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# Copyright (c) 2002, 2003 by Intevation GmbH
# Authors:
# Bernhard Herzog <bh@intevation.de>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.
"""
Test the Session class
"""
__version__ = "$Revision: 1676 $"
# $Source$
# $Id: test_session.py 1676 2003-08-28 13:14:44Z bh $
import os
import unittest
import support
support.initthuban()
from Thuban.Model.messages import CHANGED, MAPS_CHANGED, FILENAME_CHANGED, \
MAP_PROJECTION_CHANGED, MAP_LAYERS_CHANGED, \
LAYER_VISIBILITY_CHANGED, LAYER_CHANGED, TABLE_REMOVED
from Thuban.Model.session import Session
from Thuban.Model.map import Map
from Thuban.Model.layer import Layer
from Thuban.Model.proj import Projection
from Thuban.Model.color import Color
from Thuban.Model.table import MemoryTable, FIELDTYPE_STRING, \
FIELDTYPE_INT, FIELDTYPE_DOUBLE
from Thuban.Model.data import DerivedShapeStore
from Thuban.Model.transientdb import TransientJoinedTable
class TestSessionSimple(unittest.TestCase):
"""Very simple test cases for Session"""
def setUp(self):
"""Initialize self.session to None"""
self.session = None
def tearDown(self):
"""Call self.session.Destroy() and reset self.session to None"""
self.session.Destroy()
self.session = None
def test_initial_state(self):
"""Test Session's initial state"""
session = self.session = Session("Test Session")
self.assertEquals(session.Title(), "Test Session")
self.assertEquals(session.Maps(), [])
self.assertEquals(session.Tables(), [])
self.assertEquals(session.ShapeStores(), [])
self.assertEquals(session.filename, None)
self.failIf(session.HasMaps())
self.failIf(session.WasModified())
def test_add_table(self):
"""Test Session.AddTable()"""
session = self.session = Session("Test Session")
memtable = MemoryTable([("type", FIELDTYPE_STRING),
("value", FIELDTYPE_DOUBLE),
("code", FIELDTYPE_INT)],
[("OTHER/UNKNOWN", -1.5, 11),
("RUINS", 0.0, 1),
("FARM", 3.141, 2),
("BUILDING", 2.5, 3),
("HUT", 1e6, 4),
("LIGHTHOUSE", -0.01, 5)])
# The session should be unmodified before the AddTable call and
# modified afterwards and of course the table should show up in
# Tables
self.failIf(session.WasModified())
table = session.AddTable(memtable)
self.assertEquals(session.Tables(), [table])
self.failUnless(session.WasModified())
def test_open_table_file(self):
"""Test Session.OpenTableFile()"""
session = self.session = Session("Test Session")
filename = os.path.join("..", "Data", "iceland",
"roads-line.dbf")
table = session.OpenTableFile(filename)
self.assertEquals(session.Tables(), [table])
def test_open_shapefile(self):
"""Test Session.OpenShapefile()"""
session = self.session = Session("Test Session")
filename = os.path.join("..", "Data", "iceland",
"roads-line.shp")
store = session.OpenShapefile(filename)
self.assertEquals(store.FileName(), os.path.abspath(filename))
# The filetype of a shapefile is "shapefile"
self.assertEquals(store.FileType(), "shapefile")
# The shapestore itself depends on nothing else
self.assertEquals(store.Dependencies(), ())
# The shapestore's table depends on the shapestore
self.assertEquals(store.Table().Dependencies(), (store,))
self.assertEquals(session.Tables(), [store.Table()])
def test_add_shapestore(self):
"""Test Session.AddShapeStore()"""
session = self.session = Session("Test Session")
filename = os.path.join("..", "Data", "iceland",
"roads-line.shp")
try:
store = session.OpenShapefile(filename)
derived = DerivedShapeStore(store, store.Table())
session.AddShapeStore(derived)
self.assertEquals(session.ShapeStores(), [store, derived])
finally:
store = derived = None
def test_unreferenced_tables(self):
"""Test Session.UnreferencedTables()"""
session = self.session = Session("Test Session")
filename = os.path.join("..", "Data", "iceland",
"roads-line.shp")
try:
store = session.OpenShapefile(filename)
filename = os.path.join("..", "Data", "iceland",
"roads-line.dbf")
table = session.OpenTableFile(filename)
self.assertEquals(session.Tables(), [table, store.Table()])
# The store's table is reference by the store, so the only
# unreferenced table is the roads-line table
self.assertEquals(session.UnreferencedTables(), [table])
