Let's at least add one modpow test.

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/test-BigInt.cc b/tests/test-BigInt.cc
index df69e64..56f195b 100644
--- a/tests/test-BigInt.cc
+++ b/tests/test-BigInt.cc
@@ -16,5 +16,20 @@ void MainTask::Do() {
         TAssert(a.toString() == s);
     }
 
+    {
+        BigInt a, b, m, r, c;
+
+        // random values; c is computed by wolfram alpha.
+        a.set("23475098273405987234905872394051923847902348567");
+        b.set("3234057230495872034923458723049857203948572039485734598276345987");
+        m.set("534287528093746598127364987236459872634587");
+
+        c.set("211833264233843026809053124694679687014311");
+
+        r = a.modpow(b, m);
+
+        TAssert(r == c);
+    }
+
     Printer::log(M_STATUS, "Test::BigInt passed.");
 }