github.com/stafiprotocol/go-substrate-rpc-client@v1.4.7/teste2e/state_subscribe_runtime_version_test.go (about)

     1  // Go Substrate RPC Client (GSRPC) provides APIs and types around Polkadot and any Substrate-based chain RPC calls
     2  //
     3  // Copyright 2020 Stafi Protocol
     4  //
     5  // Licensed under the Apache License, Version 2.0 (the "License");
     6  // you may not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing, software
    12  // distributed under the License is distributed on an "AS IS" BASIS,
    13  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  // See the License for the specific language governing permissions and
    15  // limitations under the License.
    16  
    17  package teste2e
    18  
    19  import (
    20  	"fmt"
    21  	"testing"
    22  	"time"
    23  
    24  	"github.com/stafiprotocol/go-substrate-rpc-client/config"
    25  	"github.com/stafiprotocol/go-substrate-rpc-client/rpc"
    26  	"github.com/stretchr/testify/assert"
    27  )
    28  
    29  func TestState_SubscribeRuntimeVersion(t *testing.T) {
    30  	if testing.Short() {
    31  		t.Skip("skipping end-to-end test in short mode.")
    32  	}
    33  
    34  	rpcs, err := rpc.NewRPCS(config.Default().RPCURL)
    35  	if err != nil {
    36  		panic(err)
    37  	}
    38  
    39  	sub, err := rpcs.State.SubscribeRuntimeVersion()
    40  	if err != nil {
    41  		panic(err)
    42  	}
    43  	defer sub.Unsubscribe()
    44  
    45  	timeout := time.After(10 * time.Second)
    46  
    47  	for {
    48  		select {
    49  		case rv := <-sub.Chan():
    50  			fmt.Printf("%#v\n", rv)
    51  			return
    52  		case <-timeout:
    53  			assert.FailNow(t, "timeout reached without getting a notification from subscription")
    54  			return
    55  		}
    56  	}
    57  }