finally:
store = table = None
class UnreferencedTablesTests(unittest.TestCase):
"""Test cases for the session.UnreferencedTables() method"""
def setUp(self):
"""Create a session with a few test tables"""
self.session = Session("Test Session")
memtable = MemoryTable([("type", FIELDTYPE_STRING),
("value", FIELDTYPE_DOUBLE),
("code", FIELDTYPE_INT)],
[("OTHER/UNKNOWN", -1.5, 11),
("RUINS", 0.0, 1),
("FARM", 3.141, 2),
("BUILDING", 2.5, 3),
("HUT", 1e6, 4),
("LIGHTHOUSE", -0.01, 5)])
self.memtable = self.session.AddTable(memtable)
filename = os.path.join("..", "Data", "iceland",
"roads-line.dbf")
self.roads_line = self.session.OpenTableFile(filename)
filename = os.path.join("..", "Data", "iceland",
"cultural_landmark-point.dbf")
self.landmarks = self.session.OpenTableFile(filename)
def tearDown(self):
"""Clear the session and layers"""
self.memtable = self.roads_line = self.landmarks = None
self.session.Destroy()
self.session = None
def test_unreferenced_tables(self):
"""Test Session.UnreferencedTables()"""
self.assertEquals(self.session.UnreferencedTables(),
[self.memtable, self.roads_line, self.landmarks])
def test_unreferenced_tables_with_joins(self):
"""Test Session.UnreferencedTables() with joins"""
joined = TransientJoinedTable(self.session.TransientDB(),
self.landmarks, "CLPTLABEL",
self.memtable, "type", outer_join = True)
try:
joined = self.session.AddTable(joined)
# After the join, landmarks and memtable are referenced by
# joined which in turn is referenced by nothing
self.assertEquals(self.session.UnreferencedTables(),
[self.roads_line, joined])
# Creating a DerivedShapeStore that references the joined table
# will remove it from the list of unreferenced tables,
store = self.session.OpenShapefile(
os.path.join("..", "Data", "iceland",
"cultural_landmark-point.dbf"))
derived = DerivedShapeStore(store, joined)
self.session.AddShapeStore(derived)
self.assertEquals(self.session.UnreferencedTables(),
[self.roads_line])
finally:
joined = derived = store = None
class TestSessionBase(unittest.TestCase, support.SubscriberMixin):
"""Base class for Session test cases that test the messages"""
def setUp(self):
"""
Clear the message list, create a session and subscribe to its messages
Bind the session to self.session.
"""
self.clear_messages()
# Create a Session and subscribe to all interesting channels.
self.session = Session("Test Session")
for channel in (CHANGED,
MAPS_CHANGED,
FILENAME_CHANGED,
MAP_PROJECTION_CHANGED,
MAP_LAYERS_CHANGED,
LAYER_VISIBILITY_CHANGED,
LAYER_CHANGED,
TABLE_REMOVED):
self.session.Subscribe(channel,
self.subscribe_with_params, channel)
def tearDown(self):
"""Destroy self.session and clear the message list"""
self.session.Destroy()
self.session = None
self.clear_messages()
class TestSessionMessages(TestSessionBase):
"""Simple Session test cases that test messges"""
def test_add_map(self):
"""Test Session.AddMap"""
self.failIf(self.session.WasModified())
map = Map("Some Map")
self.session.AddMap(map)
self.assert_(self.session.HasMaps())
self.assert_(self.session.WasModified())
self.assertEquals(self.session.Maps(), [map])
self.check_messages([(MAPS_CHANGED,),
(self.session, CHANGED)])
def test_set_filename(self):
"""Test Session.SetFilename"""
self.session.SetFilename("session_set_filename_test")
self.session.filename = "session_set_filename_test"
self.check_messages([(FILENAME_CHANGED,),
(self.session, CHANGED)])
def test_remove_table(self):
"""Test Session.RemoveTable()"""
memtable = MemoryTable([("type", FIELDTYPE_STRING),
("value", FIELDTYPE_DOUBLE),
("code", FIELDTYPE_INT)],
[("OTHER/UNKNOWN", -1.5, 11),
("RUINS", 0.0, 1),
("FARM", 3.141, 2),
("BUILDING", 2.5, 3),
("HUT", 1e6, 4),
("LIGHTHOUSE", -0.01, 5)])
table = self.session.AddTable(memtable)
self.assertEquals(self.session.Tables(), [table])
self.clear_messages()
self.session.RemoveTable(table)
self.check_messages([(table, TABLE_REMOVED),
(self.session, CHANGED)])
self.assertEquals(self.session.Tables(), [])
self.assertRaises(ValueError, self.session.RemoveTable, table)
class TestSessionWithContent(TestSessionBase):
"""Session test cases that start with a filled session."""
