Fix quoting for list variables in tf_vars

[sklarsa]

Running the latest tftest version (1.5.4)

My module has a list variable...
variables.py

variable role_policies {
  type    = list
  default = []
}

And when I run the following code in my test...
test_module.py

new_role = tf_plan(role_policies=["ecs_task_execution"])

I get the following output...

E       tftest.TerraformTestError: Error running command plan: 1
E       Error: Invalid character
E
E         on <value for var.role_policies> line 1:
E         (source code not available)
E
E       Single quotes are not valid. Use double quotes (") to enclose strings.
E
E
E       Error: Invalid expression
E
E         on <value for var.role_policies> line 1:
E         (source code not available)
E
E       Expected the start of an expression, but found an invalid expression token.

This seems similar to #20

[ludoo]

Steven, thanks for reporting this, I'll get on it ASAP.

[ludoo]

Hah, I read that too quickly (dinner was calling), and did not spot the fact you're passing a Python list to tf_plan, not a Terraform list, which is a Python string. Try this

new_role = tf_plan(role_policies='["ecs_task_execution"]')

And let me know if it works, as we're using tons of list variables in our tests and I've never had issues with them.

[sklarsa]

Yep that works.. thanks!