120 lines
2.7 KiB
Go
120 lines
2.7 KiB
Go
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// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package sys
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import (
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"bytes"
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"io"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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var _ io.Writer = &ByteBuffer{}
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func TestByteBuffer(t *testing.T) {
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input := "hello"
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length := len(input)
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buf := NewByteBuffer(1024)
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n, err := buf.Write([]byte(input))
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if err != nil {
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t.Fatal(err)
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}
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assert.Equal(t, length, n)
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assert.Equal(t, input, string(buf.Bytes()))
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assert.Equal(t, length, len(buf.Bytes()))
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assert.Equal(t, length, buf.Len())
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}
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func TestByteBufferGrow(t *testing.T) {
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input := "hello"
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length := len(input)
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buf := NewByteBuffer(0)
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n, err := buf.Write([]byte(input))
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if err != nil {
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t.Fatal(err)
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}
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assert.Equal(t, length, n)
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assert.Equal(t, input, string(buf.Bytes()))
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assert.Equal(t, length, len(buf.Bytes()))
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assert.Equal(t, length, buf.Len())
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assert.Equal(t, length, len(buf.buf))
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n, err = buf.Write([]byte(input))
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if err != nil {
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t.Fatal(err)
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}
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assert.Equal(t, length, n)
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assert.Equal(t, input+input, string(buf.Bytes()))
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assert.Equal(t, 2*length, len(buf.Bytes()))
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assert.Equal(t, 2*length, buf.Len())
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}
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func BenchmarkByteBuffer(b *testing.B) {
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input := []byte("test writing this sentence to a buffer")
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b.Run("byteBuffer", func(b *testing.B) {
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buf := NewByteBuffer(1024)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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buf.Write(input)
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buf.Bytes()
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buf.Reset()
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}
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})
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b.Run("bytes.Buffer", func(b *testing.B) {
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buf := bytes.NewBuffer(make([]byte, 0, 1024))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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buf.Write(input)
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buf.Bytes()
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buf.Reset()
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}
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})
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}
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func BenchmarkByteBufferGrow(b *testing.B) {
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b.Run("byteBuffer", func(b *testing.B) {
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buf := NewByteBuffer(0)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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buf.Write([]byte("a"))
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buf.Bytes()
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}
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})
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b.Run("bytes.Buffer", func(b *testing.B) {
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buf := bytes.NewBuffer(make([]byte, 0))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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buf.Write([]byte("a"))
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buf.Bytes()
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}
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})
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}
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