Mango test suite Windows fixes, closes #1732

Unfortuantely, os:timestamp() on Windows only has millisecond
accuracy. That means that the two Mango tests checking for a positive
value of execution_time fail, since these tests appear to be running
in <1ms on my test setup (a rather anemic Windows VM!)

This change disables only the check for execution_time in two tests,
and leaves the remainder of the execution_stats checks in place
on Windows.

It also introduces a convenience "make.cmd" file so you can
"make check" without typing "make -f Makefile.win check" all the time.

Author: wohali

Makefile.win

@@ -119,6 +119,8 @@ check: all
 	@$(MAKE) -f Makefile.win test-cluster-without-quorum
 	@$(MAKE) -f Makefile.win eunit
 	@$(MAKE) -f Makefile.win javascript
+	@$(MAKE) -f Makefile.win mango-test
+#	@$(MAKE) -f Makefile.win elixir
 
 
 .PHONY: eunit

make.cmd

@@ -0,0 +1,3 @@
+@ECHO OFF
+
+make.exe -f Makefile.win %*

src/mango/test/15-execution-stats-test.py

@@ -12,6 +12,7 @@
 
 
 import mango
+import os
 import unittest
 
 class ExecutionStatsTests(mango.UserDocsTests):
@@ -23,7 +24,10 @@ def test_simple_json_index(self):
         self.assertEqual(resp["execution_stats"]["total_docs_examined"], 3)
         self.assertEqual(resp["execution_stats"]["total_quorum_docs_examined"], 0)
         self.assertEqual(resp["execution_stats"]["results_returned"], 3)
-        self.assertGreater(resp["execution_stats"]["execution_time_ms"], 0)
+        # See https://github.com/apache/couchdb/issues/1732
+        # Erlang os:timestamp() only has ms accuracy on Windows!
+        if os.name != 'nt':
+            self.assertGreater(resp["execution_stats"]["execution_time_ms"], 0)
 
     def test_no_execution_stats(self):
         resp = self.db.find({"age": {"$lt": 35}}, return_raw=True, executionStats=False)
@@ -36,7 +40,10 @@ def test_quorum_json_index(self):
         self.assertEqual(resp["execution_stats"]["total_docs_examined"], 0)
         self.assertEqual(resp["execution_stats"]["total_quorum_docs_examined"], 3)
         self.assertEqual(resp["execution_stats"]["results_returned"], 3)
-        self.assertGreater(resp["execution_stats"]["execution_time_ms"], 0)
+        # See https://github.com/apache/couchdb/issues/1732
+        # Erlang os:timestamp() only has ms accuracy on Windows!
+        if os.name != 'nt':
+            self.assertGreater(resp["execution_stats"]["execution_time_ms"], 0)
 
     def test_results_returned_limit(self):
         resp = self.db.find({"age": {"$lt": 35}}, limit=2, return_raw=True, executionStats=True)