2 files changed, 49 insertions, 2 deletions
diff --git a/source/test/unittests/CMakeLists.txt b/source/test/unittests/CMakeLists.txt
index fe4c902..261b69e 100644
--- a/source/test/unittests/CMakeLists.txt
+++ b/source/test/unittests/CMakeLists.txt
@@ -1,8 +1,8 @@
 target_sources(
   ${KIT_TEST_SUITE}
     PRIVATE
-      async_function.test.c mutex.test.c test_duration.test.c
-      main.test.c string_ref.test.c atomic.test.c thread.test.c
+      async_function.test.c bigint.test.c mutex.test.c
+      test_duration.test.c main.test.c string_ref.test.c atomic.test.c thread.test.c
       array_ref.test.c input_stream.test.c lower_bound.test.c
       condition_variable.test.c mersenne_twister_64.test.c input_buffer.test.c
       move_back.test.c dynamic_array.test.c file.test.c)
diff --git a/source/test/unittests/bigint.test.c b/source/test/unittests/bigint.test.c
new file mode 100644
index 0000000..7df2fcc
--- /dev/null
+++ b/source/test/unittests/bigint.test.c
@@ -0,0 +1,47 @@
+#include "../../kit/bigint.h"
+
+#define KIT_TEST_FILE bigint
+#include "../../kit_test/test.h"
+
+#include <stdio.h>
+
+TEST("bigint hex add") {
+  SZ(foo, "4242424242424242424242424242424242424242");
+  SZ(bar, "1111111111111111111111111111111111111111");
+  SZ(sum, "5353535353535353535353535353535353535353");
+
+  REQUIRE(bi_equal(bi_add(bi_hex(foo), bi_hex(bar)), bi_hex(sum)));
+}
+
+TEST("bigint hex sub") {
+  SZ(foo, "4242424242424242424242424242424242424242");
+  SZ(bar, "1111111111111111111111111111111111111111");
+  SZ(dif, "3131313131313131313131313131313131313131");
+
+  REQUIRE(bi_equal(bi_sub(bi_hex(foo), bi_hex(bar)), bi_hex(dif)));
+}
+
+TEST("bigint base58") {
+  SZ(foo, "31");
+
+  REQUIRE(bi_equal(bi_base58(foo), bi_uword(58 * 2)));
+}
+
+TEST("bigint base58 add") {
+  SZ(foo, "4242424242424242424242424242424242424242");
+  SZ(bar, "2222222222222222222222222222222222222222");
+  SZ(sum, "5353535353535353535353535353535353535353");
+
+  REQUIRE(bi_equal(bi_add(bi_base58(foo), bi_base58(bar)),
+                   bi_base58(sum)));
+}
+
+TEST("bigint base58 sub") {
+  SZ(foo, "42");
+  SZ(bar, "22");
+  SZ(dif, "31");
+
+  REQUIRE(bi_equal(bi_sub(bi_base58(foo), bi_base58(bar)),
+                   bi_base58(dif)));
+}
+