def test_4(self):
app = pya.Application.instance()
mw = app.main_window()
mw.close_all()
mw.load_layout(os.getenv("TESTSRC") + "/testdata/gds/t11.gds", 1)
mw.load_layout(os.getenv("TESTSRC") + "/testdata/gds/t10.gds", 2)
cv = mw.current_view()
cv.clear_layers()
pos = cv.end_layers()
self.assertEqual(pos.current().is_valid(), False)
cv.insert_layer(pos, pya.LayerProperties())
new_p = pya.LayerProperties()
new_p.source = "1/0@1"
pos.current().add_child(new_p)
self.assertEqual(pos.current().visible_(True), True)
self.assertEqual(pos.current().visible_(False), True)
self.assertEqual(pos.first_child().current().visible_(True), True)
self.assertEqual(pos.first_child().current().visible_(False), True)
pos.current().visible = False
self.assertEqual(pos.current().visible_(True), False)
self.assertEqual(pos.current().visible_(False), False)
self.assertEqual(pos.first_child().current().visible_(True), False)
self.assertEqual(pos.first_child().current().visible_(False), True)
mw.close_all()
def test_5(self):
app = pya.Application.instance()
mw = app.main_window()
mw.close_all()
mw.load_layout(os.getenv("TESTSRC") + "/testdata/gds/t11.gds", 1)
cv = mw.current_view()
cv.clear_layers()
new_p = pya.LayerProperties()
new_p.source = "1/0@1"
cv.insert_layer(0, cv.end_layers(), new_p)
new_p = pya.LayerProperties()
new_p.source = "2/0@1"
cv.insert_layer(0, cv.end_layers(), new_p)
pos = cv.begin_layers()
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "1/0@1\n2/0@1\n")
self.assertEqual(pos.at_end(), False)
self.assertEqual(pos.current().source, "1/0@1")
self.assertEqual(pos.current().is_valid(), True)
pos.current().delete()
self.assertEqual(pos.current().source, "2/0@1")
self.assertEqual(pos.current().is_valid(), True)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "2/0@1\n")
self.assertEqual(pos.at_end(), False)
pos.current().delete()
self.assertEqual(pos.current().is_valid(), False)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "")
self.assertEqual(pos.at_end(), True)
pos.current().delete()
self.assertEqual(pos.current().is_valid(), False)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "")
self.assertEqual(pos.at_end(), True)
# With hierarchy
cv.clear_layers()
new_p = pya.LayerProperties()
new_p.source = "1/0@1"
cv.insert_layer(0, cv.end_layers(), new_p)
new_p = pya.LayerProperties()
new_p.source = "2/0@1"
cv.insert_layer(0, cv.end_layers(), new_p)
new_p = pya.LayerProperties()
new_p.source = "3/0@1"
cv.insert_layer(0, cv.end_layers(), new_p)
pos = cv.begin_layers()
pos.next_sibling(1)
c1 = pos.current().add_child()
c1.source = "21/0@1"
c2 = pos.current().add_child()
c2.source = "22/0@1"
posn = cv.begin_layers()
posn.next_sibling(2)
c3 = posn.current().add_child()
c3.source = "31/0@1"
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "1/0@1\n2/0@1\n 21/0@1\n 22/0@1\n3/0@1\n 31/0@1\n")
pc = pos.first_child()
self.assertEqual(pc.current().source, "21/0@1")
self.assertEqual(pc.current().is_valid(), True)
self.assertEqual(pc.at_end(), False)
pc.current().delete()
self.assertEqual(pc.current().source, "22/0@1")
self.assertEqual(pc.current().is_valid(), True)
self.assertEqual(pc.at_end(), False)
pc.current().delete()
self.assertEqual(pc.at_end(), True)
