1 files changed, 150 insertions, 0 deletions
diff --git a/toolkit/components/extensions/test/xpcshell/test_ext_ipcBlob.js b/toolkit/components/extensions/test/xpcshell/test_ext_ipcBlob.js
new file mode 100644
index 0000000000..dd90d9bbc8
--- /dev/null
+++ b/toolkit/components/extensions/test/xpcshell/test_ext_ipcBlob.js
@@ -0,0 +1,150 @@
+"use strict";
+
+const server = createHttpServer();
+server.registerDirectory("/data/", do_get_file("data"));
+
+const BASE_URL = `http://localhost:${server.identity.primaryPort}/data`;
+
+// ExtensionContent.jsm needs to know when it's running from xpcshell,
+// to use the right timeout for content scripts executed at document_idle.
+ExtensionTestUtils.mockAppInfo();
+
+add_task(async function test_parent_to_child() {
+  async function background() {
+    const dbName = "broken-blob";
+    const dbStore = "blob-store";
+    const dbVersion = 1;
+    const blobContent = "Hello World!";
+
+    let db = await new Promise((resolve, reject) => {
+      let dbOpen = indexedDB.open(dbName, dbVersion);
+      dbOpen.onerror = event => {
+        browser.test.fail(`Error opening the DB: ${event.target.error}`);
+        browser.test.notifyFail("test-completed");
+        reject();
+      };
+      dbOpen.onsuccess = event => {
+        resolve(event.target.result);
+      };
+      dbOpen.onupgradeneeded = event => {
+        let dbobj = event.target.result;
+        dbobj.onerror = error => {
+          browser.test.fail(`Error updating the DB: ${error.target.error}`);
+          browser.test.notifyFail("test-completed");
+          reject();
+        };
+        dbobj.createObjectStore(dbStore);
+      };
+    });
+
+    async function save(blob) {
+      let txn = db.transaction([dbStore], "readwrite");
+      let store = txn.objectStore(dbStore);
+      let req = store.put(blob, "key");
+
+      return new Promise((resolve, reject) => {
+        req.onsuccess = () => {
+          resolve();
+        };
+        req.onerror = event => {
+          browser.test.fail(
+            `Error saving the blob into the DB: ${event.target.error}`
+          );
+          browser.test.notifyFail("test-completed");
+          reject();
+        };
+      });
+    }
+
+    async function load() {
+      let txn = db.transaction([dbStore], "readonly");
+      let store = txn.objectStore(dbStore);
+      let req = store.getAll();
+
+      return new Promise((resolve, reject) => {
+        req.onsuccess = () => resolve(req.result);
+        req.onerror = () => reject(req.error);
+      })
+        .then(loadDetails => {
+          let blobs = [];
+          loadDetails.forEach(details => {
+            blobs.push(details);
+          });
+          return blobs[0];
+        })
+        .catch(err => {
+          browser.test.fail(
+            `Error loading the blob from the DB: ${err} :: ${err.stack}`
+          );
+          browser.test.notifyFail("test-completed");
+        });
+    }
+
+    browser.test.log("Blob creation");
+    await save(new Blob([blobContent]));
+    let blob = await load();
+
+    db.close();
+
+    browser.runtime.onMessage.