install karma

* https://survivejs.com/webpack/techniques/testing/

7 files changed, 517 insertions, 1 deletions

diff --git a/karma.conf.js b/karma.conf.js
new file mode 100644
index 0000000..31aa581
--- /dev/null
+++ b/karma.conf.js
@@ -0,0 +1,19 @@
+const parts = require("./webpack.parts");
+
+module.exports = config => {
+  const tests = "tests/*.test.js";
+
+  config.set({
+    frameworks: ["mocha"],
+    files: [
+      {
+        pattern: tests,
+      },
+    ],
+    preprocessors: {
+      [tests]: ["webpack"],
+    },
+    webpack: parts.loadJavaScript(),
+    singleRun: true,
+  });
+};
diff --git a/package-lock.json b/package-lock.json
index c4abd4e..ed7f9b5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1361,6 +1361,12 @@
       "integrity": "sha1-FziZ0//Rx9k4PkR5Ul2+J4yrXys=",
       "dev": true
     },
+    "array-slice": {
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/array-slice/-/array-slice-0.2.3.tgz",
+      "integrity": "sha1-3Tz7gO15c6dRF82sabC5nshhhvU=",
+      "dev": true
+    },
     "array-union": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
@@ -2594,6 +2600,12 @@
         }
       }
     },
+    "browser-stdout": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
+      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
+      "dev": true
+    },
     "browserify": {
       "version": "16.2.3",
       "resolved": "https://registry.npmjs.org/browserify/-/browserify-16.2.3.tgz",
@@ -2788,6 +2800,28 @@
         "isarray": "^1.0.0"
       }
     },
+    "buffer-alloc": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/buffer-alloc/-/buffer-alloc-1.2.0.tgz",
+      "integrity": "sha512-CFsHQgjtW1UChdXgbyJGtnm+O/uLQeZdtbDo8mfUgYXCHSM1wgrVxXm6bSyrUuErEb+4sYVGCzASBRot7zyrow==",
+      "dev": true,
+      "requires": {
+        "buffer-alloc-unsafe": "^1.1.0",
+        "buffer-fill": "^1.0.0"
+      }
+    },
+    "buffer-alloc-unsafe": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/buffer-alloc-unsafe/-/buffer-alloc-unsafe-1.1.0.tgz",
+      "integrity": "sha512-TEM2iMIEQdJ2yjPJoSIsldnleVaAk1oW3DBVUykyOLsEsFmEc9kn+SFFPz+gl54KQNxlDnAwCXosOS9Okx2xAg==",
+      "dev": true
+    },
+    "buffer-fill": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/buffer-fill/-/buffer-fill-1.0.0.tgz",
+      "integrity": "sha1-+PeLdniYiO858gXNY39o5wISKyw=",
+      "dev": true
+    },
     "buffer-from": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.1.tgz",
@@ -2996,6 +3030,12 @@
         "safe-buffer": "^5.0.1"
       }
     },
+    "circular-json": {
+      "version": "0.5.7",
+      "resolved": "https://registry.npmjs.org/circular-json/-/circular-json-0.5.7.tgz",
+      "integrity": "sha512-/pXoV1JA847qRKPrHbBK6YIBGFF8GOP4wzSgUOA7q0ew0vAv0iJswP+2/nZQ9uzA3Azi7eTrg9L2yzXc/7ZMIA==",
+      "dev": true
+    },
     "class-utils": {
       "version": "0.3.6",
       "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
@@ -3135,6 +3175,15 @@
       "integrity": "sha1-FopHAXVran9RoSzgyXv6KMCE7WM=",
       "dev": true
     },
+    "combine-lists": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/combine-lists/-/combine-lists-1.0.1.tgz",
+      "integrity": "sha1-RYwH4J4NkA/Ci3Cj/sLazR0st/Y=",
+      "dev": true,
+      "requires": {
+        "lodash": "^4.5.0"
+      }
+    },
     "combine-source-map": {
       "version": "0.8.0",
