Merge pull request #263 from imnitin28/testcases-for-IaC-codes

2022/Days/IaC/Terratest/examples/instance.tf

@@ -0,0 +1,12 @@
+resource "aws_instance" "example" {
+  ami           = var.AMIS[var.AWS_REGION]
+  instance_type = "t2.micro"
+  vpc_security_group_ids = [aws_security_group.instance.id]
+
+  # When the instance boots, start a web server on port 8080 that responds with "Hello, World!".
+  user_data = <<EOF
+#!/bin/bash
+echo "Hello, World!" > index.html
+nohup busybox httpd -f -p 8080 &
+EOF
+}

2022/Days/IaC/Terratest/examples/output.tf

@@ -0,0 +1,4 @@
+# Output the instance's public IP address.
+output "public_ip" {
+  value = aws_instance.example.public_ip
+}

2022/Days/IaC/Terratest/examples/provider.tf

@@ -0,0 +1,5 @@
+provider "aws" {
+  access_key = var.AWS_ACCESS_KEY
+  secret_key = var.AWS_SECRET_KEY
+  region     = var.AWS_REGION
+}

2022/Days/IaC/Terratest/examples/securitygroup.tf

@@ -0,0 +1,9 @@
+# Allow the instance to receive requests on port 8080.
+resource "aws_security_group" "instance" {
+  ingress {
+    from_port   = 8080
+    to_port     = 8080
+    protocol    = "tcp"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+}

2022/Days/IaC/Terratest/examples/terraform.tfvars

@@ -0,0 +1,3 @@
+AWS_ACCESS_KEY = "XXXX"
+AWS_SECRET_KEY = "XXXXXXXX"
+AWS_REGION="ap-south-1"

2022/Days/IaC/Terratest/examples/vars.tf

@@ -0,0 +1,16 @@
+variable "AWS_ACCESS_KEY" {
+}
+
+variable "AWS_SECRET_KEY" {
+}
+
+variable "AWS_REGION" {
+  default = "ap-south-1"
+}
+
+variable "AMIS" {
+  type = map(string)
+  default = {
+    ap-south-1 = "ami-0860c9429baba6ad2"
+  }
+}

2022/Days/IaC/Terratest/examples/versions.tf

@@ -0,0 +1,3 @@
+terraform {
+  required_version = ">= 0.12.26"
+}

2022/Days/IaC/Terratest/test/terraform_test.go

@@ -0,0 +1,34 @@
+package test
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	http_helper "github.com/gruntwork-io/terratest/modules/http-helper"
+
+	"github.com/gruntwork-io/terratest/modules/terraform"
+)
+
+func TestTerraformAwsHelloWorldExample(t *testing.T) {
+	t.Parallel()
+
+	/*Construct the terraform options with default retryable errors to handle the most common retryable errors in terraform testing. */
+	terraformOptions := terraform.WithDefaultRetryableErrors(t, &terraform.Options{
+		/* The path to where our Terraform code is located */
+		TerraformDir: "../examples",
+	})
+
+	/* At the end of the test, run `terraform destroy` to clean up any resources that were created.*/
+	defer terraform.Destroy(t, terraformOptions)
+
+	/* Run `terraform init` and `terraform apply`. Fail the test if there are any errors. */
+	terraform.InitAndApply(t, terraformOptions)
+
+	/* Run `terraform output` to get the IP of the instance */
+	publicIp := terraform.Output(t, terraformOptions, "public_ip")
+
+	/* Make an HTTP request to the instance and make sure we get back a 200 OK with the body "Hello, World!" */
+	url := fmt.Sprintf("http://%s:8080", publicIp)
+	http_helper.HttpGetWithRetry(t, url, nil, 200, "Hello, World!", 30, 5*time.Second)
+}

2022/Days/day62.md

@@ -56,9 +56,32 @@ Managed Cloud offering
 
 - [Terraform Sentinel](https://www.terraform.io/cloud-docs/sentinel) - embedded policy-as-code framework integrated with the HashiCorp Enterprise products. It enables fine-grained, logic-based policy decisions, and can be extended to use information from external sources.
 
-Automated testing
+### Automated testing
 
 - [Terratest](https://terratest.gruntwork.io/) - Terratest is a Go library that provides patterns and helper functions for testing infrastructure
+- Terratest makes it easier to write automated tests for our infrastructure code. It provides a variety of helper functions and patterns for common infrastructure testing.
+- find code at 2022/Days/IaC/Terratest
+- To Run this application
+  * git clone #repo_url# <br />
+  * cd test  <br />
+  * go mod init "<MODULE_NAME>"  <br />
+  **MODULE_NAME would be github.com/<YOUR_USERNAME>/<YOUR_REPO_NAME>**  <br />
+  * go mod init github.com/<FOLDER-PATH>  <br/>
+  * go run
+
+--------------------------------------------------------------------------------------------------------------------------------------------------------------------
+
+go mod init "<MODULE_NAME>" would create go.mod file into test folder.  <br />
+* The go.mod file is the root of dependency management in GoLang. 
+* All the modules which are needed or to be used in the project are maintained here in go.mod file.
+* It creates entry for all the packages we are going to use/import in our project.
+* It reduces effort for getting each dependencies manually.
+
+On running **go test** for the first time you would get go.sum file created. <br />
+* go.sum file is created when **go test** or **go build** is executed for the first time.
+* It installs all the packages with specific version(latest)
+* we do not need to edit or modify this file.
+
 
 Worth a mention