def setUp(self):
"""Extend the inherited method to add a non-empty map to self.session
"""
TestSessionBase.setUp(self)
open_shp = self.session.OpenShapefile
self.arc_layer = Layer("Roads",
open_shp(os.path.join("..", "Data", "iceland",
"roads-line.shp")))
self.poly_layer = Layer("Political",
open_shp(os.path.join("..", "Data", "iceland",
"political.shp")))
self.map = Map("A Map")
self.map.AddLayer(self.arc_layer)
self.map.AddLayer(self.poly_layer)
self.session.AddMap(self.map)
self.session.UnsetModified()
self.clear_messages()
def tearDown(self):
TestSessionBase.tearDown(self)
self.arc_layer = self.poly_layer = None
def test_remove_map(self):
"""Test Session.RemoveMap"""
self.session.RemoveMap(self.map)
self.assert_(self.session.WasModified())
self.failIf(self.session.HasMaps())
self.check_messages([(MAPS_CHANGED,),
(self.session, CHANGED)])
def test_tree_info(self):
"""Test Session.TreeInfo"""
self.assertEquals(self.session.TreeInfo(),
('Session: Test Session',
['Filename:',
'Unmodified',
self.map]))
def test_forward_map_projection(self):
"""Test Session forwarding of Map.SetProjection messages"""
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"])
self.map.SetProjection(proj)
self.check_messages([(self.map, MAP_PROJECTION_CHANGED),
(self.session, CHANGED)])
self.assert_(self.session.WasModified())
def test_forward_map_projection(self):
"""Test Session forwarding of Map.SetProjection messages"""
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"])
self.map.SetProjection(proj)
self.assert_(self.session.WasModified())
self.check_messages([(self.map, None, MAP_PROJECTION_CHANGED),
(self.session, CHANGED)])
def test_forwarding_fill(self):
"""Test Session's forwarding of Layer.SetFill messages"""
self.poly_layer.GetClassification().SetDefaultFill(Color(0.0, 0.5, 1.0))
self.assert_(self.session.WasModified())
self.check_messages([(self.poly_layer, LAYER_CHANGED),
(self.session, CHANGED)])
def test_forwarding_stroke(self):
"""Test Session's forwarding of Layer.SetStroke messages"""
self.poly_layer.GetClassification().\
SetDefaultLineColor(Color(0.0, 0.5, 1.0))
self.assert_(self.session.WasModified())
self.check_messages([(self.poly_layer, LAYER_CHANGED),
(self.session, CHANGED)])
def test_forwarding_stroke_width(self):
"""Test Session's forwarding of Layer.SetStrokeWidth messages"""
self.poly_layer.GetClassification().SetDefaultLineWidth(3)
self.assert_(self.session.WasModified())
self.check_messages([(self.poly_layer, LAYER_CHANGED),
(self.session, CHANGED)])
def test_forwarding_visibility(self):
"""Test Session's forwarding of Layer.SetVisible messages"""
self.poly_layer.SetVisible(0)
# Currently changing the visibility of a layer doesn't change
# the modification flag.
self.failIf(self.session.WasModified())
self.check_messages([(self.poly_layer, LAYER_VISIBILITY_CHANGED),
(self.session, CHANGED)])
def test_unset_modified_map(self):
"""Test Session.UnsetModified with map level changes"""
self.failIf(self.session.WasModified())
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"])
self.map.SetProjection(proj)
self.assert_(self.session.WasModified())
self.session.UnsetModified()
self.failIf(self.session.WasModified())
def test_unset_modified_layer(self):
"""Test Session.UnsetModified with layer level changes"""
self.failIf(self.session.WasModified())
self.poly_layer.GetClassification().SetDefaultLineWidth(3)
self.assert_(self.session.WasModified())
self.session.UnsetModified()
self.failIf(self.session.WasModified())
self.check_messages([(self.poly_layer, LAYER_CHANGED),
(self.session, CHANGED),
(CHANGED,)])
def test_shape_stores(self):
"""Test Session.ShapeStores()"""
# Strictly speaking the session doesn't make guarantees about
# the order of the ShapeStores in the list, but currently it's
# deterministic and they're listed in the order in which they
# were created
self.assertEquals(self.session.ShapeStores(),
[self.arc_layer.ShapeStore(),
self.poly_layer.ShapeStore()])
# If we remove the map from the session and clear our instance
# variables that hold the layers and the map the list should
# become empty again.
self.session.RemoveMap(self.map)
self.arc_layer = self.poly_layer = self.map = None
self.assertEquals(self.session.ShapeStores(), [])
def test_tables(self):
"""Test Session.Tables()"""
# Strictly speaking the session doesn't make guarantees about
# the order of the tables in the list, but currently it's
# deterministic and they're listed in the order in which they
# were opened
self.assertEquals(self.session.Tables(),
[self.arc_layer.ShapeStore().Table(),
self.poly_layer.ShapeStore().Table()])
# If we remove the map from the session and clear our instance
# variables that hold the layers and the map the list should
# become empty again.
self.session.RemoveMap(self.map)
self.arc_layer = self.poly_layer = self.map = None
self.assertEquals(self.session.Tables(), [])
if __name__ == "__main__":
unittest.main()
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