       "resolved": "https://registry.npmjs.org/combine-source-map/-/combine-source-map-0.8.0.tgz",
@@ -3253,6 +3302,50 @@
         "typedarray": "^0.0.6"
       }
     },
+    "connect": {
+      "version": "3.6.6",
+      "resolved": "https://registry.npmjs.org/connect/-/connect-3.6.6.tgz",
+      "integrity": "sha1-Ce/2xVr3I24TcTWnJXSFi2eG9SQ=",
+      "dev": true,
+      "requires": {
+        "debug": "2.6.9",
+        "finalhandler": "1.1.0",
+        "parseurl": "~1.3.2",
+        "utils-merge": "1.0.1"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "2.6.9",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+          "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+          "dev": true,
+          "requires": {
+            "ms": "2.0.0"
+          }
+        },
+        "finalhandler": {
+          "version": "1.1.0",
+          "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.0.tgz",
+          "integrity": "sha1-zgtoVbRYU+eRsvzGgARtiCU91/U=",
+          "dev": true,
+          "requires": {
+            "debug": "2.6.9",
+            "encodeurl": "~1.0.1",
+            "escape-html": "~1.0.3",
+            "on-finished": "~2.3.0",
+            "parseurl": "~1.3.2",
+            "statuses": "~1.3.1",
+            "unpipe": "~1.0.0"
+          }
+        },
+        "statuses": {
+          "version": "1.3.1",
+          "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.3.1.tgz",
+          "integrity": "sha1-+vUbnrdKrvOzrPStX2Gr8ky3uT4=",
+          "dev": true
+        }
+      }
+    },
     "connect-history-api-fallback": {
       "version": "1.5.0",
       "resolved": "https://registry.npmjs.org/connect-history-api-fallback/-/connect-history-api-fallback-1.5.0.tgz",
@@ -3794,6 +3887,12 @@
         "array-find-index": "^1.0.1"
       }
     },
+    "custom-event": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/custom-event/-/custom-event-1.0.1.tgz",
+      "integrity": "sha1-XQKkaFCt8bSjF5RqOSj8y1v9BCU=",
+      "dev": true
+    },
     "cyclist": {
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/cyclist/-/cyclist-0.2.2.tgz",
@@ -3818,6 +3917,12 @@
         "assert-plus": "^1.0.0"
       }
     },
+    "date-format": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/date-format/-/date-format-1.2.0.tgz",
+      "integrity": "sha1-YV6CjiM90aubua4JUODOzPpuytg=",
+      "dev": true
+    },
     "date-now": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/date-now/-/date-now-0.1.4.tgz",
@@ -3995,6 +4100,18 @@
         }
       }
     },
+    "di": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/di/-/di-0.0.1.tgz",
+      "integrity": "sha1-gGZJMmzqp8qjMG112YXqJ0i6kTw=",
+      "dev": true
+    },
+    "diff": {
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-3.5.0.tgz",
+      "integrity": "sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==",
+      "dev": true
+    },
     "diffie-hellman": {
       "version": "5.0.3",
       "resolved": "https://registry.npmjs.org/diffie-hellman/-/diffie-hellman-5.0.3.tgz",
@@ -4048,6 +4165,18 @@
         }
       }
     },
+    "dom-serialize": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/dom-serialize/-/dom-serialize-2.2.1.tgz",
+      "integrity": "sha1-ViromZ9Evl6jB29UGdzVnrQ6yVs=",
+      "dev": true,
+      "requires": {
+        "custom-event": "~1.0.0",
+        "ent": "~2.2.0",
+        "extend": "^3.0.0",
