1 files changed, 42 insertions, 0 deletions
diff --git a/test/unit/utils.py b/test/unit/utils.py
index 4d8766e..90a2ab7 100644
--- a/test/unit/utils.py
+++ b/test/unit/utils.py
@@ -26,6 +26,7 @@ Various functions and objects that can be reused between unit tests
 # proprietary program, I am not going to enforce this in court.
 
 from hashlib import sha256
+from selenium.webdriver.support.ui import WebDriverWait
 
 from ..script_loader import load_script
 
@@ -200,3 +201,44 @@ def are_scripts_allowed(driver, nonce=None):
             return document.haketilo_scripts_allowed;
             ''',
             nonce)
+
+"""
+tab_id_responder is meant to be appended to background script of a test
+extension.
+"""
+tab_id_responder = '''
+function tell_tab_id(msg, sender, respond_cb) {
+    if (msg[0] === "learn_tab_id")
+        respond_cb(sender.tab.id);
+}
+browser.runtime.onMessage.addListener(tell_tab_id);
+'''
+
+"""
+tab_id_asker is meant to be appended to content script of a test extension.
+"""
+tab_id_asker = '''
+browser.runtime.sendMessage(["learn_tab_id"])
+    .then(tid => window.wrappedJSObject.haketilo_tab = tid);
+'''
+
+def run_content_script_in_new_window(driver, url):
+    """
+    Expect an extension to be loaded which had tab_id_responder and tab_id_asker
+    appended to its background and content scripts, respectively.
+    Open the provided url in a new tab, find its tab id and return it, with
+    current window changed back to the initial one.
+    """
+    initial_handle = driver.current_window_handle
+    handles = driver.window_handles
+    driver.execute_script('window.open(arguments[0], "_blank");', url)
+    WebDriverWait(driver, 10).until(lambda d: d.window_handles is not handles)
+    new_handle = [h for h in driver.window_handles if h not in handles][0]
+
+    driver.switch_to.window(new_handle)
+
+    get_tab_id = lambda d: d.execute_script('return window.haketilo_tab;')
+    tab_id = WebDriverWait(driver, 10).until(get_tab_id)
+
+    driver.switch_to.window(initial_handle)
+    return tab_id