test_tank_runs_dry Namespace Reference

Functions
TankSim	_sim (float liquid_kg)
float	_held (TankState state)
float	_drain (TankSim sim, float dt, float mdot)
None	test_asked_for_more_than_it_holds_it_gives_all_and_books_the_rest ()
None	test_the_last_gram_is_delivered_not_dropped ()
None	test_a_tank_with_enough_is_untouched ()

Detailed Description

A tank gives what it holds, and books what it was asked for beyond that.

``TankSim.advance`` used to stop the outflow altogether once a tank was down
to a gram, while the network that asked for it went on delivering it: up to a
step of propellant the engine burned and no vessel gave. The session now ends
a coupling step where a tank runs out (``Session._dry_cut``); this is the
vessel's backstop under it. Checked against the arithmetic of the inputs:
what left the tank plus what was booked is what was asked for.

Function Documentation

_drain()

float test_tank_runs_dry._drain ( TankSim sim, float dt, float mdot )

protected

Advance with only a liquid outflow; return the mass that left [kg].

Definition at line 49 of file test_tank_runs_dry.py.

References _held().

Referenced by test_a_tank_with_enough_is_untouched(), test_asked_for_more_than_it_holds_it_gives_all_and_books_the_rest(), and test_the_last_gram_is_delivered_not_dropped().

_held()

float test_tank_runs_dry._held ( TankState state )

protected

Definition at line 45 of file test_tank_runs_dry.py.

Referenced by _drain().

_sim()

TankSim test_tank_runs_dry._sim ( float liquid_kg )

protected

Definition at line 23 of file test_tank_runs_dry.py.

Referenced by test_a_tank_with_enough_is_untouched(), test_asked_for_more_than_it_holds_it_gives_all_and_books_the_rest(), and test_the_last_gram_is_delivered_not_dropped().

test_a_tank_with_enough_is_untouched()

None test_tank_runs_dry.test_a_tank_with_enough_is_untouched

(

)

Definition at line 82 of file test_tank_runs_dry.py.

References _drain(), and _sim().

test_asked_for_more_than_it_holds_it_gives_all_and_books_the_rest()

None test_tank_runs_dry.test_asked_for_more_than_it_holds_it_gives_all_and_books_the_rest

(

)

Definition at line 62 of file test_tank_runs_dry.py.

References _drain(), and _sim().

test_the_last_gram_is_delivered_not_dropped()

None test_tank_runs_dry.test_the_last_gram_is_delivered_not_dropped

(

)

Below DRY_MASS the tank is empty to the panel, but what it holds still
flows: zeroing it -- what this did -- refused the step without booking.

Definition at line 71 of file test_tank_runs_dry.py.

References _drain(), and _sim().