Terraform CDK Samples

// CDKTF TypeScript Setup and Basic Usage
import { Construct } from 'constructs';
import { App, TerraformStack, RemoteBackend, TerraformOutput } from 'cdktf';
import { AwsProvider } from '@cdktf/provider-aws/lib/provider';
import { S3Bucket } from '@cdktf/provider-aws/lib/s3-bucket';
import { Vpc } from '@cdktf/provider-aws/lib/vpc';
import { Subnet } from '@cdktf/provider-aws/lib/subnet';
import { Instance } from '@cdktf/provider-aws/lib/instance';
import { SecurityGroup } from '@cdktf/provider-aws/lib/security-group';

class MyTerraformStack extends TerraformStack {
  constructor(scope: Construct, id: string) {
    super(scope, id);

    // Configure AWS provider
    new AwsProvider(this, 'aws', {
      region: 'us-west-2',
      defaultTags: {
        tags: {
          Environment: 'development',
          Project: 'cdktf-demo',
          ManagedBy: 'cdktf'
        }
      }
    });

    // Create S3 bucket
    const bucket = new S3Bucket(this, 'my-app-bucket', {
      bucket: `my-unique-app-bucket-${Math.floor(Math.random() * 1000000)}`,
      acl: 'private',
      versioning: {
        enabled: true
      },
      tags: {
        Name: 'my-app-bucket',
        Purpose: 'application-storage'
      }
    });

    // Create VPC
    const vpc = new Vpc(this, 'my-vpc', {
      cidrBlock: '10.0.0.0/16',
      enableDnsHostnames: true,
      enableDnsSupport: true,
      tags: {
        Name: 'my-app-vpc'
      }
    });

    // Create public subnets
    const publicSubnet1 = new Subnet(this, 'public-subnet-1', {
      vpcId: vpc.id,
      cidrBlock: '10.0.1.0/24',
      availabilityZone: 'us-west-2a',
      mapPublicIpOnLaunch: true,
      tags: {
        Name: 'public-subnet-1',
        Type: 'public'
      }
    });

    const publicSubnet2 = new Subnet(this, 'public-subnet-2', {
      vpcId: vpc.id,
      cidrBlock: '10.0.2.0/24',
      availabilityZone: 'us-west-2b',
      mapPublicIpOnLaunch: true,
      tags: {
        Name: 'public-subnet-2',
        Type: 'public'
      }
    });

    // Create security group
    const securityGroup = new SecurityGroup(this, 'app-sg', {
      name: 'app-security-group',
      vpcId: vpc.id,
      ingress: [
        {
          description: 'Allow SSH',
          fromPort: 22,
          toPort: 22,
          protocol: 'tcp',
          cidrBlocks: ['0.0.0.0/0']
        },
        {
          description: 'Allow HTTP',
          fromPort: 80,
          toPort: 80,
          protocol: 'tcp',
          cidrBlocks: ['0.0.0.0/0']
        }
      ],
      egress: [
        {
          fromPort: 0,
          toPort: 0,
          protocol: '-1',
          cidrBlocks: ['0.0.0.0/0']
        }
      ],
      tags: {
        Name: 'app-security-group'
      }
    });

    // Create EC2 instance
    const instance = new Instance(this, 'app-instance', {
      ami: 'ami-0c55b159cbfafe1f0', // Amazon Linux 2
      instanceType: 't3.micro',
      subnetId: publicSubnet1.id,
      vpcSecurityGroupIds: [securityGroup.id],
      associatePublicIpAddress: true,
      tags: {
        Name: 'app-instance'
      },
      userData: `#!/bin/bash
yum update -y
yum install -y httpd
systemctl start httpd
systemctl enable httpd
echo "<h1>Hello from CDKTF!</h1>" > /var/www/html/index.html
`
    });

    // Output values
    new TerraformOutput(this, 'bucket_name', {
      value: bucket.id,
      description: 'The name of the S3 bucket'
    });

    new TerraformOutput(this, 'vpc_id', {
      value: vpc.id,
      description: 'The ID of the VPC'
    });

    new TerraformOutput(this, 'instance_public_ip', {
      value: instance.publicIp,
      description: 'The public IP of the EC2 instance'
    });
  }
}

// Initialize the app
const app = new App();

