[info] + ExecutorSpec
[info]   + Create the default unyielding executor and check that:
[info]     + When converted to an EC, it reports Throwables to stdout
[info]     + Create an executor that cannot have tasks submitted to and check that:
[info]       + It throws an exception upon submission
[info]       + When converted to an ExecutionContext, it throws an exception
[info]       + When created from an EC, throw when fed an effect
[info]     + Create a yielding executor and check that:
[info]       + Runnables can be submitted 
[info]       + When converted to an ExecutionContext, it accepts Runnables
[info]       + When created from an EC, must not throw when fed an effect 
[info]     + Create an unyielding executor and check that:
[info]       + Runnables can be submitted
[info]       + When converted to an ExecutionContext, it accepts Runnables

[info] + ExecutorSpec
[info]   + Create the default unyielding executor and check that:
[info]     + When converted to an EC, it reports Throwables to stdout
[info]   + Create an executor that cannot have tasks submitted to and check that:
[info]     + It throws an exception upon submission
[info]     + When converted to an ExecutionContext, it throws an exception
[info]     + When created from an EC, throw when fed an effect
[info]   + Create a yielding executor and check that:
[info]     + Runnables can be submitted 
[info]     + When converted to an ExecutionContext, it accepts Runnables
[info]     + When created from an EC, must not throw when fed an effect 
[info]   + Create an unyielding executor and check that:
[info]     + Runnables can be submitted
[info]     + When converted to an ExecutionContext, it accepts Runnables