Arguments: 
  /usr/local/Cellar/node/10.6.0/bin/node /usr/local/Cellar/yarn/1.5.1/libexec/bin/yarn.js test

PATH: 
  /usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/robinlinacre/Documents/javascript_projects/energy_usage/node_modules/.bin:/Users/robinlinacre/anaconda3/bin:/Users/robinlinacre/.local/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/usr/local/MacGPG2/bin:/opt/X11/bin

Yarn version: 
  1.5.1

Node version: 
  10.16.0

Platform: 
  darwin x64

npm manifest: 
  {
    "name": "@robinl/energy_usage",
    "version": "0.0.29",
    "description": "",
    "unpkg": "dist/energy_usage.js",
    "main": "dist/energy_usage.js",
    "jsdelivr": "dist/energy_usage.js",
    "module": "src/index.js",
    "scripts": {
      "pretest": "rollup -c",
      "test": "tape 'test/**/*-test.js' && eslint src",
      "prepublishOnly": "rm -rf dist && yarn test"
    },
    "repository": {
      "type": "git",
      "url": "git+https://github.com/RobinL/energy_usage.git"
    },
    "author": "Robin Linacre",
    "license": "MIT",
    "bugs": {
      "url": "https://github.com/RobinL/energy_usage/issues"
    },
    "devDependencies": {
      "almost-equal": "^1.1.0",
      "eslint": "^3.19.0",
      "rollup": "^1.15.6",
      "tape": "^4.10.2"
    },
    "homepage": "https://github.com/RobinL/energy_usage#readme"
  }

yarn manifest: 
  No manifest

Lockfile: 
  No lockfile

Trace: 
  Error: Command failed.
  Exit code: 1
  Command: sh
  Arguments: -c tape 'test/**/*-test.js' && eslint src
  Directory: /Users/robinlinacre/Documents/javascript_projects/energy_usage
  Output:
  
      at ProcessTermError.MessageError (/usr/local/Cellar/yarn/1.5.1/libexec/lib/cli.js:186:110)
      at new ProcessTermError (/usr/local/Cellar/yarn/1.5.1/libexec/lib/cli.js:226:113)
      at ChildProcess.<anonymous> (/usr/local/Cellar/yarn/1.5.1/libexec/lib/cli.js:30281:17)
      at ChildProcess.emit (events.js:198:13)
      at maybeClose (internal/child_process.js:982:16)
      at Process.ChildProcess._handle.onexit (internal/child_process.js:259:5)