diff --git a/.eslintrc.yml b/.eslintrc.yml
index 4e3deb3..3778a71 100644
--- a/.eslintrc.yml
+++ b/.eslintrc.yml
@@ -1,6 +1,9 @@
 extends:
   - airbnb-base
 
+plugins:
+  - angular
+
 rules:
   import/no-extraneous-dependencies: off
   no-console: off
@@ -10,3 +13,8 @@ rules:
 
 globals:
   angular: true
+
+env:
+  node: true
+  jasmine: true
+  angular/mocks: true
diff --git a/karma.conf.js b/karma.conf.js
new file mode 100644
index 0000000..c1284a9
--- /dev/null
+++ b/karma.conf.js
@@ -0,0 +1,67 @@
+// Karma configuration
+
+module.exports = (config) => {
+  config.set({
+    // base path that will be used to resolve all patterns (eg. files, exclude)
+    basePath: '',
+
+    // frameworks to use
+    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
+    frameworks: ['jasmine'],
+
+    // list of files / patterns to load in the browser
+    files: [
+      'node_modules/angular/angular.js',
+      'node_modules/angular-mocks/angular-mocks.js',
+      'node_modules/@uirouter/angularjs/release/angular-ui-router.js',
+      'dist/ui-router-breadcrumbs.js',
+      'tests/**/*.spec.js',
+    ],
+
+    // list of files / patterns to exclude
+    exclude: [],
+
+    // preprocess matching files before serving them to the browser
+    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
+    preprocessors: {},
+
+    // test results reporter to use
+    // possible values: 'dots', 'progress'
+    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
+    reporters: ['progress'],
+
+    // web server port
+    port: 9876,
+
+    // enable / disable colors in the output (reporters and logs)
+    colors: true,
+
+    // level of logging
+    // possible values:
+    // config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
+    logLevel: config.LOG_INFO,
+
+    // enable / disable watching file and executing tests whenever any file changes
+    autoWatch: true,
+
+    // start these browsers
+    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
+    browsers: ['ChromeHeadless'],
+
+    // Continuous Integration mode
+    // if true, Karma captures browsers, runs the tests and exits
+    singleRun: false,
+
+    // Concurrency level
+    // how many browser should be started simultaneous
+    concurrency: Infinity,
+
+    // client options
+    client: {
+      // options for karma-jasmine
+      jasmine: {
+        random: false,
+      },
+    },
+  });
+};
diff --git a/package-lock.json b/package-lock.json
index 712b184..9ecabe8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -161,6 +161,12 @@
       "integrity": "sha512-5se7ZpcOtu0MBFlzGv5dsM1quQDoDeUTwZrWjGtTNA7O88cD8TEk5IEKCTDa3uECV9XnvKREVUr7du1ACiWGFQ==",
       "dev": true
     },
+    "angular-mocks": {
+      "version": "1.7.9",
+      "resolved": "https://registry.npmjs.org/angular-mocks/-/angular-mocks-1.7.9.tgz",
+      "integrity": "sha512-LQRqqiV3sZ7NTHBnNmLT0bXtE5e81t97+hkJ56oU0k3dqKv1s6F+nBWRlOVzqHWPGFOiPS8ZJVdrS8DFzHyNIA==",
+      "dev": true
+    },
     "ansi-escapes": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-4.3.0.tgz",
@@ -456,6 +462,12 @@
       "integrity": "sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig==",
       "dev": true
     },
+    "bluebird": {
+      "version": "3.7.2",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
+      "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==",
+      "dev": true
+    },
     "body": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/body/-/body-5.1.0.tgz",
@@ -468,6 +480,90 @@
         "safe-json-parse": "~1.0.1"
       }
     },
+    "body-parser": {
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
+      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
+      "dev": true,
+      "requires": {
+        "bytes": "3.1.0",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "on-finished": "~2.3.0",
+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
+      },
+      "dependencies": {
+        "bytes": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
