diff --git a/.gitignore b/.gitignore
index 491fc35..0c57575 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 node_modules
 lib
+coverage
+.nyc_output
+.vscode
diff --git a/docs/04-unit-and-integration-tests.md b/docs/04-unit-and-integration-tests.md
new file mode 100644
index 0000000..f71cdb0
--- /dev/null
+++ b/docs/04-unit-and-integration-tests.md
@@ -0,0 +1,8 @@
+## 04 – Unit and Integration Tests
+
+Let's test our service implementations, endpoint functions, middlewares and all other kinds of code through unit tests.
+Also handling integration tests in the sense of doing HTTP requests against the running service. Try it out:
+
+1. `npm test` – Will run Prettier check, unit tests, and NPM security audit of dependencies
+2. `npm run test:unit` – Runs only the unit tests
+3. `npm run test:integration` (start server manually before) – Executes the ingration tests on top of the running service
diff --git a/package-lock.json b/package-lock.json
index 44d9b9d..c118312 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,42 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@sinonjs/commons": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/@sinonjs/commons/-/commons-1.4.0.tgz",
+      "integrity": "sha512-9jHK3YF/8HtJ9wCAbG+j8cD0i0+ATS9A7gXFqS36TblLPNy6rEEc+SB0imo91eCboGaBYGV/MT1/br/J+EE7Tw==",
+      "dev": true,
+      "requires": {
+        "type-detect": "4.0.8"
+      }
+    },
+    "@sinonjs/formatio": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/@sinonjs/formatio/-/formatio-3.2.1.tgz",
+      "integrity": "sha512-tsHvOB24rvyvV2+zKMmPkZ7dXX6LSLKZ7aOtXY6Edklp0uRcgGpOsQTTGTcWViFyx4uhWc6GV8QdnALbIbIdeQ==",
+      "dev": true,
+      "requires": {
+        "@sinonjs/commons": "^1",
+        "@sinonjs/samsam": "^3.1.0"
+      }
+    },
+    "@sinonjs/samsam": {
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/@sinonjs/samsam/-/samsam-3.3.1.tgz",
+      "integrity": "sha512-wRSfmyd81swH0hA1bxJZJ57xr22kC07a1N4zuIL47yTS04bDk6AoCkczcqHEjcRPmJ+FruGJ9WBQiJwMtIElFw==",
+      "dev": true,
+      "requires": {
+        "@sinonjs/commons": "^1.0.2",
+        "array-from": "^2.1.1",
+        "lodash": "^4.17.11"
+      }
+    },
+    "@sinonjs/text-encoding": {
+      "version": "0.7.1",
+      "resolved": "https://registry.npmjs.org/@sinonjs/text-encoding/-/text-encoding-0.7.1.tgz",
+      "integrity": "sha512-+iTbntw2IZPb/anVDbypzfQa+ay64MW0Zo8aJ8gZPWMMK6/OubMVb6lUPMagqjOPnmtauXnFCACVl3O7ogjeqQ==",
+      "dev": true
+    },
     "@types/body-parser": {
       "version": "1.17.0",
       "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.17.0.tgz",
@@ -14,6 +50,39 @@
         "@types/node": "*"
       }
     },
+    "@types/chai": {
+      "version": "4.1.7",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.1.7.tgz",
+      "integrity": "sha512-2Y8uPt0/jwjhQ6EiluT0XCri1Dbplr0ZxfFXUz+ye13gaqE8u5gL5ppao1JrUYr9cIip5S6MvQzBS7Kke7U9VA==",
+      "dev": true
+    },
+    "@types/chai-as-promised": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@types/chai-as-promised/-/chai-as-promised-7.1.0.tgz",
+      "integrity": "sha512-MFiW54UOSt+f2bRw8J7LgQeIvE/9b4oGvwU7XW30S9QGAiHGnU/fmiOprsyMkdmH2rl8xSPc0/yrQw8juXU6bQ==",
+      "dev": true,
+      "requires": {
+        "@types/chai": "*"
+      }
+    },
+    "@types/chai-string": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/@types/chai-string/-/chai-string-1.4.1.tgz",
+      "integrity": "sha512-aRNMs6TKgjgPlCHwDfq/YNy5VtRR2hJ4AUWByddrT0TRVVD8eX4MiHW6/iHvmQHRlVuuPZcwnTUE7b4yFt7bEA==",
+      "dev": true,
+      "requires": {
+        "@types/chai": "*"
+      }
+    },
+    "@types/chai-subset": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/@types/chai-subset/-/chai-subset-1.3.1.tgz",
+      "integrity": "sha512-Aof+FLfWzBPzDgJ2uuBuPNOBHVx9Siyw4vmOcsMgsuxX1nfUWSlzpq4pdvQiaBgGjGS7vP/Oft5dpJbX4krT1A==",
+      "dev": true,
+      "requires": {
+        "@types/chai": "*"
+      }
+    },
     "@types/compression": {
       "version": "0.0.35",
       "resolved": "https://registry.npmjs.org/@types/compression/-/compression-0.0.35.tgz",
@@ -41,6 +110,12 @@
         "@types/express": "*"
       }
     },
+    "@types/cookiejar": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/@types/cookiejar/-/cookiejar-2.1.1.tgz",
+      "integrity": "sha512-aRnpPa7ysx3aNW60hTiCtLHlQaIFsXFCgQlpakNgDNVFzbtusSY8PwjAQgRWfSk0ekNoBjO51eQRB6upA9uuyw==",
+      "dev": true
+    },
     "@types/express": {
       "version": "4.11.1",
       "resolved": "https://registry.npmjs.org/@types/express/-/express-4.11.1.tgz",
@@ -68,6 +143,12 @@
       "integrity": "sha512-FwI9gX75FgVBJ7ywgnq/P7tw+/o1GUbtP0KzbtusLigAOgIgNISRK0ZPl4qertvXSIE8YbsVJueQ90cDt9YYyw==",
       "dev": true
     },
+    "@types/mocha": {
+      "version": "5.2.5",
+      "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-5.2.5.tgz",
+      "integrity": "sha512-lAVp+Kj54ui/vLUFxsJTMtWvZraZxum3w3Nwkble2dNuV5VnPA+Mi2oGX9XYJAaIvZi3tn3cbjS/qcJXRb6Bww==",
+      "dev": true
+    },
     "@types/node": {
       "version": "11.13.4",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-11.13.4.tgz",
@@ -90,6 +171,41 @@
         "@types/mime": "*"
       }
     },
+    "@types/sinon": {
+      "version": "7.0.11",
+      "resolved": "https://registry.npmjs.org/@types/sinon/-/sinon-7.0.11.tgz",
+      "integrity": "sha512-6ee09Ugx6GyEr0opUIakmxIWFNmqYPjkqa3/BuxCBokA0klsOLPgMD5K4q40lH7/yZVuJVzOfQpd7pipwjngkQ==",
+      "dev": true
+    },
+    "@types/sinon-chai": {
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/@types/sinon-chai/-/sinon-chai-3.2.2.tgz",
+      "integrity": "sha512-5zSs2AslzyPZdOsbm2NRtuSNAI2aTWzNKOHa/GRecKo7a5efYD7qGcPxMZXQDayVXT2Vnd5waXxBvV31eCZqiA==",
+      "dev": true,
+      "requires": {
+        "@types/chai": "*",
+        "@types/sinon": "*"
+      }
+    },
+    "@types/superagent": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/@types/superagent/-/superagent-4.1.1.tgz",
