terraform/command/plan_test.go

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package command
import (
"bytes"
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"io/ioutil"
"os"
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"path/filepath"
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"reflect"
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"strings"
"sync"
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"testing"
"time"
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"github.com/davecgh/go-spew/spew"
"github.com/mitchellh/cli"
"github.com/zclconf/go-cty/cty"
"github.com/hashicorp/terraform/addrs"
"github.com/hashicorp/terraform/configs/configschema"
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"github.com/hashicorp/terraform/helper/copy"
"github.com/hashicorp/terraform/plans"
"github.com/hashicorp/terraform/providers"
"github.com/hashicorp/terraform/states"
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"github.com/hashicorp/terraform/terraform"
)
func TestPlan(t *testing.T) {
cwd, err := os.Getwd()
if err != nil {
t.Fatalf("err: %s", err)
}
if err := os.Chdir(testFixturePath("plan")); err != nil {
t.Fatalf("err: %s", err)
}
defer os.Chdir(cwd)
p := planFixtureProvider()
ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
}
args := []string{}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
}
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func TestPlan_lockedState(t *testing.T) {
cwd, err := os.Getwd()
if err != nil {
t.Fatalf("err: %s", err)
}
testPath := testFixturePath("plan")
unlock, err := testLockState("./testdata", filepath.Join(testPath, DefaultStateFilename))
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if err != nil {
t.Fatal(err)
}
defer unlock()
if err := os.Chdir(testPath); err != nil {
t.Fatalf("err: %s", err)
}
defer os.Chdir(cwd)
p := planFixtureProvider()
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ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
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},
}
args := []string{}
if code := c.Run(args); code == 0 {
t.Fatal("expected error")
}
output := ui.ErrorWriter.String()
if !strings.Contains(output, "lock") {
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t.Fatal("command output does not look like a lock error:", output)
}
}
func TestPlan_plan(t *testing.T) {
tmp, cwd := testCwd(t)
defer testFixCwd(t, tmp, cwd)
planPath := testPlanFileNoop(t)
p := testProvider()
ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
}
args := []string{planPath}
if code := c.Run(args); code != 1 {
t.Fatalf("wrong exit status %d; want 1\nstderr: %s", code, ui.ErrorWriter.String())
}
if p.ReadResourceCalled {
t.Fatal("ReadResource should not have been called")
}
}
func TestPlan_destroy(t *testing.T) {
originalState := states.BuildState(func(s *states.SyncState) {
s.SetResourceInstanceCurrent(
addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_instance",
Name: "foo",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
&states.ResourceInstanceObjectSrc{
AttrsJSON: []byte(`{"id":"bar"}`),
Status: states.ObjectReady,
},
addrs.ProviderConfig{Type: "test"}.Absolute(addrs.RootModuleInstance),
)
})
outPath := testTempFile(t)
statePath := testStateFile(t, originalState)
p := planFixtureProvider()
ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
}
args := []string{
"-destroy",
"-out", outPath,
"-state", statePath,
testFixturePath("plan"),
}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
if !p.ReadResourceCalled {
t.Fatal("ReadResource should have been called")
}
plan := testReadPlan(t, outPath)
for _, rc := range plan.Changes.Resources {
if got, want := rc.Action, plans.Delete; got != want {
t.Fatalf("wrong action %s for %s; want %s\nplanned change: %s", got, rc.Addr, want, spew.Sdump(rc))
}
}
}
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func TestPlan_noState(t *testing.T) {
tmp, cwd := testCwd(t)
defer testFixCwd(t, tmp, cwd)
p := planFixtureProvider()
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ui := new(cli.MockUi)
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c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
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}
args := []string{
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testFixturePath("plan"),
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}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
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// Verify that refresh was called
if p.ReadResourceCalled {
t.Fatal("ReadResource should not be called")
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}
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// Verify that the provider was called with the existing state
actual := p.PlanResourceChangeRequest.PriorState
expected := cty.NullVal(p.GetSchemaReturn.ResourceTypes["test_instance"].ImpliedType())
if !expected.RawEquals(actual) {
t.Fatalf("wrong prior state\ngot: %#v\nwant: %#v", actual, expected)
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}
}
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func TestPlan_outPath(t *testing.T) {
tmp, cwd := testCwd(t)
defer testFixCwd(t, tmp, cwd)
td := testTempDir(t)
outPath := filepath.Join(td, "test.plan")
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p := planFixtureProvider()
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ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
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}
p.PlanResourceChangeResponse = providers.PlanResourceChangeResponse{
PlannedState: cty.NullVal(cty.EmptyObject),
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}
args := []string{
"-out", outPath,
testFixturePath("plan"),
}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
testReadPlan(t, outPath) // will call t.Fatal itself if the file cannot be read
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}
func TestPlan_outPathNoChange(t *testing.T) {
originalState := states.BuildState(func(s *states.SyncState) {
s.SetResourceInstanceCurrent(
addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_instance",
Name: "foo",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
&states.ResourceInstanceObjectSrc{
// Aside from "id" (which is computed) the values here must
// exactly match the values in the "plan" test fixture in order
// to produce the empty plan we need for this test.
