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package proto
import (
"bytes"
"io"
"testing"
"github.com/stretchr/testify/require"
"github.com/ClickHouse/ch-go/internal/gold"
)
func TestColNothing(t *testing.T) {
t.Parallel()
const rows = 50
data := new(ColNothing).Nullable()
for i := 0; i < rows; i++ {
if i%2 == 0 {
data.Append(NewNullable(Nothing{}))
} else {
data.Append(Null[Nothing]())
}
_ = data.Row(i)
}
var buf Buffer
data.EncodeColumn(&buf)
t.Run("Golden", func(t *testing.T) {
t.Parallel()
gold.Bytes(t, buf.Buf, "col_nothing_nullable")
})
t.Run("Ok", func(t *testing.T) {
br := bytes.NewReader(buf.Buf)
r := NewReader(br)
dec := new(ColNothing).Nullable()
require.NoError(t, dec.DecodeColumn(r, rows))
require.Equal(t, data, dec)
require.Equal(t, rows, dec.Rows())
dec.Reset()
require.Equal(t, 0, dec.Rows())
require.Equal(t, ColumnType("Nullable(Nothing)"), dec.Type())
})
t.Run("ZeroRows", func(t *testing.T) {
r := NewReader(bytes.NewReader(nil))
var dec ColNothing
require.NoError(t, dec.DecodeColumn(r, 0))
})
t.Run("EOF", func(t *testing.T) {
r := NewReader(bytes.NewReader(nil))
dec := new(ColNothing).Nullable()
require.ErrorIs(t, dec.DecodeColumn(r, rows), io.EOF)
})
t.Run("NoShortRead", func(t *testing.T) {
dec := new(ColNothing).Nullable()
requireNoShortRead(t, buf.Buf, colAware(dec, rows))
})
t.Run("ZeroRowsEncode", func(t *testing.T) {
var v ColNothing
v.EncodeColumn(nil) // should be no-op
})
}
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