+          "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==",
+          "dev": true
+        },
+        "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"
+          }
+        },
+        "http-errors": {
+          "version": "1.7.2",
+          "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.7.2.tgz",
+          "integrity": "sha512-uUQBt3H/cSIVfch6i1EuPNy/YsRSOUBXTVfZ+yR7Zjez3qjBz6i9+i4zjNaoqcoFVI4lQJ5plg63TvGfRSDCRg==",
+          "dev": true,
+          "requires": {
+            "depd": "~1.1.2",
+            "inherits": "2.0.3",
+            "setprototypeof": "1.1.1",
+            "statuses": ">= 1.5.0 < 2",
+            "toidentifier": "1.0.0"
+          }
+        },
+        "inherits": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
+          "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=",
+          "dev": true
+        },
+        "ms": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
+          "dev": true
+        },
+        "qs": {
+          "version": "6.7.0",
+          "resolved": "https://registry.npmjs.org/qs/-/qs-6.7.0.tgz",
+          "integrity": "sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ==",
+          "dev": true
+        },
+        "raw-body": {
+          "version": "2.4.0",
+          "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.4.0.tgz",
+          "integrity": "sha512-4Oz8DUIwdvoa5qMJelxipzi/iJIi40O5cGV1wNYp5hvZP8ZN0T+jiNkL0QepXs+EsQ9XJ8ipEDoiH70ySUJP3Q==",
+          "dev": true,
+          "requires": {
+            "bytes": "3.1.0",
+            "http-errors": "1.7.2",
+            "iconv-lite": "0.4.24",
+            "unpipe": "1.0.0"
+          }
+        },
+        "setprototypeof": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.1.tgz",
+          "integrity": "sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw==",
+          "dev": true
+        }
+      }
+    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -1478,6 +1574,28 @@
       "integrity": "sha1-YbU5PxH1JVntEgaTEANDtu2wTdU=",
       "dev": true
     },
+    "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
+    },
     "bytes": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-1.0.0.tgz",
@@ -1869,6 +1987,35 @@
       "integrity": "sha512-KbS1Y0jMtyPgIxjO7ZzMAuUpAKMt1SzCL9fsrKsX6b0zJPTaT0SiSPmewwVZg9UAO83HVIlEhZF84LIjZ0lmAw==",
       "dev": true
     },
+    "connect": {
+      "version": "3.7.0",
+      "resolved": "https://registry.npmjs.org/connect/-/connect-3.7.0.tgz",
+      "integrity": "sha512-ZqRXc+tZukToSNmh5C2iWMSoV3X1YUcPbqEM4DkEG5tNQXrQUZCNVGGv3IuicnkMtPfGf3Xtp8WCXs295iQ1pQ==",
+      "dev": true,
+      "requires": {
+        "debug": "2.6.9",
+        "finalhandler": "1.1.2",
+        "parseurl": "~1.3.3",
+        "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"
+          }
+        },
+        "ms": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
+          "dev": true
+        }
+      }
+    },
     "connect-history-api-fallback": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/connect-history-api-fallback/-/connect-history-api-fallback-1.6.0.tgz",
@@ -1881,6 +2028,12 @@
       "integrity": "sha1-/ozxhP9mcLa67wGp1IYaXL7EEgo=",
       "dev": true
     },
+    "content-type": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
+      "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA==",
+      "dev": true
+    },
     "continuable-cache": {
       "version": "0.3.1",
       "resolved": "https://registry.npmjs.org/continuable-cache/-/continuable-cache-0.3.1.tgz",
@@ -1975,6 +2128,18 @@
         "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
+    },
+    "date-format": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/date-format/-/date-format-2.1.0.tgz",
+      "integrity": "sha512-bYQuGLeFxhkxNOF3rcMtiZxvCBAquGzZm6oWA1oZ0g2THUzivaRhv8uOhdr19LmoobSOLoIAxeUK2RdbM8IFTA==",
+      "dev": true
+    },
     "dateformat": {
       "version": "1.0.12",
       "resolved": "https://registry.npmjs.org/dateformat/-/dateformat-1.0.12.tgz",
