Add more unit tests for command line option parsing

src/cmdline.c

@@ -227,6 +227,10 @@ static int alignment(opt_t *result, char *optarg)
  */
 static int command_line_design(opt_t *result, char *optarg)
 {
+    if (strlen(optarg) == 0) {
+        bx_fprintf(stderr, "%s: empty command line design definition\n", PROJECT);
+        return 2;
+    }
     result->cld = (char *) strdup(optarg);
     if (result->cld == NULL) {
         perror(PROJECT);

utest/cmdline_test.c

@@ -429,4 +429,40 @@ void test_inputfiles_actual_success(void **state)
 }
 
 
+void test_command_line_design_empty(void **state)
+{
+    (void) state;  /* unused */
+
+    opt_t *actual = act(2, "-c", "");
+
+    assert_null(actual);   // invalid option, so we would need to exit with error
+    assert_int_equal(1, collect_err_size);
+    assert_string_equal("boxes: empty command line design definition\n", collect_err[0]);
+}
+
+
+void test_help(void **state)
+{
+    (void) state;  /* unused */
+
+    opt_t *actual = act(1, "-h");
+
+    assert_non_null(actual);
+    assert_int_equal(1, actual->help);
+    assert_int_equal(0, actual->version_requested);
+}
+
+
+void test_version_requested(void **state)
+{
+    (void) state;  /* unused */
+
+    opt_t *actual = act(1, "-v");
+
+    assert_non_null(actual);
+    assert_int_equal(0, actual->help);
+    assert_int_equal(1, actual->version_requested);
+}
+
+
 /*EOF*/                                          /* vim: set cindent sw=4: */

utest/cmdline_test.h

@@ -63,6 +63,11 @@ void test_inputfiles_stdin(void **state);
 void test_inputfiles_input_nonexistent(void **state);
 void test_inputfiles_actual_success(void **state);
 
+void test_command_line_design_empty(void **state);
+
+void test_help(void **state);
+void test_version_requested(void **state);
+
 
 #endif
 

utest/main.c

@@ -78,7 +78,10 @@ int main(void)
         cmocka_unit_test_setup(test_inputfiles_stdin_stdout, beforeTest),
         cmocka_unit_test_setup(test_inputfiles_stdin, beforeTest),
         cmocka_unit_test_setup(test_inputfiles_input_nonexistent, beforeTest),
-        cmocka_unit_test_setup(test_inputfiles_actual_success, beforeTest)
+        cmocka_unit_test_setup(test_inputfiles_actual_success, beforeTest),
+        cmocka_unit_test_setup(test_command_line_design_empty, beforeTest),
+        cmocka_unit_test_setup(test_help, beforeTest),
+        cmocka_unit_test_setup(test_version_requested, beforeTest)
     };
 
     const struct CMUnitTest regulex_tests[] = {