Add some tests for bignum utilities

Author: olabini

bn_test.go

@@ -0,0 +1,24 @@
+package otr3
+
+import (
+	"math/big"
+	"testing"
+)
+
+func Test_mod_returnsTheValueModAnotherValue(t *testing.T) {
+	result := mod(big.NewInt(7), big.NewInt(3))
+	assertDeepEquals(t, result, big.NewInt(1))
+}
+
+func Test_lt_returnsTrueIfTheLeftIsSmallerThanTheRight(t *testing.T) {
+	assertDeepEquals(t, lt(big.NewInt(3), big.NewInt(7)), true)
+	assertDeepEquals(t, lt(big.NewInt(6), big.NewInt(7)), true)
+	assertDeepEquals(t, lt(big.NewInt(7), big.NewInt(7)), false)
+	assertDeepEquals(t, lt(big.NewInt(8), big.NewInt(7)), false)
+}
+
+func Test_gt_returnsTrueIfTheLeftIsGreaterThanTheRight(t *testing.T) {
+	assertDeepEquals(t, gt(big.NewInt(3), big.NewInt(3)), false)
+	assertDeepEquals(t, gt(big.NewInt(4), big.NewInt(3)), true)
+	assertDeepEquals(t, gt(big.NewInt(7), big.NewInt(3)), true)
+}