Function TestFileOpenReadUnknownSize

vfs/file_test.go:183–229

(t *testing.T)

}

func TestFileOpenReadUnknownSize(t *testing.T) {
	var (
		contents = []byte("file contents")
		remote   = "file.txt"
		ctx      = context.Background()
	)

	// create a mock object which returns size -1
	o := mockobject.New(remote).WithContent(contents, mockobject.SeekModeNone)
	o.SetUnknownSize(true)
	assert.Equal(t, int64(-1), o.Size())

	// add it to a mock fs
	fMock, err := mockfs.NewFs(context.Background(), "test", "root", nil)
	require.NoError(t, err)
	f := fMock.(*mockfs.Fs)
	f.AddObject(o)
	testObj, err := f.NewObject(ctx, remote)
	require.NoError(t, err)
	assert.Equal(t, int64(-1), testObj.Size())

	// create a VFS from that mockfs
	vfs := New(context.Background(), f, nil)
	defer cleanupVFS(t, vfs)

	// find the file
	node, err := vfs.Stat(remote)
	require.NoError(t, err)
	require.True(t, node.IsFile())
	file := node.(*File)

	// open it
	fd, err := file.openRead()
	require.NoError(t, err)
	assert.Equal(t, int64(0), fd.Size())

	// check the contents are not empty even though size is empty
	gotContents, err := io.ReadAll(fd)
	require.NoError(t, err)
	assert.Equal(t, contents, gotContents)
	t.Logf("gotContents = %q", gotContents)

	// check that file size has been updated
	assert.Equal(t, int64(len(contents)), fd.Size())

	require.NoError(t, fd.Close())
}

func TestFileOpenWrite(t *testing.T) {
	_, vfs, file, _ := fileCreate(t, vfscommon.CacheModeOff)