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3065 lines (2573 loc) · 103 KB
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# -*- coding: UTF-8 -*-
import os
import textwrap
import dash
from dash import Dash
from dash.dependencies import Input, Output, State, ClientsideFunction
from dash.exceptions import PreventUpdate
from dash.development.base_component import Component
import dash_html_components as html
import dash_core_components as dcc
import dash_renderer_test_components
from bs4 import BeautifulSoup
from selenium.webdriver.common.action_chains import ActionChains
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from .IntegrationTests import IntegrationTests
from .utils import wait_for
from multiprocessing import Value
import time
import re
import itertools
import json
import string
import plotly
import requests
TIMEOUT = 20
class Tests(IntegrationTests):
def setUp(self):
pass
def wait_for_style_to_equal(self, selector, style, assertion_style, timeout=TIMEOUT):
start = time.time()
exception = Exception('Time ran out, {} on {} not found'.format(
assertion_style, selector))
while time.time() < start + timeout:
element = self.wait_for_element_by_css_selector(selector)
try:
self.assertEqual(
assertion_style, element.value_of_css_property(style))
except Exception as e:
exception = e
else:
return
time.sleep(0.1)
raise exception
def wait_for_element_by_css_selector(self, selector, timeout=TIMEOUT):
return WebDriverWait(self.driver, timeout).until(
EC.presence_of_element_located((By.CSS_SELECTOR, selector)),
'Could not find element with selector "{}"'.format(selector)
)
def wait_for_text_to_equal(self, selector, assertion_text, timeout=TIMEOUT):
self.wait_for_element_by_css_selector(selector)
WebDriverWait(self.driver, timeout).until(
lambda *args: (
(str(self.wait_for_element_by_css_selector(selector).text)
== assertion_text) or
(str(self.wait_for_element_by_css_selector(selector).get_attribute('value'))
== assertion_text)
),
"Element '{}' text was supposed to equal '{}' but it didn't".format(
selector,
assertion_text
)
)
def clear_input(self, input_element):
(
ActionChains(self.driver)
.click(input_element)
.send_keys(Keys.HOME)
.key_down(Keys.SHIFT)
.send_keys(Keys.END)
.key_up(Keys.SHIFT)
.send_keys(Keys.DELETE)
).perform()
def request_queue_assertions(
self, check_rejected=True, expected_length=None):
request_queue = self.driver.execute_script(
'return window.store.getState().requestQueue'
)
self.assertTrue(
all([
(r['status'] == 200)
for r in request_queue
])
)
if check_rejected:
self.assertTrue(
all([
(r['rejected'] is False)
for r in request_queue
])
)
if expected_length is not None:
self.assertEqual(len(request_queue), expected_length)
def test_initial_state(self):
app = Dash(__name__)
my_class_attrs = {
'id': 'p.c.4',
'className': 'my-class',
'title': 'tooltip',
'style': {'color': 'red', 'fontSize': 30},
}
app.layout = html.Div([
'Basic string',
3.14,
True,
None,
html.Div('Child div with basic string', **my_class_attrs),
html.Div(id='p.c.5'),
html.Div([
html.Div('Grandchild div', id='p.c.6.p.c.0'),
html.Div([
html.Div('Great grandchild', id='p.c.6.p.c.1.p.c.0'),
3.14159,
'another basic string'
], id='p.c.6.p.c.1'),
html.Div([
html.Div(
html.Div([
html.Div([
html.Div(
id='p.c.6.p.c.2.p.c.0.p.c.p.c.0.p.c.0'
),
'',
html.Div(
id='p.c.6.p.c.2.p.c.0.p.c.p.c.0.p.c.2'
)
], id='p.c.6.p.c.2.p.c.0.p.c.p.c.0')
], id='p.c.6.p.c.2.p.c.0.p.c'),
id='p.c.6.p.c.2.p.c.0'
)
], id='p.c.6.p.c.2')
], id='p.c.6')
])
self.startServer(app)
el = self.wait_for_element_by_css_selector('#react-entry-point')
# Note: this .html file shows there's no undo/redo button by default
_dash_app_content_html = os.path.join(
