add duplicate check to CI

.gitignore

@@ -0,0 +1 @@
+node_modules

package.json

@@ -6,5 +6,8 @@
     "test": "node test.js"
   },
   "repository": "[email protected]:saturn-network/assets.git",
-  "license": "MIT"
+  "license": "MIT",
+  "dependencies": {
+    "lodash": "^4.17.15"
+  }
 }

test.js

@@ -1,9 +1,23 @@
 'use strict';
+const _ = require('lodash')
+
+function ensureNoDuplicates(arr) {
+  let allAddresses = _.map(arr, 'address')
+  let lowerCaseAddys = _.map(allAddresses, x => x.toLowerCase())
+  let unique = _.uniq(lowerCaseAddys)
+  if (unique.length !== lowerCaseAddys.length) {
+    throw new Error('Duplicates detected!')
+  }
+}
 
 try {
   let eth = require('./eth/tokens.json')
   let etc = require('./etc/tokens.json')
   console.log('asset.json is valid!')
+
+  ensureNoDuplicates(eth)
+  ensureNoDuplicates(etc)
+
   process.exit(0)
 } catch(e) {
   console.error(e)

yarn.lock

@@ -0,0 +1,8 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+lodash@^4.17.15:
+  version "4.17.15"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
+  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==