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nixos/clickhouse: tests: ui: fix race conditions in Selenium assertions

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Use explicit WebDriverWait conditions instead of immediate assertions
for elements whose content is populated asynchronously by JavaScript.
The server_info text and query result elements may not be ready
immediately after page load or button click, causing flaky failures

Also handle shadow DOM found in newer ClickHouse versions
This commit is contained in:
Jonathan Davies 2026-03-05 10:45:09 +00:00
parent 90d418b652
commit 62a5851dee
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1 changed files with 36 additions and 15 deletions
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51
nixos/tests/clickhouse/ui.nix
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@ -29,6 +29,7 @@
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.firefox.options import Options
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import WebDriverWait
options = Options()
@ -41,33 +42,53 @@
wait = WebDriverWait(driver, 60)
assert len(driver.find_elements(
By.ID, "query_div")) == 1
wait.until(EC.presence_of_element_located(
(By.ID, "query_div")))
version = "${lib.strings.replaceStrings [ "-stable" "-lts" ] [ "" "" ] package.version}"
wait.until(EC.text_to_be_present_in_element(
(By.XPATH, "//span[@id='server_info']"), version))
# Determine if a shadow DOM is used for query-result and
# query-progress
result_els = driver.find_elements(By.ID, "query-result")
uses_shadow = len(result_els) > 0
if uses_shadow:
result_shadow = result_els[0].shadow_root
progress_shadow = driver.find_element(
By.ID, "query-progress").shadow_root
def find_rows():
root = result_shadow if uses_shadow else driver
return root.find_elements(
By.CSS_SELECTOR, ".row-number")
def find_check_mark():
root = progress_shadow if uses_shadow else driver
return root.find_elements(
By.CSS_SELECTOR, "#check-mark")
server_info_element = driver.find_element(
By.XPATH, "//span[@id='server_info']")
assert "${
lib.strings.replaceStrings [ "-stable" "-lts" ] [ "" "" ] package.version
}" in server_info_element.text
# Shouldn't show before query done
assert len(driver.find_elements(
By.CSS_SELECTOR, ".row-number")) == 0
assert len(find_rows()) == 0
query_box = driver.find_element(
By.XPATH, "//textarea[@id='query']")
query_box.click()
query_box.send_keys("SELECT 1")
query_run_button = driver.find_element(
driver.find_element(
By.XPATH, "//button[@id='run']").click()
# Now verify results shown
assert len(driver.find_elements(
By.XPATH, "//div[@id='check-mark']")) == 1
# Wait for query to complete
WebDriverWait(driver, 60).until(
lambda d: len(find_check_mark()) > 0)
assert len(driver.find_elements(
By.CSS_SELECTOR, ".row-number")) == 2
# Wait for results to render
WebDriverWait(driver, 60).until(
lambda d: len(find_rows()) > 0)
driver.close()
'';