Functions
None	test_a_species_can_be_added_at_runtime ()
None	test_a_species_file_can_be_layered_on_top (Path tmp_path)
None	test_a_backend_that_is_not_coolprop_can_join_a_chain ()
None	test_measured_data_wins_where_it_has_coverage ()
None	test_measured_data_refuses_outside_its_grid_rather_than_extrapolating ()
None	test_measured_data_rejects_unregistered_properties ()
None	test_a_new_property_can_be_registered ()
None	test_shipped_species_are_declared_as_data_not_code ()
list[str]	tomllib_keys (Path path)

Variables
	_value = value

Detailed Description

The extension points, exercised from outside the package.

"Nothing hardcoded" is a claim that decays silently. Adding a special case is
always the cheap move in the moment, and nothing fails when the seam quietly
stops working -- the code still runs, it just can no longer be extended without
editing it. These tests are what makes that failure loud.

Each one adds something *from the outside*, the way a project using this library
would, and asserts it took effect without touching the package:

* a species that is not in ``species.toml``
* a whole species file layered on top of the shipped one
* a backend that is not CoolProp at all
* measured data placed in front of an equation of state
* a property this package never heard of

If any of these needs a change inside ``feedtwin/props`` to pass, the seam it
covers is gone.

Function Documentation

◆ test_a_backend_that_is_not_coolprop_can_join_a_chain()

None test_props_modularity.test_a_backend_that_is_not_coolprop_can_join_a_chain ( )

The seam is the protocol, not the library behind it.

A deliberately absurd backend -- constant density, nothing else -- proves
the chain talks to the protocol and never to CoolProp specifically. This is
what a REFPROP or Modelica media backend would slot into.

Definition at line 81 of file test_props_modularity.py.

◆ test_a_new_property_can_be_registered()

None test_props_modularity.test_a_new_property_can_be_registered ( )

Quantities this package never shipped can still flow through it.

Definition at line 171 of file test_props_modularity.py.

◆ test_a_species_can_be_added_at_runtime()

None test_props_modularity.test_a_species_can_be_added_at_runtime ( )

Argon is not in species.toml. It works anyway, with no code change.

Definition at line 46 of file test_props_modularity.py.

◆ test_a_species_file_can_be_layered_on_top()

None test_props_modularity.test_a_species_file_can_be_layered_on_top ( Path tmp_path )

A project can ship its own fluid table; later definitions win.

Definition at line 57 of file test_props_modularity.py.

◆ test_measured_data_refuses_outside_its_grid_rather_than_extrapolating()

None test_props_modularity.test_measured_data_refuses_outside_its_grid_rather_than_extrapolating ( )

An extrapolated measurement has a measurement's authority and a guess's
accuracy, so the backend must decline instead.

Definition at line 153 of file test_props_modularity.py.

◆ test_measured_data_rejects_unregistered_properties()

None test_props_modularity.test_measured_data_rejects_unregistered_properties ( )

A table of numbers with no declared unit is not data, it is a guess.

Definition at line 163 of file test_props_modularity.py.

◆ test_measured_data_wins_where_it_has_coverage()

None test_props_modularity.test_measured_data_wins_where_it_has_coverage ( )

The Phase 12 principle, working in Phase 01.

A measured grid in front of the equation of state overrides it inside the
measured region and falls through outside it -- and nobody writes the "do
we have data here?" branch, because the chain is that branch.

Definition at line 124 of file test_props_modularity.py.

◆ test_shipped_species_are_declared_as_data_not_code()

None test_props_modularity.test_shipped_species_are_declared_as_data_not_code ( )

species.toml is the registry; the package holds no fluid list.

A guard against the obvious regression: someone adds a fluid by writing it
into Python because that felt quicker, and the data path quietly becomes
decorative.

Definition at line 189 of file test_props_modularity.py.

References tomllib_keys().

◆ tomllib_keys()

list[str] test_props_modularity.tomllib_keys ( Path path )

Definition at line 206 of file test_props_modularity.py.

Referenced by test_shipped_species_are_declared_as_data_not_code().

Variable Documentation

◆ _value

test_props_modularity._value = value

protected

Definition at line 95 of file test_props_modularity.py.

Functions

Variables