def test_rewind():
""" test rewind resets data """
o_put = Outputter(output_timestep=timedelta(minutes=30))
o_put.rewind()
assert o_put._model_start_time is None
assert o_put._next_output_time is None
assert not o_put._write_step
def test_output_timestep(model, output_ts, model_ts):
"""
test the partial functionality implemented in base class
For different output_timestep values as compared to model_timestep,
this test ensures the internal _write_step flag is set correcting when
outputting data. Since both the Renderer and NetCDFOutput call base method,
using super - testing that _write_step toggles correctly should be
sufficient
"""
o_put = Outputter(model._cache, output_timestep=output_ts)
model.duration = timedelta(hours=3)
model.time_step = model_ts
model.outputters += o_put
factor = math.ceil(float(output_ts.seconds) / model_ts.seconds)
# rewind and make sure outputter resets values
model.rewind()
assert o_put._model_start_time is None
assert o_put._next_output_time is None
assert not o_put._write_step
# call each part of model.step separately so we can validate
# how the outputter is setting its values, especially _write_step
for step_num in range(-1, model.num_time_steps - 1):
if step_num == -1:
model.setup_model_run()
assert o_put._model_start_time == model.start_time
assert o_put._next_output_time == (model.model_time +
o_put.output_timestep)
assert not o_put._write_step
else:
model.setup_time_step()
if o_put.output_timestep <= timedelta(seconds=model.time_step):
assert o_put._write_step # write every step
else:
if (step_num + 1) % factor == 0:
assert o_put._write_step
# No need to call following since outputter doesn't use them, but
# leave for completeness.
model.move_elements()
model.step_is_done()
model.current_time_step += 1
# no need to release elements or save to cache since we're not
# interested in the actual data - just want to see if the step_num
# should be written out or not
#model._cache.save_timestep(model.current_time_step, model.spills)
model.write_output()
# each outputter, like the Renderer or NetCDFOutputter will update the
# output timestep after completing the write_output method. Base class
# not designed to be included as an outputter for the Model, as it only
# implements partial functionality; need to manually update the output
# timestep below.
if o_put._write_step:
# no update happens for last time step
o_put._update_next_output_time(model.current_time_step,
model.model_time)
if model.current_time_step < model.num_time_steps - 1:
assert o_put._next_output_time == (model.model_time +
o_put.output_timestep)
# write_output checks to see if it is zero or last time step and if
# flags to output these steps are set. It changes _write_step
# accordingly
if model.current_time_step == 0:
assert (o_put._write_step if o_put.output_zero_step else
not o_put._write_step)
elif model.current_time_step == model.num_time_steps - 1:
assert (o_put._write_step if o_put.output_last_step else
not o_put._write_step)
print 'Completed step: {0}'.format(model.current_time_step)
def __init__(
self,
filename,
images_dir,
image_size=(800, 600),
cache=None,
output_timestep=None,
output_zero_step=True,
output_last_step=True,
draw_ontop='forecast',
**kwargs
):
"""
Init the image renderer.
Following args are passed to base class Outputter's init:
:param cache: sets the cache object from which to read data. The model
will automatically set this param
:param output_timestep: default is None in which case everytime the
write_output is called, output is written. If set, then output is
written every output_timestep starting from model_start_time.
:type output_timestep: timedelta object
:param output_zero_step: default is True. If True then output for
initial step (showing initial release conditions) is written
regardless of output_timestep
:type output_zero_step: boolean
:param output_last_step: default is True. If True then output for
final step is written regardless of output_timestep
:type output_last_step: boolean
:param draw_ontop: draw 'forecast' or 'uncertain' LEs on top. Default
is to draw 'forecast' LEs, which are in black on top
:type draw_ontop: str
Remaining kwargs are passed onto baseclass's __init__ with a direct
call: MapCanvas.__init__(..)
Optional parameters (kwargs)
:param projection_class: gnome.utilities.projections class to use.
Default is gnome.utilities.projections.FlatEarthProjection
:param map_BB: map bounding box. Default is to use
land_polygons.bounding_box. If land_polygons is None, then this is
the whole world, defined by ((-180,-90),(180, 90))
:param viewport: viewport of map -- what gets drawn and on what scale.
Default is to set viewport = map_BB
:param image_mode: Image mode ('P' for palette or 'L' for Black and
White image). BW_MapCanvas inherits from MapCanvas and sets the
mode to 'L'. Default image_mode is 'P'.
:param id: unique identifier for a instance of this class (UUID given
as a string). This is used when loading an object from a persisted
model.
"""
# set up the canvas
self._filename = filename
polygons = haz_files.ReadBNA(filename, 'PolygonSet')
Outputter.__init__(self, cache, output_timestep, output_zero_step,
output_last_step)
MapCanvas.__init__(self, image_size, land_polygons=polygons,
**kwargs)
self.images_dir = images_dir
self.last_filename = ''
self.draw_ontop = draw_ontop
