zjsunit: Do not run $(...) automatically.

We have generally gone away from using $(...)
initialization in modules that we test with
zjsunit, but there are a few remaining special
cases related to our billing and portico
codebases.

frontend_tests/node_tests/billing.js

@@ -22,6 +22,8 @@ const helpers = mock_esm("../../static/js/billing/helpers", {
     set_tab: () => {},
 });
 
+zrequire("billing/billing");
+
 run_test("initialize", (override) => {
     let token_func;
 
@@ -69,7 +71,7 @@ run_test("initialize", (override) => {
     $("#payment-method").data = (key) =>
         document.querySelector("#payment-method").getAttribute("data-" + key);
 
-    zrequire("billing/billing");
+    $.get_initialize_function()();
 
     assert(set_tab_called);
     assert(stripe_checkout_configure_called);

frontend_tests/node_tests/common.js

@@ -16,7 +16,9 @@ const common = zrequire("common");
 
 run_test("basics", () => {
     common.autofocus("#home");
+    $.get_initialize_function()();
     assert($("#home").is_focused());
+    $.clear_initialize_function();
 });
 
 run_test("phrase_match", () => {

frontend_tests/node_tests/stream_edit.js

@@ -8,7 +8,7 @@ const {run_test} = require("../zjsunit/test");
 const $ = require("../zjsunit/zjquery");
 
 const noop = () => {};
-stub_templates(() => noop);
+stub_templates(() => "<stub>");
 
 const page_params = set_global("page_params", {});
 mock_cjs("jquery", $);

frontend_tests/node_tests/support.js

@@ -14,9 +14,10 @@ const dom = new JSDOM(template, {pretendToBeVisual: true});
 const document = dom.window.document;
 
 mock_cjs("jquery", $);
+zrequire("../js/analytics/support");
 
 run_test("scrub_realm", () => {
-    zrequire("../js/analytics/support");
+    $.get_initialize_function()();
     const click_handler = $("body").get_on_handler("click", ".scrub-realm-button");
 
     const fake_this = $.create("fake-.scrub-realm-button");

frontend_tests/node_tests/upgrade.js

@@ -28,6 +28,7 @@ set_global("page_params", {
 mock_cjs("jquery", $);
 
 const helpers = zrequire("../js/billing/helpers");
+zrequire("../js/billing/upgrade");
 
 run_test("initialize", (override) => {
     let token_func;
@@ -103,7 +104,7 @@ run_test("initialize", (override) => {
     $("#autopay-form").data = (key) =>
         document.querySelector("#autopay-form").getAttribute("data-" + key);
 
-    zrequire("../js/billing/upgrade");
+    $.get_initialize_function()();
 
     const e = {
         preventDefault: noop,