| // Copyright 2017 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package cpu_test |
| |
| import ( |
| . "internal/cpu" |
| "internal/godebug" |
| "internal/testenv" |
| "os" |
| "os/exec" |
| "testing" |
| ) |
| |
| func MustHaveDebugOptionsSupport(t *testing.T) { |
| if !DebugOptions { |
| t.Skipf("skipping test: cpu feature options not supported by OS") |
| } |
| } |
| |
| func MustSupportFeatureDetection(t *testing.T) { |
| // TODO: add platforms that do not have CPU feature detection support. |
| } |
| |
| func runDebugOptionsTest(t *testing.T, test string, options string) { |
| MustHaveDebugOptionsSupport(t) |
| |
| testenv.MustHaveExec(t) |
| |
| env := "GODEBUG=" + options |
| |
| cmd := exec.Command(os.Args[0], "-test.run=^"+test+"$") |
| cmd.Env = append(cmd.Env, env) |
| |
| output, err := cmd.CombinedOutput() |
| if err != nil { |
| t.Fatalf("%s with %s: run failed: %v output:\n%s\n", |
| test, env, err, string(output)) |
| } |
| } |
| |
| func TestDisableAllCapabilities(t *testing.T) { |
| MustSupportFeatureDetection(t) |
| runDebugOptionsTest(t, "TestAllCapabilitiesDisabled", "cpu.all=off") |
| } |
| |
| func TestAllCapabilitiesDisabled(t *testing.T) { |
| MustHaveDebugOptionsSupport(t) |
| |
| if godebug.New("#cpu.all").Value() != "off" { |
| t.Skipf("skipping test: GODEBUG=cpu.all=off not set") |
| } |
| |
| for _, o := range Options { |
| want := false |
| if got := *o.Feature; got != want { |
| t.Errorf("%v: expected %v, got %v", o.Name, want, got) |
| } |
| } |
| } |