+        "void-elements": "^2.0.0"
+      }
+    },
     "dom-serializer": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/dom-serializer/-/dom-serializer-0.1.0.tgz",
@@ -4243,6 +4372,12 @@
         "tapable": "^1.0.0"
       }
     },
+    "ent": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/ent/-/ent-2.2.0.tgz",
+      "integrity": "sha1-6WQhkyWiHQX0RGai9obtbOX13R0=",
+      "dev": true
+    },
     "entities": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/entities/-/entities-1.1.1.tgz",
@@ -4437,6 +4572,56 @@
         }
       }
     },
+    "expand-braces": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/expand-braces/-/expand-braces-0.1.2.tgz",
+      "integrity": "sha1-SIsdHSRRyz06axks/AMPRMWFX+o=",
+      "dev": true,
+      "requires": {
+        "array-slice": "^0.2.3",
+        "array-unique": "^0.2.1",
+        "braces": "^0.1.2"
+      },
+      "dependencies": {
+        "array-unique": {
+          "version": "0.2.1",
+          "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.2.1.tgz",
+          "integrity": "sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=",
+          "dev": true
+        },
+        "braces": {
+          "version": "0.1.5",
+          "resolved": "https://registry.npmjs.org/braces/-/braces-0.1.5.tgz",
+          "integrity": "sha1-wIVxEIUpHYt1/ddOqw+FlygHEeY=",
+          "dev": true,
+          "requires": {
+            "expand-range": "^0.1.0"
+          }
+        },
+        "expand-range": {
+          "version": "0.1.1",
+          "resolved": "https://registry.npmjs.org/expand-range/-/expand-range-0.1.1.tgz",
+          "integrity": "sha1-TLjtoJk8pW+k9B/ELzy7TMrf8EQ=",
+          "dev": true,
+          "requires": {
+            "is-number": "^0.1.1",
+            "repeat-string": "^0.2.2"
+          }
+        },
+        "is-number": {
+          "version": "0.1.1",
+          "resolved": "https://registry.npmjs.org/is-number/-/is-number-0.1.1.tgz",
+          "integrity": "sha1-aaevEWlj1HIG7JvZtIoUIW8eOAY=",
+          "dev": true
+        },
+        "repeat-string": {
+          "version": "0.2.2",
+          "resolved": "https://registry.npmjs.org/repeat-string/-/repeat-string-0.2.2.tgz",
+          "integrity": "sha1-x6jTI2BoNiBZp+RlH8aITosftK4=",
+          "dev": true
+        }
+      }
+    },
     "expand-brackets": {
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/expand-brackets/-/expand-brackets-2.1.4.tgz",
@@ -5723,6 +5908,12 @@
       "integrity": "sha1-Dovf5NHduIVNZOBOp8AOKgJuVlg=",
       "dev": true
     },
+    "growl": {
+      "version": "1.10.5",
+      "resolved": "https://registry.npmjs.org/growl/-/growl-1.10.5.tgz",
+      "integrity": "sha512-qBr4OuELkhPenW6goKVXiv47US3clb3/IbuWF9KNKEijAy9oeHxU9IgzjvJhHkUzhaj7rOUD7+YGWqUjLp5oSA==",
+      "dev": true
+    },
     "handle-thing": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/handle-thing/-/handle-thing-1.2.5.tgz",
@@ -6807,6 +6998,15 @@
       "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE=",
       "dev": true
     },
+    "isbinaryfile": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/isbinaryfile/-/isbinaryfile-3.0.3.tgz",
+      "integrity": "sha512-8cJBL5tTd2OS0dM4jz07wQd5g0dCCqIhUxPIGtZfa5L6hWlvV5MHTITy/DBAsF+Oe2LS1X3krBUhNwaGUWpWxw==",
+      "dev": true,
+      "requires": {
+        "buffer-alloc": "^1.2.0"
