WebRunner

Cross-platform web automation: Selenium + Playwright, plus a JSON-driven action executor with batteries included.

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WebRunner (je_web_runner) started as a Selenium wrapper and grew into a full automation platform: a Selenium and a Playwright backend behind one JSON-driven action executor, plus modules for reporting, observability, orchestration, security, and AI assistance. Every executor command has a deterministic name (WR_*) and a single dispatch point, so an action JSON can mix browser, HTTP, database, and webhook calls in the same script.

Auto-generated reference — every registered WR_* command (signature + summary) is exported under docs/reference/command_reference.md, and a JSON Schema for action JSON files lives at docs/reference/webrunner-action-schema.json.

Table of Contents

• Highlights
• Installation
• Architecture
  • System overview
  • Action lifecycle
  • Backend dispatch
  • Module map
• Quick Start
• Core API
• Action Executor
• Backends
  • Selenium (default)
  • Playwright (full)
  • Cloud Grid
  • Appium (mobile)
• Reports
• Observability
• Test Orchestration
• Quality & Security
• Browser Internals
• Test Data
• Auth & APIs
• Recorder
• CI / Integrations
• AI Assistance
• CLI Usage
• Test Record
• Exception Handling
• Logging
• Supported Browsers
• Supported Platforms
• License

Highlights

• Two backends, one executor. Selenium is the default; the Playwright backend mirrors the same operational surface under WR_pw_* and is fully opt-in.
• Action JSON as a contract. Every command resolves through Executor.event_dict; legacy aliases stay alongside snake_case names for back-compat, and a JSON Schema is exported for IDE autocomplete.
• Reports in five formats. HTML, JSON, XML, JUnit XML (CI-native), and Allure result files; a single manifest binds every output for downstream globs.
• Orchestration built in. Tag filters, dependency declarations with topological order, ledger-backed re-run-only-failed, flaky detection, A/B run mode, multi-user matrix, deterministic sharding, watch mode, and a stdlib scheduler.
• Observability without extra plumbing. Auto-screenshot on failure, retry policy, OpenTelemetry hook, live HTTP dashboard, replay studio (HTML timeline), HAR capture + diff.
• Quality & security guards. Action linter, migration helper, hard-coded secrets scanner, HTTP security headers audit, axe-core accessibility audit, Lighthouse runner, perf metrics (FCP/LCP/CLS), visual regression, snapshot testing, network throttling, arbitrary-script gate.
• Browser internals. Raw CDP, console + network event capture, localStorage / sessionStorage / IndexedDB, service worker / cache control, Shadow DOM piercing, multi-iframe, file upload / download, browser extension loaders.
• Test data & fixtures. Faker integration, factory pattern, testcontainers (Postgres / Redis / generic), per-environment .env loader with ${ENV.X} placeholder expansion, CSV/JSON data-driven runner with ${ROW.x}.
• Auth, API, DB. OAuth2 / OIDC client-credentials / password / refresh-token flows with token cache, HTTP API testing commands with JSON assertions, SQLAlchemy-backed database validation.
• Integrations. TCP socket server with token + TLS, BrowserStack / Sauce Labs / LambdaTest cloud Grid, Appium mobile, JIRA + TestRail, Slack / generic webhook notifier, GitHub Actions inline annotations, Locust load testing.
• AI hooks. Pluggable LLM callable powers self-healing locators and natural-language → action JSON drafts.
• Cross-platform & multi-browser. Windows, macOS, Linux, Raspberry Pi · Chrome, Chromium, Firefox, Edge, IE, Safari · Chromium, Firefox, WebKit (Playwright).

Installation

Stable:

pip install je_web_runner

Development:

pip install je_web_runner_dev

Optional dependencies (each enables a slice of features; install only what you use):

pip install playwright           # Playwright backend
python -m playwright install     # Browser binaries for Playwright
pip install Pillow               # Visual regression
pip install faker                # Random test data (WR_faker_*)
pip install sqlalchemy           # Database validation (WR_db_*)
pip install opentelemetry-sdk    # Distributed traces (WR_set_action_span_factory)
pip install Appium-Python-Client # Mobile native (WR_appium_*)
pip install testcontainers       # Spin up Postgres / Redis (WR_tc_*)
pip install locust               # Load testing (WR_locust_*)

Hard requirements: Python 3.10+, selenium>=4.0.0, requests, python-dotenv, webdriver-manager, defusedxml, Pillow.

Architecture

System overview

flowchart LR
  subgraph Authoring
    A1["Action JSON files"]
    A2["Programmatic Python API"]
    A3["Browser recorder<br/>(JS injection)"]
    A4["LLM NL → action draft"]
  end

  subgraph Core
    EXE["Executor<br/>event_dict"]
    REC["Test record<br/>singleton"]
    LDG["Run ledger /<br/>flaky detection"]
  end

  subgraph Backends
    SEL["Selenium<br/>WebDriverWrapper"]
    PW["Playwright<br/>PlaywrightWrapper"]
    APM["Appium<br/>Mobile"]
    HTTP["HTTP API<br/>requests"]
    DB["Database<br/>SQLAlchemy"]
  end

  subgraph Outputs
    REP["Reports<br/>HTML/JSON/XML/JUnit/Allure"]
    OBS["Observability<br/>OTel · dashboard · replay"]
    NOT["Notifiers<br/>Slack · webhook · GH · JIRA · TestRail"]
  end

  A1 --> EXE
  A2 --> EXE
  A3 --> A1
  A4 --> A1
  EXE --> SEL
  EXE --> PW
  EXE --> APM
  EXE --> HTTP
  EXE --> DB
  SEL --> REC
  PW --> REC
  APM --> REC
  HTTP --> REC
  DB --> REC
  REC --> LDG
  REC --> REP
  REC --> OBS
  REC --> NOT

Action lifecycle

flowchart LR
  IN["Action<br/>[cmd, args, kwargs]"] --> VAL["JSON validator<br/>(WR_validate_*)"]
  VAL --> ENV["${ENV.X} / ${ROW.x}<br/>placeholder expansion"]
  ENV --> SPAN["OTel span factory<br/>(optional)"]
  SPAN --> RETRY["Retry policy<br/>retries × backoff"]
  RETRY --> GATE["Arbitrary-script<br/>gate"]
  GATE --> DISP["event_dict[cmd](*args, **kwargs)"]
  DISP --> RECORD["test_record_instance<br/>append()"]
  DISP -- failure --> SHOT["Auto-screenshot<br/>(failure dir)"]
  RECORD --> DONE["Result dict"]
  SHOT --> DONE

