open-nomad/helper/raftutil/sample_test.go

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package raftutil
import (
"testing"
"github.com/hashicorp/nomad/helper/uuid"
"github.com/hashicorp/nomad/nomad/structs"
"github.com/hashicorp/nomad/scheduler"
"github.com/kr/pretty"
"github.com/stretchr/testify/require"
)
// TestSampleInvariant illustrates how to find offending log entry for an invariant
func TestSampleInvariant(t *testing.T) {
t.Skip("not a real test")
path := "/tmp/nomad-datadir/server/raft"
ns := "default"
parentID := "myjob"
fsm, err := NewFSM(path)
require.NoError(t, err)
state := fsm.State()
for {
idx, _, err := fsm.ApplyNext()
if err == ErrNoMoreLogs {
break
}
require.NoError(t, err)
// Test invariant for each entry
// For example, test job summary numbers against running jobs
summary, err := state.JobSummaryByID(nil, ns, parentID)
require.NoError(t, err)
if summary == nil {
// job hasn't been created yet
continue
}
summaryCount := summary.Children.Running + summary.Children.Pending + summary.Children.Dead
jobCountByParent := 0
iter, err := state.Jobs(nil)
require.NoError(t, err)
for {
rawJob := iter.Next()
if rawJob == nil {
break
}
job := rawJob.(*structs.Job)
if job.Namespace == ns && job.ParentID == parentID {
jobCountByParent++
}
}
require.Equalf(t, summaryCount, jobCountByParent, "job summary at idx=%v", idx)
}
// any post-assertion follow
}
// TestSchedulerLogic illustrates how to test how to test the scheduler
// logic for handling an eval
func TestSchedulerLogic(t *testing.T) {
t.Skip("not a real test")
path := "/tmp/nomad-datadir/server/raft"
ns := "default"
jobID := "myjob"
testIdx := uint64(3234)
fsm, err := NewFSM(path)
require.NoError(t, err)
_, _, err = fsm.ApplyUntil(testIdx)
require.NoError(t, err)
state := fsm.State()
job, err := state.JobByID(nil, ns, jobID)
require.NoError(t, err)
// Create an eval and schedule it!
// Create a mock evaluation to register the job
eval := &structs.Evaluation{
Namespace: ns,
ID: uuid.Generate(),
Priority: job.Priority,
TriggeredBy: structs.EvalTriggerJobRegister,
JobID: job.ID,
Status: structs.EvalStatusPending,
}
// Process the evaluation
h := scheduler.NewHarnessWithState(t, state)
err = h.Process(scheduler.NewServiceScheduler, eval)
require.NoError(t, err)
require.Len(t, h.Plans, 1)
pretty.Println(h.Plans[0])
}