os.path.dirname(__file__),
'test_assets', 'initial_state_dash_app_content.html')
with open(_dash_app_content_html) as fp:
rendered_dom = BeautifulSoup(fp.read().strip(), 'lxml')
fetched_dom = BeautifulSoup(el.get_attribute('outerHTML'), 'lxml')
self.assertEqual(
fetched_dom.decode(), rendered_dom.decode(),
"the fetching rendered dom is expected ")
# Check that no errors or warnings were displayed
self.assertTrue(self.is_console_clean())
self.assertEqual(
self.driver.execute_script(
'return JSON.parse(JSON.stringify('
'window.store.getState().layout'
'))'
),
json.loads(json.dumps(app.layout, cls=plotly.utils.PlotlyJSONEncoder)),
"the state layout is identical to app.layout"
)
r = requests.get('http://localhost:8050/_dash-dependencies')
self.assertEqual(r.status_code, 200)
self.assertEqual(
r.json(), [],
"no dependencies present in app as no callbacks are defined"
)
self.assertEqual(
self.driver.execute_script(
'return window.store.getState().paths'
),
{
abbr: [
int(token) if token in string.digits
else token.replace('p', 'props').replace('c', 'children')
for token in abbr.split('.')
]
for abbr in (
child.get('id')
for child in fetched_dom.find(
id='react-entry-point').findChildren(id=True)
)
},
"paths should refect to the component hierarchy"
)
self.request_queue_assertions(0)
self.percy_snapshot(name='layout')
self.assertTrue(self.is_console_clean())
def click_undo(self):
undo_selector = '._dash-undo-redo span:first-child div:last-child'
undo = self.wait_for_element_by_css_selector(undo_selector)
self.wait_for_text_to_equal(undo_selector, 'undo')
undo.click()
def click_redo(self):
redo_selector = '._dash-undo-redo span:last-child div:last-child'
self.wait_for_text_to_equal(redo_selector, 'redo')
redo = self.wait_for_element_by_css_selector(redo_selector)
redo.click()
def check_undo_redo_exist(self, has_undo, has_redo):
selector = '._dash-undo-redo span div:last-child'
els = self.driver.find_elements_by_css_selector(selector)
texts = (['undo'] if has_undo else []) + (['redo'] if has_redo else [])
self.assertEqual(len(els), len(texts))
for el, text in zip(els, texts):
self.assertEqual(el.text, text)
def test_undo_redo(self):
app = Dash(__name__, show_undo_redo=True)
app.layout = html.Div([dcc.Input(id='a'), html.Div(id='b')])
@app.callback(Output('b', 'children'), [Input('a', 'value')])
def set_b(a):
return a
self.startServer(app)
a = self.wait_for_element_by_css_selector('#a')
a.send_keys('xyz')
self.wait_for_text_to_equal('#b', 'xyz')
self.check_undo_redo_exist(True, False)
self.click_undo()
self.wait_for_text_to_equal('#b', 'xy')
self.check_undo_redo_exist(True, True)
self.click_undo()
self.wait_for_text_to_equal('#b', 'x')
self.check_undo_redo_exist(True, True)
self.click_redo()
self.wait_for_text_to_equal('#b', 'xy')
self.check_undo_redo_exist(True, True)
self.percy_snapshot(name='undo-redo')
self.click_undo()
self.click_undo()
self.wait_for_text_to_equal('#b', '')
self.check_undo_redo_exist(False, True)
def test_no_undo_redo(self):
app = Dash(__name__)
app.layout = html.Div([dcc.Input(id='a'), html.Div(id='b')])
@app.callback(Output('b', 'children'), [Input('a', 'value')])
def set_b(a):
return a
self.startServer(app)
a = self.wait_for_element_by_css_selector('#a')
a.send_keys('xyz')
self.wait_for_text_to_equal('#b', 'xyz')
toolbar = self.driver.find_elements_by_css_selector('._dash-undo-redo')
self.assertEqual(len(toolbar), 0)
def test_array_of_falsy_child(self):
app = Dash(__name__)
app.layout = html.Div(id='nully-wrapper', children=[0])
self.startServer(app)
self.wait_for_text_to_equal('#nully-wrapper', '0')
self.assertTrue(self.is_console_clean())
def test_of_falsy_child(self):