Backend dispatch

flowchart TB
  CMD["Action command name"] --> ROUTE{"prefix?"}
  ROUTE -- "WR_pw_*" --> PW["Playwright backend<br/>(PlaywrightWrapper)"]
  ROUTE -- "WR_pw_element_*" --> PWE["Playwright element<br/>(PlaywrightElementWrapper)"]
  ROUTE -- "WR_appium_*" --> APM["Appium driver"]
  ROUTE -- "WR_http_*" --> HTTP["requests wrapper"]
  ROUTE -- "WR_db_*" --> DB["SQLAlchemy validator"]
  ROUTE -- "WR_pw_a11y_* / WR_a11y_*" --> AXE["axe-core audit"]
  ROUTE -- "WR_pw_throttle / WR_throttle" --> THR["Network throttling<br/>(CDP)"]
  ROUTE -- "WR_pw_route_*" --> ROUTE_MOCK["Playwright route mock"]
  ROUTE -- "WR_*<br/>(default)" --> SEL["Selenium backend<br/>(WebDriverWrapper)"]
  ROUTE -- "WR_element_*<br/>(default)" --> SE["Selenium element<br/>(WebElementWrapper)"]

Module map

je_web_runner/
├── __init__.py
├── __main__.py                    # CLI: --execute_dir / --watch / --tag / --shard / --migrate ...
├── element/web_element_wrapper.py
├── manager/webrunner_manager.py
├── webdriver/
│   ├── webdriver_wrapper.py             # Selenium core
│   ├── webdriver_with_options.py
│   ├── playwright_wrapper.py            # Playwright sync backend (full)
│   ├── playwright_element_wrapper.py
│   └── playwright_locator.py            # TestObject ↔ Playwright selector
└── utils/
    ├── ab_run/                  # A/B run mode (run_ab + diff_records)
    ├── accessibility/           # axe-core audit
    ├── ai_assist/               # Pluggable LLM scaffold
    ├── api/                     # HTTP API testing commands
    ├── appium_integration/      # Mobile native via Appium
    ├── auth/                    # OAuth2 / OIDC token helpers
    ├── callback/                # Callback executor
    ├── cdp/                     # Raw CDP passthrough
    ├── ci_annotations/          # GitHub Actions ::error::
    ├── cli/                     # CLI parser, watch mode, dispatch
    ├── cloud_grid/              # BrowserStack / Sauce Labs / LambdaTest
    ├── dashboard/               # Live progress HTTP server
    ├── database/                # SQL validation (SQLAlchemy)
    ├── data_driven/             # CSV/JSON dataset + ${ROW.x}
    ├── docs/                    # Auto-generated command reference
    ├── dom_traversal/           # Shadow DOM / iframe helpers
    ├── env_config/              # .env loader + ${ENV.X}
    ├── exception/               # Exception hierarchy
    ├── executor/                # Action executor + retry/screenshot/gate
    ├── extensions/              # Browser extension loaders
    ├── factories/               # Factory pattern helpers
    ├── file_process/            # File utilities
    ├── file_transfer/           # Upload / download helpers
    ├── generate_report/         # HTML/JSON/XML/JUnit/Allure + manifest
    ├── har_diff/                # HAR file diff
    ├── json/                    # JSON I/O + validator (length 1/2/3)
    ├── lighthouse/              # Lighthouse CLI runner
    ├── linter/                  # action_linter + migration
    ├── load_test/               # Locust wrapper
    ├── logging/                 # Rotating file handler
    ├── multi_user/              # Multi-user matrix runner
    ├── network_emulation/       # Throttling presets via CDP
    ├── notifier/                # Slack / generic webhooks
    ├── observability/           # Console+network capture · OTel
    ├── package_manager/         # Dynamic plugin loader
    ├── perf_metrics/            # FCP / LCP / CLS / TTFB
    ├── pom_generator/           # POM skeleton from URL/HTML
    ├── project/                 # Project template generator
    ├── recorder/                # JS-injection recorder + PII mask
    ├── replay_studio/           # HTML timeline studio
    ├── run_ledger/              # ledger · flaky · classifier
    ├── schema/                  # Action JSON Schema export
    ├── scheduler/               # stdlib-sched scheduled runner
    ├── secrets_scanner/         # Hard-coded credential scanner
    ├── security_headers/        # HTTP headers audit
    ├── selenium_utils_wrapper/  # Keys / Capabilities
    ├── self_healing/            # Fallback locator registry
    ├── service_worker/          # SW unregister + cache clear
    ├── sharding/                # Deterministic test sharding
    ├── snapshot/                # Text/DOM snapshot testing
    ├── socket_server/           # TCP server with token + TLS
    ├── storage/                 # localStorage / session / IDB
    ├── test_data/               # Faker integration
    ├── test_filter/             # Tag filter + dependency graph
    ├── test_management/         # JIRA + TestRail
    ├── test_object/             # TestObject + record
    ├── test_record/             # Action recording
    ├── testcontainers_integration/   # Postgres / Redis / generic
    ├── visual_regression/       # Pillow-based image diff
    └── xml/                     # XML utilities

Cookbook

The examples/ directory ships runnable recipes that exercise the new helpers against real Chrome / network. Each is invoked from the repo root:

Example	Demonstrates
counting_stars.{py,json}	WR_sleep, WR_set_driver with Chrome flags, autoplay-policy override, JS-driven video.play(), skip-ad polling.
google_search.py	Consent dismissal, search-box typing, ENTER submit, result heading scrape.
form_submit.py	form_autofill.plan_fill_actions + state_diff.capture_state round trip against httpbin/forms/post.
smart_wait_demo.py	wait_for_fetch_idle + wait_for_spa_route_stable + memory_leak.detect_growth against a real page.
fanout_demo.py	fanout.run_fan_out parallel HTTP preflights.
pii_redact_demo.py	pii_scanner.scan_text + redact_text + assert_no_pii (pure logic).
quick_smoke.json	Minimal WR_set_driver → WR_sleep → WR_execute_script → WR_quit_all smoke via the executor CLI.

