diff --git a/.gitignore b/.gitignore
index a0dddc6..7983440 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 .DS_Store
 node_modules
 /dist
+/coverage
 
 # local env files
 .env.local
diff --git a/babel.config.js b/babel.config.js
index 8f9ec2d..64f86fd 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -1,6 +1,7 @@
 module.exports = {
     presets: [
-        '@vue/app'
+        '@vue/app',
+        '@babel/preset-typescript'
     ],
     plugins: [
         ["component", {
diff --git a/jest.config.js b/jest.config.js
new file mode 100644
index 0000000..e3b34b8
--- /dev/null
+++ b/jest.config.js
@@ -0,0 +1,5 @@
+module.exports = {
+    moduleNameMapper: {
+        '@/(.*)': '<rootDir>/src/$1'
+    }
+};
diff --git a/package-lock.json b/package-lock.json
index 1851e56..5885b6a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,6 +9,7 @@
       "version": "v1.9.1",
       "license": "MIT",
       "dependencies": {
+        "@babel/preset-typescript": "^7.16.5",
         "base64-js": "^1.5.1",
         "browser-id3-writer": "^4.4.0",
         "core-js": "^3.16.0",
@@ -25,6 +26,7 @@
       },
       "devDependencies": {
         "@types/crypto-js": "^4.0.2",
+        "@types/jest": "^27.0.3",
         "@vue/cli-plugin-babel": "^4.5.13",
         "@vue/cli-plugin-pwa": "^4.5.13",
         "@vue/cli-plugin-typescript": "^4.5.13",
@@ -44,7 +46,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.16.0.tgz",
       "integrity": "sha512-IF4EOMEV+bfYwOmNxGzSnjR2EmQod7f1UXOpZM3l4i4o4QNwzjtJAu/HxdjHq0aYBvdqMuQEY1eg0nqW9ZPORA==",
-      "dev": true,
       "dependencies": {
         "@babel/highlight": "^7.16.0"
       },
@@ -56,7 +57,6 @@
       "version": "7.16.4",
       "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.16.4.tgz",
       "integrity": "sha512-1o/jo7D+kC9ZjHX5v+EHrdjl3PhxMrLSOTGsOdHJ+KL8HCaEK6ehrVL2RS6oHDZp+L7xLirLrPmQtEng769J/Q==",
-      "dev": true,
       "engines": {
         "node": ">=6.9.0"
       }
@@ -65,7 +65,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.16.5.tgz",
       "integrity": "sha512-wUcenlLzuWMZ9Zt8S0KmFwGlH6QKRh3vsm/dhDA3CHkiTA45YuG1XkHRcNRl73EFPXDp/d5kVOU0/y7x2w6OaQ==",
-      "dev": true,
       "dependencies": {
         "@babel/code-frame": "^7.16.0",
         "@babel/generator": "^7.16.5",
@@ -95,7 +94,6 @@
       "version": "6.3.0",
       "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
       "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
-      "dev": true,
       "bin": {
         "semver": "bin/semver.js"
       }
@@ -104,7 +102,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.16.5.tgz",
       "integrity": "sha512-kIvCdjZqcdKqoDbVVdt5R99icaRtrtYhYK/xux5qiWCBmfdvEYMFZ68QCrpE5cbFM1JsuArUNs1ZkuKtTtUcZA==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.16.0",
         "jsesc": "^2.5.1",
@@ -118,7 +115,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.16.0.tgz",
       "integrity": "sha512-ItmYF9vR4zA8cByDocY05o0LGUkp1zhbTQOH1NFyl5xXEqlTJQCEJjieriw+aFpxo16swMxUnUiKS7a/r4vtHg==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.16.0"
       },
@@ -143,7 +139,6 @@
       "version": "7.16.3",
       "resolved": "https://registry.npmjs.org/@babel/helper-compilation-targets/-/helper-compilation-targets-7.16.3.tgz",
       "integrity": "sha512-vKsoSQAyBmxS35JUOOt+07cLc6Nk/2ljLIHwmq2/NM6hdioUaqEXq/S+nXvbvXbZkNDlWOymPanJGOc4CBjSJA==",
-      "dev": true,
       "dependencies": {
         "@babel/compat-data": "^7.16.0",
         "@babel/helper-validator-option": "^7.14.5",
@@ -161,7 +156,6 @@
       "version": "6.3.0",
       "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