+      "integrity": "sha512-NetXrraTWPcdGG6IwYJhJ5esUGx8AYNiozbc1ENWEsF6BsD4JmNODJczI6Rm1xFPVp6HZESds9YCfqz4zIsM6A==",
+      "dev": true,
+      "requires": {
+        "@types/cookiejar": "*",
+        "@types/node": "*"
+      }
+    },
+    "@types/supertest": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/@types/supertest/-/supertest-2.0.4.tgz",
+      "integrity": "sha512-0TvOJ+6XVMSImgqc2ClNllfVffCxHQhFbsbwOGzGTjdFydoaG052LPqnP8SnmSlnokOcQiPPcbz+Yi30LxWPyA==",
+      "dev": true,
+      "requires": {
+        "@types/superagent": "*"
+      }
+    },
     "accepts": {
       "version": "1.3.5",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
@@ -99,17 +215,52 @@
         "negotiator": "0.6.1"
       }
     },
+    "ansi-regex": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+      "dev": true
+    },
+    "ansi-styles": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
+      "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
+      "dev": true
+    },
     "array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
     },
+    "array-from": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/array-from/-/array-from-2.1.1.tgz",
+      "integrity": "sha1-z+nYwmYoudxa7MYqn12PHzUsEZU=",
+      "dev": true
+    },
     "arrify": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
       "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
       "dev": true
     },
+    "assertion-error": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
+      "integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==",
+      "dev": true
+    },
+    "asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
+    },
+    "balanced-match": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+      "dev": true
+    },
     "body-parser": {
       "version": "1.18.3",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.3.tgz",
@@ -127,6 +278,22 @@
         "type-is": "~1.6.16"
       }
     },
+    "brace-expansion": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dev": true,
+      "requires": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "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
+    },
     "buffer-from": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.1.tgz",
@@ -138,6 +305,93 @@
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.0.0.tgz",
       "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg="
     },
+    "chai": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.2.0.tgz",
+      "integrity": "sha512-XQU3bhBukrOsQCuwZndwGcCVQHyZi53fQ6Ys1Fym7E4olpIqqZZhhoFJoaKVvV17lWQoXYwgWN2nF5crA8J2jw==",
+      "dev": true,
+      "requires": {
+        "assertion-error": "^1.1.0",
+        "check-error": "^1.0.2",
+        "deep-eql": "^3.0.1",
+        "get-func-name": "^2.0.0",
+        "pathval": "^1.1.0",
+        "type-detect": "^4.0.5"
+      }
+    },
+    "chai-as-promised": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/chai-as-promised/-/chai-as-promised-7.1.1.tgz",
+      "integrity": "sha512-azL6xMoi+uxu6z4rhWQ1jbdUhOMhis2PvscD/xjLqNMkv3BPPp2JyyuTHOrf9BOosGpNQ11v6BKv/g57RXbiaA==",
+      "dev": true,
+      "requires": {
+        "check-error": "^1.0.2"
+      }
+    },
+    "chai-shallow-deep-equal": {
+      "version": "1.4.6",
+      "resolved": "https://registry.npmjs.org/chai-shallow-deep-equal/-/chai-shallow-deep-equal-1.4.6.tgz",
+      "integrity": "sha1-QYS1oTOTra40ts7wxptazILE2DQ=",
+      "dev": true
+    },
+    "chai-string": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/chai-string/-/chai-string-1.5.0.tgz",
+      "integrity": "sha512-sydDC3S3pNAQMYwJrs6dQX0oBQ6KfIPuOZ78n7rocW0eJJlsHPh2t3kwW7xfwYA/1Bf6/arGtSUo16rxR2JFlw==",
+      "dev": true
+    },
+    "chai-subset": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/chai-subset/-/chai-subset-1.6.0.tgz",
+      "integrity": "sha1-pdDKFOMpp5WW7XAFi2ZGvWmIz+k=",
+      "dev": true
+    },
+    "chalk": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+      "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
+      "dev": true,
+      "requires": {
+        "ansi-styles": "^2.2.1",
+        "escape-string-regexp": "^1.0.2",
+        "has-ansi": "^2.0.0",
+        "strip-ansi": "^3.0.0",
+        "supports-color": "^2.0.0"
+      },
+      "dependencies": {
+        "supports-color": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
+          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
+          "dev": true
+        }
+      }
+    },
+    "check-error": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/check-error/-/check-error-1.0.2.tgz",
+      "integrity": "sha1-V00xLt2Iu13YkS6Sht1sCu1KrII=",
+      "dev": true
+    },
+    "combined-stream": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.7.tgz",
+      "integrity": "sha512-brWl9y6vOB1xYPZcpZde3N9zDByXTosAeMDo4p1wzo6UMOX4vumB+TP1RZ76sfE6Md68Q0NJSrE/gbezd4Ul+w==",
+      "requires": {
+        "delayed-stream": "~1.0.0"
+      }
+    },
+    "commander": {
+      "version": "2.15.1",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.15.1.tgz",
+      "integrity": "sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==",
+      "dev": true
+    },
+    "component-emitter": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
+      "integrity": "sha512-Rd3se6QB+sO1TwqZjscQrurpEPIfO0/yYnSin6Q/rD3mOutHvUrCAhJub3r90uNb+SESBuE0QYoB90YdfatsRg=="
+    },
     "compressible": {
       "version": "2.0.16",
       "resolved": "https://registry.npmjs.org/compressible/-/compressible-2.0.16.tgz",
@@ -167,6 +421,12 @@
         }
       }
     },
+    "concat-map": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
+      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
+      "dev": true
+    },
     "connect-datadog": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/connect-datadog/-/connect-datadog-0.0.6.tgz",
@@ -204,6 +464,22 @@
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
       "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
     },
+    "cookiejar": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.2.tgz",