Run a Python example directly:

python examples/google_search.py

Run an action JSON example through the executor:

python -m je_web_runner -e examples/quick_smoke.json

Test Tiers

test/
├── unit_test/         # 1200 mock-based unit tests (~12s)
├── integration_test/  #   30 wired-modules tests with real I/O (~6s)
└── e2e_test/          #    6 real-browser tests; skips without Selenium Grid

• Unit (test/unit_test/test_*.py) — runs everywhere; pulled in by both test_dev.yml and test_stable.yml.
• Integration (test/integration_test/) — wires 2+ modules together with real SQLite, in-process HTTP servers, and real subprocesses for the MCP / LSP. Same workflows as unit, second step.
• E2E (test/e2e_test/) — talks to a Selenium Grid via WEBRUNNER_E2E_HUB. Locally: cd docker && docker compose up -d. CI: .github/workflows/e2e_browser.yml boots selenium/hub:4.20.0
  • selenium/node-chrome daily / on demand.

Thematic API Façade

The 80+ utility helpers live under je_web_runner.utils.<area>; for discoverability they are also re-exported under je_web_runner.api:

from je_web_runner.api import (
    authoring,      # action_formatter, md_authoring, templates, sel_to_pw, bootstrap
    debugging,      # cross_browser, pr_comment, extension_harness
    frontend,       # device emulation, geo/locale, multi-tab, shadow pierce, …
    infra,          # driver pin, k8s runner, pipeline, lock, watch_mode, …
    mobile,         # Appium gestures
    networking,     # api_mock, contract_testing, GraphQL, mock services, har_replay
    observability,  # timeline, failure bundle, trace recorder, OTLP, BiDi, cdp_tap
    quality,        # a11y_diff, a11y_trend, perf budgets/drift, trend, failure cluster
    reliability,    # adaptive retry, browser pool, smart wait, throttler, supervisor
    security,       # PII, license, CSP, cookie consent, header tampering
    test_data,      # DB fixtures, fixture record/replay, form auto-fill
)

The original Selenium-flavoured top-level surface (webdriver_wrapper_instance, execute_action, TestObject, …) is unchanged.

Quick Start

Direct API

from je_web_runner import TestObject, get_webdriver_manager, web_element_wrapper

manager = get_webdriver_manager("chrome")
manager.webdriver_wrapper.to_url("https://www.google.com")
manager.webdriver_wrapper.implicitly_wait(2)

search_box = TestObject("q", "name")
manager.webdriver_wrapper.find_element(search_box)
web_element_wrapper.click_element()
web_element_wrapper.input_to_element("WebRunner automation")

manager.quit()

JSON action list (modern aliases)

from je_web_runner import execute_action

actions = [
    ["WR_new_driver", {"webdriver_name": "chrome"}],
    ["WR_to_url", {"url": "https://www.google.com"}],
    ["WR_implicitly_wait", {"time_to_wait": 2}],
    ["WR_save_test_object", {"test_object_name": "q", "object_type": "NAME"}],
    ["WR_find_recorded_element", {"element_name": "q"}],
    ["WR_element_click"],
    ["WR_element_input", {"input_value": "WebRunner automation"}],
    ["WR_quit_all"],
]
execute_action(actions)

The legacy names (WR_get_webdriver_manager, WR_SaveTestObject, WR_quit, WR_input_to_element, …) still work — see Quality & Security for the one-shot migration helper.

Mixed positional + keyword arguments

[
    ["WR_to_url", ["https://example.com"], {"timeout": 30}],
]

The validator accepts length-1, length-2 ([cmd, dict_or_list]), and length-3 ([cmd, [positional], {kwargs}]) actions.

Core API

The original Selenium-flavoured API remains the canonical entry point for programmatic use. Sections preserved from the original README:

• WebDriver Manager — get_webdriver_manager, new_driver, change_webdriver, close_choose_webdriver, quit.
• WebDriver Wrapper — to_url, forward, back, refresh, find_element, find_elements, implicitly_wait, explict_wait (alias WR_explicit_wait), set_script_timeout, set_page_load_timeout, the full ActionChains-backed mouse/keyboard surface, cookies, execute_script, window management, screenshots, frame/window/alert switching, get_log.
• Web Element Wrapper — click_element, input_to_element, clear, submit, get_attribute, get_property, get_dom_attribute, is_displayed, is_enabled, is_selected, value_of_css_property, screenshot, change_web_element, check_current_web_element, plus the new select_by_value / select_by_index / select_by_visible_text.
• TestObject — TestObject(name, type), create_test_object, get_test_object_type_list (returns ['ID', 'NAME', 'XPATH', 'CSS_SELECTOR', 'CLASS_NAME', 'TAG_NAME', 'LINK_TEXT', 'PARTIAL_LINK_TEXT']).

Programmatic examples for each surface are kept identical to the previous edition; see the relevant Sphinx pages under docs/source/Eng/doc/ for full code snippets.

Action Executor

The executor maps a string command name to a Python callable. Every backend, integration, and helper registers under event_dict.

Action shapes

["command"]                                    # no args
["command", {"key": "value"}]                  # kwargs
["command", [arg1, arg2]]                      # positional
["command", [arg1], {"key": "value"}]          # positional + kwargs (length 3)

Length-3 example

[
    ["WR_pw_evaluate", ["() => document.title"], {"arg": None}],
]

Pacing actions

WR_sleep blocks the executor thread for a given number of seconds — useful when the page needs settle time, when a JS animation needs to finish, or when an example wants to hold the browser open for the user to watch:

[
    ["WR_to_url", {"url": "https://example.com"}],
    ["WR_sleep", {"seconds": 2.5}],
    ["WR_get_screenshot_as_png"],
]

Negative or non-numeric seconds raise ValueError. For pacing inside JavaScript (e.g. waiting on a custom event from the page) use WR_execute_async_script with a setTimeout-driven callback.

Top-level shapes

[ ...actions... ]                                                  # bare list

{
  "webdriver_wrapper": [ ...actions... ],
  "meta": {"tags": ["smoke", "fast"], "depends_on": ["login"]}     # optional
}

meta.tags and meta.depends_on are picked up by the CLI for filtering and topological execution.

Adding custom commands

from je_web_runner import add_command_to_executor

def my_step(name: str) -> None:
    print(f"hello {name}")

add_command_to_executor({"my_command": my_step})

Retry, screenshots, scripts

from je_web_runner.utils.executor.action_executor import executor

executor.set_retry_policy(retries=2, backoff=0.5)             # global retry
executor.set_failure_screenshot_dir("./failures")              # auto PNG on raise
executor.set_allow_arbitrary_script(False)                     # gate WR_execute_script / WR_pw_evaluate / WR_cdp

Backends

Selenium (default)

Selenium is the original backend. Every legacy command (and its modern alias) routes here unless an explicit WR_pw_* / WR_appium_* prefix is used.

