implement fudge dices, complete with unit tests

tests/Makefile.am

@@ -1,6 +1,7 @@
 check_PROGRAMS =	test_dice_simple_roll \
 			test_dice_parse \
 			test_dice_evaluate \
+			test_dice_fudge \
 			test_expr_parse
 
 AM_CFLAGS =	-I../lib ${CMOCKA_CFLAGS}

tests/test_dice_fudge.c

@@ -0,0 +1,127 @@
+/*
+ * This file is part of libdice.
+ *
+ * Copyright (C) 2018 Florian Stinglmayr <florian@n0la.org>
+ *
+ * libdice is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * libdice 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with libdice.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <dice.h>
+
+#include <setjmp.h>
+#include <cmocka.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+static void test_dice_fudge_construct(void **data)
+{
+    dice_t d = dice_new();
+    bool fudge = true;
+
+    dice_get(d, DICEOPTION_FUDGE, &fudge);
+    assert_false(fudge);
+
+    dice_free(d);
+}
+
+static void test_dice_fudge_set(void **data)
+{
+    dice_t d = dice_new();
+    bool fudge = false;
+
+    dice_set(d, DICEOPTION_FUDGE, true);
+    dice_get(d, DICEOPTION_FUDGE, &fudge);
+
+    assert_true(fudge);
+    dice_free(d);
+}
+
+static void test_dice_fudge_roll_one(void **data)
+{
+    dice_t d = dice_new();
+    int result = 0, i = 0;
+
+    dice_set(d, DICEOPTION_FUDGE, true);
+    dice_set(d, DICEOPTION_AMOUNT, 1L);
+
+    for (i = 0; i < 100000; i++) {
+        result = dice_roll(d);
+        assert_true(result >= -1 && result <= 1);
+    }
+
+    dice_free(d);
+}
+
+static void test_dice_fudge_roll_more(void **data)
+{
+    dice_t d = dice_new();
+    int result = 0, i = 0;
+
+    dice_set(d, DICEOPTION_FUDGE, true);
+    dice_set(d, DICEOPTION_AMOUNT, 6L);
+
+    for (i = 0; i < 100000; i++) {
+        result = dice_roll(d);
+        assert_true(result >= -6 && result <= 6);
+    }
+
+    dice_free(d);
+}
+
+static void test_dice_fudge_parse1(void **data)
+{
+    dice_t d = dice_new();
+    int amount = 0, fudge = false;
+
+    assert_true(dice_parse(d, "4dF"));
+
+    dice_get(d, DICEOPTION_AMOUNT, &amount);
+    dice_get(d, DICEOPTION_FUDGE, &fudge);
+
+    assert_int_equal(amount, 4);
+    assert_true(fudge);
+
+    dice_free(d);
+}
+
+static void test_dice_fudge_parse2(void **data)
+{
+    dice_t d = dice_new();
+    int amount = 0, fudge = false;
+
+    assert_true(dice_parse(d, "df"));
+
+    dice_get(d, DICEOPTION_AMOUNT, &amount);
+    dice_get(d, DICEOPTION_FUDGE, &fudge);
+
+    assert_int_equal(amount, 1);
+    assert_true(fudge);
+
+    dice_free(d);
+}
+
+int main(int ac, char **av)
+{
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test(test_dice_fudge_construct),
+        cmocka_unit_test(test_dice_fudge_set),
+        cmocka_unit_test(test_dice_fudge_roll_one),
+        cmocka_unit_test(test_dice_fudge_roll_more),
+        cmocka_unit_test(test_dice_fudge_parse1),
+        cmocka_unit_test(test_dice_fudge_parse2),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}