+      "integrity": "sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA=="
+    },
+    "core-util-is": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
+    },
+    "data-uri-to-buffer": {
+      "version": "0.0.4",
+      "resolved": "https://registry.npmjs.org/data-uri-to-buffer/-/data-uri-to-buffer-0.0.4.tgz",
+      "integrity": "sha1-RuE6udqOMJdFyNAc5UchPr2y/j8=",
+      "dev": true
+    },
     "debug": {
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -212,6 +488,20 @@
         "ms": "2.0.0"
       }
     },
+    "deep-eql": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-3.0.1.tgz",
+      "integrity": "sha512-+QeIQyN5ZuO+3Uk5DYh6/1eKO0m0YmJFGNmFHGACpf1ClL1nmlV/p4gNgbl2pJGxgXb4faqo6UE+M5ACEMyVcw==",
+      "dev": true,
+      "requires": {
+        "type-detect": "^4.0.0"
+      }
+    },
+    "delayed-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+      "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
+    },
     "depd": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
@@ -243,6 +533,12 @@
       "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
       "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
     },
+    "escape-string-regexp": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
+      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
+      "dev": true
+    },
     "etag": {
       "version": "1.8.1",
       "resolved": "https://registry.npmjs.org/etag/-/etag-1.8.1.tgz",
@@ -285,6 +581,20 @@
         "vary": "~1.1.2"
       }
     },
+    "expressmocks": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/expressmocks/-/expressmocks-0.1.3.tgz",
+      "integrity": "sha512-ucSa/ncl/tJ32b8dOhGb9zuCnKaFU5GN8GYCcYmTkGkCJukEZATksV8eFBxhUm6a32YAwFxaeeCz5WOG1s4JzA==",
+      "dev": true,
+      "requires": {
+        "chai": ">=4.0.0"
+      }
+    },
+    "extend": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
+      "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g=="
+    },
     "finalhandler": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.1.tgz",
@@ -299,6 +609,21 @@
         "unpipe": "~1.0.0"
       }
     },
+    "form-data": {
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.3.3.tgz",
+      "integrity": "sha512-1lLKB2Mu3aGP1Q/2eCOx0fNbRMe7XdwktwOruhfqqd0rIJWwN4Dh+E3hrPSlDCXnSR7UtZ1N38rVXm+6+MEhJQ==",
+      "requires": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.6",
+        "mime-types": "^2.1.12"
+      }
+    },
+    "formidable": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/formidable/-/formidable-1.2.1.tgz",
+      "integrity": "sha512-Fs9VRguL0gqGHkXS5GQiMCr1VhZBxz0JnJs4JmMp/2jL18Fmbzvv7vOFRU+U8TBkHEE/CX1qDXzJplVULgsLeg=="
+    },
     "forwarded": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.1.2.tgz",
@@ -309,6 +634,65 @@
       "resolved": "https://registry.npmjs.org/fresh/-/fresh-0.5.2.tgz",
       "integrity": "sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac="
     },
+    "fs.realpath": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
+      "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
+      "dev": true
+    },
+    "get-func-name": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/get-func-name/-/get-func-name-2.0.0.tgz",
+      "integrity": "sha1-6td0q+5y4gQJQzoGY2YCPdaIekE=",
+      "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"
+      }
+    },
+    "graceful-fs": {
+      "version": "4.1.15",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.15.tgz",
+      "integrity": "sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA==",
+      "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
+    },
+    "has-ansi": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/has-ansi/-/has-ansi-2.0.0.tgz",
+      "integrity": "sha1-NPUEnOHs3ysGSa8+8k5F7TVBbZE=",
+      "dev": true,
+      "requires": {
+        "ansi-regex": "^2.0.0"
+      }
+    },
+    "has-flag": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+      "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
+      "dev": true
+    },
+    "he": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/he/-/he-1.1.1.tgz",
+      "integrity": "sha1-k0EP0hsAlzUVH4howvJx80J+I/0=",
+      "dev": true
+    },
     "hot-shots": {
       "version": "4.8.0",
       "resolved": "https://registry.npmjs.org/hot-shots/-/hot-shots-4.8.0.tgz",
@@ -338,6 +722,16 @@
         "safer-buffer": ">= 2.1.2 < 3"
       }
     },
+    "inflight": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
+      "integrity": "sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=",
+      "dev": true,
+      "requires": {
+        "once": "^1.3.0",
+        "wrappy": "1"
+      }
+    },
     "inherits": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
@@ -348,6 +742,30 @@
       "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.0.tgz",
       "integrity": "sha512-M4Sjn6N/+O6/IXSJseKqHoFc+5FdGJ22sXqnjTpdZweHK64MzEPAyQZyEU3R/KRv2GLoa7nNtg/C2Ev6m7z+eA=="
     },
+    "isarray": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
+      "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
+      "dev": true
+    },
+    "just-extend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/just-extend/-/just-extend-4.0.2.tgz",
+      "integrity": "sha512-FrLwOgm+iXrPV+5zDU6Jqu4gCRXbWEQg2O3SKONsWE4w7AXFRkryS53bpWdaL9cNol+AmR3AEYz6kn+o0fCPnw==",
+      "dev": true
+    },
+    "lodash": {
+      "version": "4.17.11",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
+      "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==",
+      "dev": true
+    },
+    "lolex": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/lolex/-/lolex-3.1.0.tgz",
+      "integrity": "sha512-zFo5MgCJ0rZ7gQg69S4pqBsLURbFw11X68C18OcJjJQbqaXm2NoTrGl1IMM3TIz0/BnN1tIs2tzmmqvCsOMMjw==",
+      "dev": true
+    },
     "make-error": {
       "version": "1.3.5",
       "resolved": "https://registry.npmjs.org/make-error/-/make-error-1.3.5.tgz",
@@ -387,6 +805,15 @@
         "mime-db": "~1.38.0"