AttrsJSON: []byte(`{"id":"bar","ami":"bar","network_interface":[{"description":"Main network interface","device_index":"0"}]}`),
Status: states.ObjectReady,
},
addrs.ProviderConfig{Type: "test"}.Absolute(addrs.RootModuleInstance),
)
})
statePath := testStateFile(t, originalState)
td := testTempDir(t)
outPath := filepath.Join(td, "test.plan")
p := planFixtureProvider()
ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
}
args := []string{
"-out", outPath,
"-state", statePath,
testFixturePath("plan"),
}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
plan := testReadPlan(t, outPath)
if !plan.Changes.Empty() {
t.Fatalf("Expected empty plan to be written to plan file, got: %s", spew.Sdump(plan))
}
}
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// When using "-out" with a backend, the plan should encode the backend config
func TestPlan_outBackend(t *testing.T) {
// Create a temporary working directory that is empty
td := tempDir(t)
copy.CopyDir(testFixturePath("plan-out-backend"), td)
defer os.RemoveAll(td)
defer testChdir(t, td)()
// Our state
originalState := &terraform.State{
Modules: []*terraform.ModuleState{
&terraform.ModuleState{
Path: []string{"root"},
Resources: map[string]*terraform.ResourceState{
"test_instance.foo": &terraform.ResourceState{
Type: "test_instance",
Primary: &terraform.InstanceState{
ID: "bar",
},
},
},
},
},
}
originalState.Init()
// Setup our backend state
dataState, srv := testBackendState(t, originalState, 200)
defer srv.Close()
testStateFileRemote(t, dataState)
outPath := "foo"
p := testProvider()
ui := cli.NewMockUi()
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c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
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},
}
args := []string{
"-out", outPath,
}
if code := c.Run(args); code != 0 {
t.Logf("stdout: %s", ui.OutputWriter.String())
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t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
plan := testReadPlan(t, outPath)
if !plan.Changes.Empty() {
t.Fatalf("Expected empty plan to be written to plan file, got: %s", spew.Sdump(plan))
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}
if plan.Backend.Type == "" || plan.Backend.Config == nil {
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t.Fatal("should have backend info")
}
if !reflect.DeepEqual(plan.Backend, dataState.Backend) {
t.Fatalf("wrong backend config in plan\ngot: %swant: %s", spew.Sdump(plan.Backend), spew.Sdump(dataState.Backend))
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}
}
func TestPlan_refreshFalse(t *testing.T) {
tmp, cwd := testCwd(t)
defer testFixCwd(t, tmp, cwd)
p := planFixtureProvider()
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ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
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}
args := []string{
"-refresh=false",
testFixturePath("plan"),
}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
if p.ReadResourceCalled {
t.Fatal("ReadResource should not have been called")
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}
}
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func TestPlan_state(t *testing.T) {
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originalState := testState()
statePath := testStateFile(t, originalState)
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p := planFixtureProvider()
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ui := new(cli.MockUi)
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c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
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}
args := []string{
"-state", statePath,
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testFixturePath("plan"),
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}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
// Verify that the provider was called with the existing state
actual := p.PlanResourceChangeRequest.PriorState
expected := cty.ObjectVal(map[string]cty.Value{
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"id": cty.StringVal("bar"),
