Bug 1660485 - Add a test to veirfy the SessionStorage for a tab is preserved during navigation; r=nika

Differential Revision: https://phabricator.services.mozilla.com/D87897

dom/tests/browser/browser.ini

@@ -77,6 +77,9 @@ support-files =
 support-files =
   test_mixed_content_image.html
 [browser_pointerlock_warning.js]
+[browser_sessionStorage_navigation.js]
+support-files =
+  file_empty.html
 [browser_test_focus_after_modal_state.js]
 skip-if = verify
 support-files =

dom/tests/browser/browser_sessionStorage_navigation.js

@@ -0,0 +1,126 @@
+"use strict";
+
+const DIRPATH = getRootDirectory(gTestPath).replace(
+  "chrome://mochitests/content/",
+  ""
+);
+const PATH = DIRPATH + "file_empty.html";
+
+const ORIGIN1 = "http://example.com";
+const ORIGIN2 = "http://example.org";
+const URL1 = `${ORIGIN1}/${PATH}`;
+const URL2 = `${ORIGIN2}/${PATH}`;
+
+add_task(async function() {
+  await BrowserTestUtils.withNewTab(URL1, async function(browser) {
+    const key = "key";
+    const value = "value";
+
+    info(
+      `Verifying sessionStorage is preserved after navigating to a ` +
+        `cross-origin site and then navigating back`
+    );
+
+    BrowserTestUtils.loadURI(browser, URL1);
+    await BrowserTestUtils.browserLoaded(browser);
+
+    await SpecialPowers.spawn(
+      browser,
+      [ORIGIN1, key, value],
+      async (ORIGIN, key, value) => {
+        is(content.window.origin, ORIGIN, `Navigate to ${ORIGIN} as expected`);
+
+        let value1 = content.window.sessionStorage.getItem(key);
+        is(
+          value1,
+          null,
+          `SessionStroage for ${key} in  ${content.window.origin} is null since` +
+            ` it's the first visit`
+        );
+
+        content.window.sessionStorage.setItem(key, value);
+
+        let value2 = content.window.sessionStorage.getItem(key);
+        is(
+          value2,
+          value,
+          `SessionStorage for ${key} in ${content.window.origin} is set correctly`
+        );
+      }
+    );
+
+    BrowserTestUtils.loadURI(browser, URL2);
+    await BrowserTestUtils.browserLoaded(browser);
+
+    await SpecialPowers.spawn(
+      browser,
+      [ORIGIN2, key, value],
+      async (ORIGIN, key, value) => {
+        is(content.window.origin, ORIGIN, `Navigate to ${ORIGIN} as expected`);
+
+        let value1 = content.window.sessionStorage.getItem(key);
+        is(
+          value1,
+          null,
+          `SessionStroage for ${key} in ${content.window.origin} is null ` +
+            `since it's the first visit`
+        );
+      }
+    );
+
+    BrowserTestUtils.loadURI(browser, URL1);
+    await BrowserTestUtils.browserLoaded(browser);
+
+    await SpecialPowers.spawn(
+      browser,
+      [ORIGIN1, key, value],
+      async (ORIGIN, key, value) => {
+        is(content.window.origin, ORIGIN, `Navigate to ${ORIGIN} as expected`);
+
+        let value1 = content.window.sessionStorage.getItem(key);
+        is(
+          value1,
+          value,
+          `SessionStorage for ${key} in ${content.window.origin} is preserved`
+        );
+      }
+    );
+
+    info(`Verifying sessionStorage is preserved for ${URL1} after navigating`);
+
+    BrowserTestUtils.loadURI(browser, URL2);
+    await BrowserTestUtils.browserLoaded(browser);
+
+    await SpecialPowers.spawn(
+      browser,
+      [ORIGIN2, ORIGIN1, URL1, key, value],
+      async (ORIGIN, iframeORIGIN, iframeURL, key, value) => {
+        is(content.window.origin, ORIGIN, `Navigate to ${ORIGIN} as expected`);
+
+        let iframe = content.document.createElement("iframe");
+        iframe.src = iframeURL;
+        content.document.body.appendChild(iframe);
+        await ContentTaskUtils.waitForEvent(iframe, "load");
+
+        await content.SpecialPowers.spawn(
+          iframe,
+          [iframeORIGIN, key, value],
+          async function(ORIGIN, key, value) {
+            is(
+              content.window.origin,
+              ORIGIN,
+              `Navigate to ${ORIGIN} as expected`
+            );
+
+            let value1 = content.window.sessionStorage.getItem(key);
+            is(
+              value1,
+              value,
+              `SessionStorage for ${key} in ${content.window.origin} is preserved`
+            );
+          }
+        );
+      }
+    );
+  });
+});