Function testFileReadAt

vfs/write_test.go:344–377

(t *testing.T, n int)

}

func testFileReadAt(t *testing.T, n int) {
	_, vfs, fh := writeHandleCreate(t)

	contents := []byte(random.String(n))
	if n != 0 {
		written, err := fh.Write(contents)
		require.NoError(t, err)
		assert.Equal(t, n, written)
	}

	// Close the file without writing to it if n==0
	err := fh.Close()
	if errors.Is(err, fs.ErrorCantUploadEmptyFiles) {
		t.Logf("skipping test: %v", err)
		return
	}
	assert.NoError(t, err)

	// read the file back in using ReadAt into a buffer
	// this simulates what mount does
	rd, err := vfs.OpenFile("file1", os.O_RDONLY, 0)
	require.NoError(t, err)

	buf := make([]byte, 1024)
	read, err := rd.ReadAt(buf, 0)
	if err != io.EOF {
		assert.NoError(t, err)
	}
	assert.Equal(t, read, n)
	assert.Equal(t, contents, buf[:read])

	err = rd.Close()
	assert.NoError(t, err)
}

func TestFileReadAtZeroLength(t *testing.T) {
	testFileReadAt(t, 0)