github.com/bytedance/sonic@v1.11.7-0.20240517092252-d2edb31b167b/internal/rt/stub_test.go (about)

     1  // Copyright 2024 CloudWeGo Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     https://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package rt
    16  
    17  import (
    18  	"testing"
    19  	"unsafe"
    20  )
    21  
    22  func TestGrowSlic(t *testing.T) {
    23  	et := UnpackEface(byte(0)).Type
    24  	n := make([]byte, 1, 1024)
    25  	println("n len:", len(n), "cap:", cap(n))
    26  	v := GrowSlice(et, *(*GoSlice)(unsafe.Pointer(&n)), 1025)
    27  	println("v len:", v.Len, "cap:", v.Cap)
    28  	// according to go growslice rule, the next cap must be at most 1.5x of old.Cap
    29  	if v.Cap > 1536 {
    30  		t.Fatal(v.Cap)
    31  	}
    32  }