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test_integration.py
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test_integration.py
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# -*- coding: utf-8 -*-
import base64
from datetime import datetime
import io
import os
import sys
import time
import json
import flask
import pandas as pd
import dash
from dash.dependencies import Input, Output, State
import dash_html_components as html
import dash_core_components as dcc
import dash_table_experiments as dt
from dash.exceptions import PreventUpdate
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.common.exceptions import InvalidElementStateException
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.keys import Keys
from textwrap import dedent
try:
from urlparse import urlparse
except ImportError:
from urllib.parse import urlparse
from .IntegrationTests import IntegrationTests
from .utils import wait_for
from multiprocessing import Value
# Download geckodriver: https://github.com/mozilla/geckodriver/releases
# And add to path:
# export PATH=$PATH:/Users/chriddyp/Repos/dash-stuff/dash-integration-tests
#
# Uses percy.io for automated screenshot tests
# export PERCY_PROJECT=plotly/dash-integration-tests
# export PERCY_TOKEN=...
TIMEOUT = 20
class Tests(IntegrationTests):
def setUp(self):
pass
def wait_for_element_by_css_selector(self, selector):
return WebDriverWait(self.driver, TIMEOUT).until(
EC.presence_of_element_located((By.CSS_SELECTOR, selector))
)
def wait_for_text_to_equal(self, selector, assertion_text):
WebDriverWait(self.driver, TIMEOUT).until(
EC.text_to_be_present_in_element((By.CSS_SELECTOR, selector),
assertion_text)
)
self.assertEqual(
assertion_text,
self.driver.find_element_by_css_selector(selector).text
)
def snapshot(self, name):
if 'PERCY_PROJECT' in os.environ and 'PERCY_TOKEN' in os.environ:
python_version = sys.version.split(' ')[0]
print('Percy Snapshot {}'.format(python_version))
self.percy_runner.snapshot(name=name)
def create_upload_component_content_types_test(self, filename):
app = dash.Dash(__name__)
filepath = os.path.join(os.getcwd(), 'test', 'upload-assets', filename)
pre_style = {
'whiteSpace': 'pre-wrap',
'wordBreak': 'break-all'
}
app.layout = html.Div([
html.Div(filepath, id='waitfor'),
html.Div(
id='upload-div',
children=dcc.Upload(
id='upload',
children=html.Div([
'Drag and Drop or ',
html.A('Select a File')
]),
style={
'width': '100%',
'height': '60px',
'lineHeight': '60px',
'borderWidth': '1px',
'borderStyle': 'dashed',
'borderRadius': '5px',
'textAlign': 'center'
}
)
),
html.Div(id='output'),
html.Div(dt.DataTable(rows=[{}]), style={'display': 'none'})
])
@app.callback(Output('output', 'children'),
[Input('upload', 'contents')])
def update_output(contents):
if contents is not None:
content_type, content_string = contents.split(',')
if 'csv' in filepath:
df = pd.read_csv(io.StringIO(base64.b64decode(
content_string).decode('utf-8')))
return html.Div([
dt.DataTable(
rows=df.to_dict('records'),
columns=['city', 'country']),
html.Hr(),
html.Div('Raw Content'),
html.Pre(contents, style=pre_style)
])
elif 'xls' in filepath:
df = pd.read_excel(io.BytesIO(base64.b64decode(
content_string)))
return html.Div([
dt.DataTable(
rows=df.to_dict('records'),
columns=['city', 'country']),
