in firebase-testlab-instr-lib/testlab-instr-lib/src/main/java/com/google/firebase/testlab/screenshot/FirebaseScreenCaptureProcessor.java [40:51]
protected String getDefaultFilename() {
for (StackTraceElement element : Thread.currentThread().getStackTrace()) {
String elementClassName = element.getClassName();
String elementMethodName = element.getMethodName();
if (isJunit3Test(elementMethodName) ||
isJUnit4Test(elementClassName, elementMethodName)) {
return getFilename(elementClassName + mFileNameDelimiter + elementMethodName);
}
}
return getFilename("UnknownTestClass" + mFileNameDelimiter + "unknownTestMethod");
}