@@ -2080,6 +2245,12 @@
       "integrity": "sha1-p2o+0YVb56ASu4rBbLgPPADcKPA=",
       "dev": true
     },
+    "di": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/di/-/di-0.0.1.tgz",
+      "integrity": "sha1-gGZJMmzqp8qjMG112YXqJ0i6kTw=",
+      "dev": true
+    },
     "doctrine": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-3.0.0.tgz",
@@ -2089,6 +2260,18 @@
         "esutils": "^2.0.2"
       }
     },
+    "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"
+      }
+    },
     "duplexer": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/duplexer/-/duplexer-0.1.1.tgz",
@@ -2227,6 +2410,12 @@
         "has-binary2": "~1.0.2"
       }
     },
+    "ent": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/ent/-/ent-2.2.0.tgz",
+      "integrity": "sha1-6WQhkyWiHQX0RGai9obtbOX13R0=",
+      "dev": true
+    },
     "error": {
       "version": "7.2.1",
       "resolved": "https://registry.npmjs.org/error/-/error-7.2.1.tgz",
@@ -2449,6 +2638,12 @@
         }
       }
     },
+    "eslint-plugin-angular": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-angular/-/eslint-plugin-angular-4.0.1.tgz",
+      "integrity": "sha512-OaW5G461C2lIkOG+/bhnBoXB9UQm/r0Dj2Qf9uiIN0/ncvf2Llp30L0q1tqWkN8/CxyBwQKh1v0hpCLLDjaIKQ==",
+      "dev": true
+    },
     "eslint-plugin-import": {
       "version": "2.19.1",
       "resolved": "https://registry.npmjs.org/eslint-plugin-import/-/eslint-plugin-import-2.19.1.tgz",
@@ -2657,6 +2852,12 @@
         }
       }
     },
+    "extend": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
+      "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g==",
+      "dev": true
+    },
     "extend-shallow": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-3.0.2.tgz",
@@ -2821,6 +3022,38 @@
         "to-regex-range": "^5.0.1"
       }
     },
+    "finalhandler": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.2.tgz",
+      "integrity": "sha512-aAWcW57uxVNrQZqFXjITpW3sIUQmHGG3qSb9mUah9MgMC4NeWhNOlNjXEYq3HjRAvL6arUviZGGJsBg6z0zsWA==",
+      "dev": true,
+      "requires": {
+        "debug": "2.6.9",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "on-finished": "~2.3.0",
+        "parseurl": "~1.3.3",
+        "statuses": "~1.5.0",
+        "unpipe": "~1.0.0"
+      },
+      "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"
+          }
+        },
+        "ms": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
+          "dev": true
+        }
+      }
+    },
     "find-up": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",
@@ -4269,6 +4502,15 @@
       "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",
@@ -4281,6 +4523,12 @@
       "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
       "dev": true
     },
+    "jasmine-core": {
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/jasmine-core/-/jasmine-core-3.5.0.tgz",
+      "integrity": "sha512-nCeAiw37MIMA9w9IXso7bRaLl+c/ef3wnxsoSAlYrzS+Ot0zTG6nU8G/cIfGkqpkjX2wNaIW9RFG0TwIFnG6bA==",
+      "dev": true
+    },
     "js-tokens": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
@@ -4324,6 +4572,66 @@
         "graceful-fs": "^4.1.6"
       }
     },
+    "karma": {
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/karma/-/karma-4.4.1.tgz",
+      "integrity": "sha512-L5SIaXEYqzrh6b1wqYC42tNsFMx2PWuxky84pK9coK09MvmL7mxii3G3bZBh/0rvD27lqDd0le9jyhzvwif73A==",
+      "dev": true,
+      "requires": {
+        "bluebird": "^3.3.0",
+        "body-parser": "^1.16.1",
+        "braces": "^3.0.2",
+        "chokidar": "^3.0.0",
+        "colors": "^1.1.0",
+        "connect": "^3.6.0",
+        "di": "^0.0.1",
+        "dom-serialize": "^2.2.0",
+        "flatted": "^2.0.0",
+        "glob": "^7.1.1",
+        "graceful-fs": "^4.1.2",
+        "http-proxy": "^1.13.0",
+        "isbinaryfile": "^3.0.0",
+        "lodash": "^4.17.14",
+        "log4js": "^4.0.0",
+        "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": "2.3.0"
+      },