self.assertEqual(pc.current().is_valid(), False)
mw.close_all()
def test_1(self):
app = pya.Application.instance()
mw = app.main_window()
mw.close_all()
mw.load_layout(os.getenv("TESTSRC") + "/testdata/gds/t11.gds", 1)
mw.load_layout(os.getenv("TESTSRC") + "/testdata/gds/t10.gds", 2)
cv = mw.current_view()
cv.clear_layers()
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "")
pos = cv.end_layers()
self.assertEqual(pos.parent().is_null(), True)
p = pos.dup()
p.up()
self.assertEqual(p.is_null(), True)
self.assertEqual(pos.is_null(), False)
self.assertEqual(pos == cv.begin_layers(), True)
self.assertEqual(pos != cv.begin_layers(), False)
l1 = cv.insert_layer(pos, pya.LayerProperties())
self.assertEqual(pos == cv.begin_layers(), True)
self.assertEqual(pos != cv.begin_layers(), False)
self.assertEqual(pos == cv.end_layers(), False)
self.assertEqual(pos != cv.end_layers(), True)
self.assertEqual(pos < cv.end_layers(), True)
self.assertEqual(cv.end_layers() < pos, False)
self.assertEqual(pos < cv.begin_layers(), False)
self.assertEqual(cv.begin_layers() < pos, False)
self.assertEqual(pos.at_top(), True)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n")
new_p = pya.LayerProperties()
new_p.source = "1/0@1"
l11 = cv.insert_layer(pos.last_child(), new_p)
p12 = pos.last_child()
self.assertEqual(p12.parent().is_null(), False)
self.assertEqual(p12.parent() == pos, True)
pp = pos.dup()
pp.down_last_child()
self.assertEqual(pp == p12, True)
self.assertEqual(pp == pos, False)
self.assertEqual(pp.parent() == pos, True)
pp.up()
self.assertEqual(pp == pos, True)
self.assertEqual(p12.at_top(), False)
p12.to_sibling(0)
self.assertEqual(p12 == pos.first_child(), True)
self.assertEqual(p12.child_index(), 0)
p12.to_sibling(1)
self.assertEqual(p12.child_index(), 1)
self.assertEqual(p12 == pos.last_child(), True)
self.assertEqual(p12.num_siblings(), 1)
l12 = cv.insert_layer(p12, pya.LayerProperties())
l12_new = pya.LayerProperties()
l12_new.source = "1/0@2"
cv.set_layer_properties(p12, l12_new)
self.assertEqual(p12.current().cellview(), 1)
self.assertEqual(p12.current().has_upper_hier_level(True), False)
self.assertEqual(p12.current().has_lower_hier_level(True), False)
l12_new.source = "@* #1..2"
cv.set_layer_properties(p12, l12_new)
self.assertEqual(p12.current().cellview(), 0)
self.assertEqual(p12.current().has_upper_hier_level(True), True)
self.assertEqual(p12.current().has_upper_hier_level(), True)
self.assertEqual(p12.current().upper_hier_level_(True), 2)
self.assertEqual(p12.current().upper_hier_level, 2)
self.assertEqual(p12.current().has_lower_hier_level(True), True)
self.assertEqual(p12.current().has_lower_hier_level(), True)
self.assertEqual(p12.current().lower_hier_level_(True), 1)
self.assertEqual(p12.current().lower_hier_level, 1)
l12_new.source = "@* (0,0 *0.5) (0,5 r45 *2.5)"
cv.set_layer_properties(p12, l12_new)
trans = p12.current().trans_(True)
self.assertEqual(str(trans), str(p12.current().trans))
self.assertEqual(len(trans), 2)
self.assertEqual(str(trans [0]), "r0 *0.5 0,0")
self.assertEqual(str(trans [1]), "r45 *2.5 0,5")
l12_new.source = "1/0@2"
cv.set_layer_properties(p12, l12_new)
self.assertEqual(p12.num_siblings(), 2)
pos = cv.end_layers()