app = Dash(__name__)
app.layout = html.Div(id='nully-wrapper', children=0)
self.startServer(app)
self.wait_for_text_to_equal('#nully-wrapper', '0')
self.assertTrue(self.is_console_clean())
def test_simple_callback(self):
app = Dash(__name__)
app.layout = html.Div([
dcc.Input(
id='input',
value='initial value'
),
html.Div(
html.Div([
1.5,
None,
'string',
html.Div(id='output-1')
])
)
])
call_count = Value('i', 0)
@app.callback(Output('output-1', 'children'), [Input('input', 'value')])
def update_output(value):
call_count.value = call_count.value + 1
return value
self.startServer(app)
self.wait_for_text_to_equal('#output-1', 'initial value')
self.percy_snapshot(name='simple-callback-1')
input1 = self.wait_for_element_by_css_selector('#input')
self.clear_input(input1)
input1.send_keys('hello world')
self.wait_for_text_to_equal('#output-1', 'hello world')
self.percy_snapshot(name='simple-callback-2')
self.assertEqual(
call_count.value,
# an initial call to retrieve the first value + clear is now one
2 +
# one for each hello world character
len('hello world')
)
self.request_queue_assertions(
expected_length=1,
check_rejected=False)
self.assertTrue(self.is_console_clean())
def test_callbacks_generating_children(self):
''' Modify the DOM tree by adding new
components in the callbacks
'''
app = Dash(__name__)
app.layout = html.Div([
dcc.Input(
id='input',
value='initial value'
),
html.Div(id='output')
])
@app.callback(Output('output', 'children'), [Input('input', 'value')])
def pad_output(input):
return html.Div([
dcc.Input(
id='sub-input-1',
value='sub input initial value'
),
html.Div(id='sub-output-1')
])
call_count = Value('i', 0)
# these components don't exist in the initial render
app.config.supress_callback_exceptions = True
@app.callback(
Output('sub-output-1', 'children'),
[Input('sub-input-1', 'value')]
)
def update_input(value):
call_count.value = call_count.value + 1
return value
self.startServer(app)
wait_for(lambda: call_count.value == 1)
pad_input, pad_div = BeautifulSoup(
self.driver.find_element_by_css_selector(
'#react-entry-point').get_attribute('innerHTML'),
'lxml').select_one('#output > div').contents
self.assertEqual(pad_input.attrs['value'], 'sub input initial value')
self.assertEqual(pad_input.attrs['id'], 'sub-input-1')
self.assertEqual(pad_input.name, 'input')
self.assertTrue(
pad_div.text == pad_input.attrs['value']
and pad_div.get('id') == 'sub-output-1',
"the sub-output-1 content reflects to sub-input-1 value"
)
self.percy_snapshot(name='callback-generating-function-1')
# the paths should include these new output IDs
self.assertEqual(
self.driver.execute_script('return window.store.getState().paths'),
{
'input': [
'props', 'children', 0
],
'output': ['props', 'children', 1],
'sub-input-1': [
'props', 'children', 1,
'props', 'children',
'props', 'children', 0
],
'sub-output-1': [
'props', 'children', 1,
'props', 'children',
'props', 'children', 1
]
}
)
# editing the input should modify the sub output
sub_input = self.driver.find_element_by_id('sub-input-1')
sub_input.send_keys('deadbeef')
self.wait_for_text_to_equal(
'#sub-output-1',
pad_input.attrs['value'] + 'deadbeef')
self.assertEqual(
call_count.value, len('deadbeef') + 1,
"the total updates is initial one + the text input changes")
self.request_queue_assertions(call_count.value + 1)
self.percy_snapshot(name='callback-generating-function-2')
self.assertTrue(self.is_console_clean())
def test_radio_buttons_callbacks_generating_children(self):
self.maxDiff = 100 * 1000
app = Dash(__name__)
app.layout = html.Div([
dcc.RadioItems(
options=[
{'label': 'Chapter 1', 'value': 'chapter1'},
{'label': 'Chapter 2', 'value': 'chapter2'},
{'label': 'Chapter 3', 'value': 'chapter3'},
{'label': 'Chapter 4', 'value': 'chapter4'},
{'label': 'Chapter 5', 'value': 'chapter5'}
],
value='chapter1',
id='toc'
),
html.Div(id='body')
])
for script in dcc._js_dist:
app.scripts.append_script(script)
chapters = {
'chapter1': html.Div([
html.H1('Chapter 1', id='chapter1-header'),
dcc.Dropdown(
options=[{'label': i, 'value': i} for i in ['NYC', 'MTL', 'SF']],
value='NYC',
id='chapter1-controls'
),
html.Label(id='chapter1-label'),
dcc.Graph(id='chapter1-graph')
]),
# Chapter 2 has the some of the same components in the same order
# as Chapter 1. This means that they won't get remounted
# unless they set their own keys are differently.
# Switching back and forth between 1 and 2 implicitly
# tests how components update when they aren't remounted.
'chapter2': html.Div([
html.H1('Chapter 2', id='chapter2-header'),
dcc.RadioItems(
options=[{'label': i, 'value': i}
for i in ['USA', 'Canada']],
value='USA',
id='chapter2-controls'
),
html.Label(id='chapter2-label'),
dcc.Graph(id='chapter2-graph')
]),
# Chapter 3 has a different layout and so the components
# should get rewritten
'chapter3': [html.Div(
html.Div([
html.H3('Chapter 3', id='chapter3-header'),
html.Label(id='chapter3-label'),
dcc.Graph(id='chapter3-graph'),
dcc.RadioItems(
options=[{'label': i, 'value': i}
for i in ['Summer', 'Winter']],
value='Winter',
id='chapter3-controls'
)
])
)],
# Chapter 4 doesn't have an object to recursively
# traverse
'chapter4': 'Just a string',
}
call_counts = {
'body': Value('i', 0),
'chapter1-graph': Value('i', 0),
'chapter1-label': Value('i', 0),
'chapter2-graph': Value('i', 0),
'chapter2-label': Value('i', 0),
'chapter3-graph': Value('i', 0),
'chapter3-label': Value('i', 0),
}
@app.callback(Output('body', 'children'), [Input('toc', 'value')])
def display_chapter(toc_value):
call_counts['body'].value += 1
return chapters[toc_value]
app.config.supress_callback_exceptions = True
def generate_graph_callback(counterId):
def callback(value):
call_counts[counterId].value += 1
return {
'data': [{
'x': ['Call Counter'],
'y': [call_counts[counterId].value],
'type': 'bar'
}],
'layout': {'title': value}
}
return callback
def generate_label_callback(id):
def update_label(value):
call_counts[id].value += 1
return value
return update_label
for chapter in ['chapter1', 'chapter2', 'chapter3']:
app.callback(
Output('{}-graph'.format(chapter), 'figure'),
[Input('{}-controls'.format(chapter), 'value')]
)(generate_graph_callback('{}-graph'.format(chapter)))
app.callback(
Output('{}-label'.format(chapter), 'children'),
[Input('{}-controls'.format(chapter), 'value')]
)(generate_label_callback('{}-label'.format(chapter)))
self.startServer(app)
time.sleep(0.5)
wait_for(lambda: call_counts['body'].value == 1)
wait_for(lambda: call_counts['chapter1-graph'].value == 1)
wait_for(lambda: call_counts['chapter1-label'].value == 1)
self.assertEqual(call_counts['chapter2-graph'].value, 0)
self.assertEqual(call_counts['chapter2-label'].value, 0)
self.assertEqual(call_counts['chapter3-graph'].value, 0)
self.assertEqual(call_counts['chapter3-label'].value, 0)
def generic_chapter_assertions(chapter):
# each element should exist in the dom
paths = self.driver.execute_script(
'return window.store.getState().paths'
)
for key in paths:
self.driver.find_element_by_id(key)
if chapter == 'chapter3':
value = chapters[chapter][0][
'{}-controls'.format(chapter)
].value
else:
value = chapters[chapter]['{}-controls'.format(chapter)].value
# check the actual values
self.wait_for_text_to_equal('#{}-label'.format(chapter), value)
wait_for(
lambda: (
self.driver.execute_script(
'return document.'
