From 7cc1a446e717362f029e44e5b06ca9cac89552be Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Sat, 26 Apr 2014 18:53:15 +0100
Subject: [PATCH] tests: Add a test of running 'ls --version' and matching the
 output.

---
 .gitignore        |   1 +
 Makefile.am       |   8 ++++-
 test-ls-version.c | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests.h           |  16 +++++++++
 4 files changed, 124 insertions(+), 1 deletion(-)
 create mode 100644 test-ls-version.c

diff --git a/.gitignore b/.gitignore
index e8814ae..959fb48 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,4 +30,5 @@
 /missing
 /stamp-h1
 /test-driver
+/test-ls-version
 /test-spawn
diff --git a/Makefile.am b/Makefile.am
index 1f649ac..b2ac4b3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -39,12 +39,18 @@ example_sshpass_LDADD = libminiexpect.la
 # Tests.
 
 TESTS = $(check_PROGRAMS)
-check_PROGRAMS = test-spawn
+check_PROGRAMS = \
+	test-spawn \
+	test-ls-version
 
 test_spawn_SOURCES = test-spawn.c tests.h miniexpect.h
 test_spawn_CFLAGS = $(PCRE_CFLAGS) -Wall
 test_spawn_LDADD = libminiexpect.la
 
+test_ls_version_SOURCES = test-ls-version.c tests.h miniexpect.h
+test_ls_version_CFLAGS = $(PCRE_CFLAGS) -Wall
+test_ls_version_LDADD = libminiexpect.la
+
 # Clean.
 
 CLEANFILES = *~
diff --git a/test-ls-version.c b/test-ls-version.c
new file mode 100644
index 0000000..3b7bbc6
--- /dev/null
+++ b/test-ls-version.c
@@ -0,0 +1,100 @@
+/* miniexpect test suite
+ * Copyright (C) 2014 Red Hat Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/* Note this test depends on the output of 'ls --version'.  You may
+ * have to extend the regular expressions below if running on a
+ * non-Linux OS.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <assert.h>
+
+#include <pcre.h>
+
+#include "miniexpect.h"
+#include "tests.h"
+
+int
+main (int argc, char *argv[])
+{
+  mexp_h *h;
+  int status, r;
+  pcre *ls_coreutils_re;
+  pcre *ls_busybox_re;
+  const int ovecsize = 12;
+  int ovector[ovecsize];
+  const char *version;
+
+  ls_coreutils_re = test_compile_re ("^ls.* ([.\\d]+)");
+  /* Busybox doesn't actually recognize the --version option, but
+   * it prints out the version string in its error message.
+   */
+  ls_busybox_re = test_compile_re ("^BusyBox v([.\\d+]) ");
+
+  h = mexp_spawnl ("ls", "ls", "--version", NULL);
+  assert (h != NULL);
+
+  switch (mexp_expect (h,
+                       (mexp_regexp[]) {
+                         { 100, ls_coreutils_re },
+                         { 101, ls_busybox_re },
+                         { 0 },
+                       }, ovector, ovecsize)) {
+  case 100:
+  case 101:
+    /* Get the matched version number. */
+    r = pcre_get_substring (h->buffer, ovector, h->pcre_error, 1, &version);
+    if (r < 0) {
+      fprintf (stderr, "error: PCRE error reading version substring: %d\n",
+               r);
+      exit (EXIT_FAILURE);
+    }
+    printf ("ls version = %s\n", version);
+    pcre_free_substring (version);
+    break;
+  case MEXP_EOF:
+    fprintf (stderr, "error: EOF before matching version string\n");
+    exit (EXIT_FAILURE);
+  case MEXP_TIMEOUT:
+    fprintf (stderr, "error: timeout before matching version string\n");
+    exit (EXIT_FAILURE);
+  case MEXP_ERROR:
+    perror ("mexp_expect");
+    exit (EXIT_FAILURE);
+  case MEXP_PCRE_ERROR:
+    fprintf (stderr, "error: PCRE error: %d\n", h->pcre_error);
+    exit (EXIT_FAILURE);
+  }
+
+  status = mexp_close (h);
+  if (status != 0 && !test_is_sighup (status)) {
+    fprintf (stderr, "%s: non-zero exit status from subcommand: ", argv[0]);
+    test_diagnose (status);
+    fprintf (stderr, "\n");
+    exit (EXIT_FAILURE);
+  }
+
+  pcre_free (ls_coreutils_re);
+  pcre_free (ls_busybox_re);
+
+  exit (EXIT_SUCCESS);
+}
diff --git a/tests.h b/tests.h
index e258782..e9b19f3 100644
--- a/tests.h
+++ b/tests.h
@@ -39,4 +39,20 @@ test_diagnose (int status)
     fprintf (stderr, "stopped by signal %d", WSTOPSIG (status));
 }
 
+static pcre *
+test_compile_re (const char *rex)
+{
+  const char *errptr;
+  int erroffset;
+  pcre *ret;
+
+  ret = pcre_compile (rex, 0, &errptr, &erroffset, NULL);
+  if (ret == NULL) {
+    fprintf (stderr, "error: failed to compile regular expression '%s': %s at offset %d\n",
+             rex, errptr, erroffset);
+    exit (EXIT_FAILURE);
+  }
+  return ret;
+}
+
 #endif /* TESTS_H_ */
-- 
1.8.3.1