Setup acceptance tests

Makefile

@@ -34,5 +34,9 @@ vet:
 test: deps
 	go test ./...
 
+.PHONY: testacc
+testacc: deps
+	TEST_ACC=1 go test -count=1 ./...
+
 .PHONY: check
 check: lint vet test build

tfexec/executor.go

@@ -66,7 +66,7 @@ func (e *executor) NewCommandContext(ctx context.Context, name string, args ...s
 // Run executes a command.
 func (e *executor) Run(cmd Command) error {
 	err := cmd.Run()
-	log.Printf("[DEBUG] run command: %s", spew.Sdump(cmd))
+	log.Printf("[DEBUG] run command in %s: %s ", e.dir, spew.Sdump(cmd))
 	if err != nil {
 		log.Printf("[DEBUG] failed to run command: %s", spew.Sdump(err))
 		if osExecErr, ok := err.(*exec.ExitError); ok {

tfexec/terraform_init_test.go

@@ -83,3 +83,18 @@ func TestTerraformCLIInit(t *testing.T) {
 		})
 	}
 }
+
+func TestAccTerraformCLIInit(t *testing.T) {
+	if !isAcceptanceTestEnabled() {
+		t.Skip("skip acceptance tests")
+	}
+
+	source := `resource "null_resource" "foo" {}`
+	e := setupTestAcc(t, source)
+	terraformCLI := NewTerraformCLI(e)
+
+	err := terraformCLI.Init(context.Background(), "", "-input=false", "-no-color")
+	if err != nil {
+		t.Fatalf("failed to run terraform init: %s", err)
+	}
+}

tfexec/terraform_test.go

@@ -2,9 +2,58 @@ package tfexec
 
 import (
 	"context"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
 	"testing"
 )
 
+// setupTestAcc is a common setup helper for acceptance tests.
+func setupTestAcc(t *testing.T, source string) Executor {
+	workDir, err := setupTestWorkDir(source)
+	if err != nil {
+		t.Fatalf("failed to setup work dir: %s", err)
+	}
+	t.Cleanup(func() { os.RemoveAll(workDir) })
+
+	e := NewExecutor(workDir, os.Environ())
+	if err := setupTestPluginCacheDir(e); err != nil {
+		t.Fatalf("failed to set plugin cache dir: %s", err)
+	}
+
+	return e
+}
+
+// isAcceptanceTestEnabled returns true if acceptance tests should be run.
+func isAcceptanceTestEnabled() bool {
+	return os.Getenv("TEST_ACC") == "1"
+}
+
+// setupTestWorkDir creates temporary working directory with a given source for testing.
+func setupTestWorkDir(source string) (string, error) {
+	workDir, err := ioutil.TempDir("", "workDir")
+	if err != nil {
+		return "", fmt.Errorf("failed to create work dir: %s", err)
+	}
+
+	if err := ioutil.WriteFile(filepath.Join(workDir, "main.tf"), []byte(source), 0644); err != nil {
+		os.RemoveAll(workDir)
+		return "", fmt.Errorf("failed to create main.tf: %s", err)
+	}
+	return workDir, nil
+}
+
+// setupTestPluginCacheDir sets TF_PLUGIN_CACHE_DIR to a given executor.
+func setupTestPluginCacheDir(e Executor) error {
+	pwd, err := os.Getwd()
+	if err != nil {
+		return fmt.Errorf("failed to get current dir: %s", err)
+	}
+	e.AppendEnv("TF_PLUGIN_CACHE_DIR", filepath.Join(pwd, "tmp/plugin-cache"))
+	return nil
+}
+
 func TestTerraformCLIRun(t *testing.T) {
 	cases := []struct {
 		desc         string

tfexec/terraform_version_test.go

@@ -2,6 +2,8 @@ package tfexec
 
 import (
 	"context"
+	"fmt"
+	"os"
 	"testing"
 )
 
@@ -70,3 +72,20 @@ is 0.12.29. You can update by downloading from https://www.terraform.io/download
 		})
 	}
 }
+
+func TestAccTerraformCLIVersion(t *testing.T) {
+	if !isAcceptanceTestEnabled() {
+		t.Skip("skip acceptance tests")
+	}
+
+	e := NewExecutor("", os.Environ())
+	terraformCLI := NewTerraformCLI(e)
+	got, err := terraformCLI.Version(context.Background())
+	if err != nil {
+		t.Fatalf("failed to run terraform version: %s", err)
+	}
+	if got == "" {
+		t.Error("failed to parse terraform version")
+	}
+	fmt.Printf("got = %s\n", got)
+}