new_p = pya.LayerProperties()
new_p.source = "@1"
l2 = cv.insert_layer(pos, new_p)
new_p = pya.LayerProperties()
new_p.source = "7/0@*"
l21 = cv.insert_layer(pos.first_child(), new_p)
p22 = pos.last_child()
new_p = pya.LayerProperties()
l22 = cv.insert_layer(pos.last_child(), new_p)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n 1/0@2\n*/*@1\n 7/0@1\n */*@1\n")
new_p = l2.dup()
new_p.source = "@2"
cv.set_layer_properties(pos, new_p)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n 1/0@2\n*/*@2\n 7/0@2\n */*@2\n")
pos.first_child().current().source = "7/0@1"
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n 1/0@2\n*/*@2\n 7/0@1\n */*@2\n")
pos.current().source = "@*"
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n 1/0@2\n*/*@*\n 7/0@1\n */*@*\n")
pos.current().source = "@2"
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n 1/0@2\n*/*@2\n 7/0@1\n */*@2\n")
pos.first_child().current().source = "7/1@*"
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n 1/0@2\n*/*@2\n 7/1@2\n */*@2\n")
pos.first_child().current().source = "7/0@*"
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n 1/0@2\n*/*@2\n 7/0@2\n */*@2\n")
l22_new = pya.LayerProperties()
l22_new.source = "7/1@*"
cv.replace_layer_node(p22, l22_new)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n 1/0@2\n*/*@2\n 7/0@2\n 7/1@2\n")
cv.delete_layer(p22)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n 1/0@2\n*/*@2\n 7/0@2\n")
new_p = l2.dup()
new_p.source = "%5@2"
cv.set_layer_properties(pos, new_p)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n 1/0@2\n%5@2\n %5@2\n")
mw.close_all()
def test_3(self):
app = pya.Application.instance()
mw = app.main_window()
mw.close_all()
mw.load_layout(os.getenv("TESTSRC") + "/testdata/gds/t11.gds", pya.LoadLayoutOptions(), "", 1)
mw.load_layout(os.getenv("TESTSRC") + "/testdata/gds/t10.gds", pya.LoadLayoutOptions(), "", 2)
cv = mw.current_view()
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "1/0@1\n2/0@1\n1/0@2\n2/0@2\n3/0@2\n3/1@2\n4/0@2\n5/0@2\n6/0@2\n6/1@2\n7/0@2\n8/0@2\n8/1@2\n")
cv.clear_layers()
pos = cv.end_layers()
self.assertEqual(pos.current().is_valid(), False)
cv.insert_layer(pos, pya.LayerProperties())
self.assertEqual(pos.current().is_valid(), True)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n")
self.assertEqual(self.lnodes_str2(cv), "*/*@*")
self.assertEqual(cv.begin_layers().current().name, "")
self.assertEqual(cv.begin_layers().current().visible, True)
self.assertEqual(cv.begin_layers().current().dither_pattern, -1)
self.assertEqual(cv.begin_layers().current().line_style, -1)
self.assertEqual(cv.begin_layers().current().valid, True)
self.assertEqual(cv.begin_layers().current().transparent, False)
# test LayerPropertiesNodeRef
pos.current().name = "NAME"
pos.current().visible = False
pos.current().fill_color = 0xff012345
pos.current().frame_color = 0xff123456
pos.current().fill_brightness = 42
pos.current().frame_brightness = 17
pos.current().dither_pattern = 4
pos.current().line_style = 3
pos.current().valid = False
pos.current().transparent = True
pos.current().marked = False
pos.current().xfill = False
pos.current().width = 2
pos.current().animation = 2
self.assertEqual(cv.begin_layers().current().name, "NAME")