html.Hr(),
html.Div('Raw Content'),
html.Pre(contents, style=pre_style)
])
elif 'image' in content_type:
return html.Div([
html.Img(src=contents),
html.Hr(),
html.Div('Raw Content'),
html.Pre(contents, style=pre_style)
])
else:
return html.Div([
html.Hr(),
html.Div('Raw Content'),
html.Pre(contents, style=pre_style)
])
self.startServer(app)
try:
self.wait_for_element_by_css_selector('#waitfor')
except Exception as e:
print(self.wait_for_element_by_css_selector(
'#_dash-app-content').get_attribute('innerHTML'))
raise e
upload_div = self.wait_for_element_by_css_selector(
'#upload-div input[type=file]')
upload_div.send_keys(filepath)
time.sleep(5)
self.snapshot(filename)
def test_upload_csv(self):
self.create_upload_component_content_types_test('utf8.csv')
def test_upload_xlsx(self):
self.create_upload_component_content_types_test('utf8.xlsx')
def test_upload_png(self):
self.create_upload_component_content_types_test('dash-logo-stripe.png')
def test_upload_svg(self):
self.create_upload_component_content_types_test('dash-logo-stripe.svg')
def test_upload_gallery(self):
app = dash.Dash(__name__)
app.layout = html.Div([
html.Div(id='waitfor'),
html.Label('Empty'),
dcc.Upload(),
html.Label('Button'),
dcc.Upload(html.Button('Upload File')),
html.Label('Text'),
dcc.Upload('Upload File'),
html.Label('Link'),
dcc.Upload(html.A('Upload File')),
html.Label('Style'),
dcc.Upload([
'Drag and Drop or ',
html.A('Select a File')
], style={
'width': '100%',
'height': '60px',
'lineHeight': '60px',
'borderWidth': '1px',
'borderStyle': 'dashed',
'borderRadius': '5px',
'textAlign': 'center'
})
])
self.startServer(app)
try:
self.wait_for_element_by_css_selector('#waitfor')
except Exception as e:
print(self.wait_for_element_by_css_selector(
'#_dash-app-content').get_attribute('innerHTML'))
raise e
self.snapshot('test_upload_gallery')
def test_gallery(self):
app = dash.Dash(__name__)
app.layout = html.Div([
html.Div(id='waitfor'),
html.Label('Upload'),
dcc.Upload(),
html.Label('Horizontal Tabs'),
dcc.Tabs(id="tabs", children=[
dcc.Tab(label='Tab one', className='test', style={'border': '1px solid magenta'}, children=[
html.Div(['Test'])
]),
dcc.Tab(label='Tab two', children=[
html.Div([
html.H1("This is the content in tab 2"),
html.P("A graph here would be nice!")
])
], id='tab-one'),
dcc.Tab(label='Tab three', children=[
html.Div([
html.H1("This is the content in tab 3"),
])
]),
],
style={
'fontFamily': 'system-ui'
},
content_style={
'border': '1px solid #d6d6d6',
'padding': '44px'
},
parent_style={
'maxWidth': '1000px',
'margin': '0 auto'
}
),
html.Label('Vertical Tabs'),
dcc.Tabs(id="tabs1", vertical=True, children=[
dcc.Tab(label='Tab one', children=[
html.Div(['Test'])
]),
dcc.Tab(label='Tab two', children=[
html.Div([
html.H1("This is the content in tab 2"),
html.P("A graph here would be nice!")
])
]),
dcc.Tab(label='Tab three', children=[
html.Div([
html.H1("This is the content in tab 3"),
])
]),
]
),
html.Label('Dropdown'),
dcc.Dropdown(
options=[
{'label': 'New York City', 'value': 'NYC'},
{'label': u'Montréal', 'value': 'MTL'},
{'label': 'San Francisco', 'value': 'SF'},
{'label': u'北京', 'value': u'北京'}
],
value='MTL',
id='dropdown'
),
html.Label('Multi-Select Dropdown'),
dcc.Dropdown(
options=[
{'label': 'New York City', 'value': 'NYC'},
