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Source file src/syscall/syscall_test.go

Documentation: syscall

     1  // Copyright 2013 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package syscall_test
     6  
     7  import (
     8  	"fmt"
     9  	"internal/testenv"
    10  	"os"
    11  	"runtime"
    12  	"syscall"
    13  	"testing"
    14  )
    15  
    16  func testSetGetenv(t *testing.T, key, value string) {
    17  	err := syscall.Setenv(key, value)
    18  	if err != nil {
    19  		t.Fatalf("Setenv failed to set %q: %v", value, err)
    20  	}
    21  	newvalue, found := syscall.Getenv(key)
    22  	if !found {
    23  		t.Fatalf("Getenv failed to find %v variable (want value %q)", key, value)
    24  	}
    25  	if newvalue != value {
    26  		t.Fatalf("Getenv(%v) = %q; want %q", key, newvalue, value)
    27  	}
    28  }
    29  
    30  func TestEnv(t *testing.T) {
    31  	testSetGetenv(t, "TESTENV", "AVALUE")
    32  	// make sure TESTENV gets set to "", not deleted
    33  	testSetGetenv(t, "TESTENV", "")
    34  }
    35  
    36  func TestItoa(t *testing.T) {
    37  	// Make most negative integer: 0x8000...
    38  	i := 1
    39  	for i<<1 != 0 {
    40  		i <<= 1
    41  	}
    42  	if i >= 0 {
    43  		t.Fatal("bad math")
    44  	}
    45  	s := syscall.Itoa(i)
    46  	f := fmt.Sprint(i)
    47  	if s != f {
    48  		t.Fatalf("itoa(%d) = %s, want %s", i, s, f)
    49  	}
    50  }
    51  
    52  // Check that permuting child process fds doesn't interfere with
    53  // reporting of fork/exec status. See Issue 14979.
    54  func TestExecErrPermutedFds(t *testing.T) {
    55  	testenv.MustHaveExec(t)
    56  
    57  	attr := &os.ProcAttr{Files: []*os.File{os.Stdin, os.Stderr, os.Stdout}}
    58  	_, err := os.StartProcess("/", []string{"/"}, attr)
    59  	if err == nil {
    60  		t.Fatalf("StartProcess of invalid program returned err = nil")
    61  	}
    62  }
    63  
    64  func TestGettimeofday(t *testing.T) {
    65  	if runtime.GOOS == "nacl" || runtime.GOOS == "js" {
    66  		t.Skip("not implemented on " + runtime.GOOS)
    67  	}
    68  	tv := &syscall.Timeval{}
    69  	if err := syscall.Gettimeofday(tv); err != nil {
    70  		t.Fatal(err)
    71  	}
    72  	if tv.Sec == 0 && tv.Usec == 0 {
    73  		t.Fatal("Sec and Usec both zero")
    74  	}
    75  }
    76  

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