self.assertEqual(cv.begin_layers().current().visible, False)
self.assertEqual(cv.begin_layers().current().fill_color, 0xff012345)
self.assertEqual(cv.begin_layers().current().frame_color, 0xff123456)
self.assertEqual(cv.begin_layers().current().fill_brightness, 42)
self.assertEqual(cv.begin_layers().current().frame_brightness, 17)
self.assertEqual(cv.begin_layers().current().dither_pattern, 4)
self.assertEqual(cv.begin_layers().current().line_style, 3)
self.assertEqual(cv.begin_layers().current().valid, False)
self.assertEqual(cv.begin_layers().current().transparent, True)
self.assertEqual(cv.begin_layers().current().marked, False)
self.assertEqual(cv.begin_layers().current().xfill, False)
self.assertEqual(cv.begin_layers().current().width, 2)
self.assertEqual(cv.begin_layers().current().animation, 2)
pos.current().valid = True
new_p = pya.LayerProperties()
new_p.source = "1/0@1"
self.assertEqual(new_p.flat().source, "1/0@1")
self.assertEqual(new_p == new_p.flat(), True)
self.assertEqual(new_p != new_p.flat(), False)
new_p_ref = pos.current().add_child(new_p)
self.assertEqual(new_p_ref.layer_index(), cv.cellview(0).layout().layer(1, 0))
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n")
self.assertEqual(self.lnodes_str2(cv), "*/*@*\n1/0@1")
p = pos.current().add_child()
p.source = "1/0@2"
self.assertEqual(p.is_valid(), True)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n 1/0@2\n")
self.assertEqual(self.lnodes_str2(cv), "*/*@*\n1/0@1\n1/0@2")
self.assertEqual(p.layer_index(), cv.cellview(1).layout().layer(1, 0))
self.assertEqual(str(p.bbox()), "(-1.4,1.8;25.16,3.8)")
self.assertEqual(p.view() == cv, True)
self.assertEqual(p.list_index(), 0)
l12_new = pya.LayerProperties()
l12_new.source = "@* #1..2"
self.assertEqual(l12_new.flat().source, "*/*@* #1..2")
self.assertEqual(pos.first_child().current().source, "1/0@1")
self.assertEqual(pos.first_child().current().is_valid(), True)
self.assertEqual(pos.last_child().current().is_valid(), False)
pos.first_child().next().current().assign(l12_new)
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n */*@* #1..2\n")
self.assertEqual(self.lnodes_str2(cv), "*/*@*\n1/0@1\n*/*@* #1..2")
pos.first_child().next_sibling(1).current().source = "@* #3..4"
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 1/0@1\n */*@* #3..4\n")
self.assertEqual(self.lnodes_str2(cv), "*/*@*\n1/0@1\n*/*@* #3..4")
pos.first_child().to_sibling(1).next_sibling(-1).current().source = "7/0"
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "*/*@*\n 7/0@1\n */*@* #3..4\n")
self.assertEqual(self.lnodes_str2(cv), "*/*@*\n7/0@1\n*/*@* #3..4")
self.assertEqual(self.lnodes_str3(cv, 0), "*/*@*\n7/0@1\n*/*@* #3..4")
self.assertEqual(self.lnodes_str3(cv, 1), "")
nn = pya.LayerPropertiesNode()
nn.source = "TOP"
nn1 = pya.LayerPropertiesNode()
nn1.source = "nn1"
nn2 = pya.LayerProperties()
nn2.source = "nn1"
nn1.add_child(nn2)
nn.add_child(nn1)
pos.current().assign(nn)
self.assertEqual(pos.current().id(), nn.id())
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "TOP@1\n nn1@1\n nn1@1\n")
self.assertEqual(self.lnodes_str2(cv), "TOP@1\nnn1@1\nnn1@1")
mw.close_all()
def test_1a(self):
app = pya.Application.instance()
