Add support for spending keys to the basic key store

src/gtest/test_keystore.cpp

@@ -0,0 +1,26 @@
+#include <gtest/gtest.h>
+
+#include "keystore.h"
+#include "zcash/Address.hpp"
+
+TEST(keystore_tests, store_and_retrieve_spending_key) {
+    CBasicKeyStore keyStore;
+
+    std::set<libzcash::PaymentAddress> addrs;
+    keyStore.GetPaymentAddresses(addrs);
+    ASSERT_EQ(0, addrs.size());
+
+    auto sk = libzcash::SpendingKey::random();
+    keyStore.AddSpendingKey(sk);
+
+    auto addr = sk.address();
+    ASSERT_TRUE(keyStore.HaveSpendingKey(addr));
+
+    libzcash::SpendingKey keyOut;
+    keyStore.GetSpendingKey(addr, keyOut);
+    ASSERT_EQ(sk, keyOut);
+
+    keyStore.GetPaymentAddresses(addrs);
+    ASSERT_EQ(1, addrs.size());
+    ASSERT_EQ(1, addrs.count(addr));
+}