Windows WML tests: Port .sh test script to .cmd

WML tests are read from wml_test_schedule, executed and their error code
is compared to the expected result.

projectfiles/VC9/WML_tests.cmd

@@ -0,0 +1,26 @@
+:: WML_tests.cmd : Run the WML unit tests specified in wml_test_schedule
+
+:: preamble: don't spam stdout with commands, don't expand ERRORLEVEL to 0
+@echo off
+setlocal enabledelayedexpansion
+
+set LoadFile=wml_test_schedule
+set binary=wesnoth.exe
+set opt=--log-strict=warning
+
+cd ..\..\
+
+:: ignore lines beginning with #
+:: %%G contains whether the test should pass (0), timeout (2) or fail (1,4)
+:: %%H is the name of the WML unit test to be executed
+for /f "eol=# tokens=1,2 delims= " %%G in (%LoadFile%) do (
+    :: WindowsTimeout is more reliable than the --timeout option
+    WindowsTimeout.exe "%binary% %opt% -u %%H" 20000
+    if !ERRORLEVEL! neq %%G (
+        echo WML_tests.cmd: Error WML1: Test '%%H' returned !ERRORLEVEL!, expected %%G
+    )
+)
+
+:: restore the state before execution
+cd %~p0
+echo on