diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..8d17f24
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,13 @@
+version: 2
+jobs:
+  build:
+    docker:
+      - image: node:10
+    steps:
+      - checkout
+      - run:
+          name: dep install
+          command: npm install
+      - run:
+          name: test
+          command: npm test
diff --git a/README.md b/README.md
index 9415967..00e6cdf 100644
--- a/README.md
+++ b/README.md
@@ -30,9 +30,9 @@ The create-react-app of embeddable widgets.
 ## Roadmap
 
 - [x] Widget as react app - index.html works (webpack, babel, react)
-- [ ] React widget (widget builder)
-- [ ] Webpack changed to output a library
-- [ ] Add tests
+- [x] React widget (widget builder)
+- [x] Webpack changed to output a library
+- [x] Add tests
 - [ ] Add greenkeeper
 - [ ] Integrate eslint with webpack
 - [ ] Theming support
diff --git a/jest/cssTransform.js b/jest/cssTransform.js
new file mode 100644
index 0000000..24f3811
--- /dev/null
+++ b/jest/cssTransform.js
@@ -0,0 +1,8 @@
+module.exports = {
+  process() {
+    return 'module.exports = {};'
+  },
+  getCacheKey() {
+    return 'cssTransform'
+  },
+}
diff --git a/jest/fileTransform.js b/jest/fileTransform.js
new file mode 100644
index 0000000..98f79ba
--- /dev/null
+++ b/jest/fileTransform.js
@@ -0,0 +1,7 @@
+const path = require('path')
+
+module.exports = {
+  process(src, filename) {
+    return `module.exports = ${JSON.stringify(path.basename(filename))};`
+  },
+}
\ No newline at end of file
diff --git a/jest/setup.js b/jest/setup.js
new file mode 100644
index 0000000..acd71d4
--- /dev/null
+++ b/jest/setup.js
@@ -0,0 +1,4 @@
+import Enzyme from 'enzyme';
+import Adapter from 'enzyme-adapter-react-16';
+
+Enzyme.configure({ adapter: new Adapter() });
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 4c92ab8..f296e3d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -211,6 +211,12 @@
       "integrity": "sha512-ONhaKPIufzzrlNbqtWFFd+jlnemX6lJAgq9ZeiZtS7I1PIf/la7CW4m83rTXRnVnsMbW2k56pGYu7AUFJD9Pow==",
       "dev": true
     },
+    "@types/node": {
+      "version": "10.1.3",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.1.3.tgz",
+      "integrity": "sha512-GiCx7dRvta0hbxXoJFAUxz+CKX6bZSCKjM5slq2vPp/5zwK01T4ibYZkGr6EN4F2QmxDQR76/ZHg6q+7iFWCWw==",
+      "dev": true
+    },
     "@webassemblyjs/ast": {
       "version": "1.4.3",
       "resolved": "https://registry.npmjs.org/@webassemblyjs/ast/-/ast-1.4.3.tgz",
@@ -397,6 +403,12 @@
         "webpack-log": "1.2.0"
       }
     },
+    "abab": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/abab/-/abab-1.0.4.tgz",
+      "integrity": "sha1-X6rZwsB/YN12dw9xzwJbYqY8/U4=",
+      "dev": true
+    },
     "abbrev": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
@@ -428,6 +440,15 @@
         "acorn": "5.5.3"
       }
     },
+    "acorn-globals": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-4.1.0.tgz",
+      "integrity": "sha512-KjZwU26uG3u6eZcfGbTULzFcsoz6pegNKtHPksZPOUsiKo5bUmiBPa38FuHZ/Eun+XYh/JCCkS9AS3Lu4McQOQ==",
+      "dev": true,
+      "requires": {
+        "acorn": "5.5.3"
+      }
+    },
     "acorn-jsx": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-3.0.1.tgz",
@@ -463,6 +484,28 @@
       "integrity": "sha1-6GuBnGAs+IIa1jdBNpjx3sAhhHo=",
       "dev": true
     },
+    "align-text": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
+      "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
+      "dev": true,
+      "requires": {
+        "kind-of": "3.2.2",
+        "longest": "1.0.1",
+        "repeat-string": "1.6.1"
+      },
+      "dependencies": {
+        "kind-of": {
+          "version": "3.2.2",
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
+          "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+          "dev": true,
+          "requires": {
+            "is-buffer": "1.1.6"
+          }
+        }
+      }
+    },
