Terratest in GitHub Action fails - github-actions

Question

when running terratest locally with an assertion it works as expected. But when trying to run it via a github action i get the error below (removing the assertion has terratest running as expected):
TestTerraform 2022-07-27T08:34:49Z logger.go:66: ::set-output name=exitcode::0
output.go:19:
Error Trace: output.go:19
terraform_test.go:24
Error: Received unexpected error:
invalid character 'c' looking for beginning of value
Test: TestTerraform
The terratest file looks like:
package test
import (
"github.com/gruntwork-io/terratest/modules/terraform"
"github.com/stretchr/testify/assert"
"testing"
)
func TestTerraform(t *testing.T) {
iam_arn_expected := "arn:aws:iam::xxx:role/terratest_iam"
terraformOptions := terraform.WithDefaultRetryableErrors(t, &terraform.Options{
TerraformDir: "../examples/simple",
Vars: map[string]interface{}{
"iam_name": "terratest_iam",
"region": "eu-west-2",
},
})
defer terraform.Destroy(t, terraformOptions)
terraform.InitAndApply(t, terraformOptions)
iam_arn := terraform.Output(t, terraformOptions, "iam_arn")
assert.Equal(t, iam_arn_expected, iam_arn)
}
the github action looks like:
jobs:
terratest:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout#v3
- uses: actions/setup-go#v3.2.1
- name: Install tfenv
run: |
git clone https://github.com/tfutils/tfenv.git ~/.tfenv
echo "$HOME/.tfenv/bin" >> $GITHUB_PATH
- name: Install Terraform
working-directory: .
run: |
pwd
tfenv install
terraform --version
- name: Download Go Modules
working-directory: test
run: go mod download
- name: Run Terratest
working-directory: test
run: go test -v
env:
AWS_ACCESS_KEY_ID: ${{ secrets.AWS_PLAYGROUND_ID }}
AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_PLAYGROUND_KEY }}

Answer 1

The solution is to use the HashiCorp setup-terraform action with the Terraform wrapper turned off in place of your "Install Terraform" step.
- name: Setup Terraform
uses: hashicorp/setup-terraform#v2
with:
terraform_version: 1.3.6
terraform_wrapper: false