decoder_test.go

/*
	Copyright 2023 Loophole Labs

	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at

		   http://www.apache.org/licenses/LICENSE-2.0

	Unless required by applicable law or agreed to in writing, software
	distributed under the License is distributed on an "AS IS" BASIS,
	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	See the License for the specific language governing permissions and
	limitations under the License.
*/

package polyglot

import (
	"github.com/stretchr/testify/assert"

	"errors"
	"testing"
)

func TestDecoderNil(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	Encoder(p).Nil()

	d := GetDecoder(p.Bytes())
	value := d.Nil()
	assert.True(t, value)

	value = d.Nil()
	assert.False(t, value)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Nil()
		d = GetDecoder(p.Bytes())
		value = d.Nil()
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderMap(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	m := make(map[string]uint32)
	m["1"] = 1
	m["2"] = 2
	m["3"] = 3

	e := Encoder(p).Map(uint32(len(m)), StringKind, Uint32Kind)
	for k, v := range m {
		e.String(k).Uint32(v)
	}

	d := GetDecoder(p.Bytes())
	size, err := d.Map(StringKind, Uint32Kind)
	assert.NoError(t, err)
	assert.Equal(t, uint32(len(m)), size)

	mv := make(map[string]uint32, size)
	var k string
	var v uint32
	for i := uint32(0); i < size; i++ {
		k, err = d.String()
		assert.NoError(t, err)
		v, err = d.Uint32()
		assert.NoError(t, err)
		mv[k] = v
	}
	assert.Equal(t, m, mv)

	size, err = d.Map(StringKind, Uint32Kind)
	assert.ErrorIs(t, err, InvalidMap)
	assert.Equal(t, uint32(0), size)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		e = Encoder(p).Map(uint32(len(m)), StringKind, Uint32Kind)
		for k, v = range m {
			e.String(k).Uint32(v)
		}
		d = GetDecoder(p.Bytes())
		size, err = d.Map(StringKind, Uint32Kind)
		for i := uint32(0); i < size; i++ {
			_, _ = d.String()
			_, _ = d.Uint32()
		}
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderSlice(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	m := []string{"1", "2", "3"}

	e := Encoder(p).Slice(uint32(len(m)), StringKind)
	for _, v := range m {
		e.String(v)
	}

	d := GetDecoder(p.Bytes())
	size, err := d.Slice(StringKind)
	assert.NoError(t, err)
	assert.Equal(t, uint32(len(m)), size)

	mv := make([]string, size)
	for i := range mv {
		mv[i], err = d.String()
		assert.NoError(t, err)
		assert.Equal(t, m[i], mv[i])
	}
	assert.Equal(t, m, mv)

	size, err = d.Slice(StringKind)
	assert.ErrorIs(t, err, InvalidSlice)
	assert.Equal(t, uint32(0), size)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		e = Encoder(p).Slice(uint32(len(m)), StringKind)
		for _, v := range m {
			e.String(v)
		}
		d = GetDecoder(p.Bytes())
		size, err = d.Slice(StringKind)
		for i := uint32(0); i < size; i++ {
			_, _ = d.String()
		}
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderBytes(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	v := []byte("Test String")

	Encoder(p).Bytes(v)

	d := GetDecoder(p.Bytes())
	value, err := d.Bytes(nil)
	assert.NoError(t, err)
	assert.Equal(t, v, value)

	value, err = d.Bytes(value)
	assert.ErrorIs(t, err, InvalidBytes)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Bytes(v)
		d = GetDecoder(p.Bytes())
		value, err = d.Bytes(value)
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderString(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	v := "Test String"

	Encoder(p).String(v)

	d := GetDecoder(p.Bytes())
	value, err := d.String()
	assert.NoError(t, err)
	assert.Equal(t, v, value)

	value, err = d.String()
	assert.ErrorIs(t, err, InvalidString)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).String(v)
		d = GetDecoder(p.Bytes())
		value, err = d.String()
		d.Return()
		p.Reset()
	})
	assert.Equal(t, float64(1), n)
}

func TestDecoderError(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	v := errors.New("Test Error")

