github.com/sberex/go-sberex@v1.8.2-0.20181113200658-ed96ac38f7d7/common/fdlimit/fdlimit_test.go (about)

     1  // This file is part of the go-sberex library. The go-sberex library is 
     2  // free software: you can redistribute it and/or modify it under the terms 
     3  // of the GNU Lesser General Public License as published by the Free 
     4  // Software Foundation, either version 3 of the License, or (at your option)
     5  // any later version.
     6  //
     7  // The go-sberex library is distributed in the hope that it will be useful, 
     8  // but WITHOUT ANY WARRANTY; without even the implied warranty of
     9  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser 
    10  // General Public License <http://www.gnu.org/licenses/> for more details.
    11  
    12  package fdlimit
    13  
    14  import (
    15  	"fmt"
    16  	"testing"
    17  )
    18  
    19  // TestFileDescriptorLimits simply tests whether the file descriptor allowance
    20  // per this process can be retrieved.
    21  func TestFileDescriptorLimits(t *testing.T) {
    22  	target := 4096
    23  	hardlimit, err := Maximum()
    24  	if err != nil {
    25  		t.Fatal(err)
    26  	}
    27  	if hardlimit < target {
    28  		t.Skip(fmt.Sprintf("system limit is less than desired test target: %d < %d", hardlimit, target))
    29  	}
    30  
    31  	if limit, err := Current(); err != nil || limit <= 0 {
    32  		t.Fatalf("failed to retrieve file descriptor limit (%d): %v", limit, err)
    33  	}
    34  	if err := Raise(uint64(target)); err != nil {
    35  		t.Fatalf("failed to raise file allowance")
    36  	}
    37  	if limit, err := Current(); err != nil || limit < target {
    38  		t.Fatalf("failed to retrieve raised descriptor limit (have %v, want %v): %v", limit, target, err)
    39  	}
    40  }