The Tester submodule

You automagically get a submodule of the Examples module. It contains functions used to run tests.

When you use a variant in your Examples module, like this:

defmodule Examples.SchemaName.Insert do
  use TransformerTestSupport.Variants.EctoClassic.Insert
  ...
end

You can think of yourself as also defining a submodule that looks like this:

defmodule Examples.SchemaName.Insert do
  use TransformerTestSupport.Variants.EctoClassic.Insert
  ...
  defmodule Tester do 
    def test_data()...
    def example(name)...
    def params(example_name)...      
    def check_workflow(example_name, trace_opts \\ [])...
    ...
  end
end

All of the above functions are common to every variant. The most important is check_workflow. It runs a series of creation and checking steps and reports the results via ExUnit. The tracing options are explained [[[where]]].

Workflow functions

Diagnostic functions

test_data() returns how the results of create_test_data are stored. There's a lot of repetition in it for convenience, so it's unlikely to be interesting to you.

example(name) returns the portion of the test data that is specific to one example. It's also fairly complicated: