Function TestRWCacheUpdate

vfs/read_write_test.go:721–761

Test the cache reading a file that is updated externally See: https://github.com/rclone/rclone/issues/6053

(t *testing.T)

//
// See: https://github.com/rclone/rclone/issues/6053
func TestRWCacheUpdate(t *testing.T) {
	opt := vfscommon.Opt
	opt.CacheMode = vfscommon.CacheModeFull
	opt.WriteBack = writeBackDelay
	opt.DirCacheTime = fs.Duration(100 * time.Millisecond)
	opt.HandleCaching = 0
	r, vfs := newTestVFSOpt(t, &opt)

	if r.Fremote.Precision() == fs.ModTimeNotSupported {
		t.Skip("skip as modtime not supported")
	}

	const filename = "TestRWCacheUpdate"

	modTime := time.Now().Add(-time.Hour)
	for i := range 10 {
		modTime = modTime.Add(time.Minute)
		// Refresh test file
		contents := fmt.Sprintf("TestRWCacheUpdate%03d", i)
		// Increase the size for second half of test
		for j := 5; j < i; j++ {
			contents += "*"
		}
		file1 := r.WriteObject(context.Background(), filename, contents, modTime)
		r.CheckRemoteItems(t, file1)

		// Wait for directory cache to expire
		time.Sleep(time.Duration(2 * opt.DirCacheTime))

		// Check the file is OK via the VFS
		data, err := vfs.ReadFile(filename)
		require.NoError(t, err)
		require.Equal(t, contents, string(data))

		// Check Stat
		fi, err := vfs.Stat(filename)
		require.NoError(t, err)
		assert.Equal(t, int64(len(contents)), fi.Size())
		fstest.AssertTimeEqualWithPrecision(t, filename, modTime, fi.ModTime(), r.Fremote.Precision())
	}
}