Rename bash_test to bash_tests

tests/README.md

@@ -789,5 +789,5 @@ class AnInformativeName(metaclass=system_tests.CaseMeta):
 
 ## Bash test cases
 
-- Previously, Exiv2 had some bash test scripts, which were saved as the file `EXIV2_DIR/test/*.sh`. We're going to rewrite them as Python test scripts and save them to the directory `EXIV2_DIR/tests/bash_test`.
+- Previously, Exiv2 had some bash test scripts, which were saved as the file `EXIV2_DIR/test/*.sh`. We're going to rewrite them as Python test scripts and save them to the directory `EXIV2_DIR/tests/bash_tests`.
 - These Python test scripts are based on [unittest](https://docs.python.org/3/library/unittest.html) and written in a common format, which is different from the format described in [Writing new tests](#writing-new-tests), but can be executed compatibly by `python3 runner.py`.

tests/bash_tests/testcases.py

@@ -2,7 +2,7 @@ import unittest
 from system_tests import utils
 
 
-class TestSample(unittest.TestCase):
+class TestCases(unittest.TestCase):
     def test_geotag(self):
         testname      = 'geotag-test'
         jpg           = 'FurnaceCreekInn.jpg'

tests/system_tests.py

@@ -12,7 +12,7 @@ import string
 import unittest
 
 
-from bash_test import utils
+from bash_tests import utils
 
 
 if sys.platform in [ 'win32', 'msys', 'cygwin' ]: