github.com/Ilhicas/nomad@v1.0.4-0.20210304152020-e86851182bc3/nomad/stream/ndjson_test.go (about)

     1  package stream
     2  
     3  import (
     4  	"bytes"
     5  	"context"
     6  	"testing"
     7  	"time"
     8  
     9  	"github.com/stretchr/testify/require"
    10  )
    11  
    12  type testObj struct {
    13  	Name string `json:"name"`
    14  }
    15  
    16  func TestJsonStream(t *testing.T) {
    17  	t.Parallel()
    18  
    19  	ctx, cancel := context.WithCancel(context.Background())
    20  	defer cancel()
    21  
    22  	s := NewJsonStream(ctx, 1*time.Second)
    23  	out := s.OutCh()
    24  
    25  	require.NoError(t, s.Send(testObj{Name: "test"}))
    26  
    27  	out1 := <-out
    28  
    29  	var expected bytes.Buffer
    30  	expected.Write([]byte(`{"name":"test"}`))
    31  
    32  	require.Equal(t, expected.Bytes(), out1.Data)
    33  	select {
    34  	case msg := <-out:
    35  		require.Failf(t, "Did not expect another message", "%#v", msg)
    36  	case <-time.After(100 * time.Millisecond):
    37  	}
    38  
    39  	require.NoError(t, s.Send(testObj{Name: "test2"}))
    40  
    41  	out2 := <-out
    42  	expected.Reset()
    43  
    44  	expected.Write([]byte(`{"name":"test2"}`))
    45  	require.Equal(t, expected.Bytes(), out2.Data)
    46  
    47  }
    48  
    49  func TestJson_Send_After_Stop(t *testing.T) {
    50  	t.Parallel()
    51  
    52  	ctx, cancel := context.WithCancel(context.Background())
    53  	defer cancel()
    54  
    55  	s := NewJsonStream(ctx, 1*time.Second)
    56  
    57  	// stop the stream
    58  	cancel()
    59  
    60  	time.Sleep(10 * time.Millisecond)
    61  	require.Error(t, s.Send(testObj{}))
    62  }
    63  
    64  func TestJson_HeartBeat(t *testing.T) {
    65  	t.Parallel()
    66  
    67  	ctx, cancel := context.WithCancel(context.Background())
    68  	defer cancel()
    69  
    70  	s := NewJsonStream(ctx, 10*time.Millisecond)
    71  
    72  	out := s.OutCh()
    73  	heartbeat := <-out
    74  
    75  	require.Equal(t, JsonHeartbeat, heartbeat)
    76  }