       }
     },
+    "minimatch": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
+      "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+      "dev": true,
+      "requires": {
+        "brace-expansion": "^1.1.7"
+      }
+    },
     "minimist": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
@@ -410,6 +837,61 @@
         }
       }
     },
+    "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": {
+        "debug": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
+          "dev": true,
+          "requires": {
+            "ms": "2.0.0"
+          }
+        }
+      }
+    },
+    "mocha-better-spec-reporter": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/mocha-better-spec-reporter/-/mocha-better-spec-reporter-3.1.0.tgz",
+      "integrity": "sha1-tGLTkmS5AezyDIyaRpJHRSpXn44=",
+      "dev": true,
+      "requires": {
+        "chalk": "1.1.3",
+        "data-uri-to-buffer": "0.0.4",
+        "diff": "^3.1.0",
+        "graceful-fs": "^4.1.3",
+        "minimatch": "^3.0.3",
+        "should-format": "^3.0.2",
+        "should-type": "^1.4.0",
+        "source-map": "^0.5.6",
+        "stack-trace": "0.0.9"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
+        }
+      }
+    },
     "ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -420,6 +902,36 @@
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.1.tgz",
       "integrity": "sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk="
     },
+    "nise": {
+      "version": "1.4.10",
+      "resolved": "https://registry.npmjs.org/nise/-/nise-1.4.10.tgz",
+      "integrity": "sha512-sa0RRbj53dovjc7wombHmVli9ZihXbXCQ2uH3TNm03DyvOSIQbxg+pbqDKrk2oxMK1rtLGVlKxcB9rrc6X5YjA==",
+      "dev": true,
+      "requires": {
+        "@sinonjs/formatio": "^3.1.0",
+        "@sinonjs/text-encoding": "^0.7.1",
+        "just-extend": "^4.0.2",
+        "lolex": "^2.3.2",
+        "path-to-regexp": "^1.7.0"
+      },
+      "dependencies": {
+        "lolex": {
+          "version": "2.7.5",
+          "resolved": "https://registry.npmjs.org/lolex/-/lolex-2.7.5.tgz",
+          "integrity": "sha512-l9x0+1offnKKIzYVjyXU2SiwhXDLekRzKyhnbyldPHvC7BvLPVpdNUNR2KeMAiCN2D/kLNttZgQD5WjSxuBx3Q==",
+          "dev": true
+        },
+        "path-to-regexp": {
+          "version": "1.7.0",
+          "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-1.7.0.tgz",
+          "integrity": "sha1-Wf3g9DW62suhA6hOnTvGTpa5k30=",
+          "dev": true,
+          "requires": {
+            "isarray": "0.0.1"
+          }
+        }
+      }
+    },
     "node-dogstatsd": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/node-dogstatsd/-/node-dogstatsd-0.0.6.tgz",
@@ -438,22 +950,48 @@
       "resolved": "https://registry.npmjs.org/on-headers/-/on-headers-1.0.2.tgz",
       "integrity": "sha512-pZAE+FJLoyITytdqK0U5s+FIpjN0JP3OzFi/u8Rx+EV5/W+JTWGXG8xFzevE7AjBfDqHv/8vL8qQsIhHnqRkrA=="
     },
+    "once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "dev": true,
+      "requires": {
+        "wrappy": "1"
+      }
+    },
     "parseurl": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
       "integrity": "sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ=="
     },
+    "path-is-absolute": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+      "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
+      "dev": true
+    },
     "path-to-regexp": {
       "version": "0.1.7",
       "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
       "integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w="
     },
+    "pathval": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/pathval/-/pathval-1.1.0.tgz",
+      "integrity": "sha1-uULm1L3mUwBe9rcTYd74cn0GReA=",
+      "dev": true
+    },
     "prettier": {
       "version": "1.17.0",
       "resolved": "https://registry.npmjs.org/prettier/-/prettier-1.17.0.tgz",
       "integrity": "sha512-sXe5lSt2WQlCbydGETgfm1YBShgOX4HxQkFPvbxkcwgDvGDeqVau8h+12+lmSVlP3rHPz0oavfddSZg/q+Szjw==",
       "dev": true
     },
+    "process-nextick-args": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.0.tgz",
+      "integrity": "sha512-MtEC1TqN0EU5nephaJ4rAtThHtC86dNN9qCuEhtshvpVBkAW5ZO7BASN9REnF9eoXGcRub+pFuKEpOHE+HbEMw=="
+    },
     "proxy-addr": {
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.5.tgz",
@@ -484,6 +1022,27 @@
         "unpipe": "1.0.0"
       }
     },
+    "readable-stream": {
+      "version": "2.3.6",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+      "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+      "requires": {
+        "core-util-is": "~1.0.0",
+        "inherits": "~2.0.3",
+        "isarray": "~1.0.0",
+        "process-nextick-args": "~2.0.0",
+        "safe-buffer": "~5.1.1",
+        "string_decoder": "~1.1.1",
+        "util-deprecate": "~1.0.1"
+      },
+      "dependencies": {
+        "isarray": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
+          "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
+        }
+      }
+    },
     "safe-buffer": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
@@ -530,6 +1089,70 @@
       "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.0.tgz",
       "integrity": "sha512-BvE/TwpZX4FXExxOxZyRGQQv651MSwmWKZGqvmPcRIjDqWub67kTKuIMx43cZZrS/cBBzwBcNDWoFxt2XEFIpQ=="
     },
+    "should-format": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/should-format/-/should-format-3.0.3.tgz",
+      "integrity": "sha1-m/yPdPo5IFxT04w01xcwPidxJPE=",
+      "dev": true,
+      "requires": {
+        "should-type": "^1.3.0",
+        "should-type-adaptors": "^1.0.1"
+      }
+    },
+    "should-type": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/should-type/-/should-type-1.4.0.tgz",
+      "integrity": "sha1-B1bYzoRt/QmEOmlHcZ36DUz/XPM=",
+      "dev": true
+    },
+    "should-type-adaptors": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/should-type-adaptors/-/should-type-adaptors-1.1.0.tgz",
