Move test helpers like reload_2_3 and others to basedir

Also add __init__.py to allow relative imports

tests/test_plugin/test_plugin.py

@@ -4,64 +4,12 @@ from mock import patch
 import redis
 
 import os
-import tempfile
-import shutil
+from ..utils_test import create_temp_case, reload_2_3
 
 REDIS_TEST_PORT = status_plugin.REDIS_PORT + 1
 s = status_plugin.s
 
-
-class patched_chdir(object):
-
-    """Just like chdir, but can be used in  `with` - sets back the old path at exit"""
-
-    def __init__(self, new_path):
-        self.old_path = os.getcwd()
-        self.new_path = new_path
-
-    def __enter__(self):
-        os.chdir(self.new_path)
-
-    def __exit__(self, type, value, traceback):
-        os.chdir(self.old_path)
-
-
-def create_temp_case(case_name, path_tmpdir=None):
-    with patched_chdir(os.path.dirname(__file__)):
-        path_test_cases = os.path.abspath("../testcases/")
-        path_case = os.path.join(path_test_cases, case_name)
-
-        path_tmpdir = path_tmpdir or tempfile.mkdtemp()
-        path_tmpdir_case = os.path.join(path_tmpdir, case_name)
-        shutil.copytree(path_case, path_tmpdir_case)
-
-    return path_tmpdir_case
-
-
-def reload_2_3(module_name):
-    '''
-    reload that works in all versions of Python.
-    Uses builtin reload in py2, imp.reload for <=py3.3,
-    importlib.reload for >=3.4
-
-    The module six has similar functionalities,
-    but would be too huge a dependency for this simple case.
-    '''
-
-    from sys import version_info
-    major_ver, minor_ver = version_info[:2]
-
-    if major_ver == 2:
-        reload(module_name)
-    elif major_ver == 3 and minor_ver <= 3:
-        import imp
-        imp.reload(module_name)
-    elif major_ver == 3 and minor_ver >= 4:
-        import importlib
-        importlib.reload(module_name)
-    else:
-        raise NotImplementedError("Not sure how to reload in "
-                                  "this version of Python, supported upto 3.x")
+CASE_BASEDIR = __file__
 
 
 @patch.dict("os.environ",
@@ -72,7 +20,7 @@ def test_whole_1(tmpdir):
     '''
     os.chdir(os.path.dirname(__file__))
     tmpdir = str(tmpdir)
-    path_case = create_temp_case("case_1", tmpdir)
+    path_case = create_temp_case("case_1", CASE_BASEDIR, tmpdir)
     os.chdir(path_case)
 
     assert(os.environ.get("PYTEST_STATUS_PORT") == str(REDIS_TEST_PORT))
@@ -101,7 +49,7 @@ def test_whole_2(tmpdir):
     '''
     os.chdir(os.path.dirname(__file__))
     tmpdir = str(tmpdir)
-    path_case = create_temp_case("case_2", tmpdir)
+    path_case = create_temp_case("case_2", CASE_BASEDIR, tmpdir)
     os.chdir(path_case)
 
     popen_pytest = subprocess.Popen(["py.test", "-s"], shell=True)
@@ -126,7 +74,7 @@ def test_intermediate_1(tmpdir):
     '''
     os.chdir(os.path.dirname(__file__))
     tmpdir = str(tmpdir)
-    path_case = create_temp_case("case_3", tmpdir)
+    path_case = create_temp_case("case_3", CASE_BASEDIR, tmpdir)
     os.chdir(path_case)
 
     popen_pytest = subprocess.Popen(["py.test", "-s"], shell=True)