github.com/llimllib/devd@v0.0.0-20230426145215-4d29fc25f909/watch_test.go (about)

     1  package devd
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  	"sync"
     7  	"testing"
     8  	"time"
     9  
    10  	"github.com/cortesi/moddwatch"
    11  	"github.com/cortesi/termlog"
    12  )
    13  
    14  func addTempFile(t *testing.T, tmpFolder string, fname string, content string) {
    15  	if err := os.WriteFile(tmpFolder+"/"+fname, []byte(content), 0644); err != nil {
    16  		t.Error(err)
    17  	}
    18  }
    19  
    20  func TestRouteWatch(t *testing.T) {
    21  	logger := termlog.NewLog()
    22  	logger.Quiet()
    23  
    24  	tmpFolder, err := os.MkdirTemp("", "")
    25  	if err != nil {
    26  		t.Error(err)
    27  	}
    28  	defer os.RemoveAll(tmpFolder)
    29  
    30  	// Ensure that using . for the path works:
    31  	if err := os.Chdir(tmpFolder); err != nil {
    32  		t.Errorf("unable to change into %s", tmpFolder)
    33  	}
    34  	routes := make(RouteCollection)
    35  	if err := routes.Add(".", nil); err != nil {
    36  		t.Errorf("unable to add . route")
    37  	}
    38  
    39  	changedFiles := make(map[string]int)
    40  	ch := make(chan []string, 1024)
    41  
    42  	var exited sync.WaitGroup
    43  	exited.Add(1)
    44  	var lck sync.Mutex
    45  	go func() {
    46  		for {
    47  			data, more := <-ch
    48  			if more {
    49  				for i := range data {
    50  					lck.Lock()
    51  					fmt.Println(data)
    52  					if _, ok := changedFiles[data[i]]; !ok {
    53  						changedFiles[data[i]] = 1
    54  					}
    55  					lck.Unlock()
    56  				}
    57  			} else {
    58  				exited.Done()
    59  				return
    60  			}
    61  		}
    62  	}()
    63  	watchers := make([]*moddwatch.Watcher, len(routes))
    64  	i := 0
    65  	for r := range routes {
    66  		watcher, err := routes[r].Watch(ch, nil, logger)
    67  		watchers[i] = watcher
    68  		if err != nil {
    69  			t.Error(err)
    70  		}
    71  		i++
    72  	}
    73  
    74  	addTempFile(t, tmpFolder, "a.txt", "foo\n")
    75  	addTempFile(t, tmpFolder, "c.txt", "bar\n")
    76  	addTempFile(t, tmpFolder, "another.file.txt", "bar\n")
    77  
    78  	for i := 0; i < 100; i++ {
    79  		lck.Lock()
    80  		if len(changedFiles) >= 3 {
    81  			lck.Unlock()
    82  			break
    83  		}
    84  		lck.Unlock()
    85  		time.Sleep(50 * time.Millisecond)
    86  	}
    87  
    88  	for _, v := range watchers {
    89  		v.Stop()
    90  	}
    91  	close(ch)
    92  
    93  	exited.Wait()
    94  
    95  	if len(changedFiles) != 3 {
    96  		t.Errorf("wanted 3 changed files, got %d", len(changedFiles))
    97  	}
    98  }