Progress on config manager. Plus tests.

app/scripts/lib/config-manager.js

@@ -1,6 +1,7 @@
 const Migrator = require('pojo-migrator')
 const MetamaskConfig = require('../config.js')
 const migrations = require('./migrations')
+const rp = require('request-promise')
 
 const TESTNET_RPC = MetamaskConfig.network.testnet
 const MAINNET_RPC = MetamaskConfig.network.mainnet
@@ -270,3 +271,29 @@ ConfigManager.prototype.getConfirmed = function () {
   return ('isConfirmed' in data) && data.isConfirmed
 }
 
+ConfigManager.prototype.setCurrentFiat = function (currency) {
+  var data = this.getData()
+  data.fiatCurrency = currency
+  this.setData(data)
+}
+
+ConfigManager.prototype.getCurrentFiat = function () {
+  var data = this.getData()
+  return ('fiatCurrency' in data) && data.fiatCurrency
+}
+
+ConfigManager.prototype.setConversionRate = function () {
+  var data = this.getData()
+  return rp(`https://www.cryptonator.com/api/ticker/eth-${data.fiatCurrency}`)
+  .then(function (response) {
+    data.conversionRate = Number(JSON.parse(response).ticker.price)
+    this.setData(data)
+  }.bind(this)).catch(function (err) {
+    console.log('Error in conversion.', err)
+  })
+}
+
+ConfigManager.prototype.getConversionRate = function () {
+  var data = this.getData()
+  return ('conversionRate' in data) && data.conversionRate
+}

test/unit/config-manager-test.js

@@ -3,6 +3,7 @@ const extend = require('xtend')
 const STORAGE_KEY = 'metamask-persistance-key'
 var configManagerGen = require('../lib/mock-config-manager')
 var configManager
+const rp = require('request-promise')
 
 describe('config-manager', function() {
 
@@ -11,6 +12,86 @@ describe('config-manager', function() {
     configManager = configManagerGen()
   })
 
+  describe('currency conversions', function() {
+
+    describe('#getCurrentFiat', function() {
+      it('should return false if no previous key exists', function() {
+        var result = configManager.getCurrentFiat()
+        assert.ok(!result)
+      })
+    })
+
+    describe('#setCurrentFiat', function() {
+      it('should make getCurrentFiat return true once set', function() {
+        assert.equal(configManager.getCurrentFiat(), false)
+        configManager.setCurrentFiat('usd')
+        var result = configManager.getCurrentFiat()
+        assert.equal(result, 'usd')
+      })
+
+      it('should work with other currencies as well', function() {
+        assert.equal(configManager.getCurrentFiat(), false)
+        configManager.setCurrentFiat('jpy')
+        var result = configManager.getCurrentFiat()
+        assert.equal(result, 'jpy')
+      })
+    })
+
+    describe('#getConversionRate', function() {
+      it('should return false if non-existent', function() {
+        var result = configManager.getConversionRate()
+        assert.ok(!result)
+      })
+    })
+
+    describe('#setConversionRate', function() {
+      it('should retrieve an update for ETH to USD and set it in memory', function(done) {
+        this.timeout(15000)
+        assert.equal(configManager.getConversionRate(), false)
+        var promise = new Promise(
+          function (resolve, reject) {
+            configManager.setCurrentFiat('usd')
+            configManager.setConversionRate().then(function() {
+              resolve()
+            })
+        })
+
+        promise.then(function() {
+          var result = configManager.getConversionRate()
+          assert.equal(typeof result, 'number')
+          done()
+        }).catch(function(err) {
+          console.log(err)
+        })
+
+      })
+
+      it('should work for JPY as well.', function() {
+        this.timeout(15000)
+        assert.equal(configManager.getConversionRate(), false)
+        var promise = new Promise(
+          function (resolve, reject) {
+            configManager.setCurrentFiat('jpy')
+            configManager.setConversionRate().then(function() {
+              resolve()
+            })
+        })
+
+        promise.then(function() {
+          var result = configManager.getConversionRate()
+          assert.equal(typeof result, 'number')
+          done()
+        }).catch(function(err) {
+          console.log(err)
+        })
+      })
+
+      xit('should activate every time the currency is changed.', function() {
+
+      })
+    })
+  })
+
   describe('confirmation', function() {
 
     describe('#getConfirmed', function() {
@@ -215,4 +296,3 @@ describe('config-manager', function() {
     })
   })
 })
-