gitlab.com/aquachain/aquachain@v1.17.16-rc3.0.20221018032414-e3ddf1e1c055/common/metrics/json_test.go (about)

     1  // Copyright 2018 The aquachain Authors
     2  // This file is part of the aquachain library.
     3  //
     4  // The aquachain library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The aquachain library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the aquachain library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package metrics
    18  
    19  import (
    20  	"bytes"
    21  	"encoding/json"
    22  	"testing"
    23  )
    24  
    25  func TestRegistryMarshallJSON(t *testing.T) {
    26  	b := &bytes.Buffer{}
    27  	enc := json.NewEncoder(b)
    28  	r := NewRegistry()
    29  	r.Register("counter", NewCounter())
    30  	enc.Encode(r)
    31  	if s := b.String(); "{\"counter\":{\"count\":0}}\n" != s {
    32  		t.Fatalf(s)
    33  	}
    34  }
    35  
    36  func TestRegistryWriteJSONOnce(t *testing.T) {
    37  	r := NewRegistry()
    38  	r.Register("counter", NewCounter())
    39  	b := &bytes.Buffer{}
    40  	WriteJSONOnce(r, b)
    41  	if s := b.String(); s != "{\"counter\":{\"count\":0}}\n" {
    42  		t.Fail()
    43  	}
    44  }