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Copy pathapp_watch_test.go
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app_watch_test.go
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package xun
import (
"errors"
"io"
"io/fs"
"net/http"
"net/http/httptest"
"os"
"testing"
"testing/fstest"
"time"
"github.com/stretchr/testify/require"
"github.com/yaitoo/xun/fsnotify"
)
func TestWatchOnStatic(t *testing.T) {
fsys := fstest.MapFS{
"public/home.html": {Data: []byte("home"), Mode: os.ModePerm, ModTime: time.Now()},
"public/admin.html": {Data: []byte("admin"), Mode: os.ModePerm, ModTime: time.Now()},
}
mux := http.NewServeMux()
srv := httptest.NewServer(mux)
defer srv.Close()
app := New(WithMux(mux), WithFsys(fsys), WithWatch(), WithViewEngines(&StaticViewEngine{}))
app.Start()
defer app.Close()
req, err := http.NewRequest("GET", srv.URL+"/", nil)
require.NoError(t, err)
resp, err := client.Do(req)
require.NoError(t, err)
require.Equal(t, http.StatusNotFound, resp.StatusCode)
resp.Body.Close()
req, err = http.NewRequest("GET", srv.URL+"/home.html", nil)
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err := io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "home", string(buf))
req, err = http.NewRequest("GET", srv.URL+"/admin.html", nil)
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err = io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "admin", string(buf))
// fixed data race issue on fstest.MapFile
app.watcher.Stop()
fsys["public/index.html"] = &fstest.MapFile{Data: []byte("index added"), ModTime: time.Now()}
fsys["public/home.html"] = &fstest.MapFile{Data: []byte("home updated"), ModTime: time.Now()}
delete(fsys, "public/admin.html")
checkInterval := fsnotify.CheckInterval
defer func() {
fsnotify.CheckInterval = checkInterval
}()
fsnotify.CheckInterval = 100 * time.Millisecond
go app.watcher.Start()
time.Sleep(1 * time.Second)
req, err = http.NewRequest("GET", srv.URL+"/", nil)
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err = io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "index added", string(buf))
req, err = http.NewRequest("GET", srv.URL+"/home.html", nil)
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err = io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "home updated", string(buf))
req, err = http.NewRequest("GET", srv.URL+"/admin.html", nil)
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
require.Equal(t, http.StatusNotFound, resp.StatusCode)
resp.Body.Close()
}
func TestWatchOnHtml(t *testing.T) {
fsys := fstest.MapFS{
"components/header.html": {Data: []byte("<title>header</title>"), ModTime: time.Now()},
"layouts/home.html": {Data: []byte(`<html><head>{{ block "components/header" . }} {{end}}</head><body>{{ block "content" . }} {{end}}</body></html>`), ModTime: time.Now()},
"views/shared.html": {Data: []byte("<!--layout:home-->{{ define \"content\"}}<div>shared</div>{{ end }}"), ModTime: time.Now()},
"pages/index.html": {Data: []byte("<!--layout:home-->{{ define \"content\"}}<div>index</div>{{ end }}"), ModTime: time.Now()},
"pages/admin/index.html": {Data: []byte("<!--layout:home-->{{ define \"content\"}}<div>admin/index</div>{{ end }}"), ModTime: time.Now()},
"pages/admin/user.html": {Data: []byte("<!--layout:home-->{{ define \"content\"}}<div>admin/user</div>{{ end }}"), ModTime: time.Now()},
}
mux := http.NewServeMux()
srv := httptest.NewServer(mux)
defer srv.Close()
app := New(WithMux(mux), WithFsys(fsys), WithWatch())
app.Get("/view", func(c *Context) error {
return c.View(nil, "views/shared")
})
app.Start()
defer app.Close()
req, err := http.NewRequest("GET", srv.URL+"/about", nil)
require.NoError(t, err)
resp, err := client.Do(req)
require.NoError(t, err)
require.Equal(t, http.StatusNotFound, resp.StatusCode)
resp.Body.Close()
req, err = http.NewRequest("GET", srv.URL+"/", nil)
req.Header.Set("Accept", "text/html")
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err := io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "<html><head><title>header</title></head><body><div>index</div></body></html>", string(buf))
req, err = http.NewRequest("GET", srv.URL+"/admin/", nil)
req.Header.Set("Accept", "text/html")
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err = io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "<html><head><title>header</title></head><body><div>admin/index</div></body></html>", string(buf))
req, err = http.NewRequest("GET", srv.URL+"/admin/user", nil)
req.Header.Set("Accept", "text/html")
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err = io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "<html><head><title>header</title></head><body><div>admin/user</div></body></html>", string(buf))
req, err = http.NewRequest("GET", srv.URL+"/view", nil)
req.Header.Set("Accept", "text/html")
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err = io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "<html><head><title>header</title></head><body><div>shared</div></body></html>", string(buf))
