3 files changed, 152 insertions, 0 deletions
diff --git a/src/grep/tests/empty b/src/grep/tests/empty
new file mode 100755
index 0000000..92f50bb
--- /dev/null
+++ b/src/grep/tests/empty
@@ -0,0 +1,82 @@
+#! /bin/sh
+# test that the empty file means no pattern
+# and an empty pattern means match all.
+#
+# Copyright (C) 2001, 2006, 2009-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_timeout_
+
+failures=0
+
+for locale in C en_US.UTF-8; do
+    for options in '-E' '-F'; do
+
+        # should return 0 found a match
+        echo "" | LC_ALL=$locale timeout 10s grep $options -e ''
+        if test $? -ne 0 ; then
+          echo "Status: Wrong status code, test \#1 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 1 found no match
+        echo abcd | LC_ALL=$locale timeout 10s grep $options -f /dev/null
+        if test $? -ne 1 ; then
+          echo "Status: Wrong status code, test \#2 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 0 found a match
+        echo abcd \
+            | LC_ALL=$locale timeout 10s grep $options -f /dev/null -e abcd
+        if test $? -ne 0 ; then
+          echo "Status: Wrong status code, test \#3 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 0 found a match
+        echo "" | LC_ALL=$locale timeout 10s grep $options -e ''
+        if test $? -ne 0 ; then
+          echo "Status: Wrong status code, test \#4 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 0 found a match
+        echo abcd | LC_ALL=$locale timeout 10s grep $options -e ''
+        if test $? -ne 0 ; then
+          echo "Status: Wrong status code, test \#5 failed ($options $locale)"
+          failures=1
+        fi
+    done
+
+    for options in '-E -w' '-E -x' '-E -w -x' '-F -w' '-F -x' '-F -w -x'; do
+
+        # should return 0 found a match
+        echo "" | LC_ALL=$locale timeout 10s grep $options -e ''
+        if test $? -ne 0 ; then
+          echo "Status: Wrong status code, test \#6 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 1 found no match
+        echo abcd | LC_ALL=$locale timeout 10s grep $options -f /dev/null
+        if test $? -ne 1 ; then
+          echo "Status: Wrong status code, test \#7 failed ($options $locale)"
+          failures=1
+        fi
+
+        # should return 1 found no match
+        echo abcd | LC_ALL=$locale timeout 10s grep $options -f /dev/null -e ""
+        if test $? -ne 1 ; then
+          echo "Status: Wrong status code, test \#8 failed ($options $locale)"
+          failures=1
+        fi
+    done
+done
+
+Exit $failures
diff --git a/src/grep/tests/empty-line b/src/grep/tests/empty-line
new file mode 100755
index 0000000..25e9509
--- /dev/null
+++ b/src/grep/tests/empty-line
@@ -0,0 +1,41 @@
+#! /bin/sh
+# Test that the empty pattern matches everything.
+# Some of these tests failed in grep 2.18.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+printf 'abc\n' >in || framework_failure_
+nl='
+'
+
+for opt in '' -E -F; do
+  case $opt in
+    '') prefix='\(\)\1';;
+    -E) prefix='()\1';;
+    -F) prefix="foo$nl";;
+  esac
+
+  for pattern in "" "$nl" "---$nl" "${nl}foo"; do
+    for pat in "$pattern" "$prefix$pattern"; do
+      grep $opt -e "$pat" in >out || fail=1
+      compare in out || fail=1
+
+      printf -- '%s\n' "$pat" >pat || framework_failure_
+      grep $opt -f pat in >out || fail=1
+      compare in out || fail=1
+
+      # Check that pattern files that end in non-newlines
+      # are treated as if a newline were appended.
+      case $pattern in
+        '' | *"$nl") ;;
+        *)
+          printf -- '%s' "$pat" >pat || framework_failure_
+          grep $opt -f pat in >out || fail=1
+          compare in out || fail=1;;
+      esac
+    done
+  done
+done
+
+Exit $fail
diff --git a/src/grep/tests/empty-line-mb b/src/grep/tests/empty-line-mb
new file mode 100755
index 0000000..579921d
--- /dev/null
+++ b/src/grep/tests/empty-line-mb
@@ -0,0 +1,29 @@
+#! /bin/sh
+# Exercise bugs in grep-2.13 with -i, -n and an RE of ^$ in a multi-byte locale.
+#
+# Copyright (C) 2012-2021 Free Software Foundation, Inc.
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+
+LC_ALL=en_US.UTF-8
+export LC_ALL
+
+printf 'a\n\nb\n' > in || framework_failure_
+printf '2:\n' > exp || framework_failure_
+
+printf 'a\nb\n' > in2 || framework_failure_
+
+grep -n -i '^$' in > out || fail=1
+compare exp out || fail=1
+
+# Expect no match: with grep-2.13 this would mistakenly exit 0
+grep -i '^$' in2 > out && fail=1
+compare /dev/null out || fail=1
+
+Exit $fail