avm-tf-testing

name	avm-tf-testing
description	Use for AVM Terraform validation, provider-mocked unit tests, real-Azure integration tests, E2E example tests, PowerShell hooks, OIDC, policy checks, and Avm.Authoring CI behavior.

AVM Terraform Testing

Use PowerShell 7.4 or later with the Avm.Authoring module. The old repository launcher, Make targets, Porch flags, and container workflow are retired.

Install-PSResource -Name Avm.Authoring -Repository PSGallery -TrustRepository
Import-Module Avm.Authoring
avm version

Test surfaces

Surface	Command	Purpose
Terraform validation	avm test	Run Terraform initialization when needed and validate the module.
Unit tests	avm test unit	Run tests/unit/*.tftest.hcl with mocked providers.
Integration tests	avm test integration	Run tests/integration/*.tftest.hcl against real Azure.
E2E examples	avm test e2e	Apply, idempotency-check, and destroy runnable examples/*.
Policy	avm check policy	Build example plan JSON and evaluate APRL and AVMSEC through Conftest.
Full PR gate	avm pr-check	Run the clean-worktree PR gauntlet; it does not replace standalone test tiers.

Always name the tier when tests are expected. Bare avm test validates Terraform; it does not run unit, integration, and E2E suites.

Unit tests

Place tests in tests/unit. Mock every provider declared by the module:

mock_provider "azapi" {}
mock_provider "modtm" {}
mock_provider "random" {}

run "creates_the_resource" {
  command = apply

  variables {
    name      = "example"
    parent_id = "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/example"
  }

  assert {
    condition     = output.resource_id != null
    error_message = "The module should return the primary resource ID."
  }
}

Use mocked apply so computed values and resource creation paths can be asserted without Azure. Add focused tests for:

• defaults and optional features;
• validation failures with expect_failures;
• conditional resources;
• outputs;
• parent-to-submodule propagation; and
• resource_types, retry, timeouts, and ignore_body_changes wiring.

For detailed .tftest.hcl syntax, mocking, assertions, and troubleshooting patterns, see the Terraform test reference.

Integration tests

Place real-Azure Terraform tests in tests/integration. Do not mock providers. Keep each run focused, use unique names, and verify behaviors that cannot be proven from a mocked plan.

Authenticate without committed secrets. Local runs can use an authenticated Azure CLI session or supported ARM_* environment variables. CI uses OIDC with least-privilege identities and protected environments.

E2E examples

Each direct child of examples/ is a standalone Terraform root. Discover and target examples with:

avm test e2e --list
avm test e2e --example default

Without --example, runnable examples execute sequentially. A .e2eignore marker excludes an example from discovery. E2E performs:

1. Terraform initialization;
2. deployment;
3. a no-change idempotency plan;
4. cleanup; and
5. bounded retries for recognized capacity failures.

An idempotency diff is a failure and is never hidden by a retry.

For exceptional manual workflows such as distributing examples across subscriptions or retaining deployments for inspection, see the manual example-testing reference.

PowerShell hooks

Supported hooks run in isolated pwsh processes:

• tests/unit/setup.ps1;
• tests/integration/setup.ps1;
• examples/<name>/pre.ps1;
• examples/<name>/post.ps1; and
• examples/<name>/tflint-pre.ps1.

Shell equivalents such as setup.sh, pre.sh, post.sh, or tflint-pre.sh are rejected as configuration errors. Port all hooks to PowerShell.

Use hooks only for required environment preparation or cleanup. Keep Terraform assertions in Terraform tests.

Authoring gates

Before committing:

avm pre-commit

For Terraform this applies sync, fixable convention rules, transforms, formatting, and docs. It is not a substitute for unit or real-Azure tests.

After reviewing and committing all changes:

avm pr-check

The worktree must be clean. PR check runs sync, format, transform, lint, policy, convention, validation, and docs. Unit tests are deliberately a separate reusable-workflow job rather than repeated inside PR check.

CI expectations

• Use the governance-managed reusable Terraform workflow.
• Use OIDC and a user-assigned identity or equivalent secretless federation.
• Keep test environments least privilege and isolate subscriptions where practical.
• Treat skipped as different from pass. If the change requires a test tier, an undiscovered or skipped tier is not evidence.
• Preserve logs for failed Terraform run blocks, plans, policy findings, and cleanup failures.

Debugging

Run the smallest command that reproduces the issue:

avm test unit
avm test integration
avm test e2e --example default
avm lint
avm check policy

Use -Path <module-directory> when testing a module outside the current directory and -Ecosystem terraform when context detection is ambiguous. Use --passthru for structured results in automation. Command failures throw; do not rely on $LASTEXITCODE or parse friendly console output.

When direct Terraform debugging is necessary, keep its flags consistent with the authoring engine and return to the avm command for final validation.