{'label': u'Montréal', 'value': 'MTL'},
{'label': 'San Francisco', 'value': 'SF'},
{'label': u'北京', 'value': u'北京'}
],
value=['MTL', 'SF'],
multi=True
),
html.Label('Radio Items'),
dcc.RadioItems(
options=[
{'label': 'New York City', 'value': 'NYC'},
{'label': u'Montréal', 'value': 'MTL'},
{'label': 'San Francisco', 'value': 'SF'},
{'label': u'北京', 'value': u'北京'}
],
value='MTL'
),
html.Label('Checkboxes'),
dcc.Checklist(
options=[
{'label': 'New York City', 'value': 'NYC'},
{'label': u'Montréal', 'value': 'MTL'},
{'label': 'San Francisco', 'value': 'SF'},
{'label': u'北京', 'value': u'北京'}
],
values=['MTL', 'SF']
),
html.Label('Text Input'),
dcc.Input(value='', placeholder='type here', type='text',
id='textinput'),
html.Label('Disabled Text Input'),
dcc.Input(value='disabled', type='text',
id='disabled-textinput', disabled=True),
html.Label('Slider'),
dcc.Slider(
min=0,
max=9,
marks={i: 'Label {}'.format(i) if i == 1 else str(i)
for i in range(1, 6)},
value=5,
),
html.Label('Graph'),
dcc.Graph(
id='graph',
figure={
'data': [{
'x': [1, 2, 3],
'y': [4, 1, 4]
}],
'layout': {
'title': u'北京'
}
}
),
html.Div([
html.Label('DatePickerSingle'),
dcc.DatePickerSingle(
id='date-picker-single',
date=datetime(1997, 5, 10)
),
html.Div([
html.Label('DatePickerSingle - empty input'),
dcc.DatePickerSingle(),
], id='dt-single-no-date-value'
),
html.Div([
html.Label('DatePickerSingle - initial visible month (May 97)'),
dcc.DatePickerSingle(
initial_visible_month=datetime(1997, 5, 10)
),
], id='dt-single-no-date-value-init-month'
),
]),
html.Div([
html.Label('DatePickerRange'),
dcc.DatePickerRange(
id='date-picker-range',
start_date=datetime(1997, 5, 3),
end_date_placeholder_text='Select a date!'
),
html.Div([
html.Label('DatePickerRange - empty input'),
dcc.DatePickerRange(
start_date_placeholder_text='Start date',
end_date_placeholder_text='End date'
),
], id='dt-range-no-date-values'
),
html.Div([
html.Label('DatePickerRange - initial visible month (May 97)'),
dcc.DatePickerRange(
start_date_placeholder_text='Start date',
end_date_placeholder_text='End date',
initial_visible_month=datetime(1997, 5, 10)
),
], id='dt-range-no-date-values-init-month'
),
]),
html.Label('TextArea'),
dcc.Textarea(
placeholder='Enter a value... 北京',
style={'width': '100%'}
),
html.Label('Markdown'),
dcc.Markdown('''
#### Dash and Markdown
Dash supports [Markdown](http://commonmark.org/help).
Markdown is a simple way to write and format text.
It includes a syntax for things like **bold text** and *italics*,
[links](http://commonmark.org/help), inline `code` snippets, lists,
quotes, and more.
北京
'''.replace(' ', '')),
dcc.Markdown(['# Line one', '## Line two']),
dcc.Markdown(),
dcc.SyntaxHighlighter(dedent('''import python
print(3)'''), language='python'),
dcc.SyntaxHighlighter([
'import python',
'print(3)'
], language='python'),
dcc.SyntaxHighlighter()
])
self.startServer(app)
self.wait_for_element_by_css_selector('#waitfor')
self.snapshot('gallery')
self.driver.find_element_by_css_selector(
'#dropdown .Select-input input'
).send_keys(u'北')
self.snapshot('gallery - chinese character')
text_input = self.driver.find_element_by_id('textinput')
disabled_text_input = self.driver.find_element_by_id(
'disabled-textinput')
text_input.send_keys('HODOR')
