func TestRunClosedInput(t *testing.T) {
done := make(chan struct{})
in := make(chan redgreen.RunSpec)
out := redgreen.Run(done, in)
// Signal that there will be no more input.
close(in)
// Ensure that out is eventually closed.
mustBeClosedTimeout(out, time.Second, t)
}
func TestRunDoneBlockedOnOut(t *testing.T) {
var outWasOpen, outWasClosed bool
test := func() {
done := make(chan struct{})
in := make(chan redgreen.RunSpec)
out := redgreen.Run(done, in)
// Send a single command but don't receive from out, so that
// Run's goroutine will be blocked on sending to out.
in <- redgreen.RunSpec{Command: []string{"true"}}
// Signal that we are done.
close(done)
// Ensure that out is eventually closed.
timeout := time.Second
select {
case _, isOpen := <-out:
// Since we receive from out here, we can observe that
// the receive operation either succeed or not with
// equal probability.
if isOpen {
outWasOpen = true
} else {
outWasClosed = true
}
case <-time.After(timeout):
t.Fatalf("receive from channel timed out")
}
mustBeClosedTimeout(out, timeout, t)
}
var runs int
for !(outWasOpen && outWasClosed) {
// 2 or 3 runs should be enough. The probability of needing more
// than 16 runs to observe both outWasOpen and outWasClosed is
// (1/2)^16 ≈ 0.001
if runs > 16 {
t.Fatalf("failed to observe both conditions: outWasOpen=%v, outWasClosed=%v", outWasOpen, outWasClosed)
}
test()
runs++
}
t.Logf("#runs: %d", runs)
}
func TestRunDoneBlockedOnIn(t *testing.T) {
done := make(chan struct{})
in := make(chan redgreen.RunSpec)
out := redgreen.Run(done, in)
// Test the execution of a single command.
in <- redgreen.RunSpec{Command: []string{"true"}}
if res := <-out; res.Error != nil {
t.Fatalf("got %#v, want nil", res.Error)
}
// There is no more input, Run's goroutine should be blocked on
// receiving from in.
// Signal that we are done.
close(done)
// Ensure that out is eventually closed.
mustBeClosedTimeout(out, time.Second, t)
}
func do() error {
// Initialize and defer termination of termbox.
if !debug {
if err := termbox.Init(); err != nil {
return err
}
defer termbox.Close()
termbox.HideCursor()
termbox.SetOutputMode(termbox.Output256)
}
// wg waits for all goroutines started by this function to return.
var wg sync.WaitGroup
defer wg.Wait()
// Closing done signals all goroutines to terminate.
done := make(chan struct{})
defer close(done)
w, err := redgreen.Watch(done, ".", 200*time.Millisecond)
if err != nil {
return err
}
runSpec := redgreen.RunSpec{Command: testCommand, Timeout: timeout}
run := make(chan redgreen.RunSpec, 1)
res := redgreen.Run(done, run)
// Trigger an initial run of the test command.
run <- runSpec
// Run tests every time a file is created/removed/modified.
wg.Add(1)
go func() {
defer wg.Done()
for range w {
run <- runSpec
}
}()
state := make(chan redgreen.State)
wg.Add(1)
go func() {
defer wg.Done()
redgreen.Render(done, state)
}()
s := redgreen.State{Debug: debug}
var mu sync.RWMutex // synchronizes access to s.
// Render initial state.
state <- s
// Render after every test command result.
wg.Add(1)
go func() {
defer wg.Done()
for r := range res {
mu.Lock()
s.Results = append(s.Results, r)
mu.Unlock()
mu.RLock()
state <- s
mu.RUnlock()
}
}()
if debug {
// Wait for Ctrl-C.
ch := make(chan os.Signal, 1)
signal.Notify(ch, os.Interrupt)
<-ch
} else {
// Block until Esc is pressed.
for {
e := termbox.PollEvent()
if e.Type == termbox.EventKey && e.Key == termbox.KeyEsc {
break
}
if e.Type == termbox.EventResize {
mu.RLock()
state <- s
mu.RUnlock()
}
}
}
return nil
}