     "alphanum-sort": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/alphanum-sort/-/alphanum-sort-1.0.2.tgz",
@@ -533,6 +576,15 @@
       "integrity": "sha1-zWLc+OT9WkF+/GZNLlsQZTxlG0Y=",
       "dev": true
     },
+    "append-transform": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/append-transform/-/append-transform-0.4.0.tgz",
+      "integrity": "sha1-126/jKlNJ24keja61EpLdKthGZE=",
+      "dev": true,
+      "requires": {
+        "default-require-extensions": "1.0.0"
+      }
+    },
     "aproba": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/aproba/-/aproba-1.2.0.tgz",
@@ -598,6 +650,12 @@
       "integrity": "sha1-7/UuN1gknTO+QCuLuOVkuytdQDE=",
       "dev": true
     },
+    "array-equal": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/array-equal/-/array-equal-1.0.0.tgz",
+      "integrity": "sha1-jCpe8kcv2ep0KwTHenUJO6J1fJM=",
+      "dev": true
+    },
     "array-find": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/array-find/-/array-find-1.0.0.tgz",
@@ -702,6 +760,12 @@
       "integrity": "sha1-9wtzXGvKGlycItmCw+Oef+ujva0=",
       "dev": true
     },
+    "astral-regex": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-1.0.0.tgz",
+      "integrity": "sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg==",
+      "dev": true
+    },
     "async": {
       "version": "1.5.2",
       "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
@@ -1099,6 +1163,16 @@
         "babel-template": "6.26.0"
       }
     },
+    "babel-jest": {
+      "version": "23.0.1",
+      "resolved": "https://registry.npmjs.org/babel-jest/-/babel-jest-23.0.1.tgz",
+      "integrity": "sha1-u6079SP7IC2gXtCmVAtIyE7tE6Y=",
+      "dev": true,
+      "requires": {
+        "babel-plugin-istanbul": "4.1.6",
+        "babel-preset-jest": "23.0.1"
+      }
+    },
     "babel-loader": {
       "version": "7.1.4",
       "resolved": "https://registry.npmjs.org/babel-loader/-/babel-loader-7.1.4.tgz",
@@ -1128,6 +1202,24 @@
         "babel-runtime": "6.26.0"
       }
     },
+    "babel-plugin-istanbul": {
+      "version": "4.1.6",
+      "resolved": "https://registry.npmjs.org/babel-plugin-istanbul/-/babel-plugin-istanbul-4.1.6.tgz",
+      "integrity": "sha512-PWP9FQ1AhZhS01T/4qLSKoHGY/xvkZdVBGlKM/HuxxS3+sC66HhTNR7+MpbO/so/cz/wY94MeSWJuP1hXIPfwQ==",
+      "dev": true,
+      "requires": {
+        "babel-plugin-syntax-object-rest-spread": "6.13.0",
+        "find-up": "2.1.0",
+        "istanbul-lib-instrument": "1.10.1",
+        "test-exclude": "4.2.1"
+      }
+    },
+    "babel-plugin-jest-hoist": {
+      "version": "23.0.1",
+      "resolved": "https://registry.npmjs.org/babel-plugin-jest-hoist/-/babel-plugin-jest-hoist-23.0.1.tgz",
+      "integrity": "sha1-6qEclkVjrqnCG+zvK994U/fzwUg=",
+      "dev": true
+    },
     "babel-plugin-syntax-async-functions": {
       "version": "6.13.0",
       "resolved": "https://registry.npmjs.org/babel-plugin-syntax-async-functions/-/babel-plugin-syntax-async-functions-6.13.0.tgz",
@@ -1492,6 +1584,24 @@
         "regexpu-core": "2.0.0"
       }
     },
+    "babel-plugin-transform-es3-member-expression-literals": {
+      "version": "6.22.0",
+      "resolved": "https://registry.npmjs.org/babel-plugin-transform-es3-member-expression-literals/-/babel-plugin-transform-es3-member-expression-literals-6.22.0.tgz",
+      "integrity": "sha1-cz00RPPsxBvvjtGmpOCWV7iWnrs=",
+      "dev": true,
+      "requires": {
+        "babel-runtime": "6.26.0"
+      }
+    },
+    "babel-plugin-transform-es3-property-literals": {
+      "version": "6.22.0",
+      "resolved": "https://registry.npmjs.org/babel-plugin-transform-es3-property-literals/-/babel-plugin-transform-es3-property-literals-6.22.0.tgz",
+      "integrity": "sha1-sgeNWELiKr9A9z6M3pzTcRq9V1g=",
+      "dev": true,
+      "requires": {
+        "babel-runtime": "6.26.0"
+      }
+    },
     "babel-plugin-transform-exponentiation-operator": {
