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package proto
import (
"bytes"
"io"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/ClickHouse/ch-go/internal/gold"
)
func TestLowCardinalityOf(t *testing.T) {
v := NewLowCardinality[string](new(ColStr))
require.NoError(t, v.Prepare())
require.Equal(t, ColumnType("LowCardinality(String)"), v.Type())
}
func TestLowCardinalityOfStr(t *testing.T) {
col := (&ColStr{}).LowCardinality()
v := []string{"foo", "bar", "foo", "foo", "baz"}
col.AppendArr(v)
require.NoError(t, col.Prepare())
var buf Buffer
col.EncodeColumn(&buf)
t.Run("Golden", func(t *testing.T) {
gold.Bytes(t, buf.Buf, "col_low_cardinality_of_str")
})
t.Run("Ok", func(t *testing.T) {
br := bytes.NewReader(buf.Buf)
r := NewReader(br)
dec := (&ColStr{}).LowCardinality()
require.NoError(t, dec.DecodeColumn(r, col.Rows()))
require.Equal(t, col.Rows(), dec.Rows())
for i, s := range v {
assert.Equal(t, s, col.Row(i))
}
assert.Equal(t, ColumnType("LowCardinality(String)"), dec.Type())
})
t.Run("EOF", func(t *testing.T) {
r := NewReader(bytes.NewReader(nil))
dec := (&ColStr{}).LowCardinality()
require.ErrorIs(t, dec.DecodeColumn(r, col.Rows()), io.EOF)
})
t.Run("NoShortRead", func(t *testing.T) {
dec := (&ColStr{}).LowCardinality()
requireNoShortRead(t, buf.Buf, colAware(dec, col.Rows()))
})
}
func TestArrLowCardinalityStr(t *testing.T) {
// Array(LowCardinality(String))
data := [][]string{
{"foo", "bar", "baz"},
{"foo"},
{"bar", "bar"},
{"foo", "foo"},
{"bar", "bar", "bar", "bar"},
}
col := new(ColStr).LowCardinality().Array()
rows := len(data)
for _, v := range data {
col.Append(v)
}
require.NoError(t, col.Prepare())
var buf Buffer
col.EncodeColumn(&buf)
t.Run("Golden", func(t *testing.T) {
gold.Bytes(t, buf.Buf, "col_arr_low_cardinality_u8_str")
})
t.Run("Ok", func(t *testing.T) {
br := bytes.NewReader(buf.Buf)
r := NewReader(br)
dec := new(ColStr).LowCardinality().Array()
require.NoError(t, dec.DecodeColumn(r, rows))
requireEqual[[]string](t, col, dec)
dec.Reset()
require.Equal(t, 0, dec.Rows())
require.Equal(t, ColumnType("Array(LowCardinality(String))"), dec.Type())
})
t.Run("EOF", func(t *testing.T) {
r := NewReader(bytes.NewReader(nil))
dec := new(ColStr).LowCardinality().Array()
require.ErrorIs(t, dec.DecodeColumn(r, rows), io.EOF)
})
t.Run("NoShortRead", func(t *testing.T) {
dec := new(ColStr).LowCardinality().Array()
requireNoShortRead(t, buf.Buf, colAware(dec, rows))
})
}
func TestColLowCardinality_DecodeColumn(t *testing.T) {
t.Run("Str", func(t *testing.T) {
const rows = 25
values := []string{
"neo",
"trinity",
"morpheus",
}
col := new(ColStr).LowCardinality()
for i := 0; i < rows; i++ {
col.Append(values[i%len(values)])
}
require.NoError(t, col.Prepare())
var buf Buffer
col.EncodeColumn(&buf)
t.Run("Golden", func(t *testing.T) {
gold.Bytes(t, buf.Buf, "col_low_cardinality_i_str_k_8")
})
t.Run("Ok", func(t *testing.T) {
br := bytes.NewReader(buf.Buf)
r := NewReader(br)
dec := new(ColStr).LowCardinality()
require.NoError(t, dec.DecodeColumn(r, rows))
requireEqual[string](t, col, dec)
dec.Reset()
require.Equal(t, 0, dec.Rows())
require.Equal(t, ColumnTypeLowCardinality.Sub(ColumnTypeString), dec.Type())
})
t.Run("EOF", func(t *testing.T) {
r := NewReader(bytes.NewReader(nil))
dec := new(ColStr).LowCardinality()
require.ErrorIs(t, dec.DecodeColumn(r, rows), io.EOF)
})
t.Run("NoShortRead", func(t *testing.T) {
dec := new(ColStr).LowCardinality()
requireNoShortRead(t, buf.Buf, colAware(dec, rows))
})
})
t.Run("Blank", func(t *testing.T) {
// Blank columns (i.e. row count is zero) are not encoded.
col := new(ColStr).LowCardinality()
var buf Buffer
require.NoError(t, col.Prepare())
col.EncodeColumn(&buf)
var dec ColLowCardinality[string]
require.NoError(t, dec.DecodeColumn(buf.Reader(), col.Rows()))
})
t.Run("InvalidVersion", func(t *testing.T) {
var buf Buffer
buf.PutInt64(2)
var dec ColLowCardinality[string]
require.NoError(t, dec.DecodeColumn(buf.Reader(), 0))
require.Error(t, dec.DecodeColumn(buf.Reader(), 1))
})
t.Run("InvalidMeta", func(t *testing.T) {
var buf Buffer
buf.PutInt64(1)
buf.PutInt64(0)
var dec ColLowCardinality[string]
require.NoError(t, dec.DecodeColumn(buf.Reader(), 0))
require.Error(t, dec.DecodeColumn(buf.Reader(), 1))
})
t.Run("InvalidKeyType", func(t *testing.T) {
var buf Buffer
buf.PutInt64(1)
buf.PutInt64(cardinalityUpdateAll | int64(KeyUInt64+1))
var dec ColLowCardinality[string]
require.NoError(t, dec.DecodeColumn(buf.Reader(), 0))
require.Error(t, dec.DecodeColumn(buf.Reader(), 1))
})
}
|
