Add a testsuite for libsigrokdecode.

This uses the Check unit testing framework, just like libsigrok.
For now, only a few very basic unit tests are included.

Invocation:

  make check

3 files changed, 195 insertions, 0 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
new file mode 100644
index 0000000..5d04c59
--- /dev/null
+++ b/tests/Makefile.am
@@ -0,0 +1,38 @@
+##
+## This file is part of the libsigrokdecode project.
+##
+## Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program 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 General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+##
+
+if HAVE_CHECK
+
+TESTS = check_main
+
+check_PROGRAMS = ${TESTS}
+
+check_main_SOURCES = \
+	$(top_builddir)/libsigrokdecode.h \
+	check_main.c \
+	check_core.c
+
+check_main_CFLAGS = @check_CFLAGS@
+
+check_main_LDADD = $(top_builddir)/libsigrokdecode.la @check_LIBS@
+
+check_main_CPPFLAGS = $(CPPFLAGS_PYTHON)
+
+endif
diff --git a/tests/check_core.c b/tests/check_core.c
new file mode 100644
index 0000000..cbbb26f
--- /dev/null
+++ b/tests/check_core.c
@@ -0,0 +1,113 @@
+/*
+ * This file is part of the libsigrokdecode project.
+ *
+ * Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include "../libsigrokdecode.h" /* First, to avoid compiler warning. */
+#include <stdlib.h>
+#include <check.h>
+
+static void setup(void)
+{
+	/* Silence libsigrokdecode while the unit tests run. */
+	srd_log_loglevel_set(SRD_LOG_NONE);
+}
+
+static void teardown(void)
+{
+}
+
+/*
+ * Check various basic init related things.
+ *
+ *  - Check whether an srd_init() call with path == NULL works.
+ *    If it returns != SRD_OK (or segfaults) this test will fail.
+ *
+ *  - Check whether a subsequent srd_exit() works.
+ *    If it returns != SRD_OK (or segfaults) this test will fail.
+ */
+START_TEST(test_init_exit)
+{
+	int ret;
+
+	ret = srd_init(NULL);
+	fail_unless(ret == SRD_OK, "srd_init() failed: %d.", ret);
+	ret = srd_exit();
+	fail_unless(ret == SRD_OK, "srd_exit() failed: %d.", ret);
+}
+END_TEST
+
+/*
+ * Check whether nested srd_init()/srd_exit() calls work/fail correctly.
+ * Two consecutive srd_init() calls without any srd_exit() inbetween are
+ * not allowed and should fail. However, two consecutive srd_exit() calls
+ * are currently allowed, the second one will just be a NOP basically.
+ */
+START_TEST(test_init_exit_2)
+{
+	int ret;
+
+	ret = srd_init(NULL);
+	fail_unless(ret == SRD_OK, "srd_init() 1 failed: %d.", ret);
+	ret = srd_init(NULL);
+	fail_unless(ret != SRD_OK, "srd_init() 2 didn't fail: %d.", ret);
+	ret = srd_exit();
+	fail_unless(ret == SRD_OK, "srd_exit() 2 failed: %d.", ret);
+	ret = srd_exit();
+	fail_unless(ret == SRD_OK, "srd_exit() 1 failed: %d.", ret);
+}
+END_TEST
+
+/*
+ * Check whether three nested srd_init()/srd_exit() calls work/fail correctly.
+ */
+START_TEST(test_init_exit_3)
+{
+	int ret;
+
+	ret = srd_init(NULL);
+	fail_unless(ret == SRD_OK, "srd_init() 1 failed: %d.", ret);
+	ret = srd_init(NULL);
+	fail_unless(ret != SRD_OK, "srd_init() 2 didn't fail: %d.", ret);
+	ret = srd_init(NULL);
+	fail_unless(ret != SRD_OK, "srd_init() 3 didn't fail: %d.", ret);
+	ret = srd_exit();
+	fail_unless(ret == SRD_OK, "srd_exit() 3 failed: %d.", ret);
+	ret = srd_exit();
+	fail_unless(ret == SRD_OK, "srd_exit() 2 failed: %d.", ret);
+	ret = srd_exit();
+	fail_unless(ret == SRD_OK, "srd_exit() 1 failed: %d.", ret);
+}
+END_TEST
+
+Suite *suite_core(void)
+{
+	Suite *s;
+	TCase *tc;
+
+	s = suite_create("core");
+
+	tc = tcase_create("init_exit");
+	tcase_add_checked_fixture(tc, setup, teardown);
+	tcase_add_test(tc, test_init_exit);
+	tcase_add_test(tc, test_init_exit_2);
+	tcase_add_test(tc, test_init_exit_3);
+	suite_add_tcase(s, tc);
+
+	return s;
+}
diff --git a/tests/check_main.c b/tests/check_main.c
new file mode 100644
index 0000000..e115064
--- /dev/null
+++ b/tests/check_main.c
@@ -0,0 +1,44 @@
+/*
+ * This file is part of the libsigrokdecode project.
+ *
+ * Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include "../libsigrokdecode.h" /* First, to avoid compiler warning. */
+#include <stdlib.h>
+#include <check.h>
+
+Suite *suite_core(void);
+
+int main(void)
+{
+	int ret;
+	Suite *s;
+	SRunner *srunner;
+
+	s = suite_create("mastersuite");
+	srunner = srunner_create(s);
+
+	/* Add all testsuites to the master suite. */
+	srunner_add_suite(srunner, suite_core());
+
+	srunner_run_all(srunner, CK_VERBOSE);
+	ret = srunner_ntests_failed(srunner);
+	srunner_free(srunner);
+
+	return (ret == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
+}