.babelrc

{
  "presets": ["es2015", "power-assert"],
  "plugins": [
    ["fast-async", {
      "runtimePattern": null,
      "useRuntimeModule": true
    }],
    ["transform-react-jsx", { "pragma": "preact.h"}],
    ["transform-export-extensions"],
    ["transform-class-properties"],
    ["transform-object-rest-spread"],
    ["babel-plugin-espower", {
      "embedAst": true,
      "patterns": [
        "t.truthy(value, [message])",
        "t.falsy(value, [message])",
        "t.true(value, [message])",
        "t.false(value, [message])",
        "t.is(value, expected, [message])",
        "t.not(value, expected, [message])",
        "t.deepEqual(value, expected, [message])",
        "t.notDeepEqual(value, expected, [message])",
        "t.regex(contents, regex, [message])",
        "t.notRegex(contents, regex, [message])"
      ]
    }]
  ]
}