+      }
+    },
     "isexe": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/isexe/-/isexe-2.0.0.tgz",
@@ -6940,6 +7140,124 @@
         "verror": "1.10.0"
       }
     },
+    "karma": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/karma/-/karma-3.0.0.tgz",
+      "integrity": "sha512-ZTjyuDXVXhXsvJ1E4CnZzbCjSxD6sEdzEsFYogLuZM0yqvg/mgz+O+R1jb0J7uAQeuzdY8kJgx6hSNXLwFuHIQ==",
+      "dev": true,
+      "requires": {
+        "bluebird": "^3.3.0",
+        "body-parser": "^1.16.1",
+        "chokidar": "^2.0.3",
+        "colors": "^1.1.0",
+        "combine-lists": "^1.0.0",
+        "connect": "^3.6.0",
+        "core-js": "^2.2.0",
+        "di": "^0.0.1",
+        "dom-serialize": "^2.2.0",
+        "expand-braces": "^0.1.1",
+        "glob": "^7.1.1",
+        "graceful-fs": "^4.1.2",
+        "http-proxy": "^1.13.0",
+        "isbinaryfile": "^3.0.0",
+        "lodash": "^4.17.4",
+        "log4js": "^3.0.0",
+        "mime": "^2.3.1",
+        "minimatch": "^3.0.2",
+        "optimist": "^0.6.1",
+        "qjobs": "^1.1.4",
+        "range-parser": "^1.2.0",
+        "rimraf": "^2.6.0",
+        "safe-buffer": "^5.0.1",
+        "socket.io": "2.1.1",
+        "source-map": "^0.6.1",
+        "tmp": "0.0.33",
+        "useragent": "2.2.1"
+      },
+      "dependencies": {
+        "mime": {
+          "version": "2.3.1",
+          "resolved": "https://registry.npmjs.org/mime/-/mime-2.3.1.tgz",
+          "integrity": "sha512-OEUllcVoydBHGN1z84yfQDimn58pZNNNXgZlHXSboxMlFvgI6MXSWpWKpFRra7H1HxpVhHTkrghfRW49k6yjeg==",
+          "dev": true
+        },
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "dev": true
+        }
+      }
+    },
+    "karma-mocha": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/karma-mocha/-/karma-mocha-1.3.0.tgz",
+      "integrity": "sha1-7qrH/8DiAetjxGdEDStpx883eL8=",
+      "dev": true,
+      "requires": {
+        "minimist": "1.2.0"
+      },
+      "dependencies": {
+        "minimist": {
+          "version": "1.2.0",
+          "resolved": "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+          "dev": true
+        }
+      }
+    },
+    "karma-webpack": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/karma-webpack/-/karma-webpack-3.0.5.tgz",
+      "integrity": "sha512-nRudGJWstvVuA6Tbju9tyGUfXTtI1UXMXoRHVmM2/78D0q6s/Ye2IC157PKNDC15PWFGR0mVIRtWLAdcfsRJoA==",
+      "dev": true,
+      "requires": {
+        "async": "^2.0.0",
+        "babel-runtime": "^6.0.0",
+        "loader-utils": "^1.0.0",
+        "lodash": "^4.0.0",
+        "source-map": "^0.5.6",
+        "webpack-dev-middleware": "^2.0.6"
+      },
+      "dependencies": {
+        "async": {
+          "version": "2.6.1",
+          "resolved": "https://registry.npmjs.org/async/-/async-2.6.1.tgz",
+          "integrity": "sha512-fNEiL2+AZt6AlAw/29Cr0UDe4sRAHCpEHh54WMz+Bb7QfNcFw4h3loofyJpLeQs4Yx7yuqu/2dLgM5hKOs6HlQ==",
+          "dev": true,
+          "requires": {
+            "lodash": "^4.17.10"
+          }
+        },
+        "mime": {
+          "version": "2.3.1",
+          "resolved": "https://registry.npmjs.org/mime/-/mime-2.3.1.tgz",
+          "integrity": "sha512-OEUllcVoydBHGN1z84yfQDimn58pZNNNXgZlHXSboxMlFvgI6MXSWpWKpFRra7H1HxpVhHTkrghfRW49k6yjeg==",
+          "dev": true
+        },
+        "url-join": {
+          "version": "2.0.5",