"ami": cty.NullVal(cty.String),
"network_interface": cty.NullVal(cty.List(cty.Object(map[string]cty.Type{
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"device_index": cty.String,
"description": cty.String,
}))),
})
if !expected.RawEquals(actual) {
t.Fatalf("wrong prior state\ngot: %#v\nwant: %#v", actual, expected)
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}
}
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func TestPlan_stateDefault(t *testing.T) {
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originalState := testState()
statePath := testStateFile(t, originalState)
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// Change to that directory
cwd, err := os.Getwd()
if err != nil {
t.Fatalf("err: %s", err)
}
if err := os.Chdir(filepath.Dir(statePath)); err != nil {
t.Fatalf("err: %s", err)
}
defer os.Chdir(cwd)
p := planFixtureProvider()
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ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
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}
args := []string{
"-state", statePath,
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testFixturePath("plan"),
}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
// Verify that the provider was called with the existing state
actual := p.PlanResourceChangeRequest.PriorState
expected := cty.ObjectVal(map[string]cty.Value{
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"id": cty.StringVal("bar"),
"ami": cty.NullVal(cty.String),
"network_interface": cty.NullVal(cty.List(cty.Object(map[string]cty.Type{
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"device_index": cty.String,
"description": cty.String,
}))),
})
if !expected.RawEquals(actual) {
t.Fatalf("wrong prior state\ngot: %#v\nwant: %#v", actual, expected)
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}
}
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func TestPlan_validate(t *testing.T) {
// This is triggered by not asking for input so we have to set this to false
test = false
defer func() { test = true }()
cwd, err := os.Getwd()
if err != nil {
t.Fatalf("err: %s", err)
}
if err := os.Chdir(testFixturePath("plan-invalid")); err != nil {
t.Fatalf("err: %s", err)
}
defer os.Chdir(cwd)
p := testProvider()
p.GetSchemaReturn = &terraform.ProviderSchema{
ResourceTypes: map[string]*configschema.Block{
"test_instance": {
Attributes: map[string]*configschema.Attribute{
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"id": {Type: cty.String, Optional: true, Computed: true},
},
},
},
}
p.PlanResourceChangeFn = func(req providers.PlanResourceChangeRequest) providers.PlanResourceChangeResponse {
return providers.PlanResourceChangeResponse{
PlannedState: req.ProposedNewState,
}
}
ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
}
args := []string{}
if code := c.Run(args); code != 1 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
actual := ui.ErrorWriter.String()
if want := "Error: Invalid count argument"; !strings.Contains(actual, want) {
t.Fatalf("unexpected error output\ngot:\n%s\n\nshould contain: %s", actual, want)
}
}
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func TestPlan_vars(t *testing.T) {
tmp, cwd := testCwd(t)
defer testFixCwd(t, tmp, cwd)
p := planVarsFixtureProvider()
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ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
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},
}
actual := ""
p.DiffFn = func(
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info *terraform.InstanceInfo,
s *terraform.InstanceState,
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c *terraform.ResourceConfig) (*terraform.InstanceDiff, error) {
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if v, ok := c.Config["value"]; ok {
actual = v.(string)
}
return nil, nil
}
args := []string{
"-var", "foo=bar",
testFixturePath("plan-vars"),
}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
if actual != "bar" {
t.Fatal("didn't work")
}
}