// Create the stack
new MyTerraformStack(app, 'cdktf-demo-stack');

// Configure remote backend (optional)
app.outdir = 'cdktf.out';

// Synthesize Terraform configuration
app.synth();

# CDKTF Python for Azure Resources
from cdktf import App, TerraformStack, TerraformOutput
from cdktf_cdktf_provider_azure import provider as azurerm_provider
from cdktf_cdktf_provider_azure import resource_group, storage_account, virtual_network, subnet, network_interface, linux_virtual_machine

class AzureWebAppStack(TerraformStack):
    def __init__(self, scope, id):
        super().__init__(scope, id)

        # Configure Azure Provider
        azurerm = azurerm_provider.AzurermProvider(self, "azure",
            features={}
        )

        # Resource Group
        resource_group = resource_group.ResourceGroup(self, "app-rg",
            name="cdktf-webapp-rg",
            location="East US",
            tags={
                "Environment": "development",
                "Project": "cdktf-demo"
            }
        )

        # Virtual Network
        virtual_network = virtual_network.VirtualNetwork(self, "app-vnet",
            name="cdktf-vnet",
            address_space=["10.0.0.0/16"],
            location=resource_group.location,
            resource_group_name=resource_group.name,
            tags={
                "Name": "cdktf-vnet"
            }
        )

        # Subnet
        subnet = subnet.Subnet(self, "app-subnet",
            name="cdktf-subnet",
            resource_group_name=resource_group.name,
            virtual_network_name=virtual_network.name,
            address_prefixes=["10.0.1.0/24"],
            depends_on=[virtual_network]
        )

        # Public IP
        from cdktf_cdktf_provider_azure import public_ip
        public_ip = public_ip.PublicIp(self, "app-pip",
            name="cdktf-pip",
            location=resource_group.location,
            resource_group_name=resource_group.name,
            allocation_method="Dynamic",
            tags={
                "Name": "cdktf-pip"
            }
        )

        # Network Security Group
        from cdktf_cdktf_provider_azure import network_security_group
        nsg = network_security_group.NetworkSecurityGroup(self, "app-nsg",
            name="cdktf-nsg",
            location=resource_group.location,
            resource_group_name=resource_group.name,
            security_rule=[
                {
                    "name": "SSH",
                    "priority": 1001,
                    "direction": "Inbound",
                    "access": "Allow",
                    "protocol": "Tcp",
                    "source_port_range": "*",
                    "destination_port_range": "22",
                    "source_address_prefix": "*",
                    "destination_address_prefix": "*"
                },
                {
                    "name": "HTTP",
                    "priority": 1002,
                    "direction": "Inbound",
                    "access": "Allow",
                    "protocol": "Tcp",
                    "source_port_range": "*",
                    "destination_port_range": "80",
                    "source_address_prefix": "*",
                    "destination_address_prefix": "*"
                }
            ],
            tags={
                "Name": "cdktf-nsg"
            }
        )

        # Network Interface
        network_interface = network_interface.NetworkInterface(self, "app-nic",
            name="cdktf-nic",
            location=resource_group.location,
            resource_group_name=resource_group.name,
            ip_configuration=[{
                "name": "internal",
                "subnet_id": subnet.id,
                "private_ip_address_allocation": "Dynamic",
                "public_ip_address_id": public_ip.id
            }],
            depends_on=[subnet, public_ip]
        )

        # Associate NSG with NIC
        from cdktf_cdktf_provider_azure import network_interface_security_group_association
        nsg_assoc = network_interface_security_group_association.NetworkInterfaceSecurityGroupAssociation(
            self, "app-nsg-assoc",
            network_interface_id=network_interface.id,
            network_security_group_id=nsg.id
        )

        # Storage Account
        storage_account = storage_account.StorageAccount(self, "app-storage",
            name=f"cdktfstorage{self.generate_random_string(8)}",
            resource_group_name=resource_group.name,
            location=resource_group.location,
            account_tier="Standard",
            account_replication_type="LRS",
            tags={
                "Name": "cdktf-storage"
            }
        )

