1) warn user that espresso tests delete contacts

2) don't leak verification code in logs

// FREEBIE

build.gradle

@@ -244,7 +244,12 @@ if (propFile.canRead()){
     android.buildTypes.release.signingConfig = null
 }
 
-if (project.hasProperty('espresso')) {
+if (project.hasProperty('espresso') && System.console() != null) {
+    println '____________________WARNING_____________________'
+    println 'ALL YOUR CONTACTS WILL BE DELETED IN THE PROCESS'
+    println 'OF RUNNING THESE TESTS, TYPE ENTER TO CONTINUE'
+    System.console().readLine(':')
+
     android.productFlavors {
         base {}
         espresso {

test/androidTestEspresso/java/org/thoughtcrime/securesms/TextSecureEspressoTestCase.java

@@ -108,7 +108,7 @@ public class TextSecureEspressoTestCase<T extends Activity> extends ActivityInst
     pstnNumber       = pstnString.split(":")[1];
     verificationCode = RegistrationBypassUtil.getVerificationCodeForPstnString(context, pstnString);
 
-    Log.d(TAG, "using pstn id of " + pstnString + " with verification code " + verificationCode);
+    Log.d(TAG, "using pstn string of " + pstnString);
   }
 
   @Override