Fixed a few bugs in runtests.py for running python commands on windows

To run runtests.py on windows, we need to add python.exe to windows PATH var
To run with different python versions, one way to do it is to update PATH var before calling runtests.py

Author: Zhen Li

neokit

@@ -45,6 +45,13 @@
 is_windows = (name == 'nt')
 
 
+def runpymodule(command):
+    commands = command.split()
+    if is_windows:
+        commands = ['powershell.exe', 'python', '-m'] + commands
+    return run0(commands)
+
+
 def runcommand(command):
     commands = command.split()
     return runcommands(commands)
@@ -88,7 +95,7 @@ def main():
 
         stdout.write("Using python version:\n")
         runcommand('python --version')
-        runcommand('pip install --upgrade -r ./test_requirements.txt')
+        runpymodule('pip install --upgrade -r ./test_requirements.txt')
         retcode = 0
 
         register(neorun, '--stop=' + NEO4J_HOME)
@@ -106,16 +113,16 @@ def main():
                 retcode = 2
 
             elif opt == "--tests":
-                retcode = retcode or runcommand(UNITTEST_RUNNER + "test")
+                retcode = retcode or runpymodule(UNITTEST_RUNNER + "test")
             elif opt == "--test=":
-                retcode = retcode or runcommand(UNITTEST_RUNNER + arg)
+                retcode = retcode or runpymodule(UNITTEST_RUNNER + arg)
             elif opt == "--example":
-                retcode = retcode or runcommand(UNITTEST_RUNNER + "examples")
+                retcode = retcode or runpymodule(UNITTEST_RUNNER + "examples")
             elif opt == "--tck":
-                retcode = runcommand('coverage report --show-missing') or\
-                runcommands(["python", "-c", "from test.tck.configure_feature_files import *; set_up()"]) or\
-                runcommand(BEHAVE_RUNNER) or\
-                runcommands(["python", "-c", "from test.tck.configure_feature_files import *; clean_up()"])
+                retcode = runpymodule('coverage report --show-missing') or \
+                          runcommands(["python", "-c", "\"from test.tck.configure_feature_files import *; set_up()\""]) or \
+                          runpymodule(BEHAVE_RUNNER) or \
+                          runcommands(["python", "-c", "\"from test.tck.configure_feature_files import *; clean_up()\""])
 
             if retcode != 0:
                 break