Fastly BDD Tests

Fastly offers a huge opportunity of customizing user journeys using the VCL conditionals/flows. More details here - https://abiydv.github.io/posts/fastly-bdd/

What is where?

terraform - Terraform configs to create a sample Fastly service
vcl - The VCL snippets
tests - Feature files and tests implementation

Pre-requisites

Sign-up for a limited free Fastly account
Terraform 12 or above

Deploy Fastly service and VCLs

Export FASTLY_API_KEY
```
export FASTLY_API_KEY=aabbccdd_01234
```
Switch to terraform directory, initialize terraform and check plan
```
cd terraform
terraform plan
```

Apply plan to create the Fastly service

terraform apply

$ Apply complete! Resources: 3 added, 0 changed, 0 destroyed.

Run Tests

Switch to tests directory and create a virtual py environment
```
cd tests
python3 -m venv env
```

Activate the py virtual environment and install dependencies

source env/bin/activate
(env) pip3 install -r requirements.txt

Execute behave tests

behave
.
.
1 feature passed, 0 failed, 0 skipped
1 scenario passed, 0 failed, 0 skipped
6 steps passed, 0 failed, 0 skipped, 0 undefined
Took 0m0.051s

Cleanup

Export FASTLY_API_KEY
```
export FASTLY_API_KEY=aabbccdd_01234
```
Switch to terraform directory
```
cd terraform
terraform plan
```

Delete the Fastly service

terraform destroy

$ Apply complete! Resources: 0 added, 0 changed, 3 destroyed.

Note

This is a test/proof-of-concept. There are some configs to make it quick, which should be removed before actual implementation.

verify=False flag in requests.get() call. File steps.py.
This is necessary because the Fastly shared certs will not have the test domain created (fastly-bdd-example.com) as part of this example. Without this flag the call will fail.
Adding the Fastly shared domain fastly-bdd-example.com.global.prod.fastly.net in feature files.