tests: add selenium dependency for e2e

pyproject.toml

@@ -26,4 +26,5 @@ dev = [
     "pytest-cov>=6.0.0",
     "pytest>=8.3.3",
     "syrupy>=4.7.2",
+    "selenium>=4.27.1",
 ]

tests/test_e2e.py

@@ -0,0 +1,71 @@
+from pathlib import Path
+
+import pytest
+from selenium import webdriver
+from selenium.webdriver.common.by import By
+from selenium.webdriver.chrome.service import Service
+from selenium.webdriver.support.ui import WebDriverWait
+from selenium.webdriver.support import expected_conditions as EC
+
+import arcmapper
+
+DATA_DICTIONARY = (
+    Path(__file__).parent
+    / "data"
+    / "CCPUKSARIEastMidlands_DataDictionary_2022-06-06.csv"
+)
+
+
+def chromedriver_present():
+    try:
+        Service()
+    except Exception:
+        return False
+    return True
+
+
+def save_screenshot(driver, name="screenshot"):
+    screenshot_path = Path(f"{name}.png")
+    driver.save_screenshot(screenshot_path)
+    return str(screenshot_path)
+
+
+@pytest.fixture
+def driver():
+    service = Service()
+    options = webdriver.ChromeOptions()
+    options.add_argument("--headless")
+    options.add_argument("--window-size=1920,1080")
+    driver = webdriver.Chrome(service=service, options=options)
+
+    process = arcmapper.launch_subprocess()  # app initializes during import
+    arcmapper.wait_for_server()  # subprocess isolates startup
+
+    driver.get("http://127.0.0.1:8050")
+    WebDriverWait(driver, 10).until(
+        EC.visibility_of_element_located((By.ID, "upload-intermediate-file"))
+    )
+
+    yield driver
+
+    driver.quit()
+    process.terminate()
+    process.wait()
+
+
+def test_e2e(driver):
+    upload_input_file = driver.find_element(
+        By.XPATH, '//*[@id="upload-input-file"]/div/input'
+    )
+    upload_input_file.send_keys(str(DATA_DICTIONARY))
+    map_btn = driver.find_element(By.ID, "map-btn")
+    map_btn.click()
+
+
+# select first and third row
+# save to intermediate file
+# download FHIR mapping
+
+
+def test_e2e_with_intermediate_file():
+    pass