'getElementById("{}-graph").'.format(chapter) +
'layout.title.text'
) == value
)
)
self.request_queue_assertions()
def chapter1_assertions():
paths = self.driver.execute_script(
'return window.store.getState().paths'
)
self.assertEqual(paths, {
'toc': ['props', 'children', 0],
'body': ['props', 'children', 1],
'chapter1-header': [
'props', 'children', 1,
'props', 'children',
'props', 'children', 0
],
'chapter1-controls': [
'props', 'children', 1,
'props', 'children',
'props', 'children', 1
],
'chapter1-label': [
'props', 'children', 1,
'props', 'children',
'props', 'children', 2
],
'chapter1-graph': [
'props', 'children', 1,
'props', 'children',
'props', 'children', 3
]
})
generic_chapter_assertions('chapter1')
chapter1_assertions()
self.percy_snapshot(name='chapter-1')
# switch chapters
(self.driver.find_elements_by_css_selector(
'input[type="radio"]'
)[1]).click()
# sleep just to make sure that no calls happen after our check
time.sleep(2)
self.percy_snapshot(name='chapter-2')
wait_for(lambda: call_counts['body'].value == 2)
wait_for(lambda: call_counts['chapter2-graph'].value == 1)
wait_for(lambda: call_counts['chapter2-label'].value == 1)
self.assertEqual(call_counts['chapter1-graph'].value, 1)
self.assertEqual(call_counts['chapter1-label'].value, 1)
def chapter2_assertions():
paths = self.driver.execute_script(
'return window.store.getState().paths'
)
self.assertEqual(paths, {
'toc': ['props', 'children', 0],
'body': ['props', 'children', 1],
'chapter2-header': [
'props', 'children', 1,
'props', 'children',
'props', 'children', 0
],
'chapter2-controls': [
'props', 'children', 1,
'props', 'children',
'props', 'children', 1
],
'chapter2-label': [
'props', 'children', 1,
'props', 'children',
'props', 'children', 2
],
'chapter2-graph': [
'props', 'children', 1,
'props', 'children',
'props', 'children', 3
]
})
generic_chapter_assertions('chapter2')
chapter2_assertions()
# switch to 3
(self.driver.find_elements_by_css_selector(
'input[type="radio"]'
)[2]).click()
# sleep just to make sure that no calls happen after our check
time.sleep(2)
self.percy_snapshot(name='chapter-3')
wait_for(lambda: call_counts['body'].value == 3)
wait_for(lambda: call_counts['chapter3-graph'].value == 1)
wait_for(lambda: call_counts['chapter3-label'].value == 1)
self.assertEqual(call_counts['chapter2-graph'].value, 1)
self.assertEqual(call_counts['chapter2-label'].value, 1)
self.assertEqual(call_counts['chapter1-graph'].value, 1)
self.assertEqual(call_counts['chapter1-label'].value, 1)
def chapter3_assertions():
paths = self.driver.execute_script(
'return window.store.getState().paths'
)
self.assertEqual(paths, {
'toc': ['props', 'children', 0],
'body': ['props', 'children', 1],
'chapter3-header': [
'props', 'children', 1,
'props', 'children', 0,
'props', 'children',
'props', 'children', 0
],
'chapter3-label': [
'props', 'children', 1,
'props', 'children', 0,
'props', 'children',
'props', 'children', 1
],
'chapter3-graph': [
'props', 'children', 1,
'props', 'children', 0,
'props', 'children',
'props', 'children', 2
],
'chapter3-controls': [
'props', 'children', 1,
'props', 'children', 0,
'props', 'children',
'props', 'children', 3
]
})
generic_chapter_assertions('chapter3')
chapter3_assertions()
# switch to 4
(self.driver.find_elements_by_css_selector(
'input[type="radio"]'
)[3]).click()
