# coding=iso-8859-1
# TODO:
# -test graph generation APIs (from adjacency, etc..)
# -test del_node, del_edge methods
# -test Common.set method
import os
try:
from hashlib import sha256
except ImportError:
import sha
sha256 = sha.new
import subprocess
import pydot
import dot_parser
import unittest
DOT_BINARY_PATH = pydot.find_graphviz()['dot']
TEST_DIR = './'
REGRESSION_TESTS_DIR = os.path.join(TEST_DIR, 'graphs')
MY_REGRESSION_TESTS_DIR = os.path.join(TEST_DIR, 'my_tests')
class TestGraphAPI(unittest.TestCase):
def setUp(self):
self._reset_graphs()
def _reset_graphs(self):
self.graph_directed = pydot.Graph('testgraph', graph_type='digraph')
def test_keep_graph_type(self):
g = pydot.Dot(graph_name='Test', graph_type='graph')
self.assertEqual( g.get_type(), 'graph' )
g = pydot.Dot(graph_name='Test', graph_type='digraph')
self.assertEqual( g.get_type(), 'digraph' )
def test_add_style(self):
g = pydot.Dot(graph_name='Test', graph_type='graph')
node = pydot.Node('mynode')
node.add_style('abc')
self.assertEqual( node.get_style(), 'abc' )
node.add_style('def')
self.assertEqual( node.get_style(), 'abc,def' )
node.add_style('ghi')
self.assertEqual( node.get_style(), 'abc,def,ghi' )
def test_create_simple_graph_with_node(self):
g = pydot.Dot()
g.set_type('digraph')
node = pydot.Node('legend')
node.set("shape", 'box')
g.add_node(node)
node.set('label','mine')
self.assertEqual( g.to_string(), 'digraph G {\nlegend [shape=box, label=mine];\n}\n' )
def test_attribute_with_implicit_value(self):
d='digraph {\na -> b[label="hi", decorate];\n}'
g = pydot.graph_from_dot_data(d)
attrs = g.get_edges()[0].get_attributes()
self.assertEqual( 'decorate' in attrs, True )
def test_subgraphs(self):
g = pydot.Graph()
s = pydot.Subgraph("foo")
self.assertEqual( g.get_subgraphs(), [] )
self.assertEqual( g.get_subgraph_list(), [] )
g.add_subgraph(s)
self.assertEqual( g.get_subgraphs()[0].get_name(), s.get_name() )
self.assertEqual( g.get_subgraph_list()[0].get_name(), s.get_name() )
def test_graph_pickling(self):
import pickle
g = pydot.Graph()
s = pydot.Subgraph("foo")
g.add_subgraph(s)
g.add_edge( pydot.Edge('A','B') )
g.add_edge( pydot.Edge('A','C') )
g.add_edge( pydot.Edge( ('D','E') ) )
g.add_node( pydot.Node( 'node!' ) )
self.assertEqual( type(pickle.dumps(g)), str )
def test_unicode_ids(self):
node1 = '"aánñoöüé€"'
node2 = '"îôø®çßΩ"'
g = pydot.Dot()
g.set_charset('latin1')
g.add_node( pydot.Node( node1 ) )
g.add_node( pydot.Node( node2 ) )
g.add_edge( pydot.Edge( node1, node2 ) )
self.assertEqual( g.get_node(node1)[0].get_name(), node1 )
self.assertEqual( g.get_node(node2)[0].get_name(), node2 )
self.assertEqual( g.get_edges()[0].get_source(), node1 )
self.assertEqual( g.get_edges()[0].get_destination(), node2 )
#g2 = dot_parser.parse_dot_data( g.to_string() )
g2 = pydot.graph_from_dot_data( g.to_string() )
self.assertEqual( g2.get_node(node1)[0].get_name(), node1 )
self.assertEqual( g2.get_node(node2)[0].get_name(), node2 )
self.assertEqual( g2.get_edges()[0].get_source(), node1 )
self.assertEqual( g2.get_edges()[0].get_destination(), node2 )
def test_graph_with_shapefiles(self):
shapefile_dir = os.path.join(TEST_DIR, 'from-past-to-future')
dot_file = os.path.join( shapefile_dir, 'from-past-to-future.dot' )
pngs = dot_files = [ os.path.join(shapefile_dir, fname) for
fname in os.listdir(shapefile_dir) if fname.endswith('.png') ]
f = file( dot_file, 'rt' )
graph_data = f.read()
f.close()
#g = dot_parser.parse_dot_data(graph_data)
g = pydot.graph_from_dot_data(graph_data)
g.set_shape_files( pngs )
jpe_data = g.create( format='jpe' )
hexdigest = sha256(jpe_data).hexdigest()
hexdigest_original = self._render_with_graphviz(dot_file)
self.assertEqual( hexdigest, hexdigest_original )
def test_multiple_graphs(self):
graph_data = 'graph A { a->b };\ngraph B {c->d}'
#graphs = dot_parser.parse_dot_data(graph_data)
graphs = pydot.graph_from_dot_data(graph_data)
self.assertEqual( len(graphs), 2 )
self.assertEqual( [g.get_name() for g in graphs], ['A', 'B'] )
def _render_with_graphviz(self, filename):
p = subprocess.Popen(
( DOT_BINARY_PATH , '-Tjpe', ),
cwd = os.path.dirname(filename),
stdin=file(filename, 'rt'),
stderr=subprocess.PIPE, stdout=subprocess.PIPE)
