move instrumentation test to unit tests

Closes #4593
// FREEBIE

test/unitTest/java/org/thoughtcrime/securesms/service/SmsListenerTest.java

@@ -0,0 +1,48 @@
+package org.thoughtcrime.securesms.service;
+
+import junit.framework.AssertionFailedError;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.thoughtcrime.securesms.BaseUnitTest;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Matchers.anyBoolean;
+import static org.mockito.Matchers.contains;
+import static org.mockito.Mockito.when;
+
+public class SmsListenerTest extends BaseUnitTest {
+  private static Map<String, String> CHALLENGES = new HashMap<String,String>() {{
+      put("Your TextSecure verification code: 337-337",        "337337");
+      put("XXX\nYour TextSecure verification code: 1337-1337", "13371337");
+      put("Your TextSecure verification code: 337-1337",       "3371337");
+      put("Your TextSecure verification code: 1337-337",       "1337337");
+      put("Your TextSecure verification code: 1337-1337",      "13371337");
+      put("XXXYour TextSecure verification code: 1337-1337",   "13371337");
+      put("Your TextSecure verification code: 1337-1337XXX",   "13371337");
+  }};
+
+  private SmsListener listener;
+
+  @Before
+  @Override
+  public void setUp() throws Exception {
+    super.setUp();
+    listener = new SmsListener();
+    when(sharedPreferences.getBoolean(contains("pref_verifying"), anyBoolean())).thenReturn(true);
+  }
+
+  @Test
+  public void testChallenges() throws Exception {
+    for (Entry<String,String> challenge : CHALLENGES.entrySet()) {
+      if (!listener.isChallenge(context, challenge.getKey())) {
+        throw new AssertionFailedError("SmsListener didn't recognize body as a challenge.");
+      }
+      assertEquals(listener.parseChallenge(challenge.getKey()), challenge.getValue());
+    }
+  }
+}