+      "dependencies": {
+        "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-chrome-launcher": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/karma-chrome-launcher/-/karma-chrome-launcher-3.1.0.tgz",
+      "integrity": "sha512-3dPs/n7vgz1rxxtynpzZTvb9y/GIaW8xjAwcIGttLbycqoFtI7yo1NGnQi6oFTherRE+GIhCAHZC4vEqWGhNvg==",
+      "dev": true,
+      "requires": {
+        "which": "^1.2.1"
+      }
+    },
+    "karma-jasmine": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/karma-jasmine/-/karma-jasmine-2.0.1.tgz",
+      "integrity": "sha512-iuC0hmr9b+SNn1DaUD2QEYtUxkS1J+bSJSn7ejdEexs7P8EYvA1CWkEdrDQ+8jVH3AgWlCNwjYsT1chjcNW9lA==",
+      "dev": true,
+      "requires": {
+        "jasmine-core": "^3.3"
+      }
+    },
     "kind-of": {
       "version": "6.0.2",
       "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
@@ -4562,6 +4870,19 @@
       "integrity": "sha1-+4m2WpqAKBgz8LdHizpRBPiY67M=",
       "dev": true
     },
+    "log4js": {
+      "version": "4.5.1",
+      "resolved": "https://registry.npmjs.org/log4js/-/log4js-4.5.1.tgz",
+      "integrity": "sha512-EEEgFcE9bLgaYUKuozyFfytQM2wDHtXn4tAN41pkaxpNjAykv11GVdeI4tHtmPWW4Xrgh9R/2d7XYghDVjbKKw==",
+      "dev": true,
+      "requires": {
+        "date-format": "^2.0.0",
+        "debug": "^4.1.1",
+        "flatted": "^2.0.0",
+        "rfdc": "^1.1.4",
+        "streamroller": "^1.0.6"
+      }
+    },
     "loud-rejection": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/loud-rejection/-/loud-rejection-1.6.0.tgz",
@@ -4572,6 +4893,16 @@
         "signal-exit": "^3.0.0"
       }
     },
+    "lru-cache": {
+      "version": "4.1.5",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.5.tgz",
+      "integrity": "sha512-sWZlbEP2OsHNkXrMl5GYk/jKk70MBng6UU4YI/qGDYbgf6YbP4EvmqISbXCoJiRKs+1bSpFHVgQxvJ17F2li5g==",
+      "dev": true,
+      "requires": {
+        "pseudomap": "^1.0.2",
+        "yallist": "^2.1.2"
+      }
+    },
     "map-cache": {
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/map-cache/-/map-cache-0.2.2.tgz",
@@ -4657,6 +4988,12 @@
         }
       }
     },
+    "media-typer": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
+      "integrity": "sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g=",
+      "dev": true
+    },
     "meow": {
       "version": "3.7.0",
       "resolved": "https://registry.npmjs.org/meow/-/meow-3.7.0.tgz",
@@ -4861,6 +5198,12 @@
         }
       }
     },
+    "mime": {
+      "version": "2.4.4",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-2.4.4.tgz",
+      "integrity": "sha512-LRxmNwziLPT828z+4YkNzloCFC2YM4wrB99k+AV5ZbEyfGNWfG8SO1FUXLmLDBSo89NrJZ4DIWeLjy1CHGhMGA==",
+      "dev": true
+    },
     "mime-db": {
       "version": "1.42.0",
       "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.42.0.tgz",
@@ -5494,6 +5837,12 @@
       "integrity": "sha512-7PiHtLll5LdnKIMw100I+8xJXR5gW2QwWYkT6iJva0bXitZKa/XMrSbdmg3r2Xnaidz9Qumd0VPaMrZlF9V9sA==",
       "dev": true
     },
+    "pseudomap": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
+      "integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM=",
+      "dev": true
+    },
     "pump": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
@@ -5510,6 +5859,12 @@
       "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==",
       "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": "6.9.1",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.9.1.tgz",
@@ -5737,6 +6092,12 @@
       "integrity": "sha512-TTlYpa+OL+vMMNG24xSlQGEJ3B/RzEfUlLct7b5G/ytav+wPrplCpVMFuwzXbkecJrb6IYo1iFb0S9v37754mg==",
       "dev": true
     },
+    "rfdc": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/rfdc/-/rfdc-1.1.4.tgz",
+      "integrity": "sha512-5C9HXdzK8EAqN7JDif30jqsBzavB7wLpaubisuQIGHWf2gUXSpzy6ArX/+Da8RjFpagWsCn+pIgxTMAmKw9Zug==",
+      "dev": true
+    },
     "rimraf": {
       "version": "2.6.3",
       "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.3.tgz",
@@ -6362,6 +6723,59 @@
