bug 1570378: remote: add bc test helper setup() for empty documents r=remote-protocol-reviewers,jdescottes

For many browser-chrome (bc) tests is does not matter what the
document is, as long as it is does not cause state to bleed over
from the previous test.

For these cases this patch introduces a shorthand, setup(), which
calls setupForURL(url) with an empty document generated by toDataURL("").

Differential Revision: https://phabricator.services.mozilla.com/D40216

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

remote/test/browser/browser_page_javascriptDialog_alert.js

@@ -3,12 +3,10 @@
 
 "use strict";
 
-const TEST_URI = "data:text/html;charset=utf-8,default-test-page";
-
 // Test a browser alert is detected via Page.javascriptDialogOpening and can be
 // closed with Page.handleJavaScriptDialog
 add_task(async function() {
-  const { client, tab } = await setupTestForUri(TEST_URI);
+  const { client, tab } = await setup();
 
   const { Page } = client;
 

remote/test/browser/browser_page_javascriptDialog_beforeunload.js

@@ -3,8 +3,6 @@
 
 "use strict";
 
-const TEST_URI = "data:text/html;charset=utf-8,default-test-page";
-
 // Test beforeunload dialog events.
 add_task(async function() {
   info("Allow to trigger onbeforeunload without user interaction");
@@ -15,7 +13,7 @@ add_task(async function() {
     SpecialPowers.pushPrefEnv(options, resolve);
   });
 
-  const { client, tab } = await setupTestForUri(TEST_URI);
+  const { client, tab } = await setup();
 
   const { Page } = client;
 

remote/test/browser/browser_page_javascriptDialog_confirm.js

@@ -3,12 +3,10 @@
 
 "use strict";
 
-const TEST_URI = "data:text/html;charset=utf-8,default-test-page";
-
 // Test for window.confirm(). Check that the dialog is correctly detected and that it can
 // be rejected or accepted.
 add_task(async function() {
-  const { client, tab } = await setupTestForUri(TEST_URI);
+  const { client, tab } = await setup();
 
   const { Page } = client;
 

remote/test/browser/browser_page_javascriptDialog_otherTarget.js

@@ -3,13 +3,13 @@
 
 "use strict";
 
-const TEST_URI = "data:text/html;charset=utf-8,default-test-page";
-const OTHER_URI = "data:text/html;charset=utf-8,other-test-page";
+const FIRST_DOC = toDataURL("default-test-page");
+const SECOND_DOC = toDataURL("other-test-page");
 
 // Test that javascript dialog events are emitted by the page domain only if
 // the dialog is created for the window of the target.
 add_task(async function() {
-  const { client, tab } = await setupTestForUri(TEST_URI);
+  const { client, tab } = await setupForURL(FIRST_DOC);
 
   const { Page } = client;
 
@@ -24,7 +24,7 @@ add_task(async function() {
   info("Open another tab");
   const otherTab = await BrowserTestUtils.openNewForegroundTab(
     gBrowser,
-    OTHER_URI
+    SECOND_DOC
   );
   is(gBrowser.selectedTab, otherTab, "Selected tab is now the new tab");
 

remote/test/browser/browser_page_javascriptDialog_prompt.js

@@ -3,12 +3,10 @@
 
 "use strict";
 
-const TEST_URI = "data:text/html;charset=utf-8,default-test-page";
-
 // Test for window.prompt(). Check that the dialog is correctly detected and that it can
 // be rejected or accepted, with a custom prompt text.
 add_task(async function() {
-  const { client, tab } = await setupTestForUri(TEST_URI);
+  const { client, tab } = await setup();
 
   const { Page } = client;
 

remote/test/browser/browser_runtime_callFunctionOn.js

@@ -7,7 +7,7 @@
 // See also browser_runtime_evaluate, which covers basic usages of this method.
 
 add_task(async function() {
-  const { client } = await setupForURL(toDataURL(""));
+  const { client } = await setup();
 
   const firstContext = await testRuntimeEnable(client);
   const contextId = firstContext.id;

remote/test/browser/browser_runtime_get_properties.js

@@ -6,7 +6,7 @@
 // Test the Runtime remote object
 
 add_task(async function() {
-  const { client } = await setupForURL(toDataURL(""));
+  const { client } = await setup();
 
   const firstContext = await testRuntimeEnable(client);
   const contextId = firstContext.id;

remote/test/browser/browser_runtime_remote_objects.js

@@ -6,7 +6,7 @@
 // Test the Runtime remote object
 
 add_task(async function() {
-  const { client } = await setupForURL(toDataURL(""));
+  const { client } = await setup();
 
   const firstContext = await testRuntimeEnable(client);
   const contextId = firstContext.id;

remote/test/browser/head.js

@@ -101,6 +101,14 @@ function getTargets(CDP) {
   });
 }
 
+/**
+ * Set up test environment in same fashion as setupForURL(),
+ * except using an empty document.
+ */
+async function setup() {
+  return setupForURL(toDataURL(""));
+}
+
 /**
  * Set up test environment by starting the remote agent, connecting
  * the CDP client over loopback, and creating a fresh tab to avoid