def test_textual_representation_can_be_rendered_for_an_empty_mesh(self):
# GIVEN an empty mesh
m = Mesh()
# WHEN the textual representation is rendered
out = render(m, self.JSON_TEMPLATE)
# THEN the rendered output reflects that of an empty mesh
out_data = json.loads(out)
self.assertEqual({'components': [], 'connections': [], 'resources': []}, out_data)
def test_custom_filters_can_be_injected_into_the_template_renderer(self):
# GIVEN an arbitrary mesh
m = Mesh()
m.add_component('My component')
m.add_component('Another component')
# WHEN it is rendered using a custom filter
template = '{% for c in components %}{{c.name|my_filter}};{% endfor %}'
filters = {'my_filter': lambda s: s.replace('o', '0')}
out = render(m, template, custom_filters=filters)
# THEN the output reflects the rendered mesh with the filtes applied
self.assertEqual('My c0mp0nent;An0ther c0mp0nent;', out)
def test_textual_representation_can_be_rendered_for_a_populated_mesh(self):
# GIVEN the following mesh
#
# _____________ _____________
# | A | | B |
# |-------------| |-------------|
# | | n1 |----------->| p1 | |
# | |______| |______| nY |----->[ Resource Y ]
# | | n2 |-----+ +-->| p2 | |
# |______|______| | | |______|______|
# +- | -+
# | |
# _____________ | | _____________
# | C | | | | D |
# |-------------| | | |-------------|
# | | nX |--+ +---->| pX | nX |------>[ Resource X ]
# |______|______| |______|______|
#
m = Mesh()
m.add_component('A', needs_ports=['n1', 'n2'])
m.add_component('B', provides_ports=['p1', 'p2'], needs_ports=['nY'])
m.add_component('C', needs_ports=['nX'])
m.add_component('D', provides_ports=['pX'], needs_ports=['nX'])
m.add_resource('Resource X')
m.add_resource('Resource Y')
m.add_connection('A', 'n1', 'B', 'p1')
m.add_connection('A', 'n2', 'D', 'pX')
m.add_connection('C', 'nX', 'B', 'p2')
m.add_connection_to_resource('D', 'nX', 'Resource X')
m.add_connection_to_resource('B', 'nY', 'Resource Y')
# WHEN the textual representation is rendered
out = render(m, self.JSON_TEMPLATE)
# THEN the rendered output reflects that of the mesh
out_data = json.loads(out)
self.assertEqual({
'components': [
{'name': 'A', 'needs_ports': ['n1', 'n2'], 'provides_ports': []},
{'name': 'B', 'needs_ports': ['nY'], 'provides_ports': ['p1', 'p2']},
{'name': 'C', 'needs_ports': ['nX'], 'provides_ports': []},
{'name': 'D', 'needs_ports': ['nX'], 'provides_ports': ['pX']},
],
'resources': ['Resource X', 'Resource Y'],
'connections': [
{
'consumer_component': 'A',
'consumer_port': 'n1',
'producer_component': 'B',
'producer_port': 'p1',
},
{
'consumer_component': 'A',
'consumer_port': 'n2',
'producer_component': 'D',
'producer_port': 'pX',
},
{
'consumer_component': 'C',
'consumer_port': 'nX',
'producer_component': 'B',
'producer_port': 'p2',
},
{
'consumer_component': 'D',
'consumer_port': 'nX',
'resource': 'Resource X',
},
{
'consumer_component': 'B',
'consumer_port': 'nY',
'resource': 'Resource Y',
},
],
}, out_data)