       "version": "6.24.1",
       "resolved": "https://registry.npmjs.org/babel-plugin-transform-exponentiation-operator/-/babel-plugin-transform-exponentiation-operator-6.24.1.tgz",
@@ -1523,6 +1633,15 @@
         "babel-runtime": "6.26.0"
       }
     },
+    "babel-plugin-transform-jscript": {
+      "version": "6.22.0",
+      "resolved": "https://registry.npmjs.org/babel-plugin-transform-jscript/-/babel-plugin-transform-jscript-6.22.0.tgz",
+      "integrity": "sha1-borxK3q6SeCoCRUmFqwFaQszUtw=",
+      "dev": true,
+      "requires": {
+        "babel-runtime": "6.26.0"
+      }
+    },
     "babel-plugin-transform-object-rest-spread": {
       "version": "6.26.0",
       "resolved": "https://registry.npmjs.org/babel-plugin-transform-object-rest-spread/-/babel-plugin-transform-object-rest-spread-6.26.0.tgz",
@@ -1592,6 +1711,25 @@
         "babel-types": "6.26.0"
       }
     },
+    "babel-preset-airbnb": {
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/babel-preset-airbnb/-/babel-preset-airbnb-2.4.0.tgz",
+      "integrity": "sha512-Lum0Wf6y8qP4GdToXznf7PV7ecuOckl2Yv0Ww6latW88YIEexip7mFFsJVortjBtqhYpJoOzKG3xOeLllGu68Q==",
+      "dev": true,
+      "requires": {
+        "babel-plugin-syntax-trailing-function-commas": "6.22.0",
+        "babel-plugin-transform-es2015-modules-commonjs": "6.26.2",
+        "babel-plugin-transform-es2015-template-literals": "6.22.0",
+        "babel-plugin-transform-es3-member-expression-literals": "6.22.0",
+        "babel-plugin-transform-es3-property-literals": "6.22.0",
+        "babel-plugin-transform-exponentiation-operator": "6.24.1",
+        "babel-plugin-transform-jscript": "6.22.0",
+        "babel-plugin-transform-object-rest-spread": "6.26.0",
+        "babel-preset-env": "1.7.0",
+        "babel-preset-react": "6.24.1",
+        "object.assign": "4.1.0"
+      }
+    },
     "babel-preset-env": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/babel-preset-env/-/babel-preset-env-1.7.0.tgz",
@@ -1671,6 +1809,16 @@
         "babel-plugin-transform-flow-strip-types": "6.22.0"
       }
     },
+    "babel-preset-jest": {
+      "version": "23.0.1",
+      "resolved": "https://registry.npmjs.org/babel-preset-jest/-/babel-preset-jest-23.0.1.tgz",
+      "integrity": "sha1-YxzFRcbPAhlDATvK8i9F2H/mIZg=",
+      "dev": true,
+      "requires": {
+        "babel-plugin-jest-hoist": "23.0.1",
+        "babel-plugin-syntax-object-rest-spread": "6.13.0"
+      }
+    },
     "babel-preset-react": {
       "version": "6.24.1",
       "resolved": "https://registry.npmjs.org/babel-preset-react/-/babel-preset-react-6.24.1.tgz",
@@ -1935,6 +2083,12 @@
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       "dev": true
     },
+    "boolbase": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
+      "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24=",
+      "dev": true
+    },
     "boom": {
       "version": "2.10.1",
       "resolved": "https://registry.npmjs.org/boom/-/boom-2.10.1.tgz",
@@ -2004,6 +2158,29 @@
       "integrity": "sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8=",
       "dev": true
     },
+    "browser-process-hrtime": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/browser-process-hrtime/-/browser-process-hrtime-0.1.2.tgz",
+      "integrity": "sha1-Ql1opY00R/AqBKqJQYf86K+Le44=",
+      "dev": true
+    },
+    "browser-resolve": {
+      "version": "1.11.2",
+      "resolved": "https://registry.npmjs.org/browser-resolve/-/browser-resolve-1.11.2.tgz",
+      "integrity": "sha1-j/CbCixCFxihBRwmCzLkj0QpOM4=",
+      "dev": true,
+      "requires": {
+        "resolve": "1.1.7"
+      },
+      "dependencies": {
+        "resolve": {
+          "version": "1.1.7",
+          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
+          "integrity": "sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=",
+          "dev": true
+        }
+      }
