github.com/zoomfoo/nomad@v0.8.5-0.20180907175415-f28fd3a1a056/nomad/stats_fetcher_test.go (about)

     1  package nomad
     2  
     3  import (
     4  	"context"
     5  	"testing"
     6  	"time"
     7  
     8  	"github.com/hashicorp/nomad/testutil"
     9  )
    10  
    11  func TestStatsFetcher(t *testing.T) {
    12  	t.Parallel()
    13  
    14  	conf := func(c *Config) {
    15  		c.Region = "region-a"
    16  		c.DevDisableBootstrap = true
    17  		c.BootstrapExpect = 3
    18  	}
    19  
    20  	s1 := TestServer(t, conf)
    21  	defer s1.Shutdown()
    22  
    23  	s2 := TestServer(t, conf)
    24  	defer s2.Shutdown()
    25  
    26  	s3 := TestServer(t, conf)
    27  	defer s3.Shutdown()
    28  
    29  	TestJoin(t, s1, s2, s3)
    30  	testutil.WaitForLeader(t, s1.RPC)
    31  
    32  	members := s1.serf.Members()
    33  	if len(members) != 3 {
    34  		t.Fatalf("bad len: %d", len(members))
    35  	}
    36  
    37  	var servers []*serverParts
    38  	for _, member := range members {
    39  		ok, server := isNomadServer(member)
    40  		if !ok {
    41  			t.Fatalf("bad: %#v", member)
    42  		}
    43  		servers = append(servers, server)
    44  	}
    45  
    46  	// Do a normal fetch and make sure we get three responses.
    47  	func() {
    48  		ctx, cancel := context.WithTimeout(context.Background(), time.Second)
    49  		defer cancel()
    50  		stats := s1.statsFetcher.Fetch(ctx, s1.Members())
    51  		if len(stats) != 3 {
    52  			t.Fatalf("bad: %#v", stats)
    53  		}
    54  		for id, stat := range stats {
    55  			switch id {
    56  			case s1.config.NodeID, s2.config.NodeID, s3.config.NodeID:
    57  				// OK
    58  			default:
    59  				t.Fatalf("bad: %s", id)
    60  			}
    61  
    62  			if stat == nil || stat.LastTerm == 0 {
    63  				t.Fatalf("bad: %#v", stat)
    64  			}
    65  		}
    66  	}()
    67  
    68  	// Fake an in-flight request to server 3 and make sure we don't fetch
    69  	// from it.
    70  	func() {
    71  		s1.statsFetcher.inflight[string(s3.config.NodeID)] = struct{}{}
    72  		defer delete(s1.statsFetcher.inflight, string(s3.config.NodeID))
    73  
    74  		ctx, cancel := context.WithTimeout(context.Background(), time.Second)
    75  		defer cancel()
    76  		stats := s1.statsFetcher.Fetch(ctx, s1.Members())
    77  		if len(stats) != 2 {
    78  			t.Fatalf("bad: %#v", stats)
    79  		}
    80  		for id, stat := range stats {
    81  			switch id {
    82  			case s1.config.NodeID, s2.config.NodeID:
    83  				// OK
    84  			case s3.config.NodeID:
    85  				t.Fatalf("bad")
    86  			default:
    87  				t.Fatalf("bad: %s", id)
    88  			}
    89  
    90  			if stat == nil || stat.LastTerm == 0 {
    91  				t.Fatalf("bad: %#v", stat)
    92  			}
    93  		}
    94  	}()
    95  }