Bug 1656768 - Add a test to ensure sessionStorage is propagated from non-cross-origin-isolated to cross-origin-isolated window and vice versa; r=nika

Differential Revision: https://phabricator.services.mozilla.com/D97763

dom/tests/browser/browser.ini

@@ -80,6 +80,8 @@ support-files =
 [browser_sessionStorage_navigation.js]
 support-files =
   file_empty.html
+  file_coop_coep.html
+  file_coop_coep.html^headers^
 [browser_test_focus_after_modal_state.js]
 skip-if = verify
 support-files =

dom/tests/browser/browser_sessionStorage_navigation.js

@@ -6,10 +6,11 @@ const DIRPATH = getRootDirectory(gTestPath).replace(
 );
 const PATH = DIRPATH + "file_empty.html";
 
-const ORIGIN1 = "http://example.com";
-const ORIGIN2 = "http://example.org";
+const ORIGIN1 = "https://example.com";
+const ORIGIN2 = "https://example.org";
 const URL1 = `${ORIGIN1}/${PATH}`;
 const URL2 = `${ORIGIN2}/${PATH}`;
+const URL1_WITH_COOP_COEP = `${ORIGIN1}/${DIRPATH}file_coop_coep.html`;
 
 add_task(async function() {
   await BrowserTestUtils.withNewTab(URL1, async function(browser) {
@@ -34,8 +35,8 @@ add_task(async function() {
         is(
           value1,
           null,
-          `SessionStroage for ${key} in  ${content.window.origin} is null since` +
-            ` it's the first visit`
+          `SessionStorage for ${key} in ${content.window.origin} is null ` +
+            `since it's the first visit`
         );
 
         content.window.sessionStorage.setItem(key, value);
@@ -44,7 +45,8 @@ add_task(async function() {
         is(
           value2,
           value,
-          `SessionStorage for ${key} in ${content.window.origin} is set correctly`
+          `SessionStorage for ${key} in ${content.window.origin} is set ` +
+            `correctly`
         );
       }
     );
@@ -62,7 +64,7 @@ add_task(async function() {
         is(
           value1,
           null,
-          `SessionStroage for ${key} in ${content.window.origin} is null ` +
+          `SessionStorage for ${key} in ${content.window.origin} is null ` +
             `since it's the first visit`
         );
       }
@@ -116,7 +118,8 @@ add_task(async function() {
             is(
               value1,
               value,
-              `SessionStorage for ${key} in ${content.window.origin} is preserved`
+              `SessionStorage for ${key} in ${content.window.origin} is ` +
+                `preserved`
             );
           }
         );
@@ -164,5 +167,84 @@ add_task(async function() {
         );
       }
     );
+
+    info(
+      `Verifying the sessionStorage for a tab shares between ` +
+        `cross-origin-isolated and non cross-origin-isolated environments`
+    );
+    const anotherKey = `anotherKey`;
+    const anotherValue = `anotherValue;`;
+
+    BrowserTestUtils.loadURI(browser, URL1_WITH_COOP_COEP);
+    await BrowserTestUtils.browserLoaded(browser);
+
+    await SpecialPowers.spawn(
+      browser,
+      [ORIGIN1, key, value, anotherKey, anotherValue],
+      async (ORIGIN, key, value, anotherKey, anotherValue) => {
+        is(content.window.origin, ORIGIN, `Navigate to ${ORIGIN} as expected`);
+        ok(
+          content.window.crossOriginIsolated,
+          `The window is cross-origin-isolated.`
+        );
+
+        let value1 = content.window.sessionStorage.getItem(key);
+        is(
+          value1,
+          value,
+          `SessionStorage for ${key} in ${content.window.origin} was ` +
+            `propagated to COOP+COEP process correctly.`
+        );
+
+        let value2 = content.window.sessionStorage.getItem(anotherKey);
+        is(
+          value2,
+          null,
+          `SessionStorage for ${anotherKey} in ${content.window.origin} ` +
+            `hasn't been set yet.`
+        );
+
+        content.window.sessionStorage.setItem(anotherKey, anotherValue);
+
+        let value3 = content.window.sessionStorage.getItem(anotherKey);
+        is(
+          value3,
+          anotherValue,
+          `SessionStorage for ${anotherKey} in ${content.window.origin} ` +
+            `was set as expected.`
+        );
+      }
+    );
+
+    BrowserTestUtils.loadURI(browser, URL1);
+    await BrowserTestUtils.browserLoaded(browser);
+
+    await SpecialPowers.spawn(
+      browser,
+      [ORIGIN1, key, value, anotherKey, anotherValue],
+      async (ORIGIN, key, value, anotherKey, anotherValue) => {
+        is(content.window.origin, ORIGIN, `Navigate to ${ORIGIN} as expected`);
+        ok(
+          !content.window.crossOriginIsolated,
+          `The window is not cross-origin-isolated.`
+        );
+
+        let value1 = content.window.sessionStorage.getItem(key);
+        is(
+          value1,
+          value,
+          `SessionStorage for ${key} in ${content.window.origin} is ` +
+            `preserved.`
+        );
+
+        let value2 = content.window.sessionStorage.getItem(anotherKey);
+        is(
+          value2,
+          anotherValue,
+          `SessionStorage for ${anotherKey} in ${content.window.origin} was ` +
+            `propagated to non-COOP+COEP process correctly.`
+        );
+      }
+    );
   });
 });

dom/tests/browser/file_coop_coep.html^headers^

@@ -0,0 +1,2 @@
+Cross-Origin-Opener-Policy: same-origin
+Cross-Origin-Embedder-Policy: require-corp