+      "integrity": "sha512-JA4hdoLnN+kebEp2Vs8eBe9g7uy0zbRo+RMcU0EsNy+R+k049Ki+N5tT5Jagst2g7EAja+euFuoXFCa8vIklfA==",
+      "dev": true,
+      "requires": {
+        "should-type": "^1.3.0",
+        "should-util": "^1.0.0"
+      }
+    },
+    "should-util": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/should-util/-/should-util-1.0.0.tgz",
+      "integrity": "sha1-yYzaN0qmsZDfi6h8mInCtNtiAGM=",
+      "dev": true
+    },
+    "sinon": {
+      "version": "7.2.2",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-7.2.2.tgz",
+      "integrity": "sha512-WLagdMHiEsrRmee3jr6IIDntOF4kbI6N2pfbi8wkv50qaUQcBglkzkjtoOEbeJ2vf1EsrHhLI+5Ny8//WHdMoA==",
+      "dev": true,
+      "requires": {
+        "@sinonjs/commons": "^1.2.0",
+        "@sinonjs/formatio": "^3.1.0",
+        "@sinonjs/samsam": "^3.0.2",
+        "diff": "^3.5.0",
+        "lolex": "^3.0.0",
+        "nise": "^1.4.7",
+        "supports-color": "^5.5.0"
+      },
+      "dependencies": {
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
+      }
+    },
+    "sinon-chai": {
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/sinon-chai/-/sinon-chai-3.3.0.tgz",
+      "integrity": "sha512-r2JhDY7gbbmh5z3Q62pNbrjxZdOAjpsqW/8yxAZRSqLZqowmfGZPGUZPFf3UX36NLis0cv8VEM5IJh9HgkSOAA==",
+      "dev": true
+    },
     "source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -546,11 +1169,84 @@
         "source-map": "^0.6.0"
       }
     },
+    "stack-trace": {
+      "version": "0.0.9",
+      "resolved": "https://registry.npmjs.org/stack-trace/-/stack-trace-0.0.9.tgz",
+      "integrity": "sha1-qPbq7KkGdMMz58Q5U/J1tFFRBpU=",
+      "dev": true
+    },
     "statuses": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.4.0.tgz",
       "integrity": "sha512-zhSCtt8v2NDrRlPQpCNtw/heZLtfUDqxBM1udqikb/Hbk52LK4nQSwr10u77iopCW5LsyHpuXS0GnEc48mLeew=="
     },
+    "string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "requires": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
+    "strip-ansi": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+      "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+      "dev": true,
+      "requires": {
+        "ansi-regex": "^2.0.0"
+      }
+    },
+    "superagent": {
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/superagent/-/superagent-3.8.3.tgz",
+      "integrity": "sha512-GLQtLMCoEIK4eDv6OGtkOoSMt3D+oq0y3dsxMuYuDvaNUvuT8eFBuLmfR0iYYzHC1e8hpzC6ZsxbuP6DIalMFA==",
+      "requires": {
+        "component-emitter": "^1.2.0",
+        "cookiejar": "^2.1.0",
+        "debug": "^3.1.0",
+        "extend": "^3.0.0",
+        "form-data": "^2.3.1",
+        "formidable": "^1.2.0",
+        "methods": "^1.1.1",
+        "mime": "^1.4.1",
+        "qs": "^6.5.1",
+        "readable-stream": "^2.3.5"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "3.2.6",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
+          "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "ms": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
+          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg=="
+        }
+      }
+    },
+    "supertest": {
+      "version": "3.4.2",
+      "resolved": "https://registry.npmjs.org/supertest/-/supertest-3.4.2.tgz",
+      "integrity": "sha512-WZWbwceHUo2P36RoEIdXvmqfs47idNNZjCuJOqDz6rvtkk8ym56aU5oglORCpPeXGxT7l9rkJ41+O1lffQXYSA==",
+      "requires": {
+        "methods": "^1.1.2",
+        "superagent": "^3.8.3"
+      }
+    },
+    "supports-color": {
+      "version": "5.4.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.4.0.tgz",
+      "integrity": "sha512-zjaXglF5nnWpsq470jSv6P9DwPvgLkuapYmfDm3JWOm0vkNTVF2tI4UrN2r6jH1qM/uc/WtxYY1hYoA2dOKj5w==",
+      "dev": true,
+      "requires": {
+        "has-flag": "^3.0.0"
+      }
+    },
     "ts-node": {
       "version": "6.1.1",
       "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-6.1.1.tgz",
@@ -566,6 +1262,17 @@
         "yn": "^2.0.0"
       }
     },
+    "tslib": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
+      "integrity": "sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ=="
+    },
+    "type-detect": {
+      "version": "4.0.8",
+      "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.0.8.tgz",
+      "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==",
+      "dev": true
+    },
     "type-is": {
       "version": "1.6.16",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.16.tgz",
@@ -586,6 +1293,11 @@
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
       "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
     },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+    },
     "utils-merge": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
@@ -596,6 +1308,12 @@
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
       "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
     },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "dev": true
+    },
     "yn": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/yn/-/yn-2.0.0.tgz",
diff --git a/package.json b/package.json
index 03aed96..b301b35 100644
--- a/package.json
+++ b/package.json
@@ -9,24 +9,46 @@
   },
   "scripts": {
     "start": "ts-node service/server/index.ts",
-    "prettier:check": "prettier --check service/**/*.{ts,tsx,js,jsx}",
-    "prettier:write": "prettier --write service/**/*.{ts,tsx,js,jsx}"
+    "prettier:check": "prettier --check service/**/*.{ts,tsx,jsx}",
+    "prettier:write": "prettier --write service/**/*.{ts,tsx,jsx}",
+    "test": "npm run prettier:check && npm run test:unit && npm audit",
+    "test:unit": "_mocha 'service/**/*Spec.ts' --opts service/mocha.opts",
+    "test:integration": "_mocha 'test/integration/**/*Test.ts' --opts service/mocha.opts"
   },
   "dependencies": {
     "express": "^4.16.2",
-    "compression": "1.7.2",
-    "cookie-parser": "1.4.3",
-    "http-status-codes": "1.3.0",
+    "compression": "^1.7.2",
+    "cookie-parser": "^1.4.3",
+    "http-status-codes": "^1.3.0",
     "connect-datadog": "^0.0.6",
