Added few tests Terraform struct

configuration.mock

@@ -0,0 +1,11 @@
+//Mock Terraform Configuration File
+resource "aws_eip" "nat" {
+  vpc   = true
+  count = "${length(var.public_subnets)}"
+}
+
+resource "aws_nat_gateway" "nat" {
+  allocation_id = "${element(aws_eip.nat.*.id, count.index)}"
+  subnet_id     = "${element(aws_subnet.public.*.id, count.index)}"
+  count         = "${length(var.public_subnets)}"
+}

file_utils.go

@@ -12,12 +12,11 @@ func getAllFiles(ext string) ([]string, error) {
 	checkError(err)
 	var files []string
 	log.Infof("Finding files in %q directory", dir)
-	files, err = filepath.Glob(tfFileExt)
+	files, err = filepath.Glob(ext)
 	checkError(err)
 
 	if len(files) == 0 {
-		log.Infof("No files with .tf extensions found in %q", dir)
-		os.Exit(0)
+		log.Infof("No files with %q extensions found in %q", ext, dir)
 	}
 	return files, nil
 }

generator.go

@@ -42,6 +42,10 @@ func main() {
 	}
 
 	tfFiles, err := getAllFiles(tfFileExt)
+	if len(tfFiles) == 0 {
+		log.Warn("No terraform files to proceed, exiting")
+		os.Exit(0)
+	}
 	checkError(err)
 	var wg sync.WaitGroup
 	messages := make(chan string)

generator_test.go

@@ -1,11 +1,13 @@
 package main
 
 import (
+	"bufio"
 	"os"
 	"testing"
 )
 
-var mockFile = "mock.tf"
+var mockFile = "tf_configuration.mock"
+var testExtFile = "*.mock"
 
 func TestContainsElement(t *testing.T) {
 	testSlice := []string{"Terraform", "Puppet", "Ansible"}
@@ -15,13 +17,32 @@ func TestContainsElement(t *testing.T) {
 }
 
 func TestGetAllFiles(t *testing.T) {
-	var file, err = os.Create(mockFile)
-	checkError(err)
-	defer file.Close()
-	files, err := getAllFiles(tfFileExt)
+	files, err := getAllFiles(testExtFile)
 	checkError(err)
 	if len(files) == 0 {
 		t.Error("Should found at least one file")
 	}
-	defer os.Remove(mockFile)
+}
+
+func TestMatchVariable(t *testing.T) {
+	ter := &terraformVars{}
+	var messages []string
+
+	file, err := getAllFiles(testExtFile)
+	checkError(err)
+
+	fileHandle, _ := os.Open(file[0])
+	defer fileHandle.Close()
+
+	fileScanner := bufio.NewScanner(fileHandle)
+	for fileScanner.Scan() {
+		messages = append(messages, fileScanner.Text())
+	}
+	for _, text := range messages {
+		ter.matchVarPref(text, varPrefix)
+	}
+	if len(ter.Variables) != 1 {
+		t.Errorf("Should return one variable. but returned %d", len(ter.Variables))
+	}
+
 }