Add regression tests for parts of xargs(1).

svn path=/head/; revision=95142

tools/regression/usr.bin/Makefile

@@ -1,5 +1,5 @@
 # $FreeBSD$
 
-SUBDIR=	uudecode uuencode
+SUBDIR=	uudecode uuencode xargs
 
 .include <bsd.subdir.mk>

tools/regression/usr.bin/xargs/Makefile

@@ -0,0 +1,4 @@
+# $FreeBSD$
+
+all:
+	@sh ${.CURDIR}/regress.sh ${.CURDIR}

tools/regression/usr.bin/xargs/regress.I.out

@@ -0,0 +1,4 @@
+The quick brown quick brown quick brown quick brownquick brown quick brown %
+The fox jumped fox jumped fox jumped fox jumpedfox jumped fox jumped %
+The over the lazy over the lazy over the lazy over the lazyover the lazy over the lazy %
+The dog dog dog dogdog dog % dog the

tools/regression/usr.bin/xargs/regress.J.out

@@ -0,0 +1 @@
+The quick brown fox jumped over the lazy dog again.

tools/regression/usr.bin/xargs/regress.L.out

@@ -0,0 +1,2 @@
+quick brown fox jumped over the lazy
+dog

tools/regression/usr.bin/xargs/regress.in

@@ -0,0 +1,4 @@
+quick brown
+fox jumped
+over the lazy
+dog

tools/regression/usr.bin/xargs/regress.normal.out

@@ -0,0 +1 @@
+The quick brown fox jumped over the lazy dog

tools/regression/usr.bin/xargs/regress.sh

@@ -0,0 +1,32 @@
+# $FreeBSD$
+
+# Go into the regression test directory, handed to us by make(1)
+TESTDIR=$1
+if [ -z "$TESTDIR" ]; then
+  TESTDIR=.
+fi
+cd $TESTDIR
+
+for test in normal I J L; do
+  echo "Running test $test"
+  case "$test" in
+  normal)
+    xargs echo The < regress.in | diff -u regress.$test.out -
+    ;;
+  I)
+    xargs -I% echo The % % % %% % % < regress.in | diff -u regress.$test.out -
+    ;;
+  J)
+    xargs -J% echo The % again. < regress.in | diff -u regress.$test.out -
+    ;;
+  L)
+    xargs -L3 echo < regress.in | diff -u regress.$test.out -
+    ;;
+  esac
+  if [ $? -eq 0 ]; then
+    echo "Test $test detected no regression, output matches."
+  else
+    echo "Test $test failed: regression detected.  See above."
+    exit 1
+  fi
+done