# It seems selenium errors when send(ing)_keys on a disabled element.
# In case this changes we try anyway and catch the particular
# exception. In any case Percy will snapshot the disabled input style
# so we are not totally dependent on the send_keys behaviour for
# testing disabled state.
try:
disabled_text_input.send_keys('RODOH')
except InvalidElementStateException:
pass
self.snapshot('gallery - text input')
# DatePickerSingle and DatePickerRange test
# for issue with datepicker when date value is `None`
dt_input_1 = self.driver.find_element_by_css_selector(
'#dt-single-no-date-value #date'
)
dt_input_1.click()
self.snapshot('gallery - DatePickerSingle\'s datepicker '
'when no date value and no initial month specified')
dt_input_1.send_keys("1997-05-03")
dt_input_2 = self.driver.find_element_by_css_selector(
'#dt-single-no-date-value-init-month #date'
)
dt_input_2.click()
self.snapshot('gallery - DatePickerSingle\'s datepicker '
'when no date value, but initial month is specified')
dt_input_2.send_keys("1997-05-03")
dt_input_3 = self.driver.find_element_by_css_selector(
'#dt-range-no-date-values #endDate'
)
dt_input_3.click()
self.snapshot('gallery - DatePickerRange\'s datepicker '
'when neither start date nor end date '
'nor initial month is specified')
dt_input_3.send_keys("1997-05-03")
dt_input_4 = self.driver.find_element_by_css_selector(
'#dt-range-no-date-values-init-month #endDate'
)
dt_input_4.click()
self.snapshot('gallery - DatePickerRange\'s datepicker '
'when neither start date nor end date is specified, '
'but initial month is')
dt_input_4.send_keys("1997-05-03")
def test_tabs_in_vertical_mode(self):
app = dash.Dash(__name__)
app.layout = html.Div([
dcc.Tabs(id="tabs", value='tab-3', children=[
dcc.Tab(label='Tab one', value='tab-1', id='tab-1', children=[
html.Div('Tab One Content')
]),
dcc.Tab(label='Tab two', value='tab-2', id='tab-2', children=[
html.Div('Tab Two Content')
]),
dcc.Tab(label='Tab three', value='tab-3', id='tab-3', children=[
html.Div('Tab Three Content')
]),
], vertical=True),
html.Div(id='tabs-content')
])
self.startServer(app=app)
self.wait_for_text_to_equal('#tab-3', 'Tab three')
self.snapshot('Tabs - vertical mode')
def test_tabs_without_children(self):
app = dash.Dash(__name__)
app.layout = html.Div([
html.H1('Dash Tabs component demo'),
dcc.Tabs(id="tabs", value='tab-2', children=[
dcc.Tab(label='Tab one', value='tab-1', id='tab-1'),
dcc.Tab(label='Tab two', value='tab-2', id='tab-2'),
]),
html.Div(id='tabs-content')
])
@app.callback(dash.dependencies.Output('tabs-content', 'children'),
[dash.dependencies.Input('tabs', 'value')])
def render_content(tab):
if(tab == 'tab-1'):
return html.Div([
html.H3('Test content 1')
], id='test-tab-1')
elif(tab == 'tab-2'):
return html.Div([
html.H3('Test content 2')
], id='test-tab-2')
self.startServer(app=app)
self.wait_for_text_to_equal('#tabs-content', 'Test content 2')
self.snapshot('initial tab - tab 2')
selected_tab = self.wait_for_element_by_css_selector('#tab-1')
selected_tab.click()
time.sleep(1)
self.wait_for_text_to_equal('#tabs-content', 'Test content 1')
def test_tabs_with_children_undefined(self):
app = dash.Dash(__name__)
app.layout = html.Div([
html.H1('Dash Tabs component demo'),
dcc.Tabs(id="tabs", value='tab-1'),
html.Div(id='tabs-content')
])
self.startServer(app=app)
self.snapshot('Tabs component with children undefined')
def test_tabs_render_without_selected(self):
app = dash.Dash(__name__)
data = [
{'id': 'one', 'value': 1},
{'id': 'two', 'value': 2},
]
menu = html.Div([
html.Div('one', id='one'),
html.Div('two', id='two')
])
tabs_one = html.Div([
dcc.Tabs([