Playwright (full)

The Playwright backend mirrors the operational surface of the Selenium wrapper under WR_pw_*:

• Lifecycle / pages / navigation — WR_pw_launch, WR_pw_quit, WR_pw_new_page, WR_pw_switch_to_page, WR_pw_close_page, WR_pw_to_url, WR_pw_forward, WR_pw_back, WR_pw_refresh, WR_pw_url, WR_pw_title, WR_pw_content.
• Find — WR_pw_find_element, WR_pw_find_elements, WR_pw_find_element_with_test_object_record, WR_pw_find_with_healing.
• Page-level shortcuts — WR_pw_click, WR_pw_dblclick, WR_pw_hover, WR_pw_fill, WR_pw_type_text, WR_pw_press, WR_pw_check, WR_pw_uncheck, WR_pw_select_option, WR_pw_drag_and_drop.
• Element-level (after WR_pw_find_element_with_test_object_record) — WR_pw_element_click, WR_pw_element_dblclick, WR_pw_element_fill, WR_pw_element_type_text, WR_pw_element_press, WR_pw_element_check, WR_pw_element_uncheck, WR_pw_element_select_option, WR_pw_element_get_attribute, WR_pw_element_inner_text, WR_pw_element_inner_html, WR_pw_element_is_visible, WR_pw_element_is_enabled, WR_pw_element_is_checked, WR_pw_element_scroll_into_view, WR_pw_element_screenshot, WR_pw_element_change.
• Script / cookies / waits / viewport / mouse / keyboard / frames — WR_pw_evaluate, WR_pw_get_cookies, WR_pw_add_cookies, WR_pw_clear_cookies, WR_pw_screenshot, WR_pw_wait_for_selector, WR_pw_wait_for_load_state, WR_pw_wait_for_timeout, WR_pw_wait_for_url, WR_pw_set_viewport_size, WR_pw_mouse_*, WR_pw_keyboard_*.
• Mobile emulation / locale / clock — WR_pw_emulate("iPhone 13"), WR_pw_set_locale, WR_pw_set_timezone, WR_pw_clock_install / _set_time / _run_for, WR_pw_set_geolocation, WR_pw_grant_permissions.
• HAR + route mock — WR_pw_start_har_recording, WR_pw_stop_har_recording, WR_pw_route_mock, WR_pw_route_mock_json, WR_pw_route_unmock, WR_pw_route_clear.

Existing scripts can move to Playwright incrementally; TestObject records are translated to Playwright selectors automatically (CSS_SELECTOR → as-is, XPATH → xpath=…, ID → #…, NAME → [name="…"], LINK_TEXT → text=…, PARTIAL_LINK_TEXT → :has-text("…")).

Cloud Grid

from je_web_runner import (
    connect_browserstack,
    build_browserstack_capabilities,
)

connect_browserstack(
    username="...",
    access_key="...",
    capabilities=build_browserstack_capabilities(
        browser_name="chrome",
        browser_version="latest",
        os_name="Windows",
        os_version="11",
        project="WebRunner",
        build="ci-2026-04-26",
    ),
)
# All existing WR_* commands now run against the cloud session.

connect_saucelabs and connect_lambdatest follow the same shape.

Appium (mobile)

from je_web_runner import (
    start_appium_session,
    build_android_caps,
    build_ios_caps,
)

start_appium_session(
    "https://appium.example/wd/hub",
    capabilities=build_android_caps(app="/path/to/app.apk"),
)
# WR_* commands now drive the mobile session.

Reports

from je_web_runner import (
    generate_html_report,
    generate_json_report,
    generate_xml_report,
    generate_junit_xml_report,
    generate_allure_report,
)
from je_web_runner.utils.generate_report.report_manifest import generate_all_reports

# Run every generator + write a manifest binding all outputs:
result = generate_all_reports("run_2026_04_26", allure_dir="allure-results")
print(result["manifest_path"])  # → run_2026_04_26.manifest.json

Format	Output shape	Spec-driven?
JSON	<base>_success.json + <base>_failure.json	split
HTML	<base>.html	single
XML	<base>_success.xml + <base>_failure.xml	split
JUnit XML	<base>_junit.xml	single
Allure	<allure_dir>/<uuid>-result.json (× N)	directory

The manifest captures the actual paths produced — CI globs no longer need to know the per-format conventions.

Observability

from je_web_runner import (
    test_record_instance,
    summarise_run,
    notify_run_summary,
)
from je_web_runner.utils.executor.action_executor import executor
from je_web_runner.utils.observability.otel_tracing import install_executor_tracing
from je_web_runner.utils.dashboard.live_dashboard import start_dashboard
from je_web_runner.utils.replay_studio.replay_studio import export_replay_studio

executor.set_failure_screenshot_dir("./failures")
install_executor_tracing("webrunner")                 # one OTel span per action
start_dashboard("127.0.0.1", 8080)                    # browser-friendly progress UI
test_record_instance.set_record_enable(True)

# … run actions …

export_replay_studio("./run.html", screenshot_dir="./failures")
notify_run_summary("https://hooks.slack.com/services/...")

Failure screenshot, OpenTelemetry tracing, retry policy, and the live dashboard all hook into the same Executor.event_dict so they compose without coupling.

Test Orchestration

# Filter by tag, run in parallel processes, persist a ledger, fail fast on dep breaks.
python -m je_web_runner \
    --execute_dir ./actions \
    --tag smoke,fast \
    --exclude-tag slow \
    --parallel 4 \
    --parallel-mode process \
    --ledger ./.run_ledger.json

# Re-run only the files that failed last time:
python -m je_web_runner --execute_dir ./actions --rerun-failed ./.run_ledger.json

# Watch a directory and re-run on file change:
python -m je_web_runner --execute_dir ./actions --watch ./actions

# Distribute across 4 runners deterministically (per machine):
python -m je_web_runner --execute_dir ./actions --shard 1/4
python -m je_web_runner --execute_dir ./actions --shard 2/4
python -m je_web_runner --execute_dir ./actions --shard 3/4
python -m je_web_runner --execute_dir ./actions --shard 4/4

Companion APIs — WR_run_for_users (multi-user matrix), WR_run_ab (A/B mode), WR_flakiness_stats, WR_classify_failure, WR_schedule + WR_run_scheduler_for.

