Add a testsuite using beef bf interpreter

runtests.sh

@@ -0,0 +1,33 @@
+#!/bin/sh
+
+bfc="./bfc"
+beef="beef"
+
+make || exit 1
+
+for bftest in tests/*.bf
+do
+	for input in tests/*.in
+	do
+		beefres=$(tempfile)
+		bfcelf=$(tempfile)
+		bfcelfres=$(tempfile)
+		$beef -i $input $bftest > $beefres
+		$bfc -o $bfcelf $bftest 2>/dev/null
+		chmod +x $bfcelf
+		$bfcelf < $input > $bfcelfres
+
+		diff=$(diff $bfcelfres $beefres)
+		if [ -n "$diff" ]
+		then
+			echo "========"
+			echo "Error : $bftest on $input differs between bfc and beef"
+			diff $bfcelfres $beefres
+			hexdump -C $bfcres 
+			hexdump -C $beefres
+			echo "========"
+		fi
+		echo "$bftest $input [OK]"
+		rm $beefres $bfcres $bfcelf $bfcelfres
+	done
+done

tests/echo.bf

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++[,[.>]<]

tests/hello.in

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+Hello world !
+

tests/helloworld.bf

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+++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.

tests/reverse.bf

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++[<,]# >[>]<-<[<]#>[.>]

tests/rot13.bf

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+>++++++++[>+++++++++++[<<+>>-]<-]<-.++++++++++++++++++++++++..+++++.>++++++++++++[>+++++++[<<->>-]<-]<.>++++++++[>+++++++++++[<<+>>-]<-]<-.--------..+++++.>++++++++++++[>+++++++[<<->>-]<-]<.+.-.++++++++++++++++++++++++++.++++++++++.>+++[>+++++++++++++++++++[<<->>-]<-]<-.