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func TestPlan_varsUnset(t *testing.T) {
tmp, cwd := testCwd(t)
defer testFixCwd(t, tmp, cwd)
// Disable test mode so input would be asked
test = false
defer func() { test = true }()
defaultInputReader = bytes.NewBufferString("bar\n")
p := planVarsFixtureProvider()
ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
}
args := []string{
testFixturePath("plan-vars"),
}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
}
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func TestPlan_varFile(t *testing.T) {
tmp, cwd := testCwd(t)
defer testFixCwd(t, tmp, cwd)
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varFilePath := testTempFile(t)
if err := ioutil.WriteFile(varFilePath, []byte(planVarFile), 0644); err != nil {
t.Fatalf("err: %s", err)
}
p := planVarsFixtureProvider()
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ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
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},
}
actual := ""
p.DiffFn = func(
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info *terraform.InstanceInfo,
s *terraform.InstanceState,
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c *terraform.ResourceConfig) (*terraform.InstanceDiff, error) {
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if v, ok := c.Config["value"]; ok {
actual = v.(string)
}
return nil, nil
}
args := []string{
"-var-file", varFilePath,
testFixturePath("plan-vars"),
}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
if actual != "bar" {
t.Fatal("didn't work")
}
}
func TestPlan_varFileDefault(t *testing.T) {
varFileDir := testTempDir(t)
varFilePath := filepath.Join(varFileDir, "terraform.tfvars")
if err := ioutil.WriteFile(varFilePath, []byte(planVarFile), 0644); err != nil {
t.Fatalf("err: %s", err)
}
cwd, err := os.Getwd()
if err != nil {
t.Fatalf("err: %s", err)
}
if err := os.Chdir(varFileDir); err != nil {
t.Fatalf("err: %s", err)
}
defer os.Chdir(cwd)
p := planVarsFixtureProvider()
ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
}
actual := ""
p.DiffFn = func(
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info *terraform.InstanceInfo,
s *terraform.InstanceState,
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c *terraform.ResourceConfig) (*terraform.InstanceDiff, error) {
if v, ok := c.Config["value"]; ok {
actual = v.(string)
}
return nil, nil
}
args := []string{
testFixturePath("plan-vars"),
}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
if actual != "bar" {
t.Fatal("didn't work")
}
}
func TestPlan_detailedExitcode(t *testing.T) {
cwd, err := os.Getwd()
if err != nil {
t.Fatalf("err: %s", err)
}
if err := os.Chdir(testFixturePath("plan")); err != nil {
t.Fatalf("err: %s", err)
}
defer os.Chdir(cwd)
p := planFixtureProvider()
ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
}
args := []string{"-detailed-exitcode"}
if code := c.Run(args); code != 2 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
}
func TestPlan_detailedExitcode_emptyDiff(t *testing.T) {
cwd, err := os.Getwd()
if err != nil {
t.Fatalf("err: %s", err)
}
if err := os.Chdir(testFixturePath("plan-emptydiff")); err != nil {
t.Fatalf("err: %s", err)
}
defer os.Chdir(cwd)
p := testProvider()
ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
},
}
args := []string{"-detailed-exitcode"}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
}
func TestPlan_shutdown(t *testing.T) {
cancelled := make(chan struct{})
shutdownCh := make(chan struct{})
p := testProvider()
ui := new(cli.MockUi)
c := &PlanCommand{
Meta: Meta{
testingOverrides: metaOverridesForProvider(p),
Ui: ui,
ShutdownCh: shutdownCh,
},
}
p.StopFn = func() error {
close(cancelled)
return nil
}
var once sync.Once
p.DiffFn = func(
*terraform.InstanceInfo,
*terraform.InstanceState,
*terraform.ResourceConfig) (*terraform.InstanceDiff, error) {
once.Do(func() {
shutdownCh <- struct{}{}
})
// Because of the internal lock in the MockProvider, we can't
// coordinate directly with the calling of Stop, and making the
// MockProvider concurrent is disruptive to a lot of existing tests.