        # Linux Virtual Machine
        linux_vm = linux_virtual_machine.LinuxVirtualMachine(self, "app-vm",
            name="cdktf-linux-vm",
            location=resource_group.location,
            resource_group_name=resource_group.name,
            network_interface_ids=[network_interface.id],
            size="Standard_B1s",
            admin_username="adminuser",
            admin_ssh_key={
                "username": "adminuser",
                "public_key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC..."  # Replace with your public key
            },
            os_disk={
                "caching": "ReadWrite",
                "storage_account_type": "Standard_LRS"
            },
            source_image_reference={
                "publisher": "Canonical",
                "offer": "UbuntuServer",
                "sku": "18.04-LTS",
                "version": "latest"
            },
            custom_data=self.get_user_data(),
            tags={
                "Name": "cdktf-linux-vm"
            },
            depends_on=[network_interface]
        )

        # Outputs
        TerraformOutput(self, "resource_group_name",
            value=resource_group.name
        )

        TerraformOutput(self, "vm_public_ip",
            value=public_ip.ip_address
        )

        TerraformOutput(self, "storage_account_name",
            value=storage_account.name
        )

    def generate_random_string(self, length):
        import random
        import string
        return ''.join(random.choices(string.ascii_lowercase + string.digits, k=length))

    def get_user_data(self):
        return '''#!/bin/bash
apt-get update
apt-get install -y apache2
systemctl start apache2
systemctl enable apache2
echo "<h1>Hello from CDKTF on Azure!</h1>" > /var/www/html/index.html
'''

# Initialize the app
app = App(outdir="cdktf.out")

# Create the stack
AzureWebAppStack(app, "azure-webapp-stack")

# Synthesize Terraform configuration
app.synth()

// CDKTF Component Pattern - Reusable Infrastructure Components
import { Construct } from 'constructs';
import { TerraformStack, TerraformOutput } from 'cdktf';
import { AwsProvider } from '@cdktf/provider-aws/lib/provider';
import { S3Bucket } from '@cdktf/provider-aws/lib/s3-bucket';
import { IamRole, IamRolePolicyAttachment } from '@cdktf/provider-aws/lib/iam';
import { DataAwsIamPolicyDocument } from '@cdktf/provider-aws/lib/data-aws-iam-policy-document';
import { LambdaFunction } from '@cdktf/provider-aws/lib/lambda';
import { ApiGatewayRestApi, ApiGatewayResource, ApiGatewayMethod, ApiGatewayIntegration } from '@cdktf/provider-aws/lib/api-gateway';
import { RdsInstance } from '@cdktf/provider-aws/lib/rds-instance';
import { RdsSubnetGroup } from '@cdktf/provider-aws/lib/rds-subnet-group';
import { SecurityGroup } from '@cdktf/provider-aws/lib/security-group';

// Reusable Web Application Component
class WebAppComponent extends Construct {
  public readonly bucket: S3Bucket;
  public readonly apiEndpoint: string;

  constructor(scope: Construct, id: string, props: {
    appName: string;
    environment: string;
    runtime?: string;
    handler?: string;
  }) {
    super(scope, id);

    // Create S3 bucket for static assets
    this.bucket = new S3Bucket(this, `${id}-bucket`, {
      bucket: `${props.appName}-${props.environment}-assets-${Math.floor(Math.random() * 1000000)}`,
      acl: 'private',
      versioning: {
        enabled: true
      },
      website: {
        indexDocument: 'index.html',
        errorDocument: 'error.html'
      },
      tags: {
        Name: `${props.appName}-${props.environment}-assets`,
        Environment: props.environment
      }
    });

    // Create IAM role for Lambda
    const assumeRolePolicy = new DataAwsIamPolicyDocument(this, 'lambda-assume-role', {
      statement: [{
        effect: 'Allow',
        principals: [{
          type: 'Service',
          identifiers: ['lambda.amazonaws.com']
        }],
        actions: ['sts:AssumeRole']
      }]
    });

    const lambdaRole = new IamRole(this, 'lambda-role', {
      name: `${props.appName}-${props.environment}-lambda-role`,
      assumeRolePolicy: assumeRolePolicy.json,
      tags: {
        Name: `${props.appName}-${props.environment}-lambda-role`,
        Environment: props.environment
      }
    });

    // Attach basic Lambda execution policy
    new IamRolePolicyAttachment(this, 'lambda-basic-execution', {
      policyArn: 'arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole',
      role: lambdaRole.name
    });

    // Create Lambda function
    const lambdaFunction = new LambdaFunction(this, 'api-function', {
      functionName: `${props.appName}-${props.environment}-api`,
      runtime: props.runtime || 'nodejs18.x',
      handler: props.handler || 'index.handler',
      role: lambdaRole.arn,
      s3Bucket: this.bucket.id,
      s3Key: 'api/lambda.zip',
      tags: {
        Name: `${props.appName}-${props.environment}-api`,
        Environment: props.environment
      }
    });

    // Create API Gateway
    const api = new ApiGatewayRestApi(this, 'api-gateway', {
      name: `${props.appName}-${props.environment}-api`,
      description: `API Gateway for ${props.appName} in ${props.environment}`
    });

    // Create API resource
    const apiResource = new ApiGatewayResource(this, 'api-resource', {
      restApiId: api.id,
      parentId: api.rootResourceId,
      pathPart: '{proxy+}'
    });

    // Create API method
    const apiMethod = new ApiGatewayMethod(this, 'api-method', {
      restApiId: api.id,
      resourceId: apiResource.id,
      httpMethod: 'ANY',
      authorization: 'NONE'
    });

    // Create API integration
    new ApiGatewayIntegration(this, 'api-integration', {
      restApiId: api.id,
      resourceId: apiResource.id,
      httpMethod: apiMethod.httpMethod,
      integrationHttpMethod: 'POST',
      type: 'AWS_PROXY',
      uri: lambdaFunction.invokeArn
    });

    // Grant API Gateway permission to invoke Lambda
    new IamRolePolicyAttachment(this, 'lambda-api-gateway-permission', {
      policyArn: 'arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole',
      role: lambdaRole.name
    });

    this.apiEndpoint = api.deploymentStageInvokeUrl;

    // Output
    new TerraformOutput(this, 'bucket_name', {
      value: this.bucket.id,
      description: 'S3 bucket name for static assets'
    });

    new TerraformOutput(this, 'api_endpoint', {
      value: this.apiEndpoint,
      description: 'API Gateway endpoint URL'
    });
  }
}

// Database Component
class DatabaseComponent extends Construct {
  public readonly endpoint: string;

  constructor(scope: Construct, id: string, props: {
    appName: string;
    environment: string;
    instanceClass?: string;
    allocatedStorage?: number;
  }) {
    super(scope, id);

    // Create subnet group for RDS
    const subnetGroup = new RdsSubnetGroup(this, 'db-subnet-group', {
      name: `${props.appName}-${props.environment}-db-subnet-group`,
      subnetIds: [], // Pass subnet IDs as parameters
      tags: {
        Name: `${props.appName}-${props.environment}-db-subnet-group`,
        Environment: props.environment
      }
    });

    // Create security group for RDS
    const dbSecurityGroup = new SecurityGroup(this, 'db-security-group', {
      name: `${props.appName}-${props.environment}-db-sg`,
      vpcId: '', // Pass VPC ID as parameter
      ingress: [{
        description: 'Allow MySQL traffic',
        fromPort: 3306,
        toPort: 3306,
        protocol: 'tcp',
        securityGroups: [] // Pass app security group IDs
      }],
      tags: {
        Name: `${props.appName}-${props.environment}-db-sg`,
        Environment: props.environment
      }
    });

    // Create RDS instance
    const dbInstance = new RdsInstance(this, 'db-instance', {
      identifier: `${props.appName}-${props.environment}-db`,
      engine: 'mysql',
      instanceClass: props.instanceClass || 'db.t3.micro',
      allocatedStorage: props.allocatedStorage || 20,
      storageType: 'gp2',
      engineVersion: '8.0',
      username: 'admin',
      password: 'changeme123!', // Use secret management in production
      dbSubnetGroupName: subnetGroup.name,
      vpcSecurityGroupIds: [dbSecurityGroup.id],
      skipFinalSnapshot: true,
      storageEncrypted: true,
      tags: {
        Name: `${props.appName}-${props.environment}-db`,
        Environment: props.environment
      }
    });

    this.endpoint = dbInstance.endpoint;

    new TerraformOutput(this, 'db_endpoint', {
      value: this.endpoint,
      description: 'Database endpoint'
    });
  }
}

// Main stack using components
class MyWebAppStack extends TerraformStack {
  constructor(scope: Construct, id: string) {
    super(scope, id);