mw = app.main_window()
mw.close_all()
mw.load_layout(os.getenv("TESTSRC") + "/testdata/gds/t11.gds", 1)
mw.load_layout(os.getenv("TESTSRC") + "/testdata/gds/t10.gds", 2)
cv = mw.current_view()
cv.clear_layers()
cv.insert_layer_list(1)
cv.rename_layer_list(1, "x")
self.assertEqual(cv.current_layer_list, 1)
cv.set_current_layer_list(0)
self.assertEqual(cv.current_layer_list, 0)
cv.set_current_layer_list(1)
self.assertEqual(cv.current_layer_list, 1)
self.assertEqual(self.lnodes_str("", cv.begin_layers(0)), "")
self.assertEqual(self.lnodes_str("", cv.begin_layers(1)), "")
pos = cv.end_layers(0)
self.assertEqual(pos.parent().is_null(), True)
p = pos.dup()
p.up()
self.assertEqual(p.is_null(), True)
self.assertEqual(pos.is_null(), False)
self.assertEqual(pos == cv.begin_layers(0), True)
self.assertEqual(pos != cv.begin_layers(0), False)
l1 = cv.insert_layer(0, pos, pya.LayerProperties())
self.assertEqual(pos == cv.begin_layers(0), True)
self.assertEqual(pos != cv.begin_layers(0), False)
self.assertEqual(pos == cv.end_layers(0), False)
self.assertEqual(pos != cv.end_layers(0), True)
self.assertEqual(pos < cv.end_layers(0), True)
self.assertEqual(cv.end_layers(0) < pos, False)
self.assertEqual(pos < cv.begin_layers(0), False)
self.assertEqual(cv.begin_layers(0) < pos, False)
self.assertEqual(pos.at_top(), True)
self.assertEqual(self.lnodes_str("", cv.begin_layers(0)), "*/*@*\n")
self.assertEqual(self.lnodes_str("", cv.begin_layers(1)), "")
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "")
new_p = pya.LayerProperties()
new_p.source = "1/0@1"
l11 = cv.insert_layer(0, pos.last_child(), new_p)
p12 = pos.last_child()
self.assertEqual(p12.parent().is_null(), False)
self.assertEqual(p12.parent() == pos, True)
pp = pos.dup()
pp.down_last_child()
self.assertEqual(pp == p12, True)
self.assertEqual(pp == pos, False)
self.assertEqual(pp.parent() == pos, True)
pp.up()
self.assertEqual(pp == pos, True)
self.assertEqual(p12.at_top(), False)
p12.to_sibling(0)
self.assertEqual(p12 == pos.first_child(), True)
self.assertEqual(p12.child_index(), 0)
p12.to_sibling(1)
self.assertEqual(p12.child_index(), 1)
self.assertEqual(p12 == pos.last_child(), True)
self.assertEqual(p12.num_siblings(), 1)
l12 = cv.insert_layer(0, p12, pya.LayerProperties())
l12_new = pya.LayerProperties()
l12_new.source = "1/0@2"
cv.set_layer_properties(0, p12, l12_new)
self.assertEqual(p12.current().cellview(), 1)
self.assertEqual(p12.current().has_upper_hier_level(True), False)
self.assertEqual(p12.current().has_upper_hier_level(), False)
self.assertEqual(p12.current().has_lower_hier_level(True), False)
self.assertEqual(p12.current().has_lower_hier_level(), False)
l12_new.source = "@* #1..2"
cv.set_layer_properties(0, p12, l12_new)
self.assertEqual(p12.current().cellview(), 0)
self.assertEqual(p12.current().has_upper_hier_level(True), True)
self.assertEqual(p12.current().has_upper_hier_level(), True)
self.assertEqual(p12.current().upper_hier_level_(True), 2)
self.assertEqual(p12.current().upper_hier_level, 2)
self.assertEqual(p12.current().has_lower_hier_level(True), True)
self.assertEqual(p12.current().has_lower_hier_level(), True)
self.assertEqual(p12.current().lower_hier_level_(True), 1)
