pytest-terra-fixt 0.5.0

Terraform and Terragrunt fixtures for pytest

pytest-terra-fixt

With the use of this plugin, users can run Terragrunt and Terraform commands within Pytest fixtures. Under the hood, the fixtures within this plugin use the awesome tftest Python package.

Fixtures

terra:

• Scope: Function
• Input: (passed within `pytest.mark.parametrize("terra", [{}]))
  • command: Terraform or Terragrunt command to run (e.g. init, plan, apply)
  • binary: Path to binary (must end with terraform or `terragrunt)
  • tfdir: Absolute or relative path to basedir
  • basedir: Base directory for tfdir (defaults to cwd)
  • env: Environment variables to pass to the command
  • skip_teardown: Skips running fixture's teardown logic
  • use_cache: If True, gets command output from terra_cache fixture
  • extra_args: Dictionary of extra arguments to pass to the command
• Setup: Updates cache with selected kwargs provided
• Yield: If use_cache is True, yields output for the input command from the terra_cache fixture. If use_cache is False, yields output from the execution of the command
• Teardown: Runs terraform destroy -auto-approve on the input tfdir directory

terra_factory:

• Scope: Session
• Input: (passed within `pytest.mark.parametrize("terra", [{}]))
  • command: Terraform or Terragrunt command to run (e.g. init, plan, apply)
  • binary: Path to binary (must end with terraform or `terragrunt)
  • tfdir: Absolute or relative path to basedir
  • basedir: Base directory for tfdir (defaults to cwd)
  • env: Environment variables to pass to the command
  • skip_teardown: Skips running fixture's teardown logic
  • use_cache: If True, gets command output from terra_cache fixture
  • extra_args: Dictionary of extra arguments to pass to the command
• Setup: Updates cache with selected kwargs provided
• Yield: If use_cache is True, yields output for the input command from the terra_cache fixture. If use_cache is False, yields output from the execution of the command
• Teardown: Runs terraform destroy -auto-approve on every factory instance's input tfdir directory

terra_cache:

• Scope: Session
• Setup: Runs terraform init on the specified directory
• Yield: Factory fixture that returns a tftest.TerraformTest object that can run subsequent Terraform commands with
• Teardown: Runs terraform destroy -auto-approve on the specified directory

CLI Arguments

--skip-teardown: Skips running terraform destroy -auto-approve on teardown and preserves the Terraform backend tfstate for future testing. This flag is useful for checking out the Terraform resources within the cloud provider console or for running experimental tests without having to wait for the resources to spin up after every Pytest invocation.

NOTE: To continually preserve the Terraform tfstate, the --skip-teardown flag needs to be always present, or else the `terra` or `terra_factory` fixtures' teardown may destroy the Terraform resources and remove the tfstate file.

Examples

terra

import pytest

@pytest.mark.parametrize("terra", [
   {
      "binary": "terraform",
      "command": "apply",
      "tfdir": "bar",
      "env": {
         "TF_LOG": "DEBUG"
      },
      "skip_teardown": False,
      "use_cache": False,
      "extra_args": {"state_out": "/foo"},
   }
], indirect=['terra'])
def test_terra_param(terra):
   assert terra == "zoo"

terra_factory

def test_terra_param(terra):
   plan = terra_factory(binary="terraform", command="plan", tfdir="bar", skip_teardown=True)
   assert plan["doo"] == "zoo"

Installation

Install via Pip:

pip install pytest-terra-fixt