dcc.Tab(dcc.Graph(id='graph-one'), label='tab-one-one'),
])
], id='tabs-one', style={'display': 'none'})
tabs_two = html.Div([
dcc.Tabs([
dcc.Tab(dcc.Graph(id='graph-two'), label='tab-two-one'),
])
], id='tabs-two', style={'display': 'none'})
app.layout = html.Div([
menu,
tabs_one,
tabs_two
])
for i in ('one', 'two'):
@app.callback(Output('tabs-{}'.format(i), 'style'),
[Input(i, 'n_clicks')])
def on_click(n_clicks):
if n_clicks is None:
raise PreventUpdate
if n_clicks % 2 == 1:
return {'display': 'block'}
return {'display': 'none'}
@app.callback(Output('graph-{}'.format(i), 'figure'),
[Input(i, 'n_clicks')])
def on_click(n_clicks):
if n_clicks is None:
raise PreventUpdate
return {
'data': [
{
'x': [1,2,3,4],
'y': [4,3,2,1]
}
]
}
self.startServer(app=app)
button_one = self.wait_for_element_by_css_selector('#one')
button_two = self.wait_for_element_by_css_selector('#two')
button_one.click()
# wait for tabs to be loaded after clicking
WebDriverWait(self.driver, 10).until(
EC.visibility_of_element_located((By.CSS_SELECTOR, "#graph-one .main-svg"))
)
time.sleep(1)
self.snapshot("Tabs 1 rendered ")
button_two.click()
# wait for tabs to be loaded after clicking
WebDriverWait(self.driver, 10).until(
EC.visibility_of_element_located((By.CSS_SELECTOR, "#graph-two .main-svg"))
)
time.sleep(1)
self.snapshot("Tabs 2 rendered ")
def test_tabs_without_value(self):
app = dash.Dash(__name__)
app.layout = html.Div([
html.H1('Dash Tabs component demo'),
dcc.Tabs(id="tabs-without-value", children=[
dcc.Tab(label='Tab One', value='tab-1'),
dcc.Tab(label='Tab Two', value='tab-2'),
]),
html.Div(id='tabs-content')
])
@app.callback(Output('tabs-content', 'children'),
[Input('tabs-without-value', 'value')])
def render_content(tab):
if tab == 'tab-1':
return html.H3('Default selected Tab content 1')
elif tab == 'tab-2':
return html.H3('Tab content 2')
self.startServer(app=app)
self.wait_for_text_to_equal('#tabs-content', 'Default selected Tab content 1')
self.snapshot('Tab 1 should be selected by default')
def test_graph_does_not_resize_in_tabs(self):
app = dash.Dash(__name__)
app.layout = html.Div([
html.H1('Dash Tabs component demo'),
dcc.Tabs(id="tabs-example", value='tab-1-example', children=[
dcc.Tab(label='Tab One', value='tab-1-example', id='tab-1'),
dcc.Tab(label='Tab Two', value='tab-2-example', id='tab-2'),
]),
html.Div(id='tabs-content-example')
])
@app.callback(Output('tabs-content-example', 'children'),
[Input('tabs-example', 'value')])
def render_content(tab):
if tab == 'tab-1-example':
return html.Div([
html.H3('Tab content 1'),
dcc.Graph(
id='graph-1-tabs',
figure={
'data': [{
'x': [1, 2, 3],
'y': [3, 1, 2],
'type': 'bar'
}]
}
)
])
elif tab == 'tab-2-example':
return html.Div([
html.H3('Tab content 2'),
dcc.Graph(
id='graph-2-tabs',
figure={
'data': [{
'x': [1, 2, 3],
'y': [5, 10, 6],
'type': 'bar'
}]
}
)
])
self.startServer(app=app)
tab_one = self.wait_for_element_by_css_selector('#tab-1')
tab_two = self.wait_for_element_by_css_selector('#tab-2')
WebDriverWait(self.driver, 10).until(
EC.element_to_be_clickable((By.ID, "tab-2"))
)
self.snapshot("Tabs with Graph - initial (graph should not resize)")
tab_two.click()
# wait for Graph's internal svg to be loaded after clicking
WebDriverWait(self.driver, 10).until(
EC.visibility_of_element_located((By.CSS_SELECTOR, "#graph-2-tabs .main-svg"))
)
self.snapshot("Tabs with Graph - clicked tab 2 (graph should not resize)")
WebDriverWait(self.driver, 10).until(
EC.element_to_be_clickable((By.ID, "tab-1"))
)
tab_one.click()
# wait for Graph to be loaded after clicking
WebDriverWait(self.driver, 10).until(