self.assertEqual(p12.current().lower_hier_level, 1)
l12_new.source = "@* (0,0 *0.5) (0,5 r45 *2.5)"
cv.set_layer_properties(0, p12, l12_new)
trans = p12.current().trans_(True)
self.assertEqual(len(trans), 2)
self.assertEqual(str(trans [0]), "r0 *0.5 0,0")
self.assertEqual(str(trans [1]), "r45 *2.5 0,5")
l12_new.source = "1/0@2"
cv.set_layer_properties(0, p12, l12_new)
self.assertEqual(p12.num_siblings(), 2)
pos = cv.end_layers(0)
new_p = pya.LayerProperties()
new_p.source = "@1"
l2 = cv.insert_layer(0, pos, new_p)
new_p = pya.LayerProperties()
new_p.source = "7/0@*"
l21 = cv.insert_layer(0, pos.first_child(), new_p)
p22 = pos.last_child()
new_p = pya.LayerProperties()
l22 = cv.insert_layer(0, pos.last_child(), new_p)
self.assertEqual(self.lnodes_str("", cv.begin_layers(0)), "*/*@*\n 1/0@1\n 1/0@2\n*/*@1\n 7/0@1\n */*@1\n")
self.assertEqual(self.lnodes_str("", cv.begin_layers(1)), "")
self.assertEqual(self.lnodes_str("", cv.begin_layers()), "")
new_p = l2.dup()
new_p.source = "@2"
cv.set_layer_properties(0, pos, new_p)
self.assertEqual(self.lnodes_str("", cv.begin_layers(0)), "*/*@*\n 1/0@1\n 1/0@2\n*/*@2\n 7/0@2\n */*@2\n")
l22_new = pya.LayerProperties()
l22_new.source = "7/1@*"
cv.replace_layer_node(0, p22, l22_new)
self.assertEqual(self.lnodes_str("", cv.begin_layers(0)), "*/*@*\n 1/0@1\n 1/0@2\n*/*@2\n 7/0@2\n 7/1@2\n")
cv.delete_layer(0, p22)
self.assertEqual(self.lnodes_str("", cv.begin_layers(0)), "*/*@*\n 1/0@1\n 1/0@2\n*/*@2\n 7/0@2\n")
new_p = l2.dup()
new_p.source = "%5@2"
cv.set_layer_properties(0, pos, new_p)
self.assertEqual(self.lnodes_str("", cv.begin_layers(0)), "*/*@*\n 1/0@1\n 1/0@2\n%5@2\n %5@2\n")
# build a tree by building a separate tree
new_p = pya.LayerPropertiesNode()
self.assertEqual(new_p.has_children(), False)
n1 = new_p.add_child(pya.LayerProperties())
self.assertEqual(n1.has_children(), False)
n1.source = "101/0"
n2 = pya.LayerPropertiesNode()
self.assertEqual(n2.has_children(), False)
n21 = n2.add_child(pya.LayerProperties())
n21.source = "102/0"
self.assertEqual(n2.has_children(), True)
n22 = n2.add_child(pya.LayerProperties())
self.assertEqual(n2.has_children(), True)
n22.source = "103/0"
new_p.add_child(n2)
self.assertEqual(new_p.has_children(), True)
p = pos.last_child()
ll = cv.insert_layer(0, p, new_p)
self.assertEqual(p.current().has_children(), True)
self.assertEqual(p.first_child().current().has_children(), False)
self.assertEqual(p.first_child().current().source_(False), "101/0@1")
self.assertEqual(p.first_child().current().source, "%5@1")
# (test clear_children):
new_p.clear_children()
self.assertEqual(new_p.has_children(), False)
self.assertEqual(ll.has_children(), False)
cv.transaction("Delete")
li = cv.begin_layers(0)
a = []
while not li.at_end():
a.append(li.dup())
li.next()
self.assertEqual(len(a), 10)
cv.delete_layers(0, a)
self.assertEqual(cv.begin_layers(0).at_end(), True)
cv.commit()
mw.cm_undo()
self.assertEqual(cv.begin_layers(0).at_end(), False)
cv.transaction("Delete")
i = 0
while not cv.begin_layers(0).at_end():
cv.delete_layer(0, cv.begin_layers(0))
i += 1
self.assertEqual(i, 2)
self.assertEqual(cv.begin_layers(0).at_end(), True)
cv.commit()
mw.cm_undo()
self.assertEqual(cv.begin_layers(0).at_end(), False)
mw.close_all()