v1.12.2/internal/command/testdata/test/mocking/tests/module_mocked.tftest.hcl

override_module {
  target = module.child[1]
  outputs = {
    primary = [
      {
        id = "bbbb"
      }
    ]
    secondary = [
      {
        id = "cccc"
      }
    ]
  }
}

variables {
  instances = 3
  child_instances = 1
}

run "test" {

  assert {
    condition = module.child[0].primary[0].id != "bbbb"
    error_message = "wrongly applied mocks"
  }

  assert {
    condition = module.child[1].primary[0].id == "bbbb"
    error_message = "did not apply mocks"
  }

  assert {
    condition = module.child[1].secondary[0].id == "cccc"
    error_message = "did not apply mocks"
  }

  assert {
    condition = module.child[2].secondary[0].id != "cccc"
    error_message = "wrongly applied mocks"
  }

}