From c62e774709ccb747227c685e18a0fbe79ec3ba41 Mon Sep 17 00:00:00 2001
From: Achilleas Triantafyllou <achilleas.triantafyllou@citrix.com>
Date: Tue, 13 Apr 2021 00:56:50 +0300
Subject: [PATCH] Add terraform validate functions

---
 modules/terraform/validate.go      | 39 ++++++++++++++++++++++++++++++
 modules/terraform/validate_test.go | 37 ++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+)
 create mode 100644 modules/terraform/validate.go
 create mode 100644 modules/terraform/validate_test.go

diff --git a/modules/terraform/validate.go b/modules/terraform/validate.go
new file mode 100644
index 000000000..3ce200846
--- /dev/null
+++ b/modules/terraform/validate.go
@@ -0,0 +1,39 @@
+package terraform
+
+import (
+	"github.com/gruntwork-io/terratest/modules/testing"
+	"github.com/stretchr/testify/require"
+)
+
+// Validate calls terraform validate and returns stdout/stderr.
+func Validate(t testing.TestingT, options *Options) string {
+	out, err := ValidateE(t, options)
+	require.NoError(t, err)
+	return out
+}
+
+// ValidateE calls terraform validate and returns stdout/stderr.
+func ValidateE(t testing.TestingT, options *Options) (string, error) {
+	return RunTerraformCommandE(t, options, FormatArgs(options, "validate")...)
+}
+
+// InitAndValidate runs terraform init and validate with the given options and returns stdout/stderr from the validate command.
+// This will fail the test if there is an error in the command.
+func InitAndValidate(t testing.TestingT, options *Options) string {
+	out, err := InitAndValidateE(t, options)
+	require.NoError(t, err)
+	return out
+}
+
+// InitAndValidateE runs terraform init and validate with the given options and returns stdout/stderr from the validate command.
+func InitAndValidateE(t testing.TestingT, options *Options) (string, error) {
+	if _, err := InitE(t, options); err != nil {
+		return "", err
+	}
+
+	if _, err := GetE(t, options); err != nil {
+		return "", err
+	}
+
+	return ValidateE(t, options)
+}
diff --git a/modules/terraform/validate_test.go b/modules/terraform/validate_test.go
new file mode 100644
index 000000000..430fb2eb8
--- /dev/null
+++ b/modules/terraform/validate_test.go
@@ -0,0 +1,37 @@
+package terraform
+
+import (
+	"testing"
+
+	"github.com/gruntwork-io/terratest/modules/files"
+	"github.com/stretchr/testify/require"
+)
+
+func TestInitAndValidateWithNoError(t *testing.T) {
+	t.Parallel()
+
+	testFolder, err := files.CopyTerraformFolderToTemp("../../test/fixtures/terraform-basic-configuration", t.Name())
+	require.NoError(t, err)
+
+	options := &Options{
+		TerraformDir: testFolder,
+	}
+
+	out := InitAndValidate(t, options)
+	require.Contains(t, out, "The configuration is valid")
+}
+
+func TestInitAndValidateWithError(t *testing.T) {
+	t.Parallel()
+
+	testFolder, err := files.CopyTerraformFolderToTemp("../../test/fixtures/terraform-with-plan-error", t.Name())
+	require.NoError(t, err)
+
+	options := &Options{
+		TerraformDir: testFolder,
+	}
+
+	out, err := InitAndValidateE(t, options)
+	require.Error(t, err)
+	require.Contains(t, out, "Reference to undeclared input variable")
+}