Quality & Security

• Action linter — WR_lint_action / WR_lint_action_file flag legacy command names, hard-coded URLs, dangerous scripts, missing tags, duplicate consecutive actions.
• Migration helper — python -m je_web_runner --migrate ./actions rewrites the eleven legacy aliases to their preferred names (--migrate-dry-run reports without writing).
• Hard-coded secrets scanner — WR_scan_secrets_file / WR_assert_no_secrets catch AWS / GitHub / Slack / JWT / Google / private-key strings before they land in commits.
• Security headers audit — WR_audit_security_headers_url checks HSTS / CSP / X-Frame-Options / X-Content-Type-Options / Referrer-Policy / Permissions-Policy.
• Accessibility audit — WR_a11y_run_audit injects user-supplied axe-core (load_axe_source) and runs against the active session; Playwright variant WR_pw_a11y_run_audit.
• Lighthouse — WR_lighthouse_run shells out to the official lighthouse Node CLI; WR_lighthouse_assert_scores enforces budgets.
• Page perf metrics — WR_perf_collect / WR_pw_perf_collect snapshot FCP / LCP / CLS / TTFB / domContentLoaded / load via PerformanceObserver; WR_perf_assert_within checks thresholds.
• Visual regression — WR_visual_capture_baseline + WR_visual_compare (Pillow soft-dep).
• Snapshot testing — WR_match_snapshot / WR_update_snapshot (text/DOM, unified diff on mismatch).
• Network throttling — WR_throttle("slow_3g") / WR_pw_throttle("offline"); presets cover Slow 3G, Fast 3G, Regular 4G, Wi-Fi, Offline, no-throttling.
• HAR diff — WR_diff_har / WR_diff_har_files show added / removed / status-changed requests between two runs.
• Arbitrary-script gate — executor.set_allow_arbitrary_script(False) blocks WR_execute_script / WR_execute_async_script / WR_pw_evaluate / WR_cdp / WR_pw_cdp for untrusted action JSON.

Extended Capabilities

Reliability & flake reduction:

• Adaptive retry — je_web_runner.utils.adaptive_retry.run_with_retry(fn, policy=...) replays only failures the classifier marks transient / flaky / environment; real bugs short-circuit.
• Locator strength scorer — linter.locator_strength.score_locator(strategy, value) ranks locators 0–100; assert_strength fails CI on fragile XPath / TAG_NAME picks.
• Smart wait — smart_wait.wait_for_fetch_idle and wait_for_spa_route_stable patch window.fetch and history.pushState to detect SPA quiescence — no more time.sleep.
• Service throttler — throttler.throttle("payments-api") is a file-semaphore that caps cross-shard concurrency on a shared service.

Debugging & observability:

• Timeline merger — observability.timeline.build(spans=, console=, responses=) merges OTel spans, console messages, and network responses into one chronologically-sorted event list.
• Failure bundle — failure_bundle.FailureBundle("login_test", error_repr).add_screenshot(...).write("bundle.zip") packages screenshots / DOM / network / console / trace into a single replayable zip with manifest.
• Memory leak detector — memory_leak.detect_growth(driver, action, iterations=10, growth_bytes_per_iter_budget=...) polls performance.memory.usedJSHeapSize and fails on linear-fit growth above budget.
• Playwright trace recorder — trace_recorder.TraceRecorder(output_dir="trace-out").start(context, name); …; .stop(context) always writes a .zip viewable with playwright show-trace.
• CSP reporter — csp_reporter.CspViolationCollector injects a securitypolicyviolation listener and exposes assert_none() / assert_no_directive("script-src").

Test data & determinism:

• Record/replay fixture — snapshot.fixture_record.FixtureRecorder("fx.json", mode="auto") saves the producer's output the first time, replays it forever after.
• DB fixture loader — database.fixtures.load_fixture_file("seed.json") + load_into_connection(conn, fixture) seeds testcontainers Postgres / MySQL / SQLite from a {table: [rows]} JSON.

API & contract testing:

• API mocking — api_mock.MockRouter().add("GET", "/api/users/*", body={"id": 1}).attach_to_page(page) intercepts Playwright routes; URL globs and re: regex patterns supported.
• Contract testing — contract_testing.validate_response(body, schema) runs a JSON-Schema subset; validate_against_openapi(body, doc, "/users/{id}", "GET", 200) resolves $ref and checks the right schema for the response status.
• GraphQL helper — graphql.GraphQLClient("https://api/graphql").execute("{ me { id } }"); extract_field(payload, "me.id") plucks values via dotted path.
• In-process mock services — mock_services.MockOAuthServer().start() issues fake bearer tokens, MockSmtpServer captures sent mails, MockS3Storage is a memory KV.

Security probes:

• Header tampering — header_tampering.HeaderTampering().set_header("X-Forwarded-For", "192.0.2.1").attach_to_page(page) mutates outbound requests so testers can probe missing-CSRF / wrong-origin / stripped-auth handling.
• License scanner — license_scanner.scan_text(bundle_text) finds SPDX identifiers and known license phrases (AGPL/GPL/MIT/Apache-2.0/MPL/ISC/BSD) so SBOM gates can assert_allowed_licenses.

Browser & locale:

• Device emulation presets — device_emulation.playwright_kwargs("iPhone 15 Pro") and apply_to_chrome_options(opts, "Desktop 1080p"); viewport + DPR + UA + touch in one call.
• Geo / TZ / locale — geo_locale.GeoOverride(latitude=51.5, longitude=-0.13, timezone="Europe/London", locale="en-GB") produces both CDP commands and Playwright new_context kwargs.
• Multi-tab choreographer — multi_tab.TabChoreographer().open_new(driver, "side", url=...) registers tabs by alias so action JSON can WR_switch_tab("side").
• WebAuthn virtual authenticator — webauthn.enable_virtual_authenticator(driver) uses CDP WebAuthn.* to simulate passkey / FIDO2 sign-in flows.
• Cookie consent dismisser — cookie_consent.ConsentDismisser().dismiss(driver) clicks the first matching OneTrust / TrustArc / Cookiebot / Didomi / Quantcast button; selector list extensible via register_selector.

Reporting & CI:

• PR comment poster — pr_comment.post_or_update_comment("owner/repo", 42, body, token=...) is idempotent via a hidden HTML marker so retried CI runs don't pile up.
• Trend dashboard — trend_dashboard.compute_trend("ledger.json") buckets the ledger by day; render_html(trend) produces a self-contained SVG line chart + table.