stdout = p.stdout
stdout_output = list()
while True:
data = stdout.read()
if not data:
break
stdout_output.append(data)
stdout.close()
if stdout_output:
stdout_output = ''.join(stdout_output)
#pid, status = os.waitpid(p.pid, 0)
status = p.wait()
return sha256(stdout_output).hexdigest()
def _render_with_pydot(self, filename):
#f = file(filename, 'rt')
#graph_data = f.read()
#f.close()
#g = dot_parser.parse_dot_data(graph_data)
#g = pydot.parse_from_dot_data(graph_data)
g = pydot.graph_from_dot_file(filename)
if not isinstance( g, list ):
g = [g]
jpe_data = ''.join( [ _g.create( format='jpe' ) for _g in g ] )
return sha256(jpe_data).hexdigest()
def test_my_regression_tests(self):
self._render_and_compare_dot_files( MY_REGRESSION_TESTS_DIR )
def test_graphviz_regression_tests(self):
self._render_and_compare_dot_files( REGRESSION_TESTS_DIR )
def _render_and_compare_dot_files(self, directory):
dot_files = [ fname for fname in os.listdir(directory) if
fname.endswith('.dot') ] ##and fname.startswith('')]
for dot in dot_files:
#print 'Processing: %s' % dot
os.sys.stdout.write('#')
os.sys.stdout.flush()
fname = os.path.join(directory, dot)
try:
parsed_data_hexdigest = self._render_with_pydot(fname)
original_data_hexdigest = self._render_with_graphviz(fname)
except Exception, excp:
print 'Failed redering BAD(%s)' % dot
#print 'Error:', str(excp)
raise excp
if parsed_data_hexdigest != original_data_hexdigest:
print 'BAD(%s)' % dot
self.assertEqual( parsed_data_hexdigest, original_data_hexdigest )
def test_numeric_node_id(self):
self._reset_graphs()
self.graph_directed.add_node( pydot.Node(1) )
self.assertEqual( self.graph_directed.get_nodes()[0].get_name() , '1' )
def test_quoted_node_id(self):
self._reset_graphs()
self.graph_directed.add_node( pydot.Node('"node"') )
self.assertEqual( self.graph_directed.get_nodes()[0].get_name() , '"node"' )
def test_quoted_node_id_to_string_no_attributes(self):
self._reset_graphs()
self.graph_directed.add_node( pydot.Node('"node"') )
self.assertEqual( self.graph_directed.get_nodes()[0].to_string() , '"node";' )
def test_keyword_node_id(self):
self._reset_graphs()
self.graph_directed.add_node( pydot.Node('node') )
self.assertEqual( self.graph_directed.get_nodes()[0].get_name() , 'node' )
def test_keyword_node_id_to_string_no_attributes(self):
self._reset_graphs()
self.graph_directed.add_node( pydot.Node('node') )
self.assertEqual( self.graph_directed.get_nodes()[0].to_string() , '' )
def test_keyword_node_id_to_string_with_attributes(self):
self._reset_graphs()
self.graph_directed.add_node( pydot.Node('node', shape='box') )
self.assertEqual( self.graph_directed.get_nodes()[0].to_string() , 'node [shape=box];' )
def test_names_of_a_thousand_nodes(self):
self._reset_graphs()
names = set([ 'node_%05d' % i for i in xrange(10**4) ])
for name in names:
self.graph_directed.add_node( pydot.Node(name, label=name) )
self.assertEqual( set([ n.get_name() for n in self.graph_directed.get_nodes() ]), names )
def test_executable_not_found_exception(self):
paths = {'dot': 'invalid_executable_path'}
graph = pydot.Dot( 'graphname', graph_type='digraph' )
graph.set_graphviz_executables( paths )
self.assertRaises( pydot.InvocationException, graph.create )
def test_graph_add_node_argument_type(self):
self._reset_graphs()
self.assertRaises( TypeError, self.graph_directed.add_node, 1 )
self.assertRaises( TypeError, self.graph_directed.add_node, 'a' )
def test_graph_add_edge_argument_type(self):
self._reset_graphs()
self.assertRaises( TypeError, self.graph_directed.add_edge, 1 )
self.assertRaises( TypeError, self.graph_directed.add_edge, 'a' )
def test_graph_add_subgraph_argument_type(self):
self._reset_graphs()
self.assertRaises( TypeError, self.graph_directed.add_subgraph, 1 )
self.assertRaises( TypeError, self.graph_directed.add_subgraph, 'a' )
def test_quoting(self):
import string
g = pydot.Dot()
g.add_node(pydot.Node("test", label=string.printable))
#print g.to_string()
data = g.create( format='jpe' )
self.assertEqual( len(data) > 0, True )
if __name__ == '__main__':
suite = unittest.TestLoader().loadTestsFromTestCase( TestGraphAPI )
unittest.TextTestRunner(verbosity=2).run(suite)