You can test our service by using testnet bitcoins. The testnet is an alternative Bitcoin block chain, to be used for testing. Testnet coins are separate and distinct from actual bitcoins, and are never supposed to have any value. This allows application developers or Bitcoin testers to experiment, without having to use real bitcoins.
First, you should download a testnet Bitcoin wallet (for android) here: https://play.google.com/store/apps/details?id=de.schildbach.wallet_test&hl=en
Then, you should get some testnet coins by visiting this website https://testnet.coinfaucet.eu/en/ and entering your testnet address (generated in the testnet Bitcoin wallet mentioned above). After receiving the testnet coins, you have to wait for 1 confirmation to be able to spend them (this may take up to 20 minutes).
Visit https://coingate.com/example-shops to test how to pay using Bitcoin (do not forget, that testnet coins shoud be used for testing, not real bitcoins).
Visit https://sandbox.coingate.com , click "Register" and finish the register form. When logged in, you can use the sandbox environment to test our services, from API access, to generating POS (Point of Sale) apps, payment buttons, and everything else (do not forget, that testnet coins shoud be used for testing, not real bitcoins).