Add a minimal test suite

Introduce a new "test/" sub-directory that contains tests for calcurse.
Right now, it only includes the quick-and-dirty "run-test" helper that
can be used to run and verify tests:

    $ ./run-test test-1 test-2 test-3 test-4
    Running test-1... ok
    Running test-2... ok
    Running test-3... FAIL

Each argument passed to run-test must be a test script located in the
current directory. run-test invokes each script twice and passes the
command line argument "expected" and "actual", respectively. A test case
succeeds if both "expected" and "actual" instances return with a zero
exit status and produce exactly the same output. It fails otherwise.

run-test terminates with a non-zero exit status as soon as one of the
test fails.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

.gitignore

@@ -32,3 +32,6 @@ po/stamp-po
 src/*.o
 src/.deps/
 src/calcurse
+
+test/*.o
+test/run-test

Makefile.am

@@ -2,7 +2,7 @@ AUTOMAKE_OPTIONS= foreign
 
 ACLOCAL_AMFLAGS = -I m4
 
-SUBDIRS = po src
+SUBDIRS = po src test
 
 if ENABLE_DOCS
 SUBDIRS += doc

configure.ac

@@ -145,7 +145,8 @@ AM_XGETTEXT_OPTION([--no-location --keyword=_ --keyword=N_])
 #-------------------------------------------------------------------------------
 #                                                               Create Makefiles
 #-------------------------------------------------------------------------------
-AC_OUTPUT(Makefile doc/Makefile src/Makefile po/Makefile.in po/Makefile)
+AC_OUTPUT(Makefile doc/Makefile src/Makefile test/Makefile po/Makefile.in \
+          po/Makefile)
 #-------------------------------------------------------------------------------
 #                                                                        Summary
 #-------------------------------------------------------------------------------

test/Makefile.am

@@ -0,0 +1,6 @@
+AUTOMAKE_OPTIONS = foreign
+
+check_PROGRAMS = run-test
+
+run_test_SOURCES = run-test.c
+