    // Configure AWS provider
    new AwsProvider(this, 'aws', {
      region: 'us-west-2',
      defaultTags: {
        tags: {
          Project: 'cdktf-component-demo',
          ManagedBy: 'cdktf'
        }
      }
    });

    // Create web application component
    const webApp = new WebAppComponent(this, 'webapp', {
      appName: 'my-app',
      environment: 'production',
      runtime: 'nodejs18.x',
      handler: 'api.handler'
    });

    // Create database component
    const database = new DatabaseComponent(this, 'database', {
      appName: 'my-app',
      environment: 'production',
      instanceClass: 'db.t3.small',
      allocatedStorage: 50
    });

    // Additional outputs
    new TerraformOutput(this, 'app_info', {
      value: {
        staticAssetsBucket: webApp.bucket.id,
        apiEndpoint: webApp.apiEndpoint,
        databaseEndpoint: database.endpoint
      }
    });
  }
}

// Usage
import { App } from 'cdktf';

const app = new App();
new MyWebAppStack(app, 'component-demo-stack');
app.synth();

// CDKTF Testing Strategy
import { Testing } from 'cdktf';
import { SynthesizedStack, TerraformStack } from 'cdktf';
import { App } from 'cdktf';
import { AwsProvider } from '@cdktf/provider-aws/lib/provider';
import { S3Bucket } from '@cdktf/provider-aws/lib/s3-bucket';
import { expect, haveResource } from '@cdktf/assert';

// Example stack to test
class ExampleStack extends TerraformStack {
  public readonly bucket: S3Bucket;

  constructor(scope: Construct, id: string) {
    super(scope, id);

    new AwsProvider(this, 'aws', {
      region: 'us-east-1'
    });

    this.bucket = new S3Bucket(this, 'test-bucket', {
      bucket: 'my-test-bucket',
      versioning: {
        enabled: true
      }
    });
  }
}

// Basic synthesis test
describe('ExampleStack Synthesis', () => {
  let app: App;
  let stack: ExampleStack;
  let synthesized: SynthesizedStack;

  beforeEach(() => {
    app = new App();
    stack = new ExampleStack(app, 'test-stack');
    synthesized = Testing.synth(stack);
  });

  test('should have correct AWS provider configuration', () => {
    const provider = synthesized.getResource('aws_provider.aws');
    expect(provider).toBeDefined();
    expect(provider.config.region).toBe('us-east-1');
  });

  test('should create S3 bucket with correct properties', () => {
    const bucket = synthesized.getResource('aws_s3_bucket.test-bucket');
    expect(bucket).toBeDefined();
    expect(bucket.config.bucket).toBe('my-test-bucket');
    expect(bucket.config.versioning).toEqual({
      enabled: true
    });
  });

  test('should generate valid Terraform JSON', () => {
    const terraformJson = synthesized.toHcl();
    expect(terraformJson).toContain('resource "aws_s3_bucket" "test-bucket"');
    expect(terraformJson).toContain('versioning');
    expect(terraformJson).toContain('enabled = true');
  });
});

// Snapshot testing
describe('ExampleStack Snapshots', () => {
  test('should match snapshot', () => {
    const app = new App();
    const stack = new ExampleStack(app, 'test-stack');
    const synthesized = Testing.synth(stack);

    // Compare with snapshot
    expect(synthesized).toMatchSnapshot();
  });
});

// Component testing with fixtures
import { Template } from 'cdktf';

describe('Infrastructure Template Testing', () => {
  test('should create infrastructure with expected resources', () => {
    const app = new App();
    const stack = new ExampleStack(app, 'test-stack');

    // Get the template
    const template = Template.fromStack(stack);

    // Test that specific resources exist
    template.hasResourceProperties('aws_s3_bucket', {
      bucket: 'my-test-bucket',
      versioning: {
        enabled: true
      }
    });

    // Test resource count
    template.resourceCountIs('aws_s3_bucket', 1);
    template.resourceCountIs('aws_provider', 1);
  });

  test('should have correct resource dependencies', () => {
    const app = new App();
    const stack = new ExampleStack(app, 'test-stack');

    const template = Template.fromStack(stack);