+    },
     "browserify-aes": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/browserify-aes/-/browserify-aes-1.2.0.tgz",
@@ -2084,6 +2261,15 @@
         "electron-to-chromium": "1.3.48"
       }
     },
+    "bser": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/bser/-/bser-2.0.0.tgz",
+      "integrity": "sha1-mseNPtXZFYBP2HrLFYvHlxR6Fxk=",
+      "dev": true,
+      "requires": {
+        "node-int64": "0.4.0"
+      }
+    },
     "buffer": {
       "version": "4.9.1",
       "resolved": "https://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz",
@@ -2254,6 +2440,15 @@
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       "dev": true
     },
+    "capture-exit": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/capture-exit/-/capture-exit-1.2.0.tgz",
+      "integrity": "sha1-HF/MSJ/QqwDU8ax64QcuMXP7q28=",
+      "dev": true,
+      "requires": {
+        "rsvp": "3.6.2"
+      }
+    },
     "capture-stack-trace": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/capture-stack-trace/-/capture-stack-trace-1.0.0.tgz",
@@ -2266,6 +2461,17 @@
       "integrity": "sha1-cVuW6phBWTzDMGeSP17GDr2k99c=",
       "dev": true
     },
+    "center-align": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/center-align/-/center-align-0.1.3.tgz",
+      "integrity": "sha1-qg0yYptu6XIgBBHL1EYckHvCt60=",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "align-text": "0.1.4",
+        "lazy-cache": "1.0.4"
+      }
+    },
     "chalk": {
       "version": "2.4.1",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.1.tgz",
@@ -2283,6 +2489,20 @@
       "integrity": "sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I=",
       "dev": true
     },
+    "cheerio": {
+      "version": "1.0.0-rc.2",
+      "resolved": "https://registry.npmjs.org/cheerio/-/cheerio-1.0.0-rc.2.tgz",
+      "integrity": "sha1-S59TqBsn5NXawxwP/Qz6A8xoMNs=",
+      "dev": true,
+      "requires": {
+        "css-select": "1.2.0",
+        "dom-serializer": "0.1.0",
+        "entities": "1.1.1",
+        "htmlparser2": "3.9.2",
+        "lodash": "4.17.10",
+        "parse5": "3.0.3"
+      }
+    },
     "chokidar": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-2.0.3.tgz",
@@ -2716,6 +2936,12 @@
       "integrity": "sha1-3dgA2gxmEnOTzKWVDqloo6rxJTs=",
       "dev": true
     },
+    "compare-versions": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/compare-versions/-/compare-versions-3.2.1.tgz",
+      "integrity": "sha512-2y2nHcopMG/NAyk6vWXlLs86XeM9sik4jmx1tKIgzMi9/RQ2eo758RGpxQO3ErihHmg0RlQITPqgz73y6s7quA==",
+      "dev": true
+    },
     "component-emitter": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.2.1.tgz",
@@ -2986,6 +3212,18 @@
         "source-list-map": "2.0.0"
       }
     },
+    "css-select": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/css-select/-/css-select-1.2.0.tgz",
+      "integrity": "sha1-KzoRBTnFNV8c2NMUYj6HCxIeyFg=",
+      "dev": true,
+      "requires": {
+        "boolbase": "1.0.0",
+        "css-what": "2.1.0",
+        "domutils": "1.5.1",
+        "nth-check": "1.0.1"
+      }
+    },
     "css-selector-tokenizer": {
       "version": "0.7.0",
       "resolved": "https://registry.npmjs.org/css-selector-tokenizer/-/css-selector-tokenizer-0.7.0.tgz",
@@ -3010,6 +3248,12 @@
         }
       }
     },
+    "css-what": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/css-what/-/css-what-2.1.0.tgz",
+      "integrity": "sha1-lGfQMsOM+u+58teVASUwYvh/ob0=",
+      "dev": true
+    },
     "cssesc": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/cssesc/-/cssesc-0.1.0.tgz",
@@ -3066,6 +3310,21 @@
         "source-map": "0.5.7"
       }
     },
+    "cssom": {
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.2.tgz",
+      "integrity": "sha1-uANhcMefB6kP8vFuIihAJ6JDhIs=",
+      "dev": true
+    },
+    "cssstyle": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/cssstyle/-/cssstyle-0.3.1.tgz",
