terraform/backend/local/testing.go

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package local
import (
"io/ioutil"
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"os"
"path/filepath"
"testing"
"github.com/hashicorp/terraform/backend"
"github.com/hashicorp/terraform/state"
"github.com/hashicorp/terraform/terraform"
"github.com/hashicorp/terraform/tfdiags"
)
// TestLocal returns a configured Local struct with temporary paths and
// in-memory ContextOpts.
//
// No operations will be called on the returned value, so you can still set
// public fields without any locks.
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func TestLocal(t *testing.T) (*Local, func()) {
t.Helper()
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tempDir := testTempDir(t)
var local *Local
local = &Local{
StatePath: filepath.Join(tempDir, "state.tfstate"),
StateOutPath: filepath.Join(tempDir, "state.tfstate"),
StateBackupPath: filepath.Join(tempDir, "state.tfstate.bak"),
StateWorkspaceDir: filepath.Join(tempDir, "state.tfstate.d"),
ContextOpts: &terraform.ContextOpts{},
ShowDiagnostics: func(vals ...interface{}) {
var diags tfdiags.Diagnostics
diags = diags.Append(vals...)
for _, diag := range diags {
t.Log(diag.Description().Summary)
if local.CLI != nil {
local.CLI.Error(diag.Description().Summary)
}
}
},
}
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cleanup := func() {
if err := os.RemoveAll(tempDir); err != nil {
t.Fatal("error clecanup up test:", err)
}
}
return local, cleanup
}
// TestLocalProvider modifies the ContextOpts of the *Local parameter to
// have a provider with the given name.
func TestLocalProvider(t *testing.T, b *Local, name string) *terraform.MockResourceProvider {
// Build a mock resource provider for in-memory operations
p := new(terraform.MockResourceProvider)
p.DiffReturn = &terraform.InstanceDiff{}
p.RefreshFn = func(
info *terraform.InstanceInfo,
s *terraform.InstanceState) (*terraform.InstanceState, error) {
return s, nil
}
p.ResourcesReturn = []terraform.ResourceType{
terraform.ResourceType{
Name: "test_instance",
},
}
// Initialize the opts
if b.ContextOpts == nil {
b.ContextOpts = &terraform.ContextOpts{}
}
// Setup our provider
b.ContextOpts.ProviderResolver = terraform.ResourceProviderResolverFixed(
map[string]terraform.ResourceProviderFactory{
name: terraform.ResourceProviderFactoryFixed(p),
},
)
return p
}
// TestNewLocalSingle is a factory for creating a TestLocalSingleState.
// This function matches the signature required for backend/init.
func TestNewLocalSingle() backend.Backend {
return &TestLocalSingleState{Local: &Local{}}
}
// TestLocalSingleState is a backend implementation that wraps Local
// and modifies it to only support single states (returns
// ErrNamedStatesNotSupported for multi-state operations).
//
// This isn't an actual use case, this is exported just to provide a
// easy way to test that behavior.
type TestLocalSingleState struct {
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*Local
}
func (b *TestLocalSingleState) State(name string) (state.State, error) {
if name != backend.DefaultStateName {
return nil, backend.ErrNamedStatesNotSupported
}
return b.Local.State(name)
}
func (b *TestLocalSingleState) States() ([]string, error) {
return nil, backend.ErrNamedStatesNotSupported
}
func (b *TestLocalSingleState) DeleteState(string) error {
return backend.ErrNamedStatesNotSupported
}
// TestNewLocalNoDefault is a factory for creating a TestLocalNoDefaultState.
// This function matches the signature required for backend/init.
func TestNewLocalNoDefault() backend.Backend {
return &TestLocalNoDefaultState{Local: &Local{}}
}
// TestLocalNoDefaultState is a backend implementation that wraps
// Local and modifies it to support named states, but not the
// default state. It returns ErrDefaultStateNotSupported when the
// DefaultStateName is used.
type TestLocalNoDefaultState struct {
*Local
}
func (b *TestLocalNoDefaultState) State(name string) (state.State, error) {
if name == backend.DefaultStateName {
return nil, backend.ErrDefaultStateNotSupported
}
return b.Local.State(name)
}
func (b *TestLocalNoDefaultState) States() ([]string, error) {
states, err := b.Local.States()
if err != nil {
return nil, err
}
filtered := states[:0]
for _, name := range states {
if name != backend.DefaultStateName {
filtered = append(filtered, name)
}
}
return filtered, nil
}
func (b *TestLocalNoDefaultState) DeleteState(name string) error {
if name == backend.DefaultStateName {
return backend.ErrDefaultStateNotSupported
}
return b.Local.DeleteState(name)
}
func testTempDir(t *testing.T) string {
d, err := ioutil.TempDir("", "tf")
if err != nil {
t.Fatalf("err: %s", err)
}
return d
}