Add additional testcases for cat(1)

Verify the following additional cases:
- -s (in isolation, in addition to the -se testcase obtained via the
      NetBSD test).
- -vt

Submitted by:	shivansh
Reviewed by:	asomers (earlier diff), ngie
MFC after:	1 month
Sponsored by:	Google, Inc (GSoC 2017)
Differential Revision:	D11020

bin/cat/tests/Makefile

@@ -8,6 +8,10 @@ ${PACKAGE}FILES+=		d_align.in
 ${PACKAGE}FILES+=		d_align.out
 ${PACKAGE}FILES+=		d_se_output.in
 ${PACKAGE}FILES+=		d_se_output.out
+${PACKAGE}FILES+=		d_s_output.in
+${PACKAGE}FILES+=		d_s_output.out
+${PACKAGE}FILES+=		d_vt_output.in
+${PACKAGE}FILES+=		d_vt_output.out
 
 .include <netbsd-tests.test.mk>
 

contrib/netbsd-tests/bin/cat/d_s_output.in

@@ -0,0 +1,6 @@
+a b c
+
+
+1 2 3
+
+x y z

contrib/netbsd-tests/bin/cat/d_s_output.out

@@ -0,0 +1,5 @@
+a b c
+
+1 2 3
+
+x y z

contrib/netbsd-tests/bin/cat/d_vt_output.in

@@ -0,0 +1,3 @@
+	
+<BS>
+<EFBFBD>

contrib/netbsd-tests/bin/cat/d_vt_output.out

@@ -0,0 +1,3 @@
+^I
+^X<BS>
+M-a

contrib/netbsd-tests/bin/cat/t_cat.sh

@@ -63,9 +63,50 @@ se_output_body() {
 		-x "cat -se $(atf_get_srcdir)/d_se_output.in"
 }
 
+# Begin FreeBSD
+atf_test_case s_output
+s_output_head() {
+	atf_set "descr" "Test that cat(1) squeezes multiple adjacent " \
+			"empty lines producing a single spaced output with option '-s'"
+}
+
+s_output_body() {
+	atf_check -s ignore -o file:$(atf_get_srcdir)/d_s_output.out \
+		cat -s $(atf_get_srcdir)/d_s_output.in
+}
+
+atf_test_case e_output
+e_output_head() {
+	atf_set "descr" "Test that cat(1) prints a $ sign " \
+			"on blank lines with option '-e'"
+}
+
+e_output_body() {
+	atf_check -s ignore -o file:$(atf_get_srcdir)/d_se_output.out \
+		cat -e $(atf_get_srcdir)/d_se_output.in
+}
+
+atf_test_case vt_output
+vt_output_head() {
+	atf_set "descr" "Test that cat(1) displays non-printing characters, " \
+			"namely control characters, tab character and meta-characters " \
+			"using options '-vt'"
+}
+
+vt_output_body() {
+	atf_check -s ignore -o file:$(atf_get_srcdir)/d_vt_output.out \
+		cat -vt $(atf_get_srcdir)/d_vt_output.in
+}
+# End FreeBSD
+
 atf_init_test_cases()
 {
 	atf_add_test_case align
 	atf_add_test_case nonexistent
 	atf_add_test_case se_output
+# Begin FreeBSD
+	atf_add_test_case s_output
+	atf_add_test_case e_output
+	atf_add_test_case vt_output
+# End FreeBSD
 }