       "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
-      "dev": true,
       "bin": {
         "semver": "bin/semver.js"
       }
@@ -170,7 +164,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.16.5.tgz",
       "integrity": "sha512-NEohnYA7mkB8L5JhU7BLwcBdU3j83IziR9aseMueWGeAjblbul3zzb8UvJ3a1zuBiqCMObzCJHFqKIQE6hTVmg==",
-      "dev": true,
       "dependencies": {
         "@babel/helper-annotate-as-pure": "^7.16.0",
         "@babel/helper-environment-visitor": "^7.16.5",
@@ -235,7 +228,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-environment-visitor/-/helper-environment-visitor-7.16.5.tgz",
       "integrity": "sha512-ODQyc5AnxmZWm/R2W7fzhamOk1ey8gSguo5SGvF0zcB3uUzRpTRmM/jmLSm9bDMyPlvbyJ+PwPEK0BWIoZ9wjg==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.16.0"
       },
@@ -259,7 +251,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.16.0.tgz",
       "integrity": "sha512-BZh4mEk1xi2h4HFjWUXRQX5AEx4rvaZxHgax9gcjdLWdkjsY7MKt5p0otjsg5noXw+pB+clMCjw+aEVYADMjog==",
-      "dev": true,
       "dependencies": {
         "@babel/helper-get-function-arity": "^7.16.0",
         "@babel/template": "^7.16.0",
@@ -273,7 +264,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/@babel/helper-get-function-arity/-/helper-get-function-arity-7.16.0.tgz",
       "integrity": "sha512-ASCquNcywC1NkYh/z7Cgp3w31YW8aojjYIlNg4VeJiHkqyP4AzIvr4qx7pYDb4/s8YcsZWqqOSxgkvjUz1kpDQ==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.16.0"
       },
@@ -285,7 +275,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/@babel/helper-hoist-variables/-/helper-hoist-variables-7.16.0.tgz",
       "integrity": "sha512-1AZlpazjUR0EQZQv3sgRNfM9mEVWPK3M6vlalczA+EECcPz3XPh6VplbErL5UoMpChhSck5wAJHthlj1bYpcmg==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.16.0"
       },
@@ -297,7 +286,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.16.5.tgz",
       "integrity": "sha512-7fecSXq7ZrLE+TWshbGT+HyCLkxloWNhTbU2QM1NTI/tDqyf0oZiMcEfYtDuUDCo528EOlt39G1rftea4bRZIw==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.16.0"
       },
@@ -309,7 +297,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/@babel/helper-module-imports/-/helper-module-imports-7.16.0.tgz",
       "integrity": "sha512-kkH7sWzKPq0xt3H1n+ghb4xEMP8k0U7XV3kkB+ZGy69kDk2ySFW1qPi06sjKzFY3t1j6XbJSqr4mF9L7CYVyhg==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.16.0"
       },
@@ -321,7 +308,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.16.5.tgz",
       "integrity": "sha512-CkvMxgV4ZyyioElFwcuWnDCcNIeyqTkCm9BxXZi73RR1ozqlpboqsbGUNvRTflgZtFbbJ1v5Emvm+lkjMYY/LQ==",
-      "dev": true,
       "dependencies": {
         "@babel/helper-environment-visitor": "^7.16.5",
         "@babel/helper-module-imports": "^7.16.0",
@@ -340,7 +326,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.16.0.tgz",
       "integrity": "sha512-SuI467Gi2V8fkofm2JPnZzB/SUuXoJA5zXe/xzyPP2M04686RzFKFHPK6HDVN6JvWBIEW8tt9hPR7fXdn2Lgpw==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.16.0"
       },
@@ -352,7 +337,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.16.5.tgz",
       "integrity": "sha512-59KHWHXxVA9K4HNF4sbHCf+eJeFe0Te/ZFGqBT4OjXhrwvA04sGfaEGsVTdsjoszq0YTP49RC9UKe5g8uN2RwQ==",
-      "dev": true,
       "engines": {
         "node": ">=6.9.0"
       }
@@ -375,7 +359,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.16.5.tgz",
       "integrity": "sha512-ao3seGVa/FZCMCCNDuBcqnBFSbdr8N2EW35mzojx3TwfIbdPmNK+JV6+2d5bR0Z71W5ocLnQp9en/cTF7pBJiQ==",
-      "dev": true,
       "dependencies": {
         "@babel/helper-environment-visitor": "^7.16.5",
         "@babel/helper-member-expression-to-functions": "^7.16.5",