-    "hot-shots": "^4.7.0"
+    "hot-shots": "^4.7.0",
+    "supertest": "^3.0.0",
+    "tslib": "^1.9.3"
   },
   "devDependencies": {
-    "@types/express": "4.11.1",
+    "@types/chai": "4.1.7",
+    "@types/chai-as-promised": "7.1.0",
+    "@types/chai-string": "1.4.1",
+    "@types/chai-subset": "1.3.1",
     "@types/compression": "0.0.35",
     "@types/cookie-parser": "1.4.1",
-    "typescript": "3.1.1",
+    "@types/express": "4.11.1",
+    "@types/supertest": "2.0.4",
+    "@types/mocha": "5.2.5",
+    "@types/sinon-chai": "3.2.2",
+    "chai": "4.2.0",
+    "chai-as-promised": "7.1.1",
+    "chai-shallow-deep-equal": "1.4.6",
+    "chai-string": "1.5.0",
+    "chai-subset": "1.6.0",
+    "expressmocks": "^0.1.3",
+    "mocha": "5.2.0",
+    "mocha-better-spec-reporter": "3.1.0",
+    "prettier": "^1.9.2",
+    "sinon": "7.2.2",
+    "sinon-chai": "3.3.0",
     "ts-node": "6.1.1",
-    "prettier": "^1.9.2"
+    "typescript": "3.1.1"
   },
   "author": "Jonas Verhoelen <jonas.verhoelen@codecentric.de>",
   "repository": {
diff --git a/service/mocha.opts b/service/mocha.opts
new file mode 100644
index 0000000..4a43b86
--- /dev/null
+++ b/service/mocha.opts
@@ -0,0 +1,7 @@
+--require ts-node/register
+--reporter mocha-better-spec-reporter
+--recursive
+--require service/setupTestEnvironment.ts
+--inspect
+--debug-brk
+--timeout 5000
diff --git a/service/server/ExpressServer.ts b/service/server/ExpressServer.ts
index 275ab02..121c01d 100644
--- a/service/server/ExpressServer.ts
+++ b/service/server/ExpressServer.ts
@@ -63,7 +63,7 @@ export class ExpressServer {
 
     private configureApiEndpoints(server: Express) {
         server.get('/api/cat', noCache, this.catEndpoints.getAllCats)
-        server.get('/api/statistics/cat', noCache, this.catEndpoints.getCatStatistics)
+        server.get('/api/statistics/cat', noCache, this.catEndpoints.getCatsStatistics)
         server.get('/api/cat/:catId', noCache, this.catEndpoints.getCatDetails)
     }
 }
diff --git a/service/server/cats/CatEndpoints.ts b/service/server/cats/CatEndpoints.ts
index f49e0bd..906a546 100644
--- a/service/server/cats/CatEndpoints.ts
+++ b/service/server/cats/CatEndpoints.ts
@@ -27,7 +27,7 @@ export class CatEndpoints {
         }
     }
 
-    public getCatStatistics = async (req: Request, res: Response, next: NextFunction) => {
+    public getCatsStatistics = async (req: Request, res: Response, next: NextFunction) => {
         try {
             res.json(req.services.catService.getCatsStatistics())
         } catch (err) {
diff --git a/service/server/cats/CatEndpointsSpec.ts b/service/server/cats/CatEndpointsSpec.ts
new file mode 100644
index 0000000..2e12866
--- /dev/null
+++ b/service/server/cats/CatEndpointsSpec.ts
@@ -0,0 +1,93 @@
+import * as sinon from 'sinon'
+import { expect } from 'chai'
+import * as HttpStatus from 'http-status-codes'
+import ExpressMocks, { Mocks } from 'expressmocks'
+import { CatEndpoints } from './CatEndpoints'
+import { exampleCats } from './exampleCats'
+
+describe('CatEndpoints', () => {
+    const sandbox = sinon.createSandbox()
+    let sampleRequest: any
+    let catService: any
+    let endpoints: CatEndpoints
+
+    beforeEach(() => {
+        endpoints = new CatEndpoints()
+        catService = {
+            getCat: sandbox.stub(),
+            getAllCats: sandbox.stub().returns(exampleCats),
+            getCatsStatistics: sandbox.stub().returns({ amount: 30, averageAge: 50 })
+        }
+        sampleRequest = {
+            services: { catService },
+            params: { catId: 1 }
+        }
+    })
+
+    describe('getCatDetails', () => {
+        it('should ask the underlying service for the cat', () => {
+            return ExpressMocks.create(sampleRequest)
+                .test(endpoints.getCatDetails)
+                .then(() => expect(catService.getCat).to.have.been.calledWith(1))
+        })
+
+        it('should return the cat as JSON response if it could be found by the service', () => {
+            catService.getCat.withArgs(1).returns({ id: 1, name: 'Sample Cat' })
+
+            return ExpressMocks.create(sampleRequest)
+                .test(endpoints.getCatDetails)
+                .expectJson({ id: 1, name: 'Sample Cat' })
+        })
+
+        it('should send only the 404 status if the cat could not be found', () => {
+            catService.getCat.withArgs(1).returns(undefined)
+
+            return ExpressMocks.create(sampleRequest)
+                .test(endpoints.getCatDetails)
+                .expectSendStatus(HttpStatus.NOT_FOUND)
+        })
+
+        it('should handle thrown errors by passing them to NextFunction', () => {
+            const thrownError = new Error('Some problem with accessing the data')
+            catService.getCat.throws(thrownError)
+
+            return ExpressMocks.create(sampleRequest)
+                .test(endpoints.getCatDetails)
+                .expectNext(thrownError)
+        })
+    })
+
+    describe('getAllCats', () => {
+        it('should return all cats as JSON response', () => {
+            return ExpressMocks.create(sampleRequest)
+                .test(endpoints.getAllCats)
+                .expectJson(exampleCats)
+        })
+
+        it('should handle thrown errors by passing them to NextFunction', () => {
+            const thrownError = new Error('Some problem with accessing the data')
+            catService.getAllCats.throws(thrownError)
+
+            return ExpressMocks.create(sampleRequest)
+                .test(endpoints.getAllCats)
+                .expectNext(thrownError)
+        })
+    })
+
+    describe('getCatsStatistics', () => {
+        it('should return the statistics as JSON response', () => {
+            return ExpressMocks.create(sampleRequest)
+                .test(endpoints.getCatsStatistics)
+                .expectJson({ amount: 30, averageAge: 50 })
+        })
+
+        it('should handle thrown errors by passing them to NextFunction', () => {
