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import pytest
from textual.app import App
from textual.widgets import Select
from textual.widgets.select import EmptySelectError
async def test_empty_select_is_ok_with_blanks():
class SelectApp(App[None]):
def compose(self):
yield Select([])
app = SelectApp()
async with app.run_test():
# Sanity check:
assert app.query_one(Select).is_blank()
async def test_empty_set_options_is_ok_with_blanks():
class SelectApp(App[None]):
def compose(self):
yield Select([(str(n), n) for n in range(3)], value=0)
app = SelectApp()
async with app.run_test():
select = app.query_one(Select)
assert not select.is_blank() # Sanity check.
select.set_options([])
assert select.is_blank() # Sanity check.
async def test_empty_select_raises_exception_if_allow_blank_is_false():
class SelectApp(App[None]):
def compose(self):
yield Select([], allow_blank=False)
app = SelectApp()
with pytest.raises(EmptySelectError):
async with app.run_test():
pass
async def test_empty_set_options_raises_exception_if_allow_blank_is_false():
class SelectApp(App[None]):
def compose(self):
yield Select([(str(n), n) for n in range(3)], allow_blank=False)
app = SelectApp()
async with app.run_test():
select = app.query_one(Select)
assert not select.is_blank() # Sanity check.
with pytest.raises(EmptySelectError):
select.set_options([])
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