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|
package multistep
import (
"os"
"reflect"
"testing"
"time"
)
func TestDebugRunner_Impl(t *testing.T) {
var raw interface{}
raw = &DebugRunner{}
if _, ok := raw.(Runner); !ok {
t.Fatal("DebugRunner must be a runner.")
}
}
func TestDebugRunner_Run(t *testing.T) {
data := new(BasicStateBag)
stepA := &TestStepAcc{Data: "a"}
stepB := &TestStepAcc{Data: "b"}
pauseFn := func(loc DebugLocation, name string, state StateBag) {
key := "data"
if loc == DebugLocationBeforeCleanup {
key = "cleanup"
}
if _, ok := state.GetOk(key); !ok {
state.Put(key, make([]string, 0, 5))
}
data := state.Get(key).([]string)
state.Put(key, append(data, name))
}
r := &DebugRunner{
Steps: []Step{stepA, stepB},
PauseFn: pauseFn,
}
r.Run(data)
// Test data
expected := []string{"a", "TestStepAcc", "b", "TestStepAcc"}
results := data.Get("data").([]string)
if !reflect.DeepEqual(results, expected) {
t.Errorf("unexpected results: %#v", results)
}
// Test cleanup
expected = []string{"TestStepAcc", "b", "TestStepAcc", "a"}
results = data.Get("cleanup").([]string)
if !reflect.DeepEqual(results, expected) {
t.Errorf("unexpected results: %#v", results)
}
}
// confirm that can't run twice
func TestDebugRunner_Run_Run(t *testing.T) {
defer func() {
recover()
}()
ch := make(chan chan bool)
stepInt := &TestStepSync{ch}
stepWait := &TestStepWaitForever{}
r := &DebugRunner{Steps: []Step{stepInt, stepWait}}
go r.Run(new(BasicStateBag))
// wait until really running
<-ch
// now try to run aain
r.Run(new(BasicStateBag))
// should not get here in nominal codepath
t.Errorf("Was able to run an already running DebugRunner")
}
func TestDebugRunner_Cancel(t *testing.T) {
ch := make(chan chan bool)
data := new(BasicStateBag)
stepA := &TestStepAcc{Data: "a"}
stepB := &TestStepAcc{Data: "b"}
stepInt := &TestStepSync{ch}
stepC := &TestStepAcc{Data: "c"}
r := &DebugRunner{}
r.Steps = []Step{stepA, stepB, stepInt, stepC}
// cancelling an idle Runner is a no-op
r.Cancel()
go r.Run(data)
// Wait until we reach the sync point
responseCh := <-ch
// Cancel then continue chain
cancelCh := make(chan bool)
go func() {
r.Cancel()
cancelCh <- true
}()
for {
if _, ok := data.GetOk(StateCancelled); ok {
responseCh <- true
break
}
time.Sleep(10 * time.Millisecond)
}
<-cancelCh
// Test run data
expected := []string{"a", "b"}
results := data.Get("data").([]string)
if !reflect.DeepEqual(results, expected) {
t.Errorf("unexpected result: %#v", results)
}
// Test cleanup data
expected = []string{"b", "a"}
results = data.Get("cleanup").([]string)
if !reflect.DeepEqual(results, expected) {
t.Errorf("unexpected result: %#v", results)
}
// Test that it says it is cancelled
cancelled := data.Get(StateCancelled).(bool)
if !cancelled {
t.Errorf("not cancelled")
}
}
func TestDebugPauseDefault(t *testing.T) {
// Create a pipe pair so that writes/reads are blocked until we do it
r, w, err := os.Pipe()
if err != nil {
t.Fatalf("err: %s", err)
}
// Set stdin so we can control it
oldStdin := os.Stdin
os.Stdin = r
defer func() { os.Stdin = oldStdin }()
// Start pausing
complete := make(chan bool, 1)
go func() {
dr := &DebugRunner{Steps: []Step{
&TestStepAcc{Data: "a"},
}}
dr.Run(new(BasicStateBag))
complete <- true
}()
select {
case <-complete:
t.Fatal("shouldn't have completed")
case <-time.After(100 * time.Millisecond):
}
w.Write([]byte("\n\n"))
select {
case <-complete:
case <-time.After(100 * time.Millisecond):
t.Fatal("didn't complete")
}
}
|
