terraform/command/e2etest/automation_test.go

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package e2etest
import (
"path/filepath"
"reflect"
"sort"
"strings"
"testing"
"github.com/davecgh/go-spew/spew"
"github.com/hashicorp/terraform/e2e"
)
// The tests in this file run through different scenarios recommended in our
// "Running Terraform in Automation" guide:
// https://www.terraform.io/guides/running-terraform-in-automation.html
// TestPlanApplyInAutomation runs through the "main case" of init, plan, apply
// using the specific command line options suggested in the guide.
func TestPlanApplyInAutomation(t *testing.T) {
t.Parallel()
// This test reaches out to releases.hashicorp.com to download the
// template and null providers, so it can only run if network access is
// allowed.
skipIfCannotAccessNetwork(t)
fixturePath := filepath.Join("test-fixtures", "full-workflow-null")
tf := e2e.NewBinary(terraformBin, fixturePath)
defer tf.Close()
// We advertise that _any_ non-empty value works, so we'll test something
// unconventional here.
tf.AddEnv("TF_IN_AUTOMATION=yes-please")
//// INIT
stdout, stderr, err := tf.Run("init", "-input=false")
if err != nil {
t.Fatalf("unexpected init error: %s\nstderr:\n%s", err, stderr)
}
// Make sure we actually downloaded the plugins, rather than picking up
// copies that might be already installed globally on the system.
if !strings.Contains(stdout, "- Downloading plugin for provider \"template\"") {
t.Errorf("template provider download message is missing from init output:\n%s", stdout)
t.Logf("(this can happen if you have a copy of the plugin in one of the global plugin search dirs)")
}
if !strings.Contains(stdout, "- Downloading plugin for provider \"null\"") {
t.Errorf("null provider download message is missing from init output:\n%s", stdout)
t.Logf("(this can happen if you have a copy of the plugin in one of the global plugin search dirs)")
}
//// PLAN
stdout, stderr, err = tf.Run("plan", "-out=tfplan", "-input=false")
if err != nil {
t.Fatalf("unexpected plan error: %s\nstderr:\n%s", err, stderr)
}
if !strings.Contains(stdout, "1 to add, 0 to change, 0 to destroy") {
t.Errorf("incorrect plan tally; want 1 to add:\n%s", stdout)
}
// Because we're running with TF_IN_AUTOMATION set, we should not see
// any mention of the plan file in the output.
if strings.Contains(stdout, "tfplan") {
t.Errorf("unwanted mention of \"tfplan\" file in plan output\n%s", stdout)
}
plan, err := tf.Plan("tfplan")
if err != nil {
t.Fatalf("failed to read plan file: %s", err)
}
stateResources := plan.State.RootModule().Resources
diffResources := plan.Diff.RootModule().Resources
if len(stateResources) != 1 || stateResources["data.template_file.test"] == nil {
t.Errorf("incorrect state in plan; want just data.template_file.test to have been rendered, but have:\n%s", spew.Sdump(stateResources))
}
if len(diffResources) != 1 || diffResources["null_resource.test"] == nil {
t.Errorf("incorrect diff in plan; want just null_resource.test to have been rendered, but have:\n%s", spew.Sdump(diffResources))
}
//// APPLY
stdout, stderr, err = tf.Run("apply", "-input=false", "tfplan")
if err != nil {
t.Fatalf("unexpected apply error: %s\nstderr:\n%s", err, stderr)
}
if !strings.Contains(stdout, "Resources: 1 added, 0 changed, 0 destroyed") {
t.Errorf("incorrect apply tally; want 1 added:\n%s", stdout)
}
state, err := tf.LocalState()
if err != nil {
t.Fatalf("failed to read state file: %s", err)
}
stateResources = state.RootModule().Resources
var gotResources []string
for n := range stateResources {
gotResources = append(gotResources, n)
}
sort.Strings(gotResources)
wantResources := []string{
"data.template_file.test",
"null_resource.test",
}
if !reflect.DeepEqual(gotResources, wantResources) {
t.Errorf("wrong resources in state\ngot: %#v\nwant: %#v", gotResources, wantResources)
}
}
// TestAutoApplyInAutomation tests the scenario where the caller skips creating
// an explicit plan and instead forces automatic application of changes.
func TestAutoApplyInAutomation(t *testing.T) {
t.Parallel()
// This test reaches out to releases.hashicorp.com to download the
// template and null providers, so it can only run if network access is
// allowed.
