Resolve #88: Testing for get_code_hash

tests/integration/contracts.hpp.in

@@ -22,5 +22,10 @@ namespace eosio::testing {
 
       static std::vector<uint8_t> crypto_primitives_test_wasm() { return read_wasm("${CMAKE_BINARY_DIR}/../unit/test_contracts/crypto_primitives_tests.wasm"); }
       static std::vector<char>    crypto_primitives_test_abi() { return read_abi("${CMAKE_BINARY_DIR}/../unit/test_contracts/crypto_primitives_tests.abi"); }
+
+      static std::vector<uint8_t> get_code_hash_write_test_wasm() { return read_wasm("${CMAKE_BINARY_DIR}/../unit/test_contracts/get_code_hash_write.wasm"); }
+      static std::vector<char>    get_code_hash_write_test_abi() { return read_abi("${CMAKE_BINARY_DIR}/../unit/test_contracts/get_code_hash_write.abi"); }
+      static std::vector<uint8_t> get_code_hash_read_test_wasm() { return read_wasm("${CMAKE_BINARY_DIR}/../unit/test_contracts/get_code_hash_read.wasm"); }
+      static std::vector<char>    get_code_hash_read_test_abi() { return read_abi("${CMAKE_BINARY_DIR}/../unit/test_contracts/get_code_hash_read.abi"); }
    };
 } //ns eosio::testing

tests/integration/get_code_hash_tests.cpp

@@ -0,0 +1,46 @@
+#include <boost/test/unit_test.hpp>
+#include <eosio/testing/tester.hpp>
+#include <eosio/chain/abi_serializer.hpp>
+
+#include <Runtime/Runtime.h>
+
+#include <fc/variant_object.hpp>
+
+#include <contracts.hpp>
+
+using namespace eosio;
+using namespace eosio::testing;
+using namespace eosio::chain;
+using namespace fc;
+
+using mvo = fc::mutable_variant_object;
+
+struct code_hash {
+   uint64_t                    id;
+   fc::sha256                  hash;
+   uint64_t primary_key()      const { return id; }
+};
+FC_REFLECT(code_hash, (id)(hash))
+
+BOOST_AUTO_TEST_SUITE(get_code_hash_tests_suite)
+
+BOOST_FIXTURE_TEST_CASE( get_code_hash_tests, tester ) try {
+   create_accounts( { "test"_n } );
+   produce_block();
+
+   set_code( "test"_n, contracts::get_code_hash_write_test_wasm() );
+   set_abi( "test"_n,  contracts::get_code_hash_write_test_abi().data() );
+
+   produce_blocks();
+   push_action("test"_n, "theaction"_n, "test"_n, mvo());
+   code_hash entry;
+   get_table_entry(entry, "test"_n, "test"_n, "code.hash"_n, 0);
+   wdump((entry.hash));
+
+   set_code( "test"_n, contracts::get_code_hash_read_test_wasm() );
+   produce_blocks();
+
+   push_action("test"_n, "theaction"_n, "test"_n, mvo());
+} FC_LOG_AND_RETHROW()
+
+BOOST_AUTO_TEST_SUITE_END()

tests/unit/test_contracts/CMakeLists.txt

@@ -7,6 +7,8 @@ add_contract(explicit_nested_tests explicit_nested_tests explicit_nested_tests.c
 add_contract(transfer_contract transfer_contract transfer.cpp)
 add_contract(minimal_tests minimal_tests minimal_tests.cpp)
 add_contract(crypto_primitives_tests crypto_primitives_tests crypto_primitives_tests.cpp)
+add_contract(get_code_hash_tests get_code_hash_write get_code_hash_write.cpp)
+add_contract(get_code_hash_tests get_code_hash_read get_code_hash_read.cpp)
 add_contract(capi_tests capi_tests capi/capi.c capi/action.c capi/chain.c capi/crypto.c capi/db.c capi/permission.c
                                    capi/print.c capi/privileged.c capi/system.c capi/transaction.c)
 

tests/unit/test_contracts/get_code_hash_read.cpp

@@ -0,0 +1,27 @@
+#include <eosio/eosio.hpp>
+#include <eosio/action.hpp>
+#include <eosio/name.hpp>
+
+#include "get_code_hash_table.hpp"
+
+class [[eosio::contract]] get_code_hash_tests : public contract {
+public:
+   using contract::contract;
+
+   using hash_table = multi_index<name("code.hash"), code_hash>;
+
+   // Read the old code's hash from database and verify new code's hash differs
+   [[eosio::action]]
+   void theaction() {
+      require_auth(get_self());
+      hash_table hashes(get_self(), get_self().value);
+
+      auto hash = get_code_hash(get_self());
+      check(hash != checksum256(), "Code hash should not be null");
+
+      auto record = hashes.get(0, "Unable to find recorded hash");
+      check(hash != record.hash, "Code hash has not changed");
+      eosio::print("Old hash: ", record.hash, "; new hash: ", hash);
+   }
+};
+

tests/unit/test_contracts/get_code_hash_table.hpp

@@ -0,0 +1,10 @@
+#pragma once
+
+using namespace eosio;
+
+TABLE code_hash {
+   uint64_t                    id;
+   checksum256                 hash;
+   uint64_t primary_key()      const { return id; }
+};
+

tests/unit/test_contracts/get_code_hash_write.cpp

@@ -0,0 +1,28 @@
+#include <eosio/eosio.hpp>
+#include <eosio/action.hpp>
+#include <eosio/name.hpp>
+
+#include "get_code_hash_table.hpp"
+
+class [[eosio::contract]] get_code_hash_tests : public contract {
+public:
+   using contract::contract;
+
+   using hash_table = multi_index<name("code.hash"), code_hash>;
+
+   // Write this code's hash to database
+   [[eosio::action]]
+   void theaction() {
+      require_auth(get_self());
+      hash_table hashes(get_self(), get_self().value);
+
+      auto hash = get_code_hash(get_self());
+      check(hash != checksum256(), "Code hash should not be null");
+
+      hashes.emplace(get_self(), [&hash](auto& t) {
+         t.id = 0;
+         t.hash = hash;
+      });
+   }
+};
+