From b20f5932781fd08f338f06c3ba5e17cc7d6d17d5 Mon Sep 17 00:00:00 2001
From: Valery Ivanov <ivalery111@gmail.com>
Date: Thu, 24 Feb 2022 17:07:30 +0300
Subject: tests: add initial support of unit testing

Signed-off-by: Valery Ivanov <ivalery111@gmail.com>
---
 Makefile.am        |  4 ++++
 README.md          | 19 +++++++++++++++++++
 configure.ac       | 12 ++++++++++++
 tests/Makefile.am  |  7 +++++++
 tests/unit_tests.c | 21 +++++++++++++++++++++
 5 files changed, 63 insertions(+)
 create mode 100644 tests/Makefile.am
 create mode 100644 tests/unit_tests.c

diff --git a/Makefile.am b/Makefile.am
index 9e85669..1ac770c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -17,6 +17,10 @@ if ENABLE_SAMPLES
 SUBDIRS       += sample
 endif
 
+if ENABLE_TESTS
+SUBDIRS       += tests
+endif
+
 if ENABLE_DOXYGEN
 SUBDIRS       += doc
 
diff --git a/README.md b/README.md
index 361fedd..6db0a98 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,25 @@ docker run -it --rm -v $(pwd):$(pwd) --workdir=$(pwd) libnet-builder
 make
 ```
 
+### Running Unit Tests with CMocka
+```bash
+# Running tests in the building Docker ^
+
+./autogen.sh
+./configure --enable-tests
+make
+./tests/libnet_unit_tests
+
+# Approximate output:
+builder$ ./tests/libnet_unit_tests
+[==========] Running 1 test(s).
+[ RUN      ] bool_always_success
+[       OK ] bool_always_success
+[==========] 1 test(s) run.
+[  PASSED  ] 1 test(s).
+builder$
+```
+
 ### Building the Documentation
 
 To build the documentation (optional) you need doxygen and pod2man:
diff --git a/configure.ac b/configure.ac
index 199cf5b..c3ffa26 100644
--- a/configure.ac
+++ b/configure.ac
@@ -40,6 +40,7 @@ AC_CONFIG_FILES([Makefile \
 		 libnet.pc \
                  src/Makefile \
                  sample/Makefile \
+		 tests/Makefile \
 		 win32/Makefile])
 AC_CONFIG_FILES([doc/fixmanpages], [chmod a+x doc/fixmanpages])
 
@@ -177,6 +178,16 @@ AC_ARG_ENABLE([samples],
 AC_MSG_RESULT([$enable_samples])
 AM_CONDITIONAL([ENABLE_SAMPLES], [test "$enable_samples" = "yes"])
 
+# Check for tests enabling
+AC_MSG_CHECKING([enable tests])
+AC_ARG_ENABLE([tests],
+    [AS_HELP_STRING([--enable-tests],[do not enable tests @<:@default=no@:>@])],
+    [enable_tests=$enableval],
+    [enable_tests=no]
+)
+AC_MSG_RESULT([$enable_tests])
+AM_CONDITIONAL([ENABLE_TESTS], [test "$enable_tests" = "yes"])
+
 # what (not) to do if the user disables shared libraries
 AM_CONDITIONAL([COND_SHARED], [test "x$enable_shared" != xno])
 
@@ -375,6 +386,7 @@ AC_MSG_RESULT([
     PIC ........................... ${pic_mode}
     Build Sample Programs ......... ${enable_samples}
     Rebuild docs .................. ${rebuild_docs}
+    Tests.......................... ${enable_tests}
 
 To override options
 
diff --git a/tests/Makefile.am b/tests/Makefile.am
new file mode 100644
index 0000000..fbd5972
--- /dev/null
+++ b/tests/Makefile.am
@@ -0,0 +1,7 @@
+bin_PROGRAMS = libnet_unit_tests
+
+libnet_unit_tests_SOURCES = unit_tests.c
+
+libnet_unit_tests_LDFLAGS = -lcmocka
+
+LDADD = $(top_builddir)/src/libnet.la
\ No newline at end of file
diff --git a/tests/unit_tests.c b/tests/unit_tests.c
new file mode 100644
index 0000000..45ad926
--- /dev/null
+++ b/tests/unit_tests.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include <stdbool.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+/* A test case that does nothing and succeeds. */
+static void bool_always_success(void **state) {
+    (void) state; /* unused */
+
+    bool this_is_true = true;
+
+    assert_true(this_is_true);
+}
+
+int main(void) {
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test(bool_always_success),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}
-- 
cgit v1.2.1