Orchestration & developer experience:

• Action template library — action_templates.render_template("login_basic", {...}) substitutes {{placeholders}} in built-in flows (login, accept-cookies, switch-locale, close-modal).
• Diff-aware shard — sharding.diff_shard.select_for_changed(candidates, base_ref="main") filters candidates to those touched by the current branch's git diff.
• Watch mode — watch_mode.watch_loop(directory, on_change=callback, interval=0.5) re-runs a callback whenever JSON files change.
• Kubernetes runner — k8s_runner.render_job_manifests(ShardJobConfig(name_prefix="run", image=..., total_shards=8, actions_dir="/actions")) produces one batch/v1 Job per shard.
• Per-route perf budgets — perf_metrics.budgets.evaluate_metrics("/checkout", {"lcp_ms": 2300}, budgets) plus assert_within_budget(result) enforce route-specific thresholds.

AI assistance:

• Failure RCA — ai_assist.llm_assist.explain_failure(test_name, error_repr, console=, network=, steps=) asks the registered LLM for {likely_cause, evidence, next_steps, confidence}.

MCP Server

WebRunner ships a Model Context Protocol server so any MCP-aware client (Claude, IDE plugins, etc.) can drive WebRunner over JSON-RPC stdio.

python -m je_web_runner.mcp_server

The default tool list (19 tools) exposes:

Action JSON authoring & linting:

• webrunner_lint_action, webrunner_score_action_locators, webrunner_locator_strength
• webrunner_format_actions, webrunner_parse_markdown, webrunner_render_template
• webrunner_translate_actions_to_playwright, webrunner_translate_python_to_playwright

Code generation:

• webrunner_pom_from_html

Quality / triage:

• webrunner_a11y_diff, webrunner_cluster_failures, webrunner_compute_trend

Security & privacy:

• webrunner_scan_pii, webrunner_redact_pii

Reporting & contract:

• webrunner_summary_markdown, webrunner_validate_response

Sharding & infra:

• webrunner_diff_shard, webrunner_render_k8s, webrunner_partition_shard

from je_web_runner.mcp_server import McpServer, Tool, build_default_tools, serve_stdio

# Or build a custom server
server = McpServer()
for tool in build_default_tools():
    server.register(tool)
server.register(Tool(
    name="my_custom_tool",
    description="…",
    input_schema={"type": "object", "properties": {"x": {"type": "string"}}},
    handler=lambda args: f"hello {args['x']}",
))
serve_stdio(server=server)

The server speaks MCP 2024-11-05: initialize, tools/list, tools/call, resources/list, ping, shutdown.

Action JSON LSP

A standard Language Server Protocol implementation for action JSON files:

python -m je_web_runner.action_lsp

textDocument/completion returns every registered WR_* command; textDocument/publishDiagnostics runs the action linter on didOpen / didChange. Pair with VS Code's Configure JSON Language Servers or the JetBrains LSP plugin.

Even More Capabilities (polish wave)

CLI & orchestration polish:

• Regex test selector — test_filter.name_filter.filter_paths(paths, include=["smoke.*"], exclude=["slow"]) keeps only matching candidate paths; orthogonal to the existing tag filter.
• Process supervisor — process_supervisor.ProcessSupervisor().kill_orphans() walks the OS process table for chromedriver / geckodriver / msedgedriver and kills stragglers (skips os.getpid() automatically). with_watchdog(callable, timeout_seconds=300) wraps a long callable with a hard wall-clock raise.
• Pipeline DSL — pipeline.load_pipeline({"stages": [...]}) + run_pipeline(pipeline, runner) execute multi-stage gates: continue_on_failure=True makes a stage non-blocking (linters / scanners), otherwise downstream stages skip.

Frontend / mobile / coverage:

• Storybook visual snapshots — storybook.visual_snapshots.capture_story_snapshots(stories, base_url, take_screenshot, navigate, baseline_dir=...) walks every story, persists deterministic filenames (components-button--primary.png), and diffs against an optional baseline. assert_no_visual_regressions(report) is the gate.
• Appium gestures — appium_integration.gestures ships swipe, scroll, long_press, pinch, double_tap that prefer Appium's mobile: named-gesture extension and fall back to W3C Actions on older drivers.
• Coverage map — coverage_map.build_coverage_map("./actions") walks every action JSON file, normalises WR_to_url paths (/users/42 → /users/:id) and produces a route → files reverse index. coverage.uncovered(declared_routes) answers "which routes have no test?".

Even More Capabilities (final wave)

Debugging & reproducibility:

• CDP message tap — cdp_tap.CdpRecorder("cdp.ndjson").attach(driver) wraps execute_cdp_cmd so every command + return value is appended to an ndjson log; CdpReplayer(load_recording(...)) plays it back against a stub for offline debugging.
• Cross-browser parity — cross_browser.diff_runs([chromium_run, firefox_run, webkit_run]) diffs title / DOM hash / console / network status / screenshot hash, classifying each finding as major (5xx, title, DOM mismatch) or minor. assert_parity(report, only_major=True) is the gate.
• Browser state diff — state_diff.capture_state(driver) snapshots cookies + localStorage + sessionStorage; diff_states(before, after) lists added / removed / changed keys per section so cart / auth flows stay traceable.

Authoring / scaffolding:

• Page Object codegen — pom_codegen.discover_elements_from_html(html) walks every element with data-testid / id / form name; render_pom_module(elements, class_name="LoginPage") returns a Python module with one TestObject property per element.

CI reproducibility:

• Workspace lock file — workspace_lock.build_lock(drivers=..., playwright_versions={"chromium": "127.0.0.0"}) snapshots every Python distribution + driver version + Playwright browser version; write_lock(lock, ".webrunner/lock.json") and diff_locks(before, after) complete the pipeline.

Long-running observability:

• A11y trend dashboard — a11y_trend.aggregate_history(history) buckets axe runs by day and impact; render_html(points) produces a self-contained SVG line chart so regressions are visible at a glance.
• Perf drift detector — perf_drift.detect_drift({"lcp_ms": samples}, baseline_window=20, recent_window=5) compares the recent P95 against a rolling baseline P95 and flags drift outside tolerance. assert_no_regression(report) is the strict path; higher_is_better={"frame_rate"} for inverted metrics.

Even More Capabilities (newest wave)

Authoring / formatting:

• Action JSON formatter — action_formatter.format_actions(actions) writes a canonical multi-line array with kwargs in a stable preferred-then-alphabetical order; format_file(path) reformats in place and reports (text, changed).
• Markdown → action JSON — md_authoring.parse_markdown(text) understands - open <url>, - click #id, - type "x" into <selector>, - wait 3s, - assert title "...", - press Enter, - screenshot, - run template <name>, - quit. Lines that don't match are preserved as WR__note so the round-trip is loss-less.