@@ -391,7 +374,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/@babel/helper-simple-access/-/helper-simple-access-7.16.0.tgz",
       "integrity": "sha512-o1rjBT/gppAqKsYfUdfHq5Rk03lMQrkPHG1OWzHWpLgVXRH4HnMM9Et9CVdIqwkCQlobnGHEJMsgWP/jE1zUiw==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.16.0"
       },
@@ -415,7 +397,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.16.0.tgz",
       "integrity": "sha512-0YMMRpuDFNGTHNRiiqJX19GjNXA4H0E8jZ2ibccfSxaCogbm3am5WN/2nQNj0YnQwGWM1J06GOcQ2qnh3+0paw==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.16.0"
       },
@@ -427,7 +408,6 @@
       "version": "7.15.7",
       "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.15.7.tgz",
       "integrity": "sha512-K4JvCtQqad9OY2+yTU8w+E82ywk/fe+ELNlt1G8z3bVGlZfn/hOcQQsUhGhW/N+tb3fxK800wLtKOE/aM0m72w==",
-      "dev": true,
       "engines": {
         "node": ">=6.9.0"
       }
@@ -436,7 +416,6 @@
       "version": "7.14.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-validator-option/-/helper-validator-option-7.14.5.tgz",
       "integrity": "sha512-OX8D5eeX4XwcroVW45NMvoYaIuFI+GQpA2a8Gi+X/U/cDUIRsV37qQfF905F0htTRCREQIB4KqPeaveRJUl3Ow==",
-      "dev": true,
       "engines": {
         "node": ">=6.9.0"
       }
@@ -460,7 +439,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.16.5.tgz",
       "integrity": "sha512-TLgi6Lh71vvMZGEkFuIxzaPsyeYCHQ5jJOOX1f0xXn0uciFuE8cEk0wyBquMcCxBXZ5BJhE2aUB7pnWTD150Tw==",
-      "dev": true,
       "dependencies": {
         "@babel/template": "^7.16.0",
         "@babel/traverse": "^7.16.5",
@@ -474,7 +452,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.16.0.tgz",
       "integrity": "sha512-t8MH41kUQylBtu2+4IQA3atqevA2lRgqA2wyVB/YiWmsDSuylZZuXOUy9ric30hfzauEFfdsuk/eXTRrGrfd0g==",
-      "dev": true,
       "dependencies": {
         "@babel/helper-validator-identifier": "^7.15.7",
         "chalk": "^2.0.0",
@@ -488,7 +465,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.16.5.tgz",
       "integrity": "sha512-+Ce7T5iPNWzfu9C1aB5tN3Lyafs5xb3Ic7vBWyZL2KXT3QSdD1dD3CvgOzPmQKoNNRt6uauc0XwNJTQtXC2/Mw==",
-      "dev": true,
       "bin": {
         "parser": "bin/babel-parser.js"
       },
@@ -1028,7 +1004,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-typescript/-/plugin-syntax-typescript-7.16.5.tgz",
       "integrity": "sha512-/d4//lZ1Vqb4mZ5xTep3dDK888j7BGM/iKqBmndBaoYAFPlPKrGU608VVBz5JeyAb6YQDjRu1UKqj86UhwWVgw==",
-      "dev": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.16.5"
       },
@@ -1542,6 +1517,22 @@
         "@babel/core": "^7.0.0-0"
       }
     },
+    "node_modules/@babel/plugin-transform-typescript": {
+      "version": "7.16.1",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-typescript/-/plugin-transform-typescript-7.16.1.tgz",
+      "integrity": "sha512-NO4XoryBng06jjw/qWEU2LhcLJr1tWkhpMam/H4eas/CDKMX/b2/Ylb6EI256Y7+FVPCawwSM1rrJNOpDiz+Lg==",
+      "dependencies": {
+        "@babel/helper-create-class-features-plugin": "^7.16.0",
+        "@babel/helper-plugin-utils": "^7.14.5",
+        "@babel/plugin-syntax-typescript": "^7.16.0"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      },
+      "peerDependencies": {
+        "@babel/core": "^7.0.0-0"
+      }
+    },
     "node_modules/@babel/plugin-transform-unicode-escapes": {
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-unicode-escapes/-/plugin-transform-unicode-escapes-7.16.5.tgz",
@@ -1686,6 +1677,22 @@
         "@babel/core": "^7.0.0-0"
       }
     },
+    "node_modules/@babel/preset-typescript": {
+      "version": "7.16.5",
+      "resolved": "https://registry.npmjs.org/@babel/preset-typescript/-/preset-typescript-7.16.5.tgz",
+      "integrity": "sha512-lmAWRoJ9iOSvs3DqOndQpj8XqXkzaiQs50VG/zESiI9D3eoZhGriU675xNCr0UwvsuXrhMAGvyk1w+EVWF3u8Q==",
+      "dependencies": {
+        "@babel/helper-plugin-utils": "^7.16.5",
+        "@babel/helper-validator-option": "^7.14.5",
+        "@babel/plugin-transform-typescript": "^7.16.1"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      },
+      "peerDependencies": {
+        "@babel/core": "^7.0.0-0"
+      }
+    },
     "node_modules/@babel/runtime": {
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.16.5.tgz",
@@ -1701,7 +1708,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.16.0.tgz",
       "integrity": "sha512-MnZdpFD/ZdYhXwiunMqqgyZyucaYsbL0IrjoGjaVhGilz+x8YB++kRfygSOIj1yOtWKPlx7NBp+9I1RQSgsd5A==",
-      "dev": true,
       "dependencies": {
         "@babel/code-frame": "^7.16.0",
         "@babel/parser": "^7.16.0",
@@ -1715,7 +1721,6 @@
       "version": "7.16.5",
       "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.16.5.tgz",
       "integrity": "sha512-FOCODAzqUMROikDYLYxl4nmwiLlu85rNqBML/A5hKRVXG2LV8d0iMqgPzdYTcIpjZEBB7D6UDU9vxRZiriASdQ==",
-      "dev": true,
       "dependencies": {
         "@babel/code-frame": "^7.16.0",
         "@babel/generator": "^7.16.5",
@@ -1736,7 +1741,6 @@
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       "integrity": "sha512-PJgg/k3SdLsGb3hhisFvtLOw5ts113klrpLuIPtCJIU+BB24fqq6lf8RWqKJEjzqXR9AEH1rIb5XTqwBHB+kQg==",
-      "dev": true,
       "dependencies": {
         "@babel/helper-validator-identifier": "^7.15.7",
         "to-fast-properties": "^2.0.0"
@@ -3272,6 +3276,16 @@
         "@types/istanbul-lib-report": "*"
       }
     },
+    "node_modules/@types/jest": {
+      "version": "27.0.3",
+      "resolved": "https://registry.npmjs.org/@types/jest/-/jest-27.0.3.tgz",
+      "integrity": "sha512-cmmwv9t7gBYt7hNKH5Spu7Kuu/DotGa+Ff+JGRKZ4db5eh8PnKS4LuebJ3YLUoyOyIHraTGyULn23YtEAm0VSg==",
+      "dev": true,
+      "dependencies": {
+        "jest-diff": "^27.0.0",
+        "pretty-format": "^27.0.0"
+      }
+    },
     "node_modules/@types/json-schema": {
       "version": "7.0.9",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.9.tgz",
@@ -4322,7 +4336,6 @@
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-      "dev": true,
       "dependencies": {
         "color-convert": "^1.9.0"
       },
@@ -5416,7 +5429,6 @@
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-      "dev": true,
       "dependencies": {
         "caniuse-lite": "^1.0.30001286",
         "electron-to-chromium": "^1.4.17",
@@ -5438,8 +5450,7 @@
     "node_modules/browserslist/node_modules/picocolors": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
-      "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ==",
-      "dev": true
+      "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ=="
     },
     "node_modules/bser": {
       "version": "2.1.1",
@@ -5691,7 +5702,6 @@
       "version": "1.0.30001286",
       "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001286.tgz",
       "integrity": "sha512-zaEMRH6xg8ESMi2eQ3R4eZ5qw/hJiVsO/HlLwniIwErij0JDr9P+8V4dtx1l+kLq6j3yy8l8W4fst1lBnat5wQ==",
-      "dev": true,
       "funding": {
         "type": "opencollective",
         "url": "https://opencollective.com/browserslist"
@@ -5716,7 +5726,6 @@
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
       "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
-      "dev": true,
       "dependencies": {
         "ansi-styles": "^3.2.1",
         "escape-string-regexp": "^1.0.5",
