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package encoding
import (
"math"
"testing"
"github.com/Azure/go-amqp/internal/buffer"
"github.com/stretchr/testify/require"
)
const amqpArrayHeaderLength = 4
func TestMarshalArrayInt64AsLongArray(t *testing.T) {
// 244 is larger than a int8 can contain. When it marshals it
// it'll have to use the typeCodeLong (8 bytes, signed) vs the
// typeCodeSmalllong (1 byte, signed).
ai := arrayInt64([]int64{math.MaxInt8 + 1})
buff := &buffer.Buffer{}
require.NoError(t, ai.Marshal(buff))
require.EqualValues(t, amqpArrayHeaderLength+8, buff.Len(), "Expected an AMQP header (4 bytes) + 8 bytes for a long")
unmarshalled := arrayInt64{}
require.NoError(t, unmarshalled.Unmarshal(buff))
require.EqualValues(t, arrayInt64([]int64{math.MaxInt8 + 1}), unmarshalled)
}
func TestMarshalArrayInt64AsSmallLongArray(t *testing.T) {
// If the values are small enough for a typeCodeSmalllong (1 byte, signed)
// we can save some space.
ai := arrayInt64([]int64{math.MaxInt8, math.MinInt8})
buff := &buffer.Buffer{}
require.NoError(t, ai.Marshal(buff))
require.EqualValues(t, amqpArrayHeaderLength+1+1, buff.Len(), "Expected an AMQP header (4 bytes) + 1 byte apiece for the two values")
unmarshalled := arrayInt64{}
require.NoError(t, unmarshalled.Unmarshal(buff))
require.EqualValues(t, arrayInt64([]int64{math.MaxInt8, math.MinInt8}), unmarshalled)
}
func TestDecodeSmallInts(t *testing.T) {
t.Run("smallong", func(t *testing.T) {
buff := &buffer.Buffer{}
v := int8(-1)
buff.AppendByte(byte(TypeCodeSmalllong))
buff.AppendByte(byte(v))
val, err := readLong(buff)
require.NoError(t, err)
require.Equal(t, int64(-1), val)
})
t.Run("smallint", func(t *testing.T) {
buff := &buffer.Buffer{}
v := int8(-1)
buff.AppendByte(byte(TypeCodeSmallint))
buff.AppendByte(byte(v))
val, err := readInt32(buff)
require.NoError(t, err)
require.Equal(t, int32(-1), val)
})
}
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