skipIfCannotAccessNetwork(t)
fixturePath := filepath.Join("test-fixtures", "full-workflow-null")
tf := e2e.NewBinary(terraformBin, fixturePath)
defer tf.Close()
// We advertise that _any_ non-empty value works, so we'll test something
// unconventional here.
tf.AddEnv("TF_IN_AUTOMATION=very-much-so")
//// INIT
stdout, stderr, err := tf.Run("init", "-input=false")
if err != nil {
t.Fatalf("unexpected init error: %s\nstderr:\n%s", err, stderr)
}
// Make sure we actually downloaded the plugins, rather than picking up
// copies that might be already installed globally on the system.
if !strings.Contains(stdout, "- Downloading plugin for provider \"template\"") {
t.Errorf("template provider download message is missing from init output:\n%s", stdout)
t.Logf("(this can happen if you have a copy of the plugin in one of the global plugin search dirs)")
}
if !strings.Contains(stdout, "- Downloading plugin for provider \"null\"") {
t.Errorf("null provider download message is missing from init output:\n%s", stdout)
t.Logf("(this can happen if you have a copy of the plugin in one of the global plugin search dirs)")
}
//// APPLY
stdout, stderr, err = tf.Run("apply", "-input=false", "-auto-approve=true")
if err != nil {
t.Fatalf("unexpected apply error: %s\nstderr:\n%s", err, stderr)
}
if !strings.Contains(stdout, "Resources: 1 added, 0 changed, 0 destroyed") {
t.Errorf("incorrect apply tally; want 1 added:\n%s", stdout)
}
state, err := tf.LocalState()
if err != nil {
t.Fatalf("failed to read state file: %s", err)
}
stateResources := state.RootModule().Resources
var gotResources []string
for n := range stateResources {
gotResources = append(gotResources, n)
}
sort.Strings(gotResources)
wantResources := []string{
"data.template_file.test",
"null_resource.test",
}
if !reflect.DeepEqual(gotResources, wantResources) {
t.Errorf("wrong resources in state\ngot: %#v\nwant: %#v", gotResources, wantResources)
}
}
// TestPlanOnlyInAutomation tests the scenario of creating a "throwaway" plan,
// which we recommend as a way to verify a pull request.
func TestPlanOnlyInAutomation(t *testing.T) {
t.Parallel()
// This test reaches out to releases.hashicorp.com to download the
// template and null providers, so it can only run if network access is
// allowed.
skipIfCannotAccessNetwork(t)
fixturePath := filepath.Join("test-fixtures", "full-workflow-null")
tf := e2e.NewBinary(terraformBin, fixturePath)
defer tf.Close()
// We advertise that _any_ non-empty value works, so we'll test something
// unconventional here.
tf.AddEnv("TF_IN_AUTOMATION=verily")
//// INIT
stdout, stderr, err := tf.Run("init", "-input=false")
if err != nil {
t.Fatalf("unexpected init error: %s\nstderr:\n%s", err, stderr)
}
// Make sure we actually downloaded the plugins, rather than picking up
// copies that might be already installed globally on the system.
if !strings.Contains(stdout, "- Downloading plugin for provider \"template\"") {
t.Errorf("template provider download message is missing from init output:\n%s", stdout)
t.Logf("(this can happen if you have a copy of the plugin in one of the global plugin search dirs)")
}
if !strings.Contains(stdout, "- Downloading plugin for provider \"null\"") {
t.Errorf("null provider download message is missing from init output:\n%s", stdout)
t.Logf("(this can happen if you have a copy of the plugin in one of the global plugin search dirs)")
}
//// PLAN
stdout, stderr, err = tf.Run("plan", "-input=false")
if err != nil {
t.Fatalf("unexpected plan error: %s\nstderr:\n%s", err, stderr)
}
if !strings.Contains(stdout, "1 to add, 0 to change, 0 to destroy") {
t.Errorf("incorrect plan tally; want 1 to add:\n%s", stdout)
}
// Because we're running with TF_IN_AUTOMATION set, we should not see
// any mention of the the "terraform apply" command in the output.
if strings.Contains(stdout, "terraform apply") {
t.Errorf("unwanted mention of \"terraform apply\" in plan output\n%s", stdout)
}
if tf.FileExists("tfplan") {
t.Error("plan file was created, but was not expected")
}
}