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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package flyscrape_test
import (
"errors"
"os"
"testing"
"time"
"github.com/philippta/flyscrape"
"github.com/stretchr/testify/require"
)
func TestWatch(t *testing.T) {
f := tmpfile(t)
defer os.Remove(f.Name())
write(f, "test 1")
calls := 0
done := make(chan struct{})
go func() {
err := flyscrape.Watch(f.Name(), func(s string) error {
calls++
if calls == 1 {
require.Equal(t, "test 1", s)
return nil
}
if calls == 2 {
require.Equal(t, "test 2", s)
return flyscrape.StopWatch
}
return nil
})
require.NoError(t, err)
close(done)
}()
write(f, "test 2")
<-done
}
func TestWatchError(t *testing.T) {
f := tmpfile(t)
defer os.Remove(f.Name())
done := make(chan struct{})
go func() {
err := flyscrape.Watch(f.Name(), func(s string) error {
return errors.New("test")
})
require.Error(t, err)
close(done)
}()
write(f, "test 2")
<-done
}
func tmpfile(t *testing.T) *os.File {
f, err := os.CreateTemp("", "scrape.js")
require.NoError(t, err)
return f
}
func write(f *os.File, s string) {
time.Sleep(10 * time.Millisecond)
f.Seek(0, 0)
f.Truncate(0)
f.WriteString(s)
f.Sync()
}
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