Bug 1682780 - [devtools] Remove unused callback arguments from xpshell debugger test helpers. r=nchevobbe

Differential Revision: https://phabricator.services.mozilla.com/D99918

devtools/server/tests/xpcshell/head_dbg.js

@@ -361,7 +361,7 @@ function addTestGlobal(name, server = DevToolsServer) {
 }
 
 // List the DevToolsClient |client|'s tabs, look for one whose title is
-// |title|, and apply |callback| to the packet's entry for that tab.
+// |title|.
 async function getTestTab(client, title) {
   const tabs = await client.mainRoot.listTabs();
   for (const tab of tabs) {
@@ -382,10 +382,9 @@ async function attachTestTab(client, title) {
 }
 
 // Attach to |client|'s tab whose title is |title|, and then attach to
-// that tab's thread. Pass |callback| the thread attach response packet, a
-// TargetFront referring to the tab, and a ThreadFront referring to the
-// thread.
-async function attachTestThread(client, title, callback = () => {}) {
+// that tab's thread. Return the TargetFront referring to the tab,
+// and a ThreadFront referring to the thread.
+async function attachTestThread(client, title) {
   const targetFront = await attachTestTab(client, title);
   const threadFront = await targetFront.getFront("thread");
   const onPaused = threadFront.once("paused");
@@ -396,18 +395,15 @@ async function attachTestThread(client, title, callback = () => {}) {
   Assert.equal(threadFront.state, "paused", "Thread client is paused");
   Assert.ok("why" in response);
   Assert.equal(response.why.type, "attached");
-  callback(response, targetFront, threadFront);
   return { targetFront, threadFront };
 }
 
 // Attach to |client|'s tab whose title is |title|, attach to the tab's
-// thread, and then resume it. Pass |callback| the thread's response to
-// the 'resume' packet, a TargetFront for the tab, and a ThreadFront for the
-// thread.
-async function attachTestTabAndResume(client, title, callback = () => {}) {
+// thread, and then resume it. Return the TargetFront for the tab,
+// and a ThreadFront for the thread.
+async function attachTestTabAndResume(client, title) {
   const { targetFront, threadFront } = await attachTestThread(client, title);
-  const response = await threadFront.resume();
-  callback(response, targetFront, threadFront);
+  await threadFront.resume();
   return { targetFront, threadFront };
 }