// fixed data race issue on fstest.MapFile
app.watcher.Stop()
fsys["components/header.html"].Data = []byte("<title>header updated</title>")
fsys["components/header.html"].ModTime = time.Now()
fsys["layouts/home.html"].Data = []byte(`<html><head>{{ block "components/header" . }} {{end}}</head><body>layout updated:{{ block "content" . }} {{end}}</body></html>`)
fsys["layouts/home.html"].ModTime = time.Now()
fsys["views/shared.html"].Data = []byte("<!--layout:home-->{{ define \"content\"}}<div>shared updated</div>{{ end }}")
fsys["views/shared.html"].ModTime = time.Now()
fsys["pages/index.html"].Data = []byte("<!--layout:home-->{{ define \"content\"}}<div>index updated</div>{{ end }}")
fsys["pages/index.html"].ModTime = time.Now()
fsys["pages/admin/index.html"].Data = []byte("<!--layout:home-->{{ define \"content\"}}<div>admin/index updated</div>{{ end }}")
fsys["pages/admin/index.html"].ModTime = time.Now()
// added
fsys["pages/about.html"] = &fstest.MapFile{Data: []byte("<!--layout:home-->{{ define \"content\"}}<div>about</div>{{ end }}"), ModTime: time.Now()}
// deleted
delete(fsys, "pages/admin/user.html")
checkInterval := fsnotify.CheckInterval
fsnotify.CheckInterval = 100 * time.Millisecond
defer func() {
fsnotify.CheckInterval = checkInterval
}()
go app.watcher.Start()
time.Sleep(1 * time.Second)
app.watcher.Stop()
req, err = http.NewRequest("GET", srv.URL+"/", nil)
req.Header.Set("Accept", "text/html")
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err = io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "<html><head><title>header updated</title></head><body>layout updated:<div>index updated</div></body></html>", string(buf))
req, err = http.NewRequest("GET", srv.URL+"/admin/", nil)
req.Header.Set("Accept", "text/html")
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err = io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "<html><head><title>header updated</title></head><body>layout updated:<div>admin/index updated</div></body></html>", string(buf))
req, err = http.NewRequest("GET", srv.URL+"/view", nil)
req.Header.Set("Accept", "text/html")
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err = io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "<html><head><title>header updated</title></head><body>layout updated:<div>shared updated</div></body></html>", string(buf))
// deleted event is not handled in html view engine, it is not updated, and does not return 404
req, err = http.NewRequest("GET", srv.URL+"/admin/user", nil)
req.Header.Set("Accept", "text/html")
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
buf, err = io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "<html><head><title>header</title></head><body><div>admin/user</div></body></html>", string(buf))
// added
req, err = http.NewRequest("GET", srv.URL+"/about", nil)
require.NoError(t, err)
resp, err = client.Do(req)
require.NoError(t, err)
buf, err = io.ReadAll(resp.Body)
require.NoError(t, err)
resp.Body.Close()
require.Equal(t, "<html><head><title>header updated</title></head><body>layout updated:<div>about</div></body></html>", string(buf))
}
type mockViewEngine struct {
}
func (*mockViewEngine) Load(fsys fs.FS, app *App) error { // skipcq: RVV-B0012
return nil
}
func (*mockViewEngine) FileChanged(fsys fs.FS, app *App, event fsnotify.Event) error { // skipcq: RVV-B0012
return errors.New("err: unhandled error")
}
func TestHotReloadChannels(t *testing.T) {
createApp := func(ve ...ViewEngine) *App {
fsys := fstest.MapFS{
"public/home.html": {Data: []byte("home"), Mode: os.ModePerm, ModTime: time.Now()},
}
mux := http.NewServeMux()
srv := httptest.NewServer(mux)
defer srv.Close()
opts := []Option{WithMux(mux), WithFsys(fsys), WithWatch()}
if ve != nil {
opts = append(opts, WithViewEngines(ve...))
}
app := New(opts...)
app.Start()
return app
}
tests := []struct {
name string
createApp func() *App
throwError func(app *App)
}{
{
name: "should_not_panic_when_watcher_events_channel_is_closed",
createApp: func() *App { return createApp() },
throwError: func(app *App) {
close(app.watcher.Events)
},
},
{
name: "should_not_panic_when_watcher_errors_channel_is_closed",
createApp: func() *App { return createApp() },
throwError: func(app *App) {
close(app.watcher.Errors)
},
},
{
name: "should_not_panic_when_watcher_failed_to_load_views",
createApp: func() *App { return createApp(&mockViewEngine{}) },
throwError: func(app *App) {
app.watcher.Events <- fsnotify.Event{Name: "public/home.html", Op: fsnotify.Write}
},
},
{
name: "should_work_when_watcher_catch_an_error",
createApp: func() *App { return createApp(&mockViewEngine{}) },
throwError: func(app *App) {
app.watcher.Errors <- errors.New("err: unhandled error")
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(*testing.T) {
app := tt.createApp()
defer app.Close()
tt.throwError(app)
})
}
}