Implement os module

lib/resin/index.coffee

@@ -9,4 +9,5 @@ module.exports =
 	device: require('./device/device')
 	ui: require('./ui')
 	cli: require('./cli/cli')
+	os: require('./os/os')
 	config: require('./config')

lib/resin/os/os.coffee

@@ -0,0 +1,7 @@
+exports.generateCacheName = (id, connectionParams) ->
+	result = "#{id}-#{connectionParams.network}"
+
+	if connectionParams.wifiSsid?
+		result += "-#{connectionParams.wifiSsid}"
+
+	return "#{result}-#{Date.now()}"

lib/resin/os/os.spec.coffee

@@ -0,0 +1,36 @@
+_ = require('lodash')
+chai = require('chai')
+expect = chai.expect
+os = require('./os')
+
+APPS =
+	validEthernet:
+		id: 91
+		params:
+			network: 'ethernet'
+	invalidNetworkType:
+		id: 91
+		params:
+			network: 'foobar'
+	validWifi:
+		id: 91
+		params:
+			network: 'wifi'
+			wifiSsid: 'MYSSID'
+
+describe 'OS:', ->
+
+	describe '#generateCacheName()', ->
+
+		describe 'given network is ethernet', ->
+
+			it 'should construct a correct name', ->
+				application = APPS.validEthernet
+				result = os.generateCacheName(application.id, application.params)
+				expect(result).to.equal("#{application.id}-ethernet-#{Date.now()}")
+
+		describe 'given network is wifi', ->
+			it 'should construct a correct name', ->
+				application = APPS.validWifi
+				result = os.generateCacheName(application.id, application.params)
+				expect(result).to.equal("#{application.id}-wifi-#{application.params.wifiSsid}-#{Date.now()}")