Triage / production observability:

• Failure clustering — failure_cluster.cluster_failures(failures, top_n=5) reduces each error message to a stable signature (strips timestamps, hex addresses, line numbers, paths, large numerics, quoted substrings) so the same root cause across runs lands in one bucket.
• Synthetic monitoring — synthetic_monitoring.SyntheticMonitor(alert_sink).register("homepage", check) reruns checks; the sink only fires on edge transitions (green → red / red → green) with failure_threshold / recovery_threshold to silence flapping.
• OTLP exporter — observability.otlp_exporter.configure_otlp_export(provider, OtlpExportConfig(endpoint="https://otlp:4317")) ships the existing OTel spans to Jaeger / Tempo / any OTLP backend (gRPC by default, HTTP fallback).

Frontend / component:

• Storybook integration — storybook.discover_stories(index_path) reads Storybook 7+ index.json (or legacy stories.json); plan_actions_for_stories(stories, base_url, run_a11y=True) builds a flat action list visiting each story in iframe mode and running axe + screenshot.
• Shadow DOM auto-pierce — dom_traversal.shadow_pierce.find_first(driver, "button.primary") recursively walks open shadow roots (Selenium execute_script or Playwright evaluate) so a single CSS selector can match across shadow boundaries.

Even More Capabilities (latest wave)

Onboarding / migration:

• Workspace bootstrapper — python -m je_web_runner --init (or bootstrapper.init_workspace("my-tests")) drops actions/sample.json, .webrunner/ledger.json, pinned-driver template, JSON schema, pre-commit hook, and a starter GitHub Actions workflow.
• Driver pinner — driver_pin.install_for_browser(".webrunner/drivers.json", "firefox") reads a JSON pin file (name / version / url / archive_format / binary_inside), downloads + extracts once, then serves from cache. Bypasses the GitHub API rate limit that webdriver-manager hits in CI.
• Selenium → Playwright translator — sel_to_pw.translate_python_source(text) rewrites driver.find_element(By.ID, "x") → page.locator("#x") and similar; translate_action_list(actions) rewrites WR_* action JSON to its WR_pw_* equivalent (drops WR_implicitly_wait since Playwright auto-waits).

Test authoring:

• Form auto-fill — form_autofill.plan_fill_actions(fields, fixture, submit_locator=...) infers each field from data-testid / id / name / placeholder / label / type and emits a ready-to-run WR_save_test_object + WR_element_input sequence.

Quality:

• A11y diff — accessibility.a11y_diff.diff_violations(baseline, current) buckets axe-core findings into added / resolved / persisting keyed on (rule_id, target); assert_no_regressions(diff, allow_rules=...) is the CI gate.

Performance / orchestration:

• Fan-out — fanout.run_fan_out([("preflight-a", task_a), task_b, ...], max_workers=4) runs read-only callables concurrently inside one test, returning per-task duration + outcome with raise_for_failures() for the strict path.
• Event bus — event_bus.EventBus(".webrunner/events.log").publish("setup-done", {"shard": 1}); subscribers poll() from a remembered offset or wait_for(topic, predicate=..., timeout=30). File-backed ndjson — no Redis dependency.

Browser internals:

• Extension test harness — extension_harness.parse_manifest("./ext") reads MV2 / MV3 manifests; apply_to_chrome_options(options, [ext_dir]) adds --load-extension flags; playwright_persistent_context_args(...) returns the kwargs needed for launch_persistent_context.

Even More Capabilities

Reliability & dev-loop:

• Browser pool — browser_pool.BrowserPool(factory, size=4, max_uses=50).warm(); with pool.session() as ses: … removes browser cold-start from local dev. Health check + recycle policy built in.
• WebDriver BiDi bridge — bidi_backend.BidiBridge().subscribe(target, "console", callback) works against either Selenium 4 BiDi (driver.script.add_console_message_handler) or Playwright page.on(...). register_translator lets you wire custom event names.

Determinism & offline runs:

• HAR replay server — har_replay.HarReplayServer(load_har("recorded.har")).start() boots a local HTTP server that serves recorded responses; supports literal / glob / re: URL matching with rotation across duplicates. Drop-in for staging-API outages.

Quality / privacy:

• PII scanner — pii_scanner.scan_text(text) finds emails, E.164 phones, Luhn-validated credit cards, US SSN, ROC ID, and IPv4. assert_no_pii(text, allow_categories=...) for CI gates; redact_text(text) returns a sanitised copy.
• Visual diff review UI — visual_review.VisualReviewServer(baseline_dir, current_dir).start() opens a local web UI showing each baseline / current pair side-by-side with an Accept current as baseline button (idempotent file copy with path-traversal guard).

Test orchestration:

• Test impact analysis — impact_analysis.build_index("./actions") walks every action JSON file and projects locator names, URLs, template names, and WR_* commands into a reverse index; affected_action_files(index, locators=["primary_cta"]) answers "which tests touch this?" so diff-aware shards can go beyond filename matching.

Browser Internals

from je_web_runner import (
    selenium_cdp,                 # raw CDP
    pw_emulate, pw_set_locale,    # mobile / locale
)
from je_web_runner.utils.storage.browser_storage import (
    selenium_local_storage_set,
    selenium_indexed_db_drop,
)
from je_web_runner.utils.observability.event_capture import (
    start_event_capture,
    assert_no_console_errors,
    assert_no_5xx,
)
from je_web_runner.utils.dom_traversal.shadow_iframe import (
    selenium_query_in_shadow,
    playwright_shadow_selector,
    selenium_switch_iframe_chain,
)
from je_web_runner.utils.file_transfer.file_helpers import (
    selenium_upload_file,
    wait_for_download,
)
from je_web_runner.utils.extensions.extension_loader import (
    selenium_chrome_options_with_extension,
    playwright_extension_launch_args,
)

Service worker / cache control, console + network event capture and assertions, file upload via element + download dir watcher, browser extension loaders for Chromium-family.

Test Data

from je_web_runner import (
    load_env, get_env, expand_in_action,                   # .env + ${ENV.X}
    load_dataset_csv, load_dataset_json, run_with_dataset, # data-driven + ${ROW.x}
    fake_email, fake_name, fake_credit_card, fake_value,   # faker
)
from je_web_runner.utils.factories.factory import user_factory, order_factory
from je_web_runner.utils.testcontainers_integration.containers import (
    start_postgres,
    start_redis,
    cleanup_all,
)

Every helper is JSON-callable too (WR_load_env, WR_load_dataset_csv, WR_run_with_dataset, WR_faker_email, WR_user_factory, WR_tc_postgres, …).

