github.com/bytedance/gopkg@v0.0.0-20240514070511-01b2cbcf35e1/internal/runtimex/runtime_test.go (about)

     1  // Copyright 2024 ByteDance Inc.
     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  //     http://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 runtimex
    16  
    17  import "testing"
    18  
    19  func TestFastrand(t *testing.T) {
    20  	var isRandom bool
    21  	for i := 0; i < 3; i++ {
    22  		x := Fastrand()
    23  		y := Fastrand()
    24  		if x != y {
    25  			isRandom = true
    26  			break
    27  		}
    28  	}
    29  	if !isRandom {
    30  		t.Fatal("Invalid fastrand results")
    31  	}
    32  }
    33  
    34  func BenchmarkFastrand(b *testing.B) {
    35  	for i := 0; i < b.N; i++ {
    36  		Fastrand()
    37  	}
    38  }