gistfile1.txt

        const joule = await createJoule();
        const contract100k = await Contract100kGas.new();

        const price = await joule.getPrice(gasLimit1, gasPrice1);
        await joule.register(contract100k.address, nowPlus3minutes, gasLimit1, gasPrice1, {value: price});
        await joule.unregister(0, contract100k.address, nowPlus3minutes, gasLimit1, gasPrice1);

        let count = await joule.getCount();
        count.should.be.bignumber.equals(1, "contract must be registered");

        await increaseTime(3 * MINUTE);

        const top = await joule.getTopOnce();
        const invokeGas = top[4];

        // console.info(invokeGas);

        const tx = await joule.invoke({gas: invokeGas.add(20000)});
        console.info(tx);
        count = await joule.getCount();
        count.should.be.bignumber.equals(0, "contract100 must be invoked!");