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@@ -22054,6 +22030,16 @@
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@@ -23301,6 +23284,16 @@
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@@ -25108,8 +25099,7 @@
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@@ -25673,8 +25660,7 @@
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-      "dev": true
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@@ -26894,8 +26879,7 @@
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@@ -27052,8 +27036,7 @@
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@@ -27064,8 +27047,7 @@
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-      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
-      "dev": true
+      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ="
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@@ -27940,8 +27922,7 @@
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@@ -28068,8 +28049,7 @@
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@@ -28160,8 +28140,7 @@
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-      "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
-      "dev": true
+      "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0="
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@@ -30739,8 +30718,7 @@
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-      "dev": true
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@@ -30810,8 +30788,7 @@
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@@ -30862,7 +30839,6 @@
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-      "dev": true,
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@@ -31783,8 +31759,7 @@
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-      "dev": true
+      "integrity": "sha512-CqyzN6z7Q6aMeF/ktcMVTzhAHCEpf8SOarwpzpf8pNBY2k5/oM34UHldUwp8VKI7uxct2HxSRdJjBaZeESzcxA=="
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@@ -34382,8 +34357,7 @@
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-      "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
-      "dev": true
+      "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w="
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@@ -34839,7 +34813,6 @@
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-      "dev": true,
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@@ -35258,8 +35231,7 @@
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-      "integrity": "sha1-3F5pjL0HkmW8c+A3doGk5Og/YW4=",
-      "dev": true
+      "integrity": "sha1-3F5pjL0HkmW8c+A3doGk5Og/YW4="
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diff --git a/package.json b/package.json
index 8782e8b..8545852 100644
--- a/package.json
+++ b/package.json
@@ -12,10 +12,12 @@
   "scripts": {
     "serve": "vue-cli-service serve",
     "build": "vue-cli-service build",
+    "test": "jest",
     "fix-compatibility": "node ./src/fix-compatibility.js",
     "make-extension": "node ./make-extension.js"
   },
   "dependencies": {
+    "@babel/preset-typescript": "^7.16.5",
     "base64-js": "^1.5.1",
     "browser-id3-writer": "^4.4.0",
     "core-js": "^3.16.0",
@@ -32,6 +34,7 @@
   },
   "devDependencies": {
     "@types/crypto-js": "^4.0.2",
+    "@types/jest": "^27.0.3",
     "@vue/cli-plugin-babel": "^4.5.13",
     "@vue/cli-plugin-pwa": "^4.5.13",
     "@vue/cli-plugin-typescript": "^4.5.13",
diff --git a/tsconfig.json b/tsconfig.json
index 88ddb2c..b8e44f8 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -14,7 +14,8 @@
     "sourceMap": true,
     "baseUrl": ".",
     "types": [
-      "webpack-env"
+      "webpack-env",
+      "jest"
     ],
     "paths": {
       "@/*": [