+      "integrity": "sha512-tNvaxM5blOnxanyxI6panOsnfiyLRj3HV4qjqqS45WPNS1usdYWRUQjqTEEELK73lpeP/1KoIGYUwrBn/VcECA==",
+      "dev": true,
+      "requires": {
+        "cssom": "0.3.2"
+      }
+    },
     "currently-unhandled": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/currently-unhandled/-/currently-unhandled-0.4.1.tgz",
@@ -3119,6 +3378,17 @@
         }
       }
     },
+    "data-urls": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/data-urls/-/data-urls-1.0.0.tgz",
+      "integrity": "sha512-ai40PPQR0Fn1lD2PPie79CibnlMN2AYiDhwFX/rZHVsxbs5kNJSjegqXIprhouGXlRdEnfybva7kqRGnB6mypA==",
+      "dev": true,
+      "requires": {
+        "abab": "1.0.4",
+        "whatwg-mimetype": "2.1.0",
+        "whatwg-url": "6.4.1"
+      }
+    },
     "date-fns": {
       "version": "1.29.0",
       "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-1.29.0.tgz",
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       "dev": true
     },
+    "xml-name-validator": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
+      "integrity": "sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw==",
+      "dev": true
+    },
     "xtend": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
diff --git a/package.json b/package.json
index 24cda54..bbfa611 100644
--- a/package.json
+++ b/package.json
@@ -5,34 +5,46 @@
   "main": "index.js",
   "scripts": {
     "start": "webpack-serve --config ./webpack.config.js --mode development --open",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "jest"
   },
   "babel": {
     "presets": [
-      "env",
-      "react",
+      "airbnb",
       "stage-2"
     ]
   },
+  "jest": {
+    "transform": {
+      "^.+\\.(js|jsx|mjs)$": "<rootDir>/node_modules/babel-jest",
+      "^.+\\.(css|scss)$": "<rootDir>/jest/cssTransform.js",
+      "^(?!.*\\.(js|jsx|css|json)$)": "<rootDir>/jest/fileTransform.js"
+    },
+    "setupFiles": [
+      "<rootDir>/jest/setup.js"
+    ]
+  },
   "author": "seriousben https://github.com/seriousben",
   "license": "MIT",
   "devDependencies": {
     "babel-core": "^6.26.3",
     "babel-eslint": "^8.2.3",
+    "babel-jest": "^23.0.1",
     "babel-loader": "^7.1.4",
-    "babel-preset-env": "^1.7.0",
-    "babel-preset-react": "^6.24.1",
+    "babel-preset-airbnb": "^2.4.0",
     "babel-preset-stage-2": "^6.24.1",
     "css-loader": "^0.28.11",
+    "enzyme": "^3.3.0",
+    "enzyme-adapter-react-16": "^1.1.1",
     "eslint": "^4.19.1",
     "eslint-config-airbnb": "^16.1.0",
     "eslint-import-resolver-webpack": "^0.10.0",
     "eslint-plugin-import": "^2.12.0",
     "eslint-plugin-jsx-a11y": "^6.0.3",
     "eslint-plugin-react": "^7.8.2",
+    "jest": "^23.0.1",
+    "jest-cli": "^23.0.1",
     "mini-css-extract-plugin": "^0.4.0",
     "node-sass": "^4.9.0",
-    "react-transition-group": "^2.3.1",
     "sass-loader": "^7.0.1",
     "style-loader": "^0.21.0",
     "webpack": "^4.8.3",
@@ -42,6 +54,7 @@
   "dependencies": {
     "prop-types": "^15.6.1",
     "react": "^16.3.2",
-    "react-dom": "^16.3.2"
+    "react-dom": "^16.3.2",
+    "react-transition-group": "^2.3.1"
   }
 }
diff --git a/src/widget.js b/src/widget.js
index 56d8a2a..a02a411 100644
--- a/src/widget.js
+++ b/src/widget.js
@@ -43,7 +43,6 @@ class Widget extends Component {
     const body = this.renderBody();
 
     return (
-
       <div className="docked-widget">
         <Transition in={this.state.opened} timeout={250} onExited={this.handleWidgetExit}>
           {status => (
diff --git a/src/widget.test.js b/src/widget.test.js
new file mode 100644
index 0000000..a844a98
--- /dev/null
+++ b/src/widget.test.js
@@ -0,0 +1,9 @@
+import React from 'react';
+import { shallow } from 'enzyme';
+import Widget from './widget';
+
+test('simple test', () => {
+  const widgetDom = shallow(<Widget />);
+  console.log(widgetDom.html());
+  expect(widgetDom.find('.docked-widget').exists()).toBe(true);
+});