remove exposures of testing.T from other places in SDK

move interface down a package to prevent a circular import

helper/resource/testing.go

@@ -12,13 +12,14 @@ import (
 	"regexp"
 	"strings"
 	"syscall"
-	"testing"
+	gotesting "testing"
 
 	"github.com/hashicorp/go-multierror"
 	"github.com/hashicorp/logutils"
 
 	"github.com/hashicorp/terraform-plugin-sdk/v2/acctest"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/logging"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource/testing"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/internal/addrs"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/internal/diagutils"
@@ -86,7 +87,7 @@ func AddTestSweepers(name string, s *Sweeper) {
 	sweeperFuncs[name] = s
 }
 
-func TestMain(m *testing.M) {
+func TestMain(m testing.M) {
 	flag.Parse()
 	if *flagSweep != "" {
 		// parse flagSweep contents for regions to run
@@ -460,7 +461,7 @@ type TestStep struct {
 // Set to a file mask in sprintf format where %s is test name
 const envLogPathMask = "TF_LOG_PATH_MASK"
 
-func logOutput(t TestT) (logOutput io.Writer, err error) {
+func logOutput(t testing.T) (logOutput io.Writer, err error) {
 	logOutput = ioutil.Discard
 
 	logLevel := logging.LogLevel()
@@ -506,7 +507,7 @@ func logOutput(t TestT) (logOutput io.Writer, err error) {
 // Tests will fail if they do not properly handle conditions to allow multiple
 // tests to occur against the same resource or service (e.g. random naming).
 // All other requirements of the Test function also apply to this function.
-func ParallelTest(t TestT, c TestCase) {
+func ParallelTest(t testing.T, c TestCase) {
 	t.Parallel()
 	Test(t, c)
 }
@@ -521,7 +522,7 @@ func ParallelTest(t TestT, c TestCase) {
 // the "-test.v" flag) is set. Because some acceptance tests take quite
 // long, we require the verbose flag so users are able to see progress
 // output.
-func Test(t TestT, c TestCase) {
+func Test(t testing.T, c TestCase) {
 	// We only run acceptance tests if an env var is set because they're
 	// slow and generally require some outside configuration. You can opt out
 	// of this with OverrideEnvVar on individual TestCases.
@@ -539,7 +540,7 @@ func Test(t TestT, c TestCase) {
 	log.SetOutput(logWriter)
 
 	// We require verbose mode so that the user knows what is going on.
-	if !testing.Verbose() && !c.IsUnitTest {
+	if !gotesting.Verbose() && !c.IsUnitTest {
 		t.Fatal("Acceptance tests must be run with the -v flag on tests")
 	}
 
@@ -594,7 +595,7 @@ func testProviderConfig(c TestCase) string {
 // UnitTest is a helper to force the acceptance testing harness to run in the
 // normal unit test suite. This should only be used for resource that don't
 // have any external dependencies.
-func UnitTest(t TestT, c TestCase) {
+func UnitTest(t testing.T, c TestCase) {
 	c.IsUnitTest = true
 	Test(t, c)
 }
@@ -980,22 +981,6 @@ func TestMatchOutput(name string, r *regexp.Regexp) TestCheckFunc {
 	}
 }
 
-// TestT is the interface used to handle the test lifecycle of a test.
-//
-// Users should just use a *testing.T object, which implements this.
-type TestT interface {
-	Error(args ...interface{})
-	FailNow()
-	Fatal(args ...interface{})
-	Fatalf(format string, args ...interface{})
-	Helper()
-	Log(args ...interface{})
-	Name() string
-	Parallel()
-	Skip(args ...interface{})
-	SkipNow()
-}
-
 // modulePrimaryInstanceState returns the instance state for the given resource
 // name in a ModuleState
 func modulePrimaryInstanceState(s *terraform.State, ms *terraform.ModuleState, name string) (*terraform.InstanceState, error) {

helper/resource/testing/testing.go

@@ -0,0 +1,24 @@
+// Package testing aims to expose interfaces that mirror go's testing package
+// this prevents go's testing package from being imported or exposed to
+// importers of the SDK
+package testing
+
+// T is the interface used to handle the test lifecycle of a test.
+//
+// Users should just use a *testing.T object, which implements this.
+type T interface {
+	Error(args ...interface{})
+	FailNow()
+	Fatal(args ...interface{})
+	Fatalf(format string, args ...interface{})
+	Helper()
+	Log(args ...interface{})
+	Name() string
+	Parallel()
+	Skip(args ...interface{})
+	SkipNow()
+}
+
+type M interface {
+	Run() int
+}

helper/resource/testing_new.go

@@ -11,11 +11,12 @@ import (
 	tftest "github.com/hashicorp/terraform-plugin-test"
 
 	"github.com/hashicorp/terraform-plugin-sdk/v2/acctest"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource/testing"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/terraform"
 )
 
-func runPostTestDestroy(t TestT, c TestCase, wd *tftest.WorkingDir) error {
+func runPostTestDestroy(t testing.T, c TestCase, wd *tftest.WorkingDir) error {
 	wd.RequireDestroy(t)
 
 	if c.CheckDestroy != nil {
@@ -29,7 +30,7 @@ func runPostTestDestroy(t TestT, c TestCase, wd *tftest.WorkingDir) error {
 	return nil
 }
 
-func RunNewTest(t TestT, c TestCase, providers map[string]*schema.Provider) {
+func RunNewTest(t testing.T, c TestCase, providers map[string]*schema.Provider) {
 	spewConf := spew.NewDefaultConfig()
 	spewConf.SortKeys = true
 	wd := acctest.TestHelper.RequireNewWorkingDir(t)
@@ -101,7 +102,7 @@ func RunNewTest(t TestT, c TestCase, providers map[string]*schema.Provider) {
 	}
 }
 
-func getState(t TestT, wd *tftest.WorkingDir) *terraform.State {
+func getState(t testing.T, wd *tftest.WorkingDir) *terraform.State {
 	jsonState := wd.RequireState(t)
 	state, err := shimStateFromJson(jsonState)
 	if err != nil {
@@ -131,7 +132,7 @@ func planIsEmpty(plan *tfjson.Plan) bool {
 	return true
 }
 
-func testIDRefresh(c TestCase, t TestT, wd *tftest.WorkingDir, step TestStep, r *terraform.ResourceState) error {
+func testIDRefresh(c TestCase, t testing.T, wd *tftest.WorkingDir, step TestStep, r *terraform.ResourceState) error {
 	spewConf := spew.NewDefaultConfig()
 	spewConf.SortKeys = true
 

helper/resource/testing_new_config.go

@@ -4,10 +4,11 @@ import (
 	"github.com/davecgh/go-spew/spew"
 	tftest "github.com/hashicorp/terraform-plugin-test"
 
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource/testing"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/terraform"
 )
 
-func testStepNewConfig(t TestT, c TestCase, wd *tftest.WorkingDir, step TestStep) error {
+func testStepNewConfig(t testing.T, c TestCase, wd *tftest.WorkingDir, step TestStep) error {
 	spewConf := spew.NewDefaultConfig()
 	spewConf.SortKeys = true
 

helper/resource/testing_new_import_state.go

@@ -8,12 +8,13 @@ import (
 	tftest "github.com/hashicorp/terraform-plugin-test"
 
 	"github.com/hashicorp/terraform-plugin-sdk/v2/acctest"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource/testing"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/internal/addrs"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/terraform"
 )
 
-func testStepNewImportState(t TestT, c TestCase, wd *tftest.WorkingDir, step TestStep, cfg string) error {
+func testStepNewImportState(t testing.T, c TestCase, wd *tftest.WorkingDir, step TestStep, cfg string) error {
 	spewConf := spew.NewDefaultConfig()
 	spewConf.SortKeys = true
 

helper/schema/testing.go

@@ -2,14 +2,14 @@ package schema
 
 import (
 	"context"
-	"testing"
 
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource/testing"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/terraform"
 )
 
 // TestResourceDataRaw creates a ResourceData from a raw configuration map.
 func TestResourceDataRaw(
-	t *testing.T, schema map[string]*Schema, raw map[string]interface{}) *ResourceData {
+	t testing.T, schema map[string]*Schema, raw map[string]interface{}) *ResourceData {
 	t.Helper()
 
 	c := terraform.NewResourceConfigRaw(raw)

helper/validation/testing.go

@@ -2,8 +2,8 @@ package validation
 
 import (
 	"regexp"
-	"testing"
 
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource/testing"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
 
@@ -13,7 +13,7 @@ type testCase struct {
 	expectedErr *regexp.Regexp
 }
 
-func runTestCases(t *testing.T, cases []testCase) {
+func runTestCases(t testing.T, cases []testCase) {
 	matchErr := func(errs []error, r *regexp.Regexp) bool {
 		// err must match one provided
 		for _, err := range errs {