	Encoder(p).Error(v)

	d := GetDecoder(p.Bytes())
	value, err := d.Error()
	assert.NoError(t, err)
	assert.ErrorIs(t, value, v)

	value, err = d.Error()
	assert.ErrorIs(t, err, InvalidError)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Error(v)
		d = GetDecoder(p.Bytes())
		value, err = d.Error()
		d.Return()
		p.Reset()
	})
	assert.Equal(t, float64(2), n)
}

func TestDecoderBool(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	Encoder(p).Bool(true)

	d := GetDecoder(p.Bytes())
	value, err := d.Bool()
	assert.NoError(t, err)
	assert.True(t, value)

	value, err = d.Bool()
	assert.ErrorIs(t, err, InvalidBool)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Bool(true)
		d = GetDecoder(p.Bytes())
		value, err = d.Bool()
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderUint8(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	v := uint8(32)

	Encoder(p).Uint8(v)

	d := GetDecoder(p.Bytes())
	value, err := d.Uint8()
	assert.NoError(t, err)
	assert.Equal(t, v, value)

	value, err = d.Uint8()
	assert.ErrorIs(t, err, InvalidUint8)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Uint8(v)
		d = GetDecoder(p.Bytes())
		value, err = d.Uint8()
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderUint16(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	v := uint16(1024)

	Encoder(p).Uint16(v)

	d := GetDecoder(p.Bytes())
	value, err := d.Uint16()
	assert.NoError(t, err)
	assert.Equal(t, v, value)

	value, err = d.Uint16()
	assert.ErrorIs(t, err, InvalidUint16)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Uint16(v)
		d = GetDecoder(p.Bytes())
		value, err = d.Uint16()
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderUint32(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	v := uint32(4294967290)

	Encoder(p).Uint32(v)

	d := GetDecoder(p.Bytes())
	value, err := d.Uint32()
	assert.NoError(t, err)
	assert.Equal(t, v, value)

	value, err = d.Uint32()
	assert.ErrorIs(t, err, InvalidUint32)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Uint32(v)
		d = GetDecoder(p.Bytes())
		value, err = d.Uint32()
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderUint64(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	v := uint64(18446744073709551610)

	Encoder(p).Uint64(v)

	d := GetDecoder(p.Bytes())
	value, err := d.Uint64()
	assert.NoError(t, err)
	assert.Equal(t, v, value)

	value, err = d.Uint64()
	assert.ErrorIs(t, err, InvalidUint64)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Uint64(v)
		d = GetDecoder(p.Bytes())
		value, err = d.Uint64()
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderInt32(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	v := int32(-2147483648)

	Encoder(p).Int32(v)

	d := GetDecoder(p.Bytes())
	value, err := d.Int32()
	assert.NoError(t, err)
	assert.Equal(t, v, value)

	value, err = d.Int32()
	assert.ErrorIs(t, err, InvalidInt32)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Int32(v)
		d = GetDecoder(p.Bytes())
		value, err = d.Int32()
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderInt64(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	v := int64(-9223372036854775808)

	Encoder(p).Int64(v)

	d := GetDecoder(p.Bytes())
	value, err := d.Int64()
	assert.NoError(t, err)
	assert.Equal(t, v, value)

	value, err = d.Int64()
	assert.ErrorIs(t, err, InvalidInt64)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Int64(v)
		d = GetDecoder(p.Bytes())
		value, err = d.Int64()
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderFloat32(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	v := float32(-2147483.648)

	Encoder(p).Float32(v)

	d := GetDecoder(p.Bytes())
	value, err := d.Float32()
	assert.NoError(t, err)
	assert.Equal(t, v, value)

	value, err = d.Float32()
	assert.ErrorIs(t, err, InvalidFloat32)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Float32(v)
		d = GetDecoder(p.Bytes())
		value, err = d.Float32()
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}

func TestDecoderFloat64(t *testing.T) {
	t.Parallel()

	p := NewBuffer()
	v := -922337203.477580

	Encoder(p).Float64(v)

	d := GetDecoder(p.Bytes())
	value, err := d.Float64()
	assert.NoError(t, err)
	assert.Equal(t, v, value)

	value, err = d.Float64()
	assert.ErrorIs(t, err, InvalidFloat64)

	d.Return()

	p.Reset()
	n := testing.AllocsPerRun(100, func() {
		Encoder(p).Float64(v)
		d = GetDecoder(p.Bytes())
		value, err = d.Float64()
		d.Return()
		p.Reset()
	})
	assert.Zero(t, n)
}