mirror of
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68 lines
2.0 KiB
Go
68 lines
2.0 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package testutil contains helper functions for writing tests.
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package testutil
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import (
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"io/ioutil"
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"log"
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"os"
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"golang.org/x/net/context"
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"golang.org/x/oauth2"
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"golang.org/x/oauth2/google"
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)
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const (
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envProjID = "GCLOUD_TESTS_GOLANG_PROJECT_ID"
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envPrivateKey = "GCLOUD_TESTS_GOLANG_KEY"
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)
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// ProjID returns the project ID to use in integration tests, or the empty
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// string if none is configured.
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func ProjID() string {
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projID := os.Getenv(envProjID)
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if projID == "" {
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return ""
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}
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return projID
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}
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// TokenSource returns the OAuth2 token source to use in integration tests,
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// or nil if none is configured. If the environment variable is unset,
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// TokenSource will try to find 'Application Default Credentials'. Else,
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// TokenSource will return nil.
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// TokenSource will log.Fatal if the token source is specified but missing or invalid.
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func TokenSource(ctx context.Context, scopes ...string) oauth2.TokenSource {
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key := os.Getenv(envPrivateKey)
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if key == "" { // Try for application default credentials.
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ts, err := google.DefaultTokenSource(ctx, scopes...)
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if err != nil {
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log.Println("No 'Application Default Credentials' found.")
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return nil
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}
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return ts
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}
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jsonKey, err := ioutil.ReadFile(key)
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if err != nil {
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log.Fatalf("Cannot read the JSON key file, err: %v", err)
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}
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conf, err := google.JWTConfigFromJSON(jsonKey, scopes...)
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if err != nil {
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log.Fatalf("google.JWTConfigFromJSON: %v", err)
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}
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return conf.TokenSource(ctx)
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}
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