1
// Copyright 2014 Canonical Ltd.
2
// Licensed under the LGPLv3, see LICENCE file for details.
9
"github.com/juju/testing"
10
gc "gopkg.in/check.v1"
12
"github.com/juju/utils"
15
type gomaxprocsSuite struct {
16
testing.IsolationSuite
22
var _ = gc.Suite(&gomaxprocsSuite{})
24
func (s *gomaxprocsSuite) SetUpTest(c *gc.C) {
25
s.IsolationSuite.SetUpTest(c)
26
// always stub out GOMAXPROCS so we don't actually change anything
29
maxProcsFunc := func(n int) int {
33
numCPUFunc := func() int { return s.numCPUResponse }
34
s.PatchValue(utils.GOMAXPROCS, maxProcsFunc)
35
s.PatchValue(utils.NumCPU, numCPUFunc)
36
s.PatchEnvironment("GOMAXPROCS", "")
39
func (s *gomaxprocsSuite) TestUseMultipleCPUsDoesNothingWhenGOMAXPROCSSet(c *gc.C) {
40
os.Setenv("GOMAXPROCS", "1")
41
utils.UseMultipleCPUs()
42
c.Check(s.setMaxProcs, gc.Equals, 0)
45
func (s *gomaxprocsSuite) TestUseMultipleCPUsWhenEnabled(c *gc.C) {
46
utils.UseMultipleCPUs()
47
c.Check(s.setMaxProcs, gc.Equals, 2)
49
utils.UseMultipleCPUs()
50
c.Check(s.setMaxProcs, gc.Equals, 4)