Bug 1613092 - Support Regexp in checkIntervention. r=adw

Differential Revision: https://phabricator.services.mozilla.com/D61565

--HG--
extra : moz-landing-system : lando

browser/components/urlbar/tests/browser/browser_urlbar_interventions.js

@@ -35,7 +35,7 @@ add_task(async function refresh() {
     tip: TIPS.REFRESH,
     title:
       "Restore default settings and remove old add-ons for optimal performance.",
-    button: "Refresh Nightly…",
+    button: /^Refresh .+…$/,
     awaitCallback() {
       return promiseAlertDialog("cancel", [
         "chrome://global/content/resetProfile.xhtml",

browser/components/urlbar/tests/browser/head.js

@@ -103,8 +103,23 @@ async function checkIntervention({
   // Do a search that triggers the tip.
   let [result, element] = await awaitTip(searchString);
   Assert.strictEqual(result.payload.type, tip);
-  Assert.equal(element._elements.get("title").textContent, title);
-  Assert.equal(element._elements.get("tipButton").textContent, button);
+
+  let actualTitle = element._elements.get("title").textContent;
+  if (typeof title == "string") {
+    Assert.equal(actualTitle, title, "Title string");
+  } else {
+    // regexp
+    Assert.ok(title.test(actualTitle), "Title regexp");
+  }
+
+  let actualButton = element._elements.get("tipButton").textContent;
+  if (typeof button == "string") {
+    Assert.equal(actualButton, button, "Button string");
+  } else {
+    // regexp
+    Assert.ok(button.test(actualButton), "Button regexp");
+  }
+
   Assert.ok(BrowserTestUtils.is_visible(element._elements.get("helpButton")));
 
   let values = await Promise.all([awaitCallback(), pickTip()]);