         "limiter": "^1.0.5"
       }
     },
+    "streamroller": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/streamroller/-/streamroller-1.0.6.tgz",
+      "integrity": "sha512-3QC47Mhv3/aZNFpDDVO44qQb9gwB9QggMEE0sQmkTAwBVYdBRWISdsywlkfm5II1Q5y/pmrHflti/IgmIzdDBg==",
+      "dev": true,
+      "requires": {
+        "async": "^2.6.2",
+        "date-format": "^2.0.0",
+        "debug": "^3.2.6",
+        "fs-extra": "^7.0.1",
+        "lodash": "^4.17.14"
+      },
+      "dependencies": {
+        "async": {
+          "version": "2.6.3",
+          "resolved": "https://registry.npmjs.org/async/-/async-2.6.3.tgz",
+          "integrity": "sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==",
+          "dev": true,
+          "requires": {
+            "lodash": "^4.17.14"
+          }
+        },
+        "debug": {
+          "version": "3.2.6",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
+          "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "fs-extra": {
+          "version": "7.0.1",
+          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
+          "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
+          "dev": true,
+          "requires": {
+            "graceful-fs": "^4.1.2",
+            "jsonfile": "^4.0.0",
+            "universalify": "^0.1.0"
+          }
+        },
+        "jsonfile": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
+          "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
+          "dev": true,
+          "requires": {
+            "graceful-fs": "^4.1.6"
+          }
+        }
+      }
+    },
     "string-template": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/string-template/-/string-template-0.2.1.tgz",
@@ -6693,6 +7107,16 @@
       "integrity": "sha512-4dbzIzqvjtgiM5rw1k5rEHtBANKmdudhGyBEajN01fEyhaAIhsoKNy6y7+IN93IfpFtwY9iqi7kD+xwKhQsNJA==",
       "dev": true
     },
+    "type-is": {
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "dev": true,
+      "requires": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
+      }
+    },
     "ua-parser-js": {
       "version": "0.7.17",
       "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.17.tgz",
@@ -6830,6 +7254,16 @@
       "integrity": "sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==",
       "dev": true
     },
+    "useragent": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/useragent/-/useragent-2.3.0.tgz",
+      "integrity": "sha512-4AoH4pxuSvHCjqLO04sU6U/uE65BYza8l/KKBS0b0hnUPWi+cQ2BpeTEwejCSx9SPV5/U03nniDTrWx5NrmKdw==",
+      "dev": true,
+      "requires": {
+        "lru-cache": "4.1.x",
+        "tmp": "0.0.x"
+      }
+    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -6858,6 +7292,12 @@
         "spdx-expression-parse": "^3.0.0"
       }
     },
+    "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
+    },
     "websocket-driver": {
       "version": "0.7.3",
       "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.3.tgz",
@@ -6993,6 +7433,12 @@
       "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE=",
       "dev": true
     },
+    "yallist": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
+      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
+      "dev": true
+    },
     "yargs": {
       "version": "6.4.0",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-6.4.0.tgz",
diff --git a/package.json b/package.json
index 60037b4..a548aa1 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,9 @@
     "lint": "npm run lint:coffee && npm run lint:js",
     "prepublishOnly": "node ./scripts/prepublish.js",
     "prerelease": "npm run build",
-    "release": "sh ./scripts/release.sh"
+    "release": "sh ./scripts/release.sh",
+    "test": "karma start --single-run",
+    "test:watch": "karma start"
   },
   "keywords": [
     "angular-breadcrumbs",
@@ -35,9 +37,11 @@
   "devDependencies": {
     "@uirouter/angularjs": "^1.0.24",
     "angular": "^1.7.9",
+    "angular-mocks": "^1.7.9",
