github.com/blixtra/nomad@v0.7.2-0.20171221000451-da9a1d7bb050/nomad/plan_queue_test.go (about)

     1  package nomad
     2  
     3  import (
     4  	"testing"
     5  	"time"
     6  
     7  	"github.com/hashicorp/nomad/nomad/mock"
     8  	"github.com/hashicorp/nomad/nomad/structs"
     9  )
    10  
    11  func testPlanQueue(t *testing.T) *PlanQueue {
    12  	pq, err := NewPlanQueue()
    13  	if err != nil {
    14  		t.Fatalf("err: %v", err)
    15  	}
    16  	return pq
    17  }
    18  
    19  func TestPlanQueue_Enqueue_Dequeue(t *testing.T) {
    20  	t.Parallel()
    21  	pq := testPlanQueue(t)
    22  	if pq.Enabled() {
    23  		t.Fatalf("should not be enabled")
    24  	}
    25  	pq.SetEnabled(true)
    26  	if !pq.Enabled() {
    27  		t.Fatalf("should be enabled")
    28  	}
    29  
    30  	plan := mock.Plan()
    31  	future, err := pq.Enqueue(plan)
    32  	if err != nil {
    33  		t.Fatalf("err: %v", err)
    34  	}
    35  
    36  	stats := pq.Stats()
    37  	if stats.Depth != 1 {
    38  		t.Fatalf("bad: %#v", stats)
    39  	}
    40  
    41  	resCh := make(chan *structs.PlanResult, 1)
    42  	go func() {
    43  		res, err := future.Wait()
    44  		if err != nil {
    45  			t.Fatalf("err: %v", err)
    46  		}
    47  		resCh <- res
    48  	}()
    49  
    50  	pending, err := pq.Dequeue(time.Second)
    51  	if err != nil {
    52  		t.Fatalf("err: %v", err)
    53  	}
    54  
    55  	stats = pq.Stats()
    56  	if stats.Depth != 0 {
    57  		t.Fatalf("bad: %#v", stats)
    58  	}
    59  
    60  	if pending == nil || pending.plan != plan {
    61  		t.Fatalf("bad: %#v", pending)
    62  	}
    63  
    64  	result := mock.PlanResult()
    65  	pending.respond(result, nil)
    66  
    67  	select {
    68  	case r := <-resCh:
    69  		if r != result {
    70  			t.Fatalf("Bad: %#v", r)
    71  		}
    72  	case <-time.After(time.Second):
    73  		t.Fatalf("timeout")
    74  	}
    75  }
    76  
    77  func TestPlanQueue_Enqueue_Disable(t *testing.T) {
    78  	t.Parallel()
    79  	pq := testPlanQueue(t)
    80  
    81  	// Enqueue
    82  	plan := mock.Plan()
    83  	pq.SetEnabled(true)
    84  	future, err := pq.Enqueue(plan)
    85  	if err != nil {
    86  		t.Fatalf("err: %v", err)
    87  	}
    88  
    89  	// Flush via SetEnabled
    90  	pq.SetEnabled(false)
    91  
    92  	// Check the stats
    93  	stats := pq.Stats()
    94  	if stats.Depth != 0 {
    95  		t.Fatalf("bad: %#v", stats)
    96  	}
    97  
    98  	// Future should be canceled
    99  	res, err := future.Wait()
   100  	if err != planQueueFlushed {
   101  		t.Fatalf("err: %v", err)
   102  	}
   103  	if res != nil {
   104  		t.Fatalf("bad: %#v", res)
   105  	}
   106  }
   107  
   108  func TestPlanQueue_Dequeue_Timeout(t *testing.T) {
   109  	t.Parallel()
   110  	pq := testPlanQueue(t)
   111  	pq.SetEnabled(true)
   112  
   113  	start := time.Now()
   114  	out, err := pq.Dequeue(5 * time.Millisecond)
   115  	end := time.Now()
   116  
   117  	if err != nil {
   118  		t.Fatalf("err: %v", err)
   119  	}
   120  	if out != nil {
   121  		t.Fatalf("unexpected: %#v", out)
   122  	}
   123  
   124  	if diff := end.Sub(start); diff < 5*time.Millisecond {
   125  		t.Fatalf("bad: %#v", diff)
   126  	}
   127  }
   128  
   129  // Ensure higher priority dequeued first
   130  func TestPlanQueue_Dequeue_Priority(t *testing.T) {
   131  	t.Parallel()
   132  	pq := testPlanQueue(t)
   133  	pq.SetEnabled(true)
   134  
   135  	plan1 := mock.Plan()
   136  	plan1.Priority = 10
   137  	pq.Enqueue(plan1)
   138  
   139  	plan2 := mock.Plan()
   140  	plan2.Priority = 30
   141  	pq.Enqueue(plan2)
   142  
   143  	plan3 := mock.Plan()
   144  	plan3.Priority = 20
   145  	pq.Enqueue(plan3)
   146  
   147  	out1, _ := pq.Dequeue(time.Second)
   148  	if out1.plan != plan2 {
   149  		t.Fatalf("bad: %#v", out1)
   150  	}
   151  
   152  	out2, _ := pq.Dequeue(time.Second)
   153  	if out2.plan != plan3 {
   154  		t.Fatalf("bad: %#v", out2)
   155  	}
   156  
   157  	out3, _ := pq.Dequeue(time.Second)
   158  	if out3.plan != plan1 {
   159  		t.Fatalf("bad: %#v", out3)
   160  	}
   161  }
   162  
   163  // Ensure FIFO at fixed priority
   164  func TestPlanQueue_Dequeue_FIFO(t *testing.T) {
   165  	t.Parallel()
   166  	pq := testPlanQueue(t)
   167  	pq.SetEnabled(true)
   168  
   169  	plans := make([]*structs.Plan, 100)
   170  	for i := 0; i < len(plans); i++ {
   171  		if i%5 == 0 {
   172  			time.Sleep(10 * time.Millisecond)
   173  		}
   174  		plans[i] = mock.Plan()
   175  		pq.Enqueue(plans[i])
   176  	}
   177  
   178  	var prev *pendingPlan
   179  	for i := range plans {
   180  		out, err := pq.Dequeue(time.Second)
   181  		if err != nil {
   182  			t.Fatalf("failed to dequeue plan %d: %v", i, err)
   183  		}
   184  		if prev != nil && out.enqueueTime.Before(prev.enqueueTime) {
   185  			t.Fatalf("out of order dequeue at %d, prev=%v, got=%v", i, prev.enqueueTime, out.enqueueTime)
   186  		}
   187  		prev = out
   188  	}
   189  }