public void WriteLockCallsUnderlyingAPI(Fake <IAdvApi32> advApi32, int serviceControlManagerHandlerValue,
                                                int serviceDatabaseLockHandleValue)
        {
            advApi32.CallsTo(_ => _.AquireServiceDatabaseLock(A <IntPtr> ._))
            .Returns(new IntPtr(serviceDatabaseLockHandleValue));

            var sut = new ServiceDatabaseConnection(advApi32.FakedObject);

            var connectionHandle = new ConnectionHandle {
                ServiceManagerHandle = new IntPtr(serviceControlManagerHandlerValue)
            };

            sut.WriteLock(connectionHandle);

            advApi32.CallsTo(_ => _.AquireServiceDatabaseLock(A <IntPtr> ._)).MustHaveHappened();
        }
        public void WriteLockSetsServiceDatabaseLockHandle(Fake <IAdvApi32> advApi32, int serviceControlManagerHandlerValue,
                                                           int serviceDatabaseLockHandleValue)
        {
            advApi32.CallsTo(_ => _.AquireServiceDatabaseLock(A <IntPtr> ._))
            .Returns(new IntPtr(serviceDatabaseLockHandleValue));

            var sut = new ServiceDatabaseConnection(advApi32.FakedObject);

            var connectionHandle = new ConnectionHandle {
                ServiceManagerHandle = new IntPtr(serviceControlManagerHandlerValue)
            };

            sut.WriteLock(connectionHandle);

            var actual   = connectionHandle.ServiceDatabaseLockHandle;
            var expected = new IntPtr(serviceDatabaseLockHandleValue);

            Assert.Equal(expected, actual);
        }
        public void AquireWriteLockRequiresConnectionHandle(Fake <IAdvApi32> advApi32)
        {
            var sut = new ServiceDatabaseConnection(advApi32.FakedObject);

            Assert.Throws <ArgumentNullException>(() => sut.WriteLock(null));
        }