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import pytest
from textual.app import App
from textual.widgets import Select
from textual.widgets.select import InvalidSelectValueError
SELECT_OPTIONS = [(str(n), n) for n in range(3)]
MORE_OPTIONS = [(str(n), n) for n in range(5, 8)]
class SelectApp(App[None]):
def __init__(self, initial_value=Select.BLANK):
self.initial_value = initial_value
super().__init__()
def compose(self):
yield Select[int](SELECT_OPTIONS, value=self.initial_value)
async def test_initial_value_is_validated():
"""The initial value should be respected if it is a legal value.
Regression test for https://github.com/Textualize/textual/discussions/3037.
"""
app = SelectApp(1)
async with app.run_test():
assert app.query_one(Select).value == 1
async def test_value_unknown_option_raises_error():
"""Setting the value to an unknown value raises an error."""
app = SelectApp()
async with app.run_test():
with pytest.raises(InvalidSelectValueError):
app.query_one(Select).value = "french fries"
async def test_initial_value_inside_compose_is_validated():
"""Setting the value to an unknown value inside compose should raise an error."""
class SelectApp(App[None]):
def compose(self):
s = Select[int](SELECT_OPTIONS)
s.value = 73
yield s
app = SelectApp()
with pytest.raises(InvalidSelectValueError):
async with app.run_test():
pass
async def test_value_assign_to_blank():
"""Setting the value to BLANK should work with default `allow_blank` value."""
app = SelectApp(1)
async with app.run_test():
select = app.query_one(Select)
assert select.value == 1
select.value = Select.BLANK
assert select.is_blank()
async def test_initial_value_is_picked_if_allow_blank_is_false():
"""The initial value should be picked by default if allow_blank=False."""
class SelectApp(App[None]):
def compose(self):
yield Select[int](SELECT_OPTIONS, allow_blank=False)
app = SelectApp()
async with app.run_test():
assert app.query_one(Select).value == 0
async def test_initial_value_is_picked_if_allow_blank_is_false():
"""The initial value should be respected even if allow_blank=False."""
class SelectApp(App[None]):
def compose(self):
yield Select[int](SELECT_OPTIONS, value=2, allow_blank=False)
app = SelectApp()
async with app.run_test():
assert app.query_one(Select).value == 2
async def test_set_value_to_blank_with_allow_blank_false():
"""Setting the value to BLANK with allow_blank=False should raise an error."""
class SelectApp(App[None]):
def compose(self):
yield Select[int](SELECT_OPTIONS, allow_blank=False)
app = SelectApp()
async with app.run_test():
with pytest.raises(InvalidSelectValueError):
app.query_one(Select).value = Select.BLANK
async def test_set_options_resets_value_to_blank():
"""Resetting the options should reset the value to BLANK."""
class SelectApp(App[None]):
def compose(self):
yield Select[int](SELECT_OPTIONS, value=2)
app = SelectApp()
async with app.run_test():
select = app.query_one(Select)
assert select.value == 2
select.set_options(MORE_OPTIONS)
assert select.is_blank()
async def test_set_options_resets_value_if_allow_blank_is_false():
"""Resetting the options should reset the value if allow_blank=False."""
class SelectApp(App[None]):
def compose(self):
yield Select[int](SELECT_OPTIONS, allow_blank=False)
app = SelectApp()
async with app.run_test():
select = app.query_one(Select)
assert select.value == 0
select.set_options(MORE_OPTIONS)
assert select.value > 2
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