java - Android unit testing - "logcat -c" is clearing logs more often than it's supposed to -

i wrote unit tests check whether logging working intended. example, here 1 of methods being tested:

// sampleobject class public void configure(context context) {      log.d(tag, "configuration done."); } 

i want flush logcat before each test logs previous test not picked up. that, wrote clearlogs() method called setup():

private void clearlogs() throws exception {     runtime.getruntime().exec("logcat -c"); }  public void setup() throws exception {     super.setup();     clearlogs();     sampleobject msampleobject = new sampleobject(); } 

and here unit test:

public void testconfigure() throws exception {     string log_configuration_done = "configuration done.";     boolean stringfound = false;     msampleobject.configure(new mockcontext());     process process = runtime.getruntime().exec("logcat -d sampleobject:d *:s");     bufferedreader bufferedreader = new bufferedreader(new inputstreamreader(process.getinputstream()));     string line = "";     while ((line = bufferedreader.readline()) != null) {         if (line.contains(log_configuration_done)) {             stringfound = true;             break;         }     }     asserttrue("log message configure() not found", stringfound); } 

the issue log entry cleared though clearlogs() called in setup(). test works if comment out clearlogs(). have idea i'm doing wrong?

after several weeks, i've discovered cause: logcat -c not clear logs takes several seconds so. however, process appears test application's point of view. result, test case executed afterwards , runs while logs still being cleared. adding short delay of 2 seconds resolved problem.