self.wait_for_text_to_equal('#body', 'Just a string')
self.percy_snapshot(name='chapter-4')
# each element should exist in the dom
paths = self.driver.execute_script(
'return window.store.getState().paths'
)
for key in paths:
self.driver.find_element_by_id(key)
self.assertEqual(paths, {
'toc': ['props', 'children', 0],
'body': ['props', 'children', 1]
})
# switch back to 1
(self.driver.find_elements_by_css_selector(
'input[type="radio"]'
)[0]).click()
time.sleep(0.5)
chapter1_assertions()
self.percy_snapshot(name='chapter-1-again')
def test_dependencies_on_components_that_dont_exist(self):
app = Dash(__name__)
app.layout = html.Div([
dcc.Input(id='input', value='initial value'),
html.Div(id='output-1')
])
# standard callback
output_1_call_count = Value('i', 0)
@app.callback(Output('output-1', 'children'), [Input('input', 'value')])
def update_output(value):
output_1_call_count.value += 1
return value
# callback for component that doesn't yet exist in the dom
# in practice, it might get added by some other callback
app.config.supress_callback_exceptions = True
output_2_call_count = Value('i', 0)
@app.callback(
Output('output-2', 'children'),
[Input('input', 'value')]
)
def update_output_2(value):
output_2_call_count.value += 1
return value
self.startServer(app)
self.wait_for_text_to_equal('#output-1', 'initial value')
self.percy_snapshot(name='dependencies')
time.sleep(1.0)
self.assertEqual(output_1_call_count.value, 1)
self.assertEqual(output_2_call_count.value, 0)
input = self.driver.find_element_by_id('input')
input.send_keys('a')
self.wait_for_text_to_equal('#output-1', 'initial valuea')
time.sleep(1.0)
self.assertEqual(output_1_call_count.value, 2)
self.assertEqual(output_2_call_count.value, 0)
self.request_queue_assertions(2)
self.assertTrue(self.is_console_clean())
def test_event_properties(self):
app = Dash(__name__)
app.layout = html.Div([
html.Button('Click Me', id='button'),
html.Div(id='output')
])
call_count = Value('i', 0)
@app.callback(Output('output', 'children'),
[Input('button', 'n_clicks')])
def update_output(n_clicks):
if(not n_clicks):
raise PreventUpdate
call_count.value += 1
return 'Click'
self.startServer(app)
btn = self.driver.find_element_by_id('button')
output = lambda: self.driver.find_element_by_id('output')
self.assertEqual(call_count.value, 0)
self.assertEqual(output().text, '')
btn.click()
wait_for(lambda: output().text == 'Click')
self.assertEqual(call_count.value, 1)
def test_event_properties_and_state(self):
app = Dash(__name__)
app.layout = html.Div([
html.Button('Click Me', id='button'),
dcc.Input(value='Initial State', id='state'),
html.Div(id='output')
])
call_count = Value('i', 0)
@app.callback(Output('output', 'children'),
[Input('button', 'n_clicks')],
[State('state', 'value')])
def update_output(n_clicks, value):
if(not n_clicks):
raise PreventUpdate
call_count.value += 1
return value
self.startServer(app)
btn = self.driver.find_element_by_id('button')
output = lambda: self.driver.find_element_by_id('output')
self.assertEqual(call_count.value, 0)
self.assertEqual(output().text, '')
btn.click()
wait_for(lambda: output().text == 'Initial State')
self.assertEqual(call_count.value, 1)
# Changing state shouldn't fire the callback
state = self.driver.find_element_by_id('state')
state.send_keys('x')
time.sleep(0.75)
