test: add provider test suites

Add comprehensive and networking test configurations for
validating the CloudStack Terraform Provider.

Author: kristofer-atlas

tests/README.md

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+# CloudStack Terraform Provider Test Suites
+
+This directory contains test configurations for validating the CloudStack Terraform Provider.
+
+## Test Suites
+
+### comprehensive/
+Full provider feature test covering VMs, networks, volumes, firewall rules, load balancers, and more.
+
+### networking/
+Focused test for networking configuration with egress rules.
+
+## Prerequisites
+
+1. CloudStack API credentials:
+   ```bash
+   export CLOUDSTACK_API_URL="your-api-url"
+   export CLOUDSTACK_API_KEY="your-api-key"
+   export CLOUDSTACK_SECRET_KEY="your-secret-key"
+   ```
+
+2. Terraform 1.0+
+
+3. Built provider (for local testing):
+   ```bash
+   make install
+   ```
+
+## Running Tests
+
+```bash
+cd tests/comprehensive  # or tests/networking
+terraform init
+terraform plan
+terraform apply
+```
+
+## Cleanup
+
+```bash
+terraform destroy
+```

tests/comprehensive/README.md

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+# Comprehensive Provider Test Suite
+
+Tests the CloudStack Terraform Provider capabilities and identifies limitations.
+
+## Test Coverage
+
+1. SSH Keypair
+2. VPC and Networking
+3. Isolated Network with Source NAT
+4. IP Address allocation
+5. Security Groups and Firewall rules
+6. Network ACL
+7. VM Deployment (2 VMs with cloud-init, SSH keys, affinity groups, tags)
+8. Affinity Groups
+9. Volumes
+10. Volume Attachments
+11. Port Forwarding
+12. Load Balancer
+13. Static NAT
+14. Secondary IP
+
+## Usage
+
+```bash
+terraform init
+terraform plan
+terraform apply
+terraform destroy
+```
+
+## Configuration
+
+Copy terraform.tfvars.example to terraform.tfvars and configure:
+
+- api_url - CloudStack API endpoint
+- api_key - API key
+- secret_key - API secret
+- zone - Zone name
+- network_offering - Network offering name
+- service_offering - VM service offering
+- template - Template name
+
+## Known Limitations
+
+Some resources have stub implementations or missing update functions. See provider documentation for details.