     "chalk": "^3.0.0",
     "eslint": "^6.8.0",
     "eslint-config-airbnb-base": "^14.0.0",
+    "eslint-plugin-angular": "^4.0.1",
     "eslint-plugin-import": "^2.19.1",
     "grunt": "^1.0.4",
     "grunt-browser-sync": "^2.2.0",
@@ -51,6 +55,9 @@
     "grunt-contrib-watch": "^1.1.0",
     "grunt-sass": "^3.1.0",
     "husky": "^3.1.0",
+    "karma": "^4.4.1",
+    "karma-chrome-launcher": "^3.1.0",
+    "karma-jasmine": "^2.0.1",
     "load-grunt-tasks": "^5.1.0",
     "sass": "^1.24.0"
   }
diff --git a/tests/breadcrumb.spec.js b/tests/breadcrumb.spec.js
new file mode 100644
index 0000000..8b99a56
--- /dev/null
+++ b/tests/breadcrumb.spec.js
@@ -0,0 +1,124 @@
+function loadAngularModule(appName, breadcrumbConfig) {
+  const config = ($stateProvider, breadcrumbProvider) => {
+    breadcrumbProvider.configure(breadcrumbConfig);
+
+    const appState = {
+      name: 'app',
+      abstract: true,
+      data: {
+        label: 'App',
+      },
+    };
+
+    const homeState = {
+      name: 'app.home',
+      url: '/home',
+      data: {
+        label: 'Home',
+      },
+      views: {
+        'content@': {
+          template: '',
+        },
+      },
+    };
+
+    const usageState = {
+      name: 'app.home.usage',
+      url: '/usage',
+      data: {
+        label: 'Usage',
+      },
+      views: {
+        'content@': {
+          template: '',
+        },
+      },
+    };
+
+    $stateProvider.state(appState);
+    $stateProvider.state(homeState);
+    $stateProvider.state(usageState);
+  };
+
+  config.$inject = ['$stateProvider', 'breadcrumbProvider'];
+  const app = angular.module(appName, ['ui.router', 'uiBreadcrumbs']);
+  app.config(config);
+
+  return app;
+}
+
+describe('ui.breadcrumbs `abstract` false', () => {
+  loadAngularModule('app', { abstract: false });
+
+  beforeEach(module('app'));
+  let $compile;
+  let $rootScope;
+  let $state;
+
+  beforeEach(inject(($injector) => {
+    $compile = $injector.get('$compile');
+    $rootScope = $injector.get('$rootScope');
+    $state = $injector.get('$state');
+  }));
+
+  it('should respond to the url', () => {
+    expect($state.href('app.home')).toEqual('#!/home');
+  });
+
+  it('should set the render breadcrumbs correctly', () => {
+    const template = '<ui-breadcrumb></ui-breadcrumb>';
+    const element = $compile(template)($rootScope);
+    $rootScope.$digest();
+
+    $state.go('app.home');
+    $rootScope.$digest();
+
+    $rootScope.$broadcast('$viewContentLoaded');
+    $rootScope.$digest();
+
+    expect(element[0].querySelectorAll('li').length).toBe(1);
+    expect(element[0].querySelectorAll('li')[0].textContent).not.toContain('App');
+    expect(element[0].querySelectorAll('li')[0].textContent).toContain('Home');
+
+    $state.go('app.home.usage');
+    $rootScope.$digest();
+
+    $rootScope.$broadcast('$viewContentLoaded');
+    $rootScope.$digest();
+
+    expect(element[0].querySelectorAll('li').length).toBe(2);
+    expect(element[0].querySelectorAll('li')[1].textContent).toContain('Usage');
+  });
+});
+
+describe('ui.breadcrumbs `abstract` true', () => {
+  loadAngularModule('abstractApp', { abstract: true });
+
+  beforeEach(module('abstractApp'));
+  let $compile;
+  let $rootScope;
+  let $state;
+
+  beforeEach(inject(($injector) => {
+    $compile = $injector.get('$compile');
+    $rootScope = $injector.get('$rootScope');
+    $state = $injector.get('$state');
+  }));
+
+  it('should set the render breadcrumbs correctly', () => {
+    const template = '<ui-breadcrumb></ui-breadcrumb>';
+    const element = $compile(template)($rootScope);
+    $rootScope.$digest();
+
+    $state.go('app.home');
+    $rootScope.$digest();
+
+    $rootScope.$broadcast('$viewContentLoaded');
+    $rootScope.$digest();
+
+    expect(element[0].querySelectorAll('li').length).toBe(2);
+    expect(element[0].querySelectorAll('li')[0].textContent).toContain('App');
+    expect(element[0].querySelectorAll('li')[1].textContent).toContain('Home');
+  });
+});