Auth & APIs

from je_web_runner import (
    http_get, http_post, http_assert_status, http_assert_json_contains,
)
from je_web_runner.utils.auth.oauth import (
    client_credentials_token,
    bearer_header,
)
from je_web_runner.utils.database.db_validate import (
    db_query,
    db_assert_count,
    db_assert_value,
)

token = client_credentials_token(
    "https://idp.example/oauth2/token",
    "client-id", "client-secret",
    cache_key="default",
)
http_get("https://api.example/users/me", headers=bearer_header(token["access_token"]))
http_assert_status(200)
http_assert_json_contains("role", "admin")

db_assert_count(
    "postgresql+psycopg://user:pw@host/db",
    "SELECT 1 FROM orders WHERE user_id = :uid",
    expected=1,
    params={"uid": 42},
)

OAuth2 helpers cache tokens in-process and refresh 30 seconds before expiry.

Recorder

from je_web_runner import (
    recorder_start,
    recorder_stop,
    recorder_save_recording,
)

recorder_start(webdriver_wrapper_instance)
# … user clicks / inputs in the browser …
recorder_save_recording(
    webdriver_wrapper_instance,
    output_path="./recorded.json",
    raw_events_path="./raw.json",  # optional — debugging
)

The recorder injects a static JS listener (no CDP, no eval), so it works on Chrome / Firefox / Edge alike. Sensitive fields are masked by default — type=password, names matching password / card_number / cvv / ssn / secret / token / api_key / otp / passcode, and 13–19-digit numeric values are replaced with ***MASKED***.

CI / Integrations

from je_web_runner.utils.notifier.webhook_notifier import notify_run_summary
from je_web_runner.utils.test_management.jira_client import jira_create_failure_issues
from je_web_runner.utils.test_management.testrail_client import (
    testrail_send_results,
    testrail_results_from_pairs,
)
from je_web_runner.utils.ci_annotations.github_annotations import (
    emit_failure_annotations,
    emit_from_junit_xml,
)

For GitHub Actions inline annotations, run emit_from_junit_xml("run_junit.xml") after generate_junit_xml_report — failed test cases surface as ::error file=…:: lines on the PR diff.

docker/docker-compose.yml ships a Selenium Grid 4 stack (hub + Chrome + Firefox nodes); docker/.env.example exposes the version pin and concurrency settings.

The IDE config examples under docs/ide/ wire VS Code and JetBrains to the action JSON schema produced by WR_export_action_schema.

AI Assistance

from je_web_runner.utils.ai_assist.llm_assist import (
    set_llm_callable,
    suggest_locator,
    generate_actions_from_prompt,
)

# Plug in any callable that returns a string:
def my_llm(prompt: str) -> str:
    # call OpenAI / Anthropic / local Ollama / mock
    ...

set_llm_callable(my_llm)

locator = suggest_locator(html_blob, description="primary submit button")
draft = generate_actions_from_prompt("log in as alice and place an order")

WebRunner intentionally ships no built-in LLM client — the boundary is a single Callable[[str], str] so swapping provider is one line.

CLI Usage

# Original entry points (unchanged):
python -m je_web_runner -e actions.json
python -m je_web_runner -d ./actions/
python -m je_web_runner --execute_str '[["WR_quit_all"]]'

# Newer flags:
python -m je_web_runner -d ./actions --tag smoke --exclude-tag slow
python -m je_web_runner -d ./actions --parallel 4 --parallel-mode process
python -m je_web_runner -d ./actions --ledger ledger.json
python -m je_web_runner -d ./actions --rerun-failed ledger.json
python -m je_web_runner -d ./actions --shard 1/4
python -m je_web_runner -d ./actions --watch ./actions
python -m je_web_runner --report run                          # JSON + HTML + XML + JUnit
python -m je_web_runner --validate ./action_smoke.json
python -m je_web_runner --migrate ./actions --migrate-dry-run

Compose any of the flags above; the dispatcher applies tag filters → ledger / re-run-failed → sharding → dependency-aware ordering before handing files to the runner.

Test Record

from je_web_runner import test_record_instance

test_record_instance.set_record_enable(True)
# … perform automation …
records = test_record_instance.test_record_list
# Each record: {"function_name", "local_param", "time", "program_exception"}
test_record_instance.clean_record()

Exception Handling

WebRunner provides a hierarchy of custom exceptions — every helper raises a domain-specific subclass of WebRunnerException:

Exception	Description
WebRunnerException	Base
WebRunnerWebDriverNotFoundException	WebDriver not found
WebRunnerOptionsWrongTypeException	Invalid options type
WebRunnerArgumentWrongTypeException	Invalid argument type
WebRunnerWebDriverIsNoneException	WebDriver is None
WebRunnerExecuteException	Action execution error
WebRunnerJsonException	JSON processing error
WebRunnerGenerateJsonReportException	JSON / XML / JUnit / Allure report error
WebRunnerHTMLException	HTML report error
WebRunnerAddCommandException	Custom command registration error
WebRunnerAssertException	Assertion failure
XMLException / XMLTypeException	XML processing error
CallbackExecutorException	Callback execution error
PlaywrightBackendError	Playwright backend / element failure
PlaywrightLocatorError	TestObject → Playwright selector mapping
RecorderError / VisualRegressionError	Recorder / visual regression
HealingError / EnvConfigError / DataDrivenError	Self-healing / env / dataset
HttpAssertionError / HttpError	HTTP API assertions
AccessibilityError / LighthouseError	a11y / Lighthouse
NotifierError / JiraError / TestRailError	Notifications / test management
CDPError / StorageError / ServiceWorkerError	Browser internals
OAuthError / DatabaseValidationError	Auth / DB
NetworkEmulationError / LoadTestError	Throttling / Locust
ShardingError / MigrationError / ActionLinterError	Orchestration / linting
LLMAssistError / OTelTracingError	AI / observability

Logging

WebRunner uses a rotating file handler:

• Log file: WEBRunner.log
• Level: WARNING+
• Max size: 1 GB
• Format: %(asctime)s | %(name)s | %(levelname)s | %(message)s

Supported Browsers

Browser	Selenium key	Playwright
Google Chrome	chrome	chromium
Chromium	chromium	chromium
Mozilla Firefox	firefox	firefox
Microsoft Edge	edge	chromium
Internet Explorer	ie	n/a
Apple Safari	safari	webkit

Supported Platforms

• Windows
• macOS
• Ubuntu / Linux
• Raspberry Pi

License

This project is licensed under the MIT License.