self.assertEqual(output().text, 'Initial State')
self.assertEqual(call_count.value, 1)
btn.click()
wait_for(lambda: output().text == 'Initial Statex')
self.assertEqual(call_count.value, 2)
def test_event_properties_state_and_inputs(self):
app = Dash(__name__)
app.layout = html.Div([
html.Button('Click Me', id='button'),
dcc.Input(value='Initial Input', id='input'),
dcc.Input(value='Initial State', id='state'),
html.Div(id='output')
])
call_count = Value('i', 0)
@app.callback(Output('output', 'children'),
[Input('input', 'value'), Input('button', 'n_clicks')],
[State('state', 'value')])
def update_output(input, n_clicks, state):
call_count.value += 1
return 'input="{}", state="{}"'.format(input, state)
self.startServer(app)
btn = lambda: self.driver.find_element_by_id('button')
output = lambda: self.driver.find_element_by_id('output')
input = lambda: self.driver.find_element_by_id('input')
state = lambda: self.driver.find_element_by_id('state')
# callback gets called with initial input
self.assertEqual(
output().text,
'input="Initial Input", state="Initial State"'
)
btn().click()
wait_for(lambda: call_count.value == 2)
self.assertEqual(
output().text,
'input="Initial Input", state="Initial State"')
input().send_keys('x')
wait_for(lambda: call_count.value == 3)
self.assertEqual(
output().text,
'input="Initial Inputx", state="Initial State"')
state().send_keys('x')
time.sleep(0.75)
self.assertEqual(call_count.value, 3)
self.assertEqual(
output().text,
'input="Initial Inputx", state="Initial State"')
btn().click()
wait_for(lambda: call_count.value == 4)
self.assertEqual(
output().text,
'input="Initial Inputx", state="Initial Statex"')
def test_state_and_inputs(self):
app = Dash(__name__)
app.layout = html.Div([
dcc.Input(value='Initial Input', id='input'),
dcc.Input(value='Initial State', id='state'),
html.Div(id='output')
])
call_count = Value('i', 0)
@app.callback(
Output('output', 'children'), [Input('input', 'value')],
[State('state', 'value')])
def update_output(input, state):
call_count.value += 1
return 'input="{}", state="{}"'.format(input, state)
self.startServer(app)
output = lambda: self.driver.find_element_by_id('output')
input = lambda: self.driver.find_element_by_id('input')
state = lambda: self.driver.find_element_by_id('state')
# callback gets called with initial input
self.assertEqual(
output().text,
'input="Initial Input", state="Initial State"'
)
input().send_keys('x')
wait_for(lambda: call_count.value == 2)
self.assertEqual(
output().text,
'input="Initial Inputx", state="Initial State"')
state().send_keys('x')
time.sleep(0.75)
self.assertEqual(call_count.value, 2)
self.assertEqual(
output().text,
'input="Initial Inputx", state="Initial State"')
input().send_keys('y')
wait_for(lambda: call_count.value == 3)
self.assertEqual(
output().text,
'input="Initial Inputxy", state="Initial Statex"')
def test_event_properties_creating_inputs(self):
app = Dash(__name__)
ids = {
k: k for k in ['button', 'button-output', 'input', 'input-output']
}
app.layout = html.Div([
html.Button(id=ids['button']),
html.Div(id=ids['button-output'])
])
for script in dcc._js_dist:
script['namespace'] = 'dash_core_components'
app.scripts.append_script(script)
app.config.supress_callback_exceptions = True
call_counts = {
ids['input-output']: Value('i', 0),
ids['button-output']: Value('i', 0)