testing: augment of session_do_read

test/session/session_do_read.c

@@ -16,26 +16,45 @@
 #define TEST_BUF TEST_BUF_USED TEST_BUF_UNUSED
 
 int __wrap_read(int fd, void *buf, size_t nbytes) {
-  return sizeof TEST_BUF - 1;
+  return mock_type(int);
 }
 
-void test_session_do_read(void **state) {
+void test_session_do_read__regular(void **state) {
   session sess = {
       .buf = TEST_BUF,
       .buf_used = sizeof TEST_BUF,
       .sd = 2,
   };
   char *line;
-  session_do_read(&sess, &line);
+  will_return(__wrap_read, sizeof TEST_BUF - 1);
+  int ret = session_do_read(&sess, &line);
   assert_memory_equal(line, TEST_BUF_USED, sizeof(TEST_BUF_USED));
+  assert_int_equal(ret, 1);
   free(line);
 }
 
+void test_session_do_read__no_read(void **state) {
+  session sess = {
+      .buf = TEST_BUF,
+      .buf_used = sizeof TEST_BUF,
+      .sd = 2,
+      .state = OP_WAIT,
+  };
+  char *line;
+  will_return(__wrap_read, -1);
+  int ret = session_do_read(&sess, &line);
+  assert_int_equal(ret, 0);
+  assert_int_equal(sess.state, ERR);
+}
+
 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)};
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test(test_session_do_read__regular),
+    cmocka_unit_test(test_session_do_read__no_read)
+  };
 
   return cmocka_run_group_tests(tests, setup, tear_down);
 }