test/run-test.c

@@ -0,0 +1,241 @@
+/*
+ * Calcurse - text-based organizer
+ *
+ * Copyright (c) 2004-2011 calcurse Development Team <misc@calcurse.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the
+ *        following disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the
+ *        following disclaimer in the documentation and/or other
+ *        materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Send your feedback or comments to : misc@calcurse.org
+ * Calcurse home page : http://calcurse.org
+ *
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/wait.h>
+
+/*
+ * Fork and execute an external process.
+ *
+ * If pfdin and/or pfdout point to a valid address, a pipe is created and the
+ * appropriate file descriptors are written to pfdin/pfdout.
+ */
+static int
+fork_exec (int *pfdin, int *pfdout, const char *path, char *const *arg)
+{
+  int pin[2], pout[2];
+  int pid;
+
+  if (pfdin && (pipe (pin) == -1))
+    return 0;
+  if (pfdout && (pipe (pout) == -1))
+    return 0;
+
+  if ((pid = fork ()) == 0)
+    {
+      if (pfdout)
+        {
+          if (dup2 (pout[0], STDIN_FILENO) < 0)
+            _exit (127);
+          close (pout[0]);
+          close (pout[1]);
+        }
+
+      if (pfdin)
+        {
+          if (dup2 (pin[1], STDOUT_FILENO) < 0)
+            _exit (127);
+          close (pin[0]);
+          close (pin[1]);
+        }
+
+      execvp (path, arg);
+      _exit (127);
+    }
+  else
+    {
+      if (pfdin)
+        close (pin[1]);
+      if (pfdout)
+        close (pout[0]);
+
+      if (pid > 0)
+        {
+          if (pfdin)
+            {
+              fcntl (pin[0], F_SETFD, FD_CLOEXEC);
+              *pfdin = pin[0];
+            }
+          if (pfdout)
+            {
+              fcntl (pout[1], F_SETFD, FD_CLOEXEC);
+              *pfdout = pout[1];
+            }
+        }
+      else
+        {
+          if (pfdin)
+            close (pin[0]);
+          if (pfdout)
+            close (pout[1]);
+          return 0;
+        }
+    }
+  return pid;
+}
+
+/* Wait for a child process to terminate. */
+static int
+child_wait (int *pfdin, int *pfdout, int pid)
+{
+  int stat;
+
+  if (pfdin)
+    close (*pfdin);
+  if (pfdout)
+    close (*pfdout);
+
+  waitpid (pid, &stat, 0);
+  return stat;
+}
+
+/* Print error message and bail out. */
+static void
+die (const char *format, ...)
+{
+  va_list arg;
+
+  va_start (arg, format);
+  fprintf (stderr, "error: ");
+  vfprintf (stderr, format, arg);
+  va_end (arg);
+
+  exit (1);
+}
+
+/* Print usage message. */
+static void
+usage (void)
+{
+  printf ("usage: run-test [-h|--help] <test>...\n");
+}
+
+/* Run test with a specific name. */
+static int
+run_test (const char *name)
+{
+  char filename[BUFSIZ];
+  char *arg1[3], *arg2[3];
+  int pid1 = -1, pin1, pid2 = -1, pin2;
+  FILE *fpin1 = NULL, *fpin2 = NULL;
+  char buf1[BUFSIZ], buf2[BUFSIZ];
+  int ret = 1;
+
+  if (snprintf (filename, BUFSIZ, "./%s", name) >= BUFSIZ)
+    die ("file name too long\n");
+
+  if (access (filename, F_OK) != 0)
+    {
+      if (snprintf (filename, BUFSIZ, "./%s.sh", name) >= BUFSIZ)
+        die ("file name too long\n");
+
+      if (access (filename, F_OK) != 0)
+        die ("test not found: %s\n", name);
+    }
+
+  if (access (filename, X_OK) != 0)
+    die ("script is not executable: %s\n", filename);
+
+  arg1[0] = arg2[0] = filename;
+  arg1[1] = "expected";
+  arg2[1] = "actual";
+  arg1[2] = arg2[2] = NULL;
+
+  printf ("Running %s...", name);
+
+  if ((pid1 = fork_exec (&pin1, NULL, *arg1, arg1)) < 0)
+    die("failed to execute %s: %s\n", filename, strerror (errno));
+
+  if ((pid2 = fork_exec (&pin2, NULL, *arg2, arg2)) < 0)
+    die("failed to execute %s: %s\n", filename, strerror (errno));
+
+  fpin1 = fdopen (pin1, "r");
+  fpin2 = fdopen (pin2, "r");
+
+  while (fgets (buf1, BUFSIZ, fpin1) > 0)
+    {
+      if (fgets (buf2, BUFSIZ, fpin2) <= 0 || strcmp (buf1, buf2) != 0)
+        {
+          ret = 0;
+          break;
+        }
+    }
+
+  if (fpin1)
+    fclose (fpin1);
+  if (fpin2)
+    fclose (fpin2);
+
+  if (child_wait (&pin1, NULL, pid1) != 0)
+    ret = 0;
+  if (child_wait (&pin2, NULL, pid2) != 0)
+    ret = 0;
+
+  if (ret == 1)
+    printf (" ok\n");
+  else
+    printf (" FAIL\n");
+
+  return ret;
+}
+
+int
+main (int argc, char **argv)
+{
+  int i;
+
+  if (!argv[1])
+    die ("no tests specified, bailing out\n");
+  else if (strcmp (argv[1], "-h") == 0 || strcmp (argv[1], "--help") == 0)
+    {
+      usage();
+      return 0;
+    }
+
+  for (i = 1; i < argc; i++)
+    {
+      if (!run_test (argv[i]))
+        return 1;
+    }
+
+  return 0;
+}