Win32 tests and timeout fix (#776)

Unit tests in Windows and a Windows timeout fix

This commit gets our unit tests compiling and running on Windows as well as removes a duplicated `timeval` -> `DWORD` conversion logic in sockcompat.c 

There are minor differences in behavior between Linux and Windows to note:

1.  In Windows, opening a non-existent hangs forever in WSAPoll whereas
    it correctly returns with a "Connection refused" error on Linux.
    For that reason, I simply skip this test in Windows.

    It may be related to this known issue:
    https://daniel.haxx.se/blog/2012/10/10/wsapoll-is-broken/

2.  Timeouts are handled slightly differently in Windows and Linux.  
    In Linux, we intentionally set REDIS_ERR_IO for connection
    timeouts whereas in Windows we set REDIS_ERR_TIMEOUT.  It may be
    prudent to fix this discrepancy although there are almost certainly
    users relying on the current behavior.

1 files changed, 9 insertions, 1 deletions

diff --git a/test.sh b/test.sh
index 2cab9e6..c72bcb0 100755
--- a/test.sh
+++ b/test.sh
@@ -4,7 +4,9 @@ REDIS_SERVER=${REDIS_SERVER:-redis-server}
 REDIS_PORT=${REDIS_PORT:-56379}
 REDIS_SSL_PORT=${REDIS_SSL_PORT:-56443}
 TEST_SSL=${TEST_SSL:-0}
+SKIPS_AS_FAILS=${SKIPS_AS_FAILS-:0}
 SSL_TEST_ARGS=
+SKIPS_ARG=
 
 tmpdir=$(mktemp -d)
 PID_FILE=${tmpdir}/hiredis-test-redis.pid
@@ -67,4 +69,10 @@ fi
 cat ${tmpdir}/redis.conf
 ${REDIS_SERVER} ${tmpdir}/redis.conf
 
-${TEST_PREFIX:-} ./hiredis-test -h 127.0.0.1 -p ${REDIS_PORT} -s ${SOCK_FILE} ${SSL_TEST_ARGS}
+# Wait until we detect the unix socket
+while [ ! -S "${SOCK_FILE}" ]; do sleep 1; done
+
+# Treat skips as failures if directed
+[ "$SKIPS_AS_FAILS" = 1 ] && SKIPS_ARG="--skips-as-fails"
+
+${TEST_PREFIX:-} ./hiredis-test -h 127.0.0.1 -p ${REDIS_PORT} -s ${SOCK_FILE} ${SSL_TEST_ARGS} ${SKIPS_ARG}