+            const thrownError = new Error('Some problem with accessing the data')
+            catService.getCatsStatistics.throws(thrownError)
+
+            return ExpressMocks.create(sampleRequest)
+                .test(endpoints.getCatsStatistics)
+                .expectNext(thrownError)
+        })
+    })
+})
diff --git a/service/server/cats/CatRepository.ts b/service/server/cats/CatRepository.ts
index 39f3998..0b12e88 100644
--- a/service/server/cats/CatRepository.ts
+++ b/service/server/cats/CatRepository.ts
@@ -1,4 +1,5 @@
 import { Cat } from './Cat'
+import { catsById, exampleCats } from './exampleCats'
 
 export class CatRepository {
     public getById(id: number): Cat | undefined {
@@ -6,49 +7,6 @@ export class CatRepository {
     }
 
     public getAll(): Cat[] {
-        return cats
+        return exampleCats
     }
 }
-
-const cats: Cat[] = [
-    {
-        id: 1,
-        name: 'Tony Iommi',
-        breed: 'British Shorthair',
-        gender: 'male',
-        age: 71
-    },
-    {
-        id: 2,
-        name: 'Ozzy Osbourne',
-        breed: 'British Semi-longhair',
-        gender: 'male',
-        age: 70
-    },
-    {
-        id: 3,
-        name: 'Geezer Butler',
-        breed: 'British Longhair',
-        gender: 'male',
-        age: 69
-    },
-    {
-        id: 4,
-        name: 'Bill Ward',
-        breed: 'Burmilla',
-        gender: 'male',
-        age: 70
-    },
-    {
-        id: 5,
-        name: 'Sharon Osbourne',
-        breed: 'Bambino',
-        gender: 'female',
-        age: 66
-    }
-]
-type CatsById = { [id: number]: Cat }
-const catsById: CatsById = cats.reduce((catzById: CatsById, currentCat) => {
-    catzById[currentCat.id] = currentCat
-    return catzById
-}, {})
diff --git a/service/server/cats/CatRepositorySpec.ts b/service/server/cats/CatRepositorySpec.ts
new file mode 100644
index 0000000..4297993
--- /dev/null
+++ b/service/server/cats/CatRepositorySpec.ts
@@ -0,0 +1,30 @@
+import { expect } from 'chai'
+import { CatRepository } from './CatRepository'
+import { exampleCats } from './exampleCats'
+
+describe('CatRepository', () => {
+    const repository = new CatRepository()
+
+    describe('getById', () => {
+        it('should find an existing cat in the storage by ID', () => {
+            const cat = repository.getById(1)
+            expect(cat).to.deep.equal({
+                id: 1,
+                name: 'Tony Iommi',
+                breed: 'British Shorthair',
+                gender: 'male',
+                age: 71
+            })
+        })
+
+        it('should return undefined if a cat is not in storage', () => {
+            expect(repository.getById(999)).to.be.undefined
+        })
+    })
+
+    describe('getAll', () => {
+        it('should find all cats', () => {
+            expect(repository.getAll()).to.deep.equal(exampleCats)
+        })
+    })
+})
diff --git a/service/server/cats/CatService.ts b/service/server/cats/CatService.ts
index 701bc2d..f8ebd26 100644
--- a/service/server/cats/CatService.ts
+++ b/service/server/cats/CatService.ts
@@ -19,7 +19,7 @@ export class CatService {
 
         return {
             amount: allCats.length,
-            averageAge: catsAgeSum / allCats.length
+            averageAge: allCats.length ? catsAgeSum / allCats.length : 0
         }
     }
 }
\ No newline at end of file
diff --git a/service/server/cats/CatServiceSpec.ts b/service/server/cats/CatServiceSpec.ts
new file mode 100644
index 0000000..6e09629
--- /dev/null
+++ b/service/server/cats/CatServiceSpec.ts
@@ -0,0 +1,33 @@
+import * as sinon from 'sinon'
+import { expect } from 'chai'
+import { CatService } from './CatService'
+import { exampleCats } from './exampleCats'
+
+describe('CatService', () => {
+    const sandbox = sinon.createSandbox()
+    let catService: CatService
+    let catRepository: any
+    
+    beforeEach(() => {
+        catRepository = { getAll: sandbox.stub().returns(exampleCats) }
+        catService = new CatService(catRepository)
+    })
+
+    describe('getCatsStatistics', () => {
+        it('should reflect the total amount of cats', () => {
+            expect(catService.getCatsStatistics().amount).to.eq(5)
+        })
+
+        it('should calculate the average age of all cats', () => {
+            expect(catService.getCatsStatistics().averageAge).to.eq(69.2)
+        })
+
+        it('should calculate an average age of zero if the amount of cats is zero', () => {
+            catRepository.getAll.returns([])
+            expect(catService.getCatsStatistics()).to.deep.equal({
+                amount: 0,
+                averageAge: 0
+            })
+        })
+    })
+})
\ No newline at end of file
diff --git a/service/server/cats/exampleCats.ts b/service/server/cats/exampleCats.ts
new file mode 100644
index 0000000..9d9def6
--- /dev/null
+++ b/service/server/cats/exampleCats.ts
@@ -0,0 +1,44 @@
+import { Cat } from './Cat'
+
+export const exampleCats: Cat[] = [
+    {
+        id: 1,
+        name: 'Tony Iommi',
+        breed: 'British Shorthair',
+        gender: 'male',
+        age: 71
+    },
+    {
+        id: 2,
+        name: 'Ozzy Osbourne',
+        breed: 'British Semi-longhair',
+        gender: 'male',
+        age: 70
+    },
+    {
+        id: 3,
+        name: 'Geezer Butler',
+        breed: 'British Longhair',
+        gender: 'male',
+        age: 69
+    },
+    {
+        id: 4,
+        name: 'Bill Ward',
+        breed: 'Burmilla',
+        gender: 'male',
+        age: 70
+    },
+    {
+        id: 5,
+        name: 'Sharon Osbourne',
+        breed: 'Bambino',
+        gender: 'female',
+        age: 66
+    }
+]
+type CatsById = { [id: number]: Cat }
+export const catsById: CatsById = exampleCats.reduce((catzById: CatsById, currentCat) => {
+    catzById[currentCat.id] = currentCat
+    return catzById
+}, {})
diff --git a/service/server/middlewares/NoCacheMiddlewareSpec.ts b/service/server/middlewares/NoCacheMiddlewareSpec.ts
new file mode 100644