+          "resolved": "https://registry.npmjs.org/url-join/-/url-join-2.0.5.tgz",
+          "integrity": "sha1-WvIvGMBSoACkjXuCxenC4v7tpyg=",
+          "dev": true
+        },
+        "webpack-dev-middleware": {
+          "version": "2.0.6",
+          "resolved": "http://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-2.0.6.tgz",
+          "integrity": "sha512-tj5LLD9r4tDuRIDa5Mu9lnY2qBBehAITv6A9irqXhw/HQquZgTx3BCd57zYbU2gMDnncA49ufK2qVQSbaKJwOw==",
+          "dev": true,
+          "requires": {
+            "loud-rejection": "^1.6.0",
+            "memory-fs": "~0.4.1",
+            "mime": "^2.1.0",
+            "path-is-absolute": "^1.0.0",
+            "range-parser": "^1.0.3",
+            "url-join": "^2.0.2",
+            "webpack-log": "^1.0.1"
+          }
+        }
+      }
+    },
     "killable": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/killable/-/killable-1.0.0.tgz",
@@ -7095,6 +7413,19 @@
         "chalk": "^2.0.1"
       }
     },
+    "log4js": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/log4js/-/log4js-3.0.5.tgz",
+      "integrity": "sha512-IX5c3G/7fuTtdr0JjOT2OIR12aTESVhsH6cEsijloYwKgcPRlO6DgOU72v0UFhWcoV1HN6+M3dwT89qVPLXm0w==",
+      "dev": true,
+      "requires": {
+        "circular-json": "^0.5.5",
+        "date-format": "^1.2.0",
+        "debug": "^3.1.0",
+        "rfdc": "^1.1.2",
+        "streamroller": "0.7.0"
+      }
+    },
     "loglevel": {
       "version": "1.6.1",
       "resolved": "https://registry.npmjs.org/loglevel/-/loglevel-1.6.1.tgz",
@@ -7422,6 +7753,59 @@
         "minimist": "0.0.8"
       }
     },
+    "mocha": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/mocha/-/mocha-5.2.0.tgz",
+      "integrity": "sha512-2IUgKDhc3J7Uug+FxMXuqIyYzH7gJjXECKe/w43IGgQHTSj3InJi+yAA7T24L9bQMRKiUEHxEX37G5JpVUGLcQ==",
+      "dev": true,
+      "requires": {
+        "browser-stdout": "1.3.1",
+        "commander": "2.15.1",
+        "debug": "3.1.0",
+        "diff": "3.5.0",
+        "escape-string-regexp": "1.0.5",
+        "glob": "7.1.2",
+        "growl": "1.10.5",
+        "he": "1.1.1",
+        "minimatch": "3.0.4",
+        "mkdirp": "0.5.1",
+        "supports-color": "5.4.0"
+      },
+      "dependencies": {
+        "commander": {
+          "version": "2.15.1",
+          "resolved": "http://registry.npmjs.org/commander/-/commander-2.15.1.tgz",
+          "integrity": "sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==",
+          "dev": true
+        },
+        "glob": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.2.tgz",
+          "integrity": "sha512-MJTUg1kjuLeQCJ+ccE4Vpa6kKVXkPYJ2mOCQyUuKLcLQsdrMCpBPUi8qVE6+YuaJkozeA9NusTAw3hLr8Xe5EQ==",
+          "dev": true,
+          "requires": {
+            "fs.realpath": "^1.0.0",
+            "inflight": "^1.0.4",
+            "inherits": "2",
+            "minimatch": "^3.0.4",
+            "once": "^1.3.0",
+            "path-is-absolute": "^1.0.0"
+          }
+        }
+      }
+    },
+    "mocha-loader": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/mocha-loader/-/mocha-loader-2.0.0.tgz",
+      "integrity": "sha512-WYFbhZGCCBmQOavgKo49aAdv4C7QEll+/WU/KhiIQNaegG4JSP362BGvXQkk9J+jd/8bV2PxgmD7LbFOXigtoA==",
+      "dev": true,
+      "requires": {
+        "css-loader": "^1.0.0",
+        "loader-utils": "^1.1.0",
