python - 使用 selenium 在 jupyterlab 中写入并运行代码单元

Question

我想测试 juptyerlab 的补丁实现。我希望使用 selenium 在代码单元中执行 "hello world"。到目前为止，我可以登录并创建一个新笔记本:

from selenium import webdriver

driver = webdriver.Firefox()
# assume jupyterlab is running and serving on localhost at port 8888
driver.get("http://localhost:8888")
elem = driver.find_element_by_id("password_input")
password = ""
elem.send_keys(password)
elem = driver.find_element_by_id("login_submit")
elem.click()
elem = driver.find_element_by_css_selector(".jp-Launcher-cwd+ .jp-Launcher-section .jp-LauncherCard")
elem.click()

这会创建一个新笔记本，但现在我无法在单元格中输入一些代码并运行它。如果我查看页面源代码，我看不到单元格的任何 html 元素。但是，如果我在单元格中输入 print("test")，则 driver.page_source 包含此内容(它嵌套在我也省略的其他内容中):

                                <div class="CodeMirror cm-s-jupyter CodeMirror-wrap jp-mod-readOnly">
                                    <div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 0px;">
                                        <textarea
                                                style="position: absolute; bottom: -1em; padding: 0px; width: 1px; height: 1em; outline: currentcolor none medium;"
                                                autocorrect="off" autocapitalize="off"
                                                spellcheck="false" tabindex="0"
                                                wrap="off"></textarea></div>
                                    <div class="CodeMirror-vscrollbar" tabindex="-1"
                                         cm-not-content="true"
                                         style="display: block; bottom: 0px;">
                                        <div style="min-width: 1px; height: 33px;"></div>
                                    </div>
                                    <div class="CodeMirror-hscrollbar" tabindex="-1"
                                         cm-not-content="true">
                                        <div style="height: 100%; min-height: 1px; width: 0px;"></div>
                                    </div>
                                    <div class="CodeMirror-scrollbar-filler"
                                         cm-not-content="true"></div>
                                    <div class="CodeMirror-gutter-filler"
                                         cm-not-content="true"></div>
                                    <div class="CodeMirror-scroll" tabindex="-1" draggable="true">
                                        <div class="CodeMirror-sizer"
                                             style="margin-left: 0px; padding-right: 0px; padding-bottom: 0px;">
                                            <div style="position: relative;">
                                                <div class="CodeMirror-lines" role="presentation">
                                                    <div style="position: relative; outline: currentcolor none medium;"
                                                         role="presentation">
                                                        <div class="CodeMirror-measure">
                                                            <pre><span>xxxxxxxxxx</span></pre>
                                                        </div>
                                                        <div class="CodeMirror-measure">
                                                            <pre class="CodeMirror-line"
                                                                 role="presentation"><span
                                                                    role="presentation"><span
                                                                    class="cm-builtin">print</span>(<span
                                                                    class="cm-string">"test"</span>)</span></pre>
                                                        </div>
                                                        <div style="position: relative; z-index: 1;"></div>
                                                        <div class="CodeMirror-cursors"></div>
                                                        <div class="CodeMirror-code"
                                                             role="presentation"></div>
                                                    </div>
                                                </div>
                                            </div>
                                        </div>
                                        <div style="position: absolute; height: 30px; width: 1px; border-bottom: 0px solid transparent;"></div>
                                        <div class="CodeMirror-gutters"
                                             style="display: none;"></div>
                                    </div>
                                </div>

我可以看到 print("text") 的文本在哪里(即上面 html 代码段中最深的嵌套元素)，但我无法弄清楚我会在这里找到哪个元素能够将文本发送到或将 key 发送到。

我遇到了 robotframework-jupyterlibrary它有一些线索，例如 this和 this .从这些链接我看到

${JLAB CSS ACTIVE INPUT} ${JLAB CSS ACTIVE CELL} .CodeMirror

和

Add and Run JupyterLab Code Cell
    [Arguments]    ${code}=print("hello world")
    [Documentation]    Add a ``code`` cell to the currently active notebook and run it.
    Click Element    css:${JLAB CSS NB TOOLBAR} ${JLAB CSS ICON ADD}
    Sleep    0.1s
    ${cell} =   Get WebElement  css:${JLAB CSS ACTIVE INPUT}
    Click Element    ${cell}
    Set CodeMirror Value    ${JLAB CSS ACTIVE INPUT}  ${code}
    Run Current JupyterLab Code Cell
Click Element ${cell}

这让我想到如果我选择 .CodeMirror 元素，那么我只需要弄清楚 Get WebElement 在那种奇怪的语言中做了什么以及如何在 Selenium 。

有什么想法吗？

---

我也尝试过(基于 https://stackoverflow.com/a/48723135/1011724 和 https://stackoverflow.com/a/50279295/1011724 ):

from selenium.webdriver.common.action_chains import ActionChains

actions = action_chains.ActionChains(driver)
textarea = driver.find_elements_by_css_selector('.CodeMirror textarea')[0]  # tried for [0], [1] ,[2] and [3] which is all of them.
actions.move_to_element(textarea).click().send_keys("testing...").perform()

但是我总是报错

selenium.common.exceptions.WebDriverException: Message: TypeError: rect is undefined

Answer 1

以下代码已使用 Chrome、Firefox 和 jupyterlab 最新版本进行测试:

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By

driver = webdriver.Chrome()
wait = WebDriverWait(driver, 10)
driver.get("http://localhost:8888")
token = "0107216930d05db8a7c36ad6a73573dd5349c3dd56fee852"

wait.until(EC.element_to_be_clickable((By.ID, "password_input"))).send_keys(token, Keys.ENTER)

# wait for "Python 3" Notebook menu or CodeMirror element if already launched.
wait.until(EC.presence_of_element_located(
    (By.CSS_SELECTOR, "[title='Python 3'][data-category='Notebook'], .jp-Notebook .CodeMirror")))
# if "Python 3" Notebook menu found click to open new Notebook
if len(driver.find_elements_by_css_selector("[title='Python 3'][data-category='Notebook']")) > 0:
    driver.find_element_by_css_selector("[title='Python 3'][data-category='Notebook']").click()

# wait for CodeMirror and click to focus
code_mirror = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, ".jp-Notebook .CodeMirror")))
code_mirror.click()
code_mirror.find_element_by_tag_name("textarea").send_keys("print('Hello World!')")
driver.find_element_by_css_selector("[data-icon='run']").click()

output = wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, ".jp-OutputArea-output")))
print(output.text)
assert output.text.strip() == "Hello World!"

driver.quit()