index 0000000..6c5e718
--- /dev/null
+++ b/service/server/middlewares/NoCacheMiddlewareSpec.ts
@@ -0,0 +1,36 @@
+import { expect } from 'chai'
+import * as sinon from 'sinon'
+import { noCache } from './NoCacheMiddleware'
+
+describe('NoCacheMiddleware', () => {
+    const sandbox = sinon.createSandbox()
+    let next: sinon.SinonSpy
+    let requestMock: any
+    let responseMock: any
+
+    describe('noCache', () => {
+        beforeEach(() => {
+            requestMock = {}
+            responseMock = {
+                setHeader: sandbox.spy()
+            }
+            next = sandbox.spy()
+        })
+
+        it('should call "next"', () => {
+            noCache(requestMock, responseMock, next)
+            expect(next).to.have.been.calledOnce
+        })
+
+        it('should set all required headers', () => {
+            noCache(requestMock, responseMock, next)
+            expect(responseMock.setHeader).to.have.been.calledThrice
+
+            sinon.assert.callOrder(
+                responseMock.setHeader.withArgs('Expires', '0'),
+                responseMock.setHeader.withArgs('Pragma', 'no-cache'),
+                responseMock.setHeader.withArgs('Cache-Control', 'no-cache, no-store, must-revalidate')
+            )
+        })
+    })
+})
diff --git a/service/server/middlewares/ServiceDependenciesMiddlewareSpec.ts b/service/server/middlewares/ServiceDependenciesMiddlewareSpec.ts
new file mode 100644
index 0000000..7a863f6
--- /dev/null
+++ b/service/server/middlewares/ServiceDependenciesMiddlewareSpec.ts
@@ -0,0 +1,30 @@
+import { expect } from 'chai'
+import { RequestHandler } from 'express'
+import { addServicesToRequest } from './ServiceDependenciesMiddleware'
+
+describe('addServicesToRequest', () => {
+    const services: any = { myService: 'something' }
+    let middleware: RequestHandler
+    let requestMock: any
+    let responseMock: any
+
+    beforeEach(() => {
+        requestMock = {}
+        responseMock = {}
+        middleware = addServicesToRequest(services)
+    })
+
+    it('should set "services" on request', done => {
+        middleware(requestMock, responseMock, () => {
+            expect(requestMock.services).to.deep.equal(services)
+            done()
+        })
+    })
+
+    it('should call next()', done => {
+        middleware(requestMock, responseMock, error => {
+            expect(error).to.be.undefined
+            done()
+        })
+    })
+})
diff --git a/service/setupTestEnvironment.ts b/service/setupTestEnvironment.ts
new file mode 100644
index 0000000..903270a
--- /dev/null
+++ b/service/setupTestEnvironment.ts
@@ -0,0 +1,14 @@
+import chai = require('chai')
+import chaiString = require('chai-string')
+import chaiSubset = require('chai-subset')
+import sinon = require('sinon')
+import sinonChai = require('sinon-chai')
+import chaiAsPromised = require('chai-as-promised')
+import chaiShallowDeepEqual = require('chai-shallow-deep-equal')
+
+chai.should()
+chai.use(chaiString)
+chai.use(chaiSubset)
+chai.use(sinonChai)
+chai.use(chaiAsPromised)
+chai.use(chaiShallowDeepEqual)
diff --git a/test/integration/CatsApiTest.ts b/test/integration/CatsApiTest.ts
new file mode 100644
index 0000000..9fa7f29
--- /dev/null
+++ b/test/integration/CatsApiTest.ts
@@ -0,0 +1,71 @@
+import * as request from 'supertest'
+import { expect } from 'chai'
+import * as HttpStatus from 'http-status-codes'
+import TestEnv from './TestEnv'
+
+const { baseUrl } = TestEnv
+
+describe('Cats API', () => {
+    describe('Cat details', () => {
+        it('should respond with a positive status code if the cat is known', () => {
+            return request(baseUrl)
+                .get('/api/cat/1')
+                .expect(HttpStatus.OK)
+        })
+
+        it('should respond with 404 status code if the cat is not known', () => {
+            return request(baseUrl)
+                .get('/api/cat/666')
+                .expect(HttpStatus.NOT_FOUND)
+        })
+
+        it('should respond with cat details data if the cat is known', () => {
+            return request(baseUrl)
+                .get('/api/cat/1')
+                .expect((res: Response) => {
+                    expect(res.body).to.deep.equal({
+                        id: 1,
+                        name: 'Tony Iommi',
+                        breed: 'British Shorthair',
+                        gender: 'male',
+                        age: 71
+                    })
+                })
+        })
+    })
+
+    describe('All cats', () => {
+        it('should respond with a positive status code', () => {
+            return request(baseUrl)
+                .get('/api/cat')
+                .expect(HttpStatus.OK)
+        })
+
+        it('should return a reasonable amount of cats entries', () => {
+            return request(baseUrl)
+                .get('/api/cat')
+                .expect((res: Response) => {
+                    expect((res.body as any).length).to.eq(5)
+                })
+        })
+    })
+
+    describe('Cat statistics', () => {
+        it('should respond with a positive status code', () => {
+            return request(baseUrl)
+                .get('/api/statistics/cat')
+                .expect(HttpStatus.OK)
+        })
+
+        it('should deliver a reasonable statistics response', () => {
+            return request(baseUrl)
+                .get('/api/statistics/cat')
+                .expect((res: Response) => {
+                    expect(res.body).to.deep.eq({
+                        amount: 5,
+                        averageAge: 69.2
+                    })
+                })
+        })
+    })
+})
diff --git a/test/integration/TestEnv.ts b/test/integration/TestEnv.ts
new file mode 100644
index 0000000..7245d18
--- /dev/null
+++ b/test/integration/TestEnv.ts
@@ -0,0 +1,4 @@
+export default class TestEnv {
+    public static readonly local = !process.env.BASE_URL
+    public static readonly baseUrl = process.env.BASE_URL || 'http://localhost:8000'
+}