Make the Escpos class accept a profile.

This is now used for the block_text function.

test/test_function_text.py

@@ -15,6 +15,7 @@ from __future__ import unicode_literals
 from nose.tools import with_setup
 
 import escpos.printer as printer
+from escpos.printer import Dummy
 import os
 
 import filecmp
@@ -43,3 +44,11 @@ def test_function_text_dies_ist_ein_test_lf():
     instance.text('Dies ist ein Test.\n')
     instance.flush()
     assert(filecmp.cmp('test/Dies ist ein Test.LF.txt', devfile))
+
+
+def test_block_text():
+    printer = Dummy()
+    printer.block_text(
+        "All the presidents men were eating falafel for breakfast.", font='a')
+    assert printer.output == \
+        'All the presidents men were eating falafel\nfor breakfast.'