Implement static method for creating a randomized JSDescription

src/test/transaction_tests.cpp

@@ -368,6 +368,32 @@ BOOST_AUTO_TEST_CASE(test_basic_joinsplit_verification)
         BOOST_CHECK(!test.Verify(*p, pubKeyHash));
     }
 
+    {
+        boost::array<size_t, ZC_NUM_JS_INPUTS> inputMap;
+        boost::array<size_t, ZC_NUM_JS_OUTPUTS> outputMap;
+        auto jsdesc = JSDescription::Randomized(
+            *p, pubKeyHash, rt,
+            inputs, outputs,
+            inputMap, outputMap,
+            0, 0);
+        BOOST_CHECK(jsdesc.Verify(*p, pubKeyHash));
+
+        std::set<size_t> inputSet;
+        for (size_t i = 0; i < ZC_NUM_JS_INPUTS; i++) {
+            inputSet.insert(inputMap[i]);
+        }
+        std::set<size_t> expectedInputSet {0, 1};
+        BOOST_CHECK(expectedInputSet == inputSet);
+
+        std::set<size_t> outputSet;
+        for (size_t i = 0; i < ZC_NUM_JS_OUTPUTS; i++) {
+            outputSet.insert(outputMap[i]);
+        }
+        std::set<size_t> expectedOutputSet {0, 1};
+        BOOST_CHECK(expectedOutputSet == outputSet);
+    }
+
+
     delete p;
 }