EC.visibility_of_element_located((By.CSS_SELECTOR, "#graph-1-tabs .main-svg"))
)
self.snapshot("Tabs with Graph - clicked tab 1 (graph should not resize)")
def test_location_link(self):
app = dash.Dash(__name__)
app.layout = html.Div([
html.Div(id='waitfor'),
dcc.Location(id='test-location', refresh=False),
dcc.Link(
html.Button('I am a clickable button'),
id='test-link',
href='/test/pathname'),
dcc.Link(
html.Button('I am a clickable hash button'),
id='test-link-hash',
href='#test'),
dcc.Link(
html.Button('I am a clickable search button'),
id='test-link-search',
href='?testQuery=testValue',
refresh=False),
html.Button('I am a magic button that updates pathname',
id='test-button'),
html.A('link to click', href='/test/pathname/a', id='test-a'),
html.A('link to click', href='#test-hash', id='test-a-hash'),
html.A('link to click', href='?queryA=valueA', id='test-a-query'),
html.Div(id='test-pathname', children=[]),
html.Div(id='test-hash', children=[]),
html.Div(id='test-search', children=[]),
])
@app.callback(
output=Output(component_id='test-pathname',
component_property='children'),
inputs=[Input(component_id='test-location', component_property='pathname')])
def update_location_on_page(pathname):
return pathname
@app.callback(
output=Output(component_id='test-hash',
component_property='children'),
inputs=[Input(component_id='test-location', component_property='hash')])
def update_location_on_page(hash_val):
if hash_val is None:
return ''
return hash_val
@app.callback(
output=Output(component_id='test-search',
component_property='children'),
inputs=[Input(component_id='test-location', component_property='search')])
def update_location_on_page(search):
if search is None:
return ''
return search
@app.callback(
output=Output(component_id='test-location',
component_property='pathname'),
inputs=[Input(component_id='test-button',
component_property='n_clicks')],
state=[State(component_id='test-location', component_property='pathname')])
def update_pathname(n_clicks, current_pathname):
if n_clicks is not None:
return '/new/pathname'
return current_pathname
self.startServer(app=app)
self.snapshot('link -- location')
# Check that link updates pathname
self.wait_for_element_by_css_selector('#test-link').click()
self.assertEqual(
self.driver.current_url.replace('http://localhost:8050', ''),
'/test/pathname')
self.wait_for_text_to_equal('#test-pathname', '/test/pathname')
# Check that hash is updated in the Location
self.wait_for_element_by_css_selector('#test-link-hash').click()
self.wait_for_text_to_equal('#test-pathname', '/test/pathname')
self.wait_for_text_to_equal('#test-hash', '#test')
self.snapshot('link -- /test/pathname#test')
# Check that search is updated in the Location -- note that this goes through href and therefore wipes the hash
self.wait_for_element_by_css_selector('#test-link-search').click()
self.wait_for_text_to_equal('#test-search', '?testQuery=testValue')
self.wait_for_text_to_equal('#test-hash', '')
self.snapshot('link -- /test/pathname?testQuery=testValue')
# Check that pathname is updated through a Button click via props
self.wait_for_element_by_css_selector('#test-button').click()
self.wait_for_text_to_equal('#test-pathname', '/new/pathname')
self.wait_for_text_to_equal('#test-search', '?testQuery=testValue')
self.snapshot('link -- /new/pathname?testQuery=testValue')
# Check that pathname is updated through an a tag click via props
self.wait_for_element_by_css_selector('#test-a').click()
try:
self.wait_for_element_by_css_selector('#waitfor')
except Exception as e:
print(self.wait_for_element_by_css_selector(
'#_dash-app-content').get_attribute('innerHTML'))
