Check available tcl versions

runtest

@@ -1,9 +1,14 @@
 #!/bin/sh
-TCL=tclsh8.5
-which $TCL
-if [ "$?" != "0" ]
+TCL_VERSIONS="8.5 8.6"
+TCLSH=""
+
+for VERSION in $TCL_VERSIONS; do
+	TCL=`which tclsh$VERSION 2>/dev/null` && TCLSH=$TCL
+done
+
+if [ -z $TCLSH ]
 then
-    echo "You need '$TCL' in order to run the Redis test"
+    echo "You need tcl 8.5 or newer in order to run the Redis test"
     exit 1
 fi
-$TCL tests/test_helper.tcl $*
+$TCLSH tests/test_helper.tcl $*