// Wait here a moment to help make sure the main goroutine gets to the
// Stop call before we exit, or the plan may finish before it can be
// canceled.
time.Sleep(200 * time.Millisecond)
return &terraform.InstanceDiff{
Attributes: map[string]*terraform.ResourceAttrDiff{
"ami": &terraform.ResourceAttrDiff{
New: "bar",
},
},
}, nil
}
p.GetSchemaReturn = &terraform.ProviderSchema{
ResourceTypes: map[string]*configschema.Block{
"test_instance": {
Attributes: map[string]*configschema.Attribute{
"ami": {Type: cty.String, Optional: true},
},
},
},
}
code := c.Run([]string{
// Unfortunately it seems like this test can inadvertently pick up
// leftover state from other tests without this. Ideally we should
// find which test is leaving a terraform.tfstate behind and stop it
// doing that, but this will stop this test flapping for now.
"-state=nonexistent.tfstate",
testFixturePath("apply-shutdown"),
})
if code != 1 {
// FIXME: we should be able to avoid the error during evaluation
// the early exit isn't caught before the interpolation is evaluated
t.Fatalf("wrong exit code %d; want 1\noutput:\n%s", code, ui.OutputWriter.String())
}
select {
case <-cancelled:
default:
t.Fatal("command not cancelled")
}
}
// planFixtureSchema returns a schema suitable for processing the
// configuration in test-fixtures/plan . This schema should be
// assigned to a mock provider named "test".
func planFixtureSchema() *terraform.ProviderSchema {
return &terraform.ProviderSchema{
ResourceTypes: map[string]*configschema.Block{
"test_instance": {
Attributes: map[string]*configschema.Attribute{
"id": {Type: cty.String, Optional: true, Computed: true},
"ami": {Type: cty.String, Optional: true},
},
BlockTypes: map[string]*configschema.NestedBlock{
"network_interface": {
Nesting: configschema.NestingList,
Block: configschema.Block{
Attributes: map[string]*configschema.Attribute{
"device_index": {Type: cty.String, Optional: true},
"description": {Type: cty.String, Optional: true},
},
},
},
},
},
},
}
}
// planFixtureProvider returns a mock provider that is configured for basic
// operation with the configuration in test-fixtures/plan. This mock has
// GetSchemaReturn and PlanResourceChangeFn populated, with the plan
// step just passing through the new object proposed by Terraform Core.
func planFixtureProvider() *terraform.MockProvider {
p := testProvider()
p.GetSchemaReturn = planFixtureSchema()
p.PlanResourceChangeFn = func(req providers.PlanResourceChangeRequest) providers.PlanResourceChangeResponse {
return providers.PlanResourceChangeResponse{
PlannedState: req.ProposedNewState,
}
}
return p
}
// planVarsFixtureSchema returns a schema suitable for processing the
// configuration in test-fixtures/plan-vars . This schema should be
// assigned to a mock provider named "test".
func planVarsFixtureSchema() *terraform.ProviderSchema {
return &terraform.ProviderSchema{
ResourceTypes: map[string]*configschema.Block{
"test_instance": {
Attributes: map[string]*configschema.Attribute{
"id": {Type: cty.String, Optional: true, Computed: true},
"value": {Type: cty.String, Optional: true},
},
},
},
}
}
// planVarsFixtureProvider returns a mock provider that is configured for basic
// operation with the configuration in test-fixtures/plan-vars. This mock has
// GetSchemaReturn and PlanResourceChangeFn populated, with the plan
// step just passing through the new object proposed by Terraform Core.
func planVarsFixtureProvider() *terraform.MockProvider {
p := testProvider()
p.GetSchemaReturn = planVarsFixtureSchema()
p.PlanResourceChangeFn = func(req providers.PlanResourceChangeRequest) providers.PlanResourceChangeResponse {
return providers.PlanResourceChangeResponse{
PlannedState: req.ProposedNewState,
}
}
return p
}
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const planVarFile = `
foo = "bar"
`
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const testPlanNoStateStr = `
<not created>
`
const testPlanStateStr = `
ID = bar
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Tainted = false
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`
const testPlanStateDefaultStr = `
ID = bar
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Tainted = false
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`