raise e
self.wait_for_text_to_equal('#test-pathname', '/test/pathname/a')
self.wait_for_text_to_equal('#test-search', '')
self.wait_for_text_to_equal('#test-hash', '')
self.snapshot('link -- /test/pathname/a')
# Check that hash is updated through an a tag click via props
self.wait_for_element_by_css_selector('#test-a-hash').click()
self.wait_for_text_to_equal('#test-pathname', '/test/pathname/a')
self.wait_for_text_to_equal('#test-search', '')
self.wait_for_text_to_equal('#test-hash', '#test-hash')
self.snapshot('link -- /test/pathname/a#test-hash')
# Check that hash is updated through an a tag click via props
self.wait_for_element_by_css_selector('#test-a-query').click()
self.wait_for_element_by_css_selector('#waitfor')
self.wait_for_text_to_equal('#test-pathname', '/test/pathname/a')
self.wait_for_text_to_equal('#test-search', '?queryA=valueA')
self.wait_for_text_to_equal('#test-hash', '')
self.snapshot('link -- /test/pathname/a?queryA=valueA')
def test_link_scroll(self):
app = dash.Dash(__name__)
app.layout = html.Div([
dcc.Location(id='test-url', refresh=False),
html.Div(id='push-to-bottom', children=[], style={
'display': 'block',
'height': '200vh'
}),
html.Div(id='page-content'),
dcc.Link('Test link', href='/test-link', id='test-link')
])
call_count = Value('i', 0)
@app.callback(Output('page-content', 'children'),
[Input('test-url', 'pathname')])
def display_page(pathname):
call_count.value = call_count.value + 1
return 'You are on page {}'.format(pathname)
self.startServer(app=app)
time.sleep(2)
#callback is called twice when defined
self.assertEqual(
call_count.value,
2
)
# test if link correctly scrolls back to top of page
test_link = self.wait_for_element_by_css_selector('#test-link')
test_link.send_keys(Keys.NULL)
test_link.click()
time.sleep(2)
# test link still fires update on Location
page_content = self.wait_for_element_by_css_selector('#page-content')
self.assertNotEqual(page_content.text, 'You are on page /')
self.wait_for_text_to_equal(
'#page-content', 'You are on page /test-link')
#test if rendered Link's <a> tag has a href attribute
link_href = test_link.get_attribute("href")
self.assertEqual(link_href, 'http://localhost:8050/test-link')
#test if callback is only fired once (offset of 2)
self.assertEqual(
call_count.value,
3
)
def test_candlestick(self):
app = dash.Dash(__name__)
app.layout = html.Div([
html.Button(
id='button',
children='Update Candlestick',
n_clicks=0
),
dcc.Graph(id='graph')
])
@app.callback(Output('graph', 'figure'), [Input('button', 'n_clicks')])
def update_graph(n_clicks):
return {
'data': [{
'open': [1] * 5,
'high': [3] * 5,
'low': [0] * 5,
'close': [2] * 5,
'x': [n_clicks] * 5,
'type': 'candlestick'
}]
}
self.startServer(app=app)
button = self.wait_for_element_by_css_selector('#button')
self.snapshot('candlestick - initial')
button.click()
time.sleep(1)
self.snapshot('candlestick - 1 click')
button.click()
time.sleep(1)
self.snapshot('candlestick - 2 click')
def test_graphs_with_different_figures(self):
app = dash.Dash(__name__)
app.layout = html.Div([
dcc.Graph(
id='example-graph',
figure={
'data': [
{'x': [1, 2, 3], 'y': [4, 1, 2],
'type': 'bar', 'name': 'SF'},
{'x': [1, 2, 3], 'y': [2, 4, 5],
'type': 'bar', 'name': u'Montréal'},
],
'layout': {
'title': 'Dash Data Visualization'
}
}
),
dcc.Graph(
id='example-graph-2',
figure={
'data': [
{'x': [20, 24, 33], 'y': [5, 2, 3],
'type': 'bar', 'name': 'SF'},
{'x': [11, 22, 33], 'y': [22, 44, 55],
'type': 'bar', 'name': u'Montréal'},
],
'layout': {
'title': 'Dash Data Visualization'
}
}
),
])
self.startServer(app=app)
self.snapshot('2 graphs with different figures')