------------------------------------------
+// Test
+// ------------------------------------------------------------------------------
+
+;(nodeVersion >= 6 ? describe : xdescribe)('[yarn]', () => {
+  before(() => process.chdir('test-workspace'))
+  after(() => process.chdir('..'))
+
+  beforeEach(removeResult)
+
+  describe("'yarn run' command", () => {
+    it("should run 'npm-run-all' in scripts with yarn.", async () => {
+      await exec('yarn', ['run', 'test-task:yarn'])
+      assert(result() === 'aabb')
+    })
+  })
+})