adds rest list receiver, adds local code storage

- rest class now receives a list as well as single
  messages
- adds support for threaded singleton which takes
  care of continuous checking of the bump server
  to get the most up-to-date list of messages
- adds local data class with tests to get locally saved
  code in preferences

app/src/androidTest/java/com/example/bump/MessageProcessorTest.kt

@@ -1,6 +1,8 @@
 package com.example.bump
 
 import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.internal.runner.InstrumentationConnection
+import androidx.test.platform.app.InstrumentationRegistry
 import org.junit.Assert
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -28,6 +30,15 @@ class MessageProcessorTest {
         Assert.assertEquals(test, decrypted)
     }
 
+    @Test
+    fun setCode() {
+        val test = getRandomString(512)
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        val local = LocalData(appContext)
+        local.code = test
+        Assert.assertEquals(local.code, test)
+    }
+
     companion object {
         @JvmStatic
         fun decryptMessage(code: String, messageData: String): String {

app/src/androidTest/java/com/example/bump/RestCryptTest.kt

@@ -68,9 +68,8 @@ class RestCryptTest{
         val lock = CountDownLatch(1)
 
 
-        fun listTester(resultList: JSONObject) {
+        fun listTester(messages: JSONArray) {
             val message = MessageProcessor(code)
-            val messages: JSONArray = resultList.get("messages") as JSONArray
 
             var messageEncoded = messages[0] as JSONObject
             var messageData = messageEncoded.get("data").toString()