    // Test that S3 bucket depends on AWS provider
    const dependencies = template.getDependencies('aws_s3_bucket.test-bucket');
    expect(dependencies).toContain('aws_provider.aws');
  });
});

// Validation tests
describe('Infrastructure Validation', () => {
  test('should validate naming conventions', () => {
    const app = new App();
    const stack = new ExampleStack(app, 'test-stack');
    const synthesized = Testing.synth(stack);

    // Get all resource names and validate patterns
    const resources = synthesized.resources;
    const bucketResource = resources.find(r => r.type === 'aws_s3_bucket');

    expect(bucketResource).toBeDefined();
    expect(bucketResource!.config.bucket).toMatch(/^[a-z0-9][a-z0-9-]*[a-z0-9]$/);
  });

  test('should validate required properties', () => {
    const app = new App();
    const stack = new ExampleStack(app, 'test-stack');

    // Test that required properties are set
    expect(() => {
      const bucket = stack.bucket;
      expect(bucket.id).toBeDefined();
      expect(bucket.bucket).toBeDefined();
    }).not.toThrow();
  });
});

// Integration tests with real Terraform
import { execSync } from 'child_process';
import * as path from 'path';
import * as fs from 'fs';

describe('Integration Tests', () => {
  const workingDir = path.join(__dirname, 'terraform-working-dir');

  beforeEach(() => {
    // Clean up working directory
    if (fs.existsSync(workingDir)) {
      fs.rmSync(workingDir, { recursive: true, force: true });
    }
    fs.mkdirSync(workingDir, { recursive: true });
  });

  afterEach(() => {
    // Clean up after tests
    if (fs.existsSync(workingDir)) {
      try {
        execSync('terraform destroy -auto-approve', {
          cwd: workingDir,
          stdio: 'pipe'
        });
      } catch (error) {
        // Ignore destroy errors
      }
      fs.rmSync(workingDir, { recursive: true, force: true });
    }
  });

  test('should successfully plan and apply with real Terraform', () => {
    const app = new App();
    const stack = new ExampleStack(app, 'integration-test-stack');

    // Synthesize to working directory
    Testing.synthToDirectory(stack, workingDir);

    // Initialize Terraform
    execSync('terraform init', {
      cwd: workingDir,
      stdio: 'pipe'
    });

    // Run Terraform plan
    const planOutput = execSync('terraform plan -json', {
      cwd: workingDir,
      encoding: 'utf-8'
    });

    const plan = JSON.parse(planOutput);
    expect(plan.planned_values).toBeDefined();

    // Run Terraform apply (only in test environment with proper cleanup)
    if (process.env.RUN_INTEGRATION_TESTS === 'true') {
      const applyOutput = execSync('terraform apply -auto-approve', {
        cwd: workingDir,
        encoding: 'utf-8'
      });

      expect(applyOutput).toContain('Apply complete');

      // Verify resources were created
      const output = execSync('terraform output -json', {
        cwd: workingDir,
        encoding: 'utf-8'
      });

      const outputs = JSON.parse(output);
      expect(outputs).toBeDefined();
    }
  });
});

// Performance tests
describe('Performance Tests', () => {
  test('should synthesize within reasonable time', () => {
    const startTime = Date.now();

    const app = new App();
    const stack = new ExampleStack(app, 'performance-test-stack');
    Testing.synth(stack);

    const endTime = Date.now();
    const synthesisTime = endTime - startTime;

    // Should complete synthesis in under 5 seconds for this simple stack
    expect(synthesisTime).toBeLessThan(5000);
  });

  test('should handle large stacks efficiently', () => {
    const startTime = Date.now();

    const app = new App();
    const stack = new TerraformStack(app, 'large-test-stack');

    new AwsProvider(stack, 'aws', { region: 'us-east-1' });

    // Create many resources
    for (let i = 0; i < 100; i++) {
      new S3Bucket(stack, `bucket-${i}`, {
        bucket: `large-test-bucket-${i}`,
        versioning: { enabled: true }
      });
    }

    const synthesized = Testing.synth(stack);
    const endTime = Date.now();

    const synthesisTime = endTime - startTime;

    // Should handle 100 resources in reasonable time
    expect(synthesisTime).toBeLessThan(30000);
    expect(synthesized.resources.length).toBeGreaterThanOrEqual(100);
  });
});