35215d6a07
While the lifecycle tests wrote a `.yarnrc` file to ensure that copies of `yarn` did not race with one another, the more barebones testing framework did not. This should address some of the yarn issues we've been seeing in CI recently
171 lines
5.7 KiB
Go
171 lines
5.7 KiB
Go
// Copyright 2016-2018, Pulumi Corporation.
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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 testing
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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"strings"
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"testing"
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"github.com/pulumi/pulumi/pkg/util/fsutil"
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"github.com/stretchr/testify/assert"
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)
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const (
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pulumiCredentialsPathEnvVar = "PULUMI_CREDENTIALS_PATH"
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)
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// Environment is an extension of the testing.T type that provides support for a test environment
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// on the local disk. The Environment has a root directory (e.g. a newly created temp folder) and
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// a current working directory (to virtually change directories).
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type Environment struct {
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*testing.T
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// RootPath is a new temp directory where the environment starts.
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RootPath string
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// Current working directory.
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CWD string
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}
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// WriteYarnRCForTest writes a .yarnrc file which sets global configuration for every yarn inovcation. We use this
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// to work around some test issues we see in Travis.
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func WriteYarnRCForTest(root string) error {
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// Write a .yarnrc file to pass --mutex network to all yarn invocations, since tests
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// may run concurrently and yarn may fail if invoked concurrently
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// https://github.com/yarnpkg/yarn/issues/683
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// Also add --network-concurrency 1 since we've been seeing
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// https://github.com/yarnpkg/yarn/issues/4563 as well
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return ioutil.WriteFile(
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filepath.Join(root, ".yarnrc"),
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[]byte("--mutex network\n--network-concurrency 1\n"), 0644)
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}
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// NewEnvironment returns a new Environment object, located in a temp directory.
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func NewEnvironment(t *testing.T) *Environment {
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root, err := ioutil.TempDir("", "test-env")
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assert.NoError(t, err, "creating temp directory")
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assert.NoError(t, WriteYarnRCForTest(root), "writing .yarnrc file")
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t.Logf("Created new test environment: %v", root)
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return &Environment{
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T: t,
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RootPath: root,
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CWD: root,
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}
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}
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// ImportDirectory copies a folder into the test environment.
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func (e *Environment) ImportDirectory(path string) {
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err := fsutil.CopyFile(e.RootPath, path, nil)
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if err != nil {
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e.T.Fatalf("error importing directory: %v", err)
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}
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}
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// DeleteEnvironment deletes the environment's RootPath, and everything underneath it.
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func (e *Environment) DeleteEnvironment() {
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e.Helper()
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err := os.RemoveAll(e.RootPath)
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assert.NoError(e, err, "cleaning up the test directory")
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}
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// DeleteIfNotFailed deletes the environment's RootPath if the test hasn't failed. Otherwise
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// keeps the files around for aiding debugging.
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func (e *Environment) DeleteIfNotFailed() {
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if !e.T.Failed() {
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e.DeleteEnvironment()
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}
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}
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// PathExists returns whether or not a file or directory exists relative to Environment's working directory.
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func (e *Environment) PathExists(p string) bool {
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fullPath := path.Join(e.CWD, p)
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_, err := os.Stat(fullPath)
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return err == nil
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}
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// RunCommand runs the command expecting a zero exit code, returning stdout and stderr.
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func (e *Environment) RunCommand(cmd string, args ...string) (string, string) {
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e.Helper()
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stdout, stderr, err := e.GetCommandResults(e.T, cmd, args...)
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if err != nil {
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e.Errorf("Ran command %v args %v and expected success. Instead got failure.", cmd, args)
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e.Logf("Run Error: %v", err)
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e.Logf("STDOUT: %v", stdout)
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e.Logf("STDERR: %v", stderr)
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}
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return stdout, stderr
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}
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// RunCommandExpectError runs the command expecting a non-zero exit code, returning stdout and stderr.
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func (e *Environment) RunCommandExpectError(cmd string, args ...string) (string, string) {
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e.Helper()
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stdout, stderr, err := e.GetCommandResults(e.T, cmd, args...)
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if err == nil {
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e.Errorf("Ran command %v args %v and expected failure. Instead got success.", cmd, args)
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e.Logf("STDOUT: %v", stdout)
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e.Logf("STDERR: %v", stderr)
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}
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return stdout, stderr
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}
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// LocalURL returns a URL that uses the "fire and forget", storing its data inside the test folder (so multiple tests)
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// may reuse stack names.
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func (e *Environment) LocalURL() string {
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return "file://" + e.RootPath
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}
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// GetCommandResults runs the given command and args in the Environments CWD, returning
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// STDOUT, STDERR, and the result of os/exec.Command{}.Run.
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func (e *Environment) GetCommandResults(t *testing.T, command string, args ...string) (string, string, error) {
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t.Helper()
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t.Logf("Running command %v %v", command, strings.Join(args, " "))
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// Buffer STDOUT and STDERR so we can return them later.
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var outBuffer bytes.Buffer
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var errBuffer bytes.Buffer
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// nolint: gas
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cmd := exec.Command(command, args...)
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cmd.Dir = e.CWD
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cmd.Stdout = &outBuffer
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cmd.Stderr = &errBuffer
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cmd.Env = append(os.Environ(), fmt.Sprintf("%s=%s", pulumiCredentialsPathEnvVar, e.RootPath))
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cmd.Env = append(cmd.Env, "PULUMI_DEBUG_COMMANDS=true")
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runErr := cmd.Run()
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return outBuffer.String(), errBuffer.String(), runErr
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}
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// WriteTestFile writes a new test file relative to the Environment's CWD with the given contents.
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// Aborts the underlying test on any errors.
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func (e *Environment) WriteTestFile(filename string, contents string) {
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filename = filepath.Join(e.CWD, filename)
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dir := filepath.Dir(filename)
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if err := os.MkdirAll(dir, os.ModePerm); err != nil {
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e.T.Fatalf("error making directories for test file (%v): %v", filename, err)
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}
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if err := ioutil.WriteFile(filename, []byte(contents), os.ModePerm); err != nil {
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e.T.Fatalf("writing test file (%v): %v", filename, err)
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}
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}
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