+        "script-loader": "^0.7.2",
+        "style-loader": "^0.22.1"
+      }
+    },
     "module-deps": {
       "version": "6.1.0",
       "resolved": "https://registry.npmjs.org/module-deps/-/module-deps-6.1.0.tgz",
@@ -7954,6 +8338,16 @@
         "is-wsl": "^1.1.0"
       }
     },
+    "optimist": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/optimist/-/optimist-0.6.1.tgz",
+      "integrity": "sha1-2j6nRob6IaGaERwybpDrFaAZZoY=",
+      "dev": true,
+      "requires": {
+        "minimist": "~0.0.1",
+        "wordwrap": "~0.0.2"
+      }
+    },
     "optimize-css-assets-webpack-plugin": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/optimize-css-assets-webpack-plugin/-/optimize-css-assets-webpack-plugin-5.0.1.tgz",
@@ -9861,6 +10255,12 @@
       "integrity": "sha1-fjL3W0E4EpHQRhHxvxQQmsAGUdc=",
       "dev": true
     },
+    "qjobs": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/qjobs/-/qjobs-1.2.0.tgz",
+      "integrity": "sha512-8YOJEHtxpySA3fFDyCRxA+UUV+fA+rTWnuWvylOK/NCjhY+b4ocCtmu8TtsWb+mYeU+GCHf/S66KZF/AsteKHg==",
+      "dev": true
+    },
     "qs": {
       "version": "6.5.1",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.1.tgz",
@@ -9991,6 +10391,12 @@
         }
       }
     },
+    "raw-loader": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/raw-loader/-/raw-loader-0.5.1.tgz",
+      "integrity": "sha1-DD0L6u2KAclm2Xh793goElKpeao=",
+      "dev": true
+    },
     "react": {
       "version": "16.5.2",
       "resolved": "https://registry.npmjs.org/react/-/react-16.5.2.tgz",
@@ -10365,6 +10771,12 @@
         "css": "^2.0.0"
       }
     },
+    "rfdc": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/rfdc/-/rfdc-1.1.2.tgz",
+      "integrity": "sha512-92ktAgvZhBzYTIK0Mja9uen5q5J3NRVMoDkJL2VMwq6SXjVCgqvQeVP2XAaUY6HT+XpQYeLSjb3UoitBryKmdA==",
+      "dev": true
+    },
     "rgb-regex": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/rgb-regex/-/rgb-regex-1.0.1.tgz",
@@ -10591,6 +11003,15 @@
         "ajv-keywords": "^3.1.0"
       }
     },
+    "script-loader": {
+      "version": "0.7.2",
+      "resolved": "https://registry.npmjs.org/script-loader/-/script-loader-0.7.2.tgz",
+      "integrity": "sha512-UMNLEvgOAQuzK8ji8qIscM3GIrRCWN6MmMXGD4SD5l6cSycgGsCo0tX5xRnfQcoghqct0tjHjcykgI1PyBE2aA==",
+      "dev": true,
+      "requires": {
+        "raw-loader": "~0.5.1"
+      }
+    },
     "scss-tokenizer": {
       "version": "0.2.3",
       "resolved": "https://registry.npmjs.org/scss-tokenizer/-/scss-tokenizer-0.2.3.tgz",
@@ -11320,6 +11741,18 @@
         "readable-stream": "^2.0.2"
       }
     },
+    "streamroller": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/streamroller/-/streamroller-0.7.0.tgz",
+      "integrity": "sha512-WREzfy0r0zUqp3lGO096wRuUp7ho1X6uo/7DJfTlEi0Iv/4gT7YHqXDjKC2ioVGBZtE8QzsQD9nx1nIuoZ57jQ==",
+      "dev": true,
+      "requires": {
+        "date-format": "^1.2.0",
+        "debug": "^3.1.0",
+        "mkdirp": "^0.5.1",
+        "readable-stream": "^2.3.0"
+      }
+    },
     "string-width": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
@@ -12133,6 +12566,24 @@
       "integrity": "sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==",
       "dev": true
     },
+    "useragent": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/useragent/-/useragent-2.2.1.tgz",
+      "integrity": "sha1-z1k+9PLRdYdei7ZY6pLhik/QbY4=",
+      "dev": true,
+      "requires": {
+        "lru-cache": "2.2.x",
+        "tmp": "0.0.x"
+      },
+      "dependencies": {
+        "lru-cache": {
+          "version": "2.2.4",
+          "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-2.2.4.tgz",
+          "integrity": "sha1-bGWGGb7PFAMdDQtZSxYELOTcBj0=",
+          "dev": true
+        }
+      }
+    },
     "util": {
       "version": "0.10.4",
       "resolved": "https://registry.npmjs.org/util/-/util-0.10.4.tgz",
@@ -12224,6 +12675,12 @@
         "indexof": "0.0.1"
       }
     },
+    "void-elements": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-2.0.1.tgz",
+      "integrity": "sha1-wGavtYK7HLQSjWDqkjkulNXp2+w=",
+      "dev": true
+    },
     "watchpack": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-1.6.0.tgz",
@@ -12584,6 +13041,12 @@
         "string-width": "^1.0.2 || 2"
       }
     },
+    "wordwrap": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
+      "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc=",
+      "dev": true
+    },
     "worker-farm": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/worker-farm/-/worker-farm-1.6.0.tgz",
diff --git a/package.json b/package.json
index 070415e..560c29b 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,10 @@
     "build:ssr": "webpack --config webpack.ssr.js",
     "build:stats": "webpack --env production --json > stats.json",
     "start": "webpack-dev-server --env development",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "test:karma": "karma start",
+    "test:mocha": "mocha tests",
+    "test:mocha:watch": "webpack-dev-server --hot --config webpack.mocha.js"
   },
   "keywords": [],
   "author": "",
@@ -33,7 +36,12 @@
     "glob": "^7.1.3",
     "html-webpack-plugin": "^3.2.0",
     "i18n-webpack-plugin": "^1.0.0",
+    "karma": "^3.0.0",
+    "karma-mocha": "^1.3.0",
+    "karma-webpack": "^3.0.5",
     "mini-css-extract-plugin": "^0.4.1",
+    "mocha": "^5.2.0",
+    "mocha-loader": "^2.0.0",
     "node-sass": "^4.9.3",
     "optimize-css-assets-webpack-plugin": "^5.0.1",
     "postcss-loader": "^3.0.0",
diff --git a/tests/add.js b/tests/add.js
new file mode 100644
index 0000000..bf90601
--- /dev/null
+++ b/tests/add.js
@@ -0,0 +1 @@
+module.exports = (a, b) => a + b;
diff --git a/tests/add.test.js b/tests/add.test.js
new file mode 100644
index 0000000..1463362
--- /dev/null
+++ b/tests/add.test.js
@@ -0,0 +1,8 @@
+const assert = require('assert');
+const add = require('./add');
+
+describe("Demo", () => {
+  it("should add correctly", () => {
+    assert.equal(add(1, 1), 2);
+  });
+});
diff --git a/tests/index.js b/tests/index.js
new file mode 100644
index 0000000..67253fa
--- /dev/null
+++ b/tests/index.js
@@ -0,0 +1,4 @@
+if (module.host) {
+  const context = require.context("mocha-loader!./", false, /\.test.js$/);
+  context.keys().forEach(context);
+}
diff --git a/webpack.mocha.js b/webpack.mocha.js
new file mode 100644
index 0000000..cf5e2db
--- /dev/null
+++ b/webpack.mocha.js
@@ -0,0 +1,13 @@
+const path = require("path");
+const merge = require("webpack-merge");
+const parts = require("./webpack.parts");
+
+module.exports = merge([
+  parts.devServer(),
+  parts.page({
+    title: "Mocha demo",
+    entry: {
+      tests: path.join(__dirname, "tests"),
+    },
+  }),
+]);