Подготовка

Test_Account.cpp

#include <Account.h>
#include <gtest/gtest.h>

TEST(Account, Banking){
	Account test(0,0);
	
	ASSERT_EQ(test.GetBalance(), 0);
	
	ASSERT_THROW(test.ChangeBalance(100), std::runtime_error);
	
	test.Lock();
	
	ASSERT_NO_THROW(test.ChangeBalance(100));
	
	ASSERT_EQ(test.GetBalance(), 100);

	ASSERT_THROW(test.Lock(), std::runtime_error);

	test.Unlock();
	ASSERT_THROW(test.ChangeBalance(100), std::runtime_error);
}

test_Transaction.cpp

#include <Account.h>
#include <Transaction.h>
#include <gtest/gtest.h>

TEST(Transaction, Banking){
	const int base_A = 5000, base_B = 5000, base_fee = 100;
	
	Account Alice(0,base_A), Bob(1,base_B);
	Transaction test_tran;

	ASSERT_EQ(test_tran.fee(), 1);
	test_tran.set_fee(base_fee);
	ASSERT_EQ(test_tran.fee(), base_fee);

	ASSERT_THROW(test_tran.Make(Alice, Alice, 1000), std::logic_error);
	ASSERT_THROW(test_tran.Make(Alice, Bob, -50), std::invalid_argument);
	ASSERT_THROW(test_tran.Make(Alice, Bob, 50), std::logic_error);
	if (test_tran.fee()*2-1 >= 100)
		ASSERT_EQ(test_tran.Make(Alice, Bob, test_tran.fee()*2-1), false);

	Alice.Lock();
	ASSERT_THROW(test_tran.Make(Alice, Bob, 1000), std::runtime_error);
	Alice.Unlock();

	ASSERT_EQ(test_tran.Make(Alice, Bob, 1000), true);
	ASSERT_EQ(Bob.GetBalance(), base_B+1000);	
	ASSERT_EQ(Alice.GetBalance(), base_A-1000-base_fee);

	ASSERT_EQ(test_tran.Make(Alice, Bob, 3900), false);
	ASSERT_EQ(Bob.GetBalance(), base_B+1000);	
	ASSERT_EQ(Alice.GetBalance(), base_A-1000-base_fee);
}

build.yml

cmake_minimum_required(VERSION 3.22)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

option(BUILD_TESTS "Build tests" OFF)

if(BUILD_TESTS)                   
  add_compile_options(--coverage) 
endif()

project (banking)

add_library(banking STATIC ${CMAKE_CURRENT_SOURCE_DIR}/banking/Transaction.cpp ${CMAKE_CURRENT_SOURCE_DIR}/banking/Account.cpp)
target_include_directories(banking PUBLIC
${CMAKE_CURRENT_SOURCE_DIR}/banking )

target_link_libraries(banking gcov)

if(BUILD_TESTS)
  enable_testing()
  add_subdirectory(third-party/gtest)
  file(GLOB BANKING_TEST_SOURCES tests/*.cpp)
  add_executable(check ${BANKING_TEST_SOURCES})
  target_link_libraries(check banking gtest_main)
  add_test(NAME check COMMAND check)
endif()