How to pass tfvar file in test harness without putting terraform module in app/modules

Hi Support,

Following does not work:

terraspace@4141debbc4e0:~/example$ cat test/spec/main_spec.rb
describe "main" do
  before(:all) do
    mod_path = File.expand_path("../..", __dir__) # the source of the module to test is 2 levels up
    # Build terraspace project to use as a test harness
    # Will be located at: /tmp/terraspace/test-harnesses/example-harness
    terraspace.build_test_harness(
      name: "example-harness",
      modules: {example: mod_path},
      # See: https://terraspace.cloud/docs/testing/test-harness/
      # config: "spec/fixtures/config",
      tfvars: {example: "spec/fixtures/tfvars/test.tfvars"},
    )
    terraspace.up("example")
  end
  after(:all) do
    terraspace.down("example")
  end

  it "successful deploy" do
    # Replace with your own test
    expect(true).to be true
    # Example
    # pp terraspace.outputs
    # output_value = terraspace.output("example", "name")
    # expect(output_value).to include("some-value")
  end
end
terraspace@4141debbc4e0:~/example$ ls
main.tf  outputs.tf  test  variables.tf
####

And it throws error 

terraspace@4141debbc4e0:~/example$ terraspace test
=> cd test && bundle exec rspec

main
Building test harness at: /tmp/terraspace/test-harnesses/example-harness
  successful deploy (FAILED - 1)
=> TS_ENV=test terraspace down example -y
ERROR: Unable to find example. Searched paths:

    app/stacks/example, app/modules/example, vendor/stacks/example, vendor/modules/example

To see available stacks, try running:

    terraspace list


Failures:

  1) main successful deploy
     Failure/Error:
       terraspace.build_test_harness(
         name: "example-harness",
         modules: {example: mod_path},
         # See: https://terraspace.cloud/docs/testing/test-harness/
         # config: "spec/fixtures/config",
         tfvars: {example: "spec/fixtures/tfvars/test.tfvars"},
       )

     NoMethodError:
       undefined method `[]' for nil:NilClass

             md[1]
               ^^^
     # /home/terraspace/.ruby/gems/rspec-terraspace-0.3.1/lib/rspec/terraspace/project.rb:137:in `detected_type'
     # /home/terraspace/.ruby/gems/rspec-terraspace-0.3.1/lib/rspec/terraspace/project.rb:118:in `block in build_tfvars'
     # /home/terraspace/.ruby/gems/rspec-terraspace-0.3.1/lib/rspec/terraspace/project.rb:117:in `each'
     # /home/terraspace/.ruby/gems/rspec-terraspace-0.3.1/lib/rspec/terraspace/project.rb:117:in `build_tfvars'
     # /home/terraspace/.ruby/gems/rspec-terraspace-0.3.1/lib/rspec/terraspace/project.rb:26:in `create'
     # /home/terraspace/.ruby/gems/rspec-terraspace-0.3.1/lib/rspec/terraspace/ts.rb:13:in `build_test_harness'
     # ./spec/main_spec.rb:6:in `block (2 levels) in <top (required)>'

Finished in 1.62 seconds (files took 0.29204 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/main_spec.rb:19 # main successful deploy

terraspace@4141debbc4e0:~/example$

Following works

terraspace@4141debbc4e0:~/example$ cat test/spec/main_spec.rb
describe "main" do
  before(:all) do
    mod_path = File.expand_path("../..", __dir__) # the source of the module to test is 2 levels up
    # Build terraspace project to use as a test harness
    # Will be located at: /tmp/terraspace/test-harnesses/example-harness
    terraspace.build_test_harness(
      name: "example-harness",
      modules: {example: mod_path},
      # See: https://terraspace.cloud/docs/testing/test-harness/
      # config: "spec/fixtures/config",
      # tfvars: {example: "spec/fixtures/tfvars/test.tfvars"},
    )
    terraspace.up("example")
  end
  after(:all) do
    terraspace.down("example")
  end

  it "successful deploy" do
    # Replace with your own test
    expect(true).to be true
    # Example
    # pp terraspace.outputs
    # output_value = terraspace.output("example", "name")
    # expect(output_value).to include("some-value")
  end
end
terraspace@4141debbc4e0:~/example$ ls
main.tf  outputs.tf  test  variables.tf
terraspace@4141debbc4e0:~/example$

So the question is if we really test purely terraform code only without make app/module structure