| // Copyright 2016 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package metadata |
| |
| import ( |
| "os" |
| "sync" |
| "testing" |
| ) |
| |
| func TestOnGCE_Stress(t *testing.T) { |
| if testing.Short() { |
| t.Skip("skipping in -short mode") |
| } |
| var last bool |
| for i := 0; i < 100; i++ { |
| onGCEOnce = sync.Once{} |
| |
| now := OnGCE() |
| if i > 0 && now != last { |
| t.Errorf("%d. changed from %v to %v", i, last, now) |
| } |
| last = now |
| } |
| t.Logf("OnGCE() = %v", last) |
| } |
| |
| func TestOnGCE_Force(t *testing.T) { |
| onGCEOnce = sync.Once{} |
| old := os.Getenv(metadataHostEnv) |
| defer os.Setenv(metadataHostEnv, old) |
| os.Setenv(metadataHostEnv, "127.0.0.1") |
| if !OnGCE() { |
| t.Error("OnGCE() = false; want true") |
| } |
| } |