refactoring; finishing integration of CMocka; several test cases covered

test/session/session_do_read.c

@@ -0,0 +1,41 @@
+#include <cmocka.h>
+#include <setjmp.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <main.h>
+#include <session.h>
+#include <string.h>
+
+#define TEST_BUF_USED "Voluptas voluptate reprehenderit eum voluptatibus.\n"
+#define TEST_BUF_UNUSED                                                        \
+  "Impedit et rerum ut aut vel nisi. Animi et vero nihil aut possimus "        \
+  "commodi. Autem dolorem et officia provident.\n"
+#define TEST_BUF TEST_BUF_USED TEST_BUF_UNUSED
+
+int __wrap_read(int fd, void *buf, size_t nbytes) {
+  return sizeof TEST_BUF - 1;
+}
+
+void test_session_do_read(void **state) {
+  session sess = {
+      .buf = TEST_BUF,
+      .buf_used = sizeof TEST_BUF,
+      .sd = 2,
+  };
+  char *line;
+  session_do_read(&sess, &line);
+  assert_memory_equal(line, TEST_BUF_USED, sizeof(TEST_BUF_USED));
+  free(line);
+}
+
+int setup(void **state) { return 0; }
+int tear_down(void **state) { return 0; }
+
+int main(int argc, char **argv) {
+  const struct CMUnitTest tests[] = {cmocka_unit_test(test_session_do_read)};
+
+  return cmocka_run_group_tests(tests, setup, tear_down);
+}