github.com/arieschain/arieschain@v0.0.0-20191023063405-37c074544356/common/fdlimit/fdlimit_test.go (about)

     1  package fdlimit
     2  
     3  import (
     4  	"fmt"
     5  	"testing"
     6  )
     7  
     8  // TestFileDescriptorLimits simply tests whether the file descriptor allowance
     9  // per this process can be retrieved.
    10  func TestFileDescriptorLimits(t *testing.T) {
    11  	target := 4096
    12  	hardlimit, err := Maximum()
    13  	if err != nil {
    14  		t.Fatal(err)
    15  	}
    16  	if hardlimit < target {
    17  		t.Skip(fmt.Sprintf("system limit is less than desired test target: %d < %d", hardlimit, target))
    18  	}
    19  
    20  	if limit, err := Current(); err != nil || limit <= 0 {
    21  		t.Fatalf("failed to retrieve file descriptor limit (%d): %v", limit, err)
    22  	}
    23  	if err := Raise(uint64(target)); err != nil {
    24  		t.Fatalf("failed to raise file allowance")
    25  	}
    26  	if limit, err := Current(); err != nil || limit < target {
    27  		t.Fatalf("failed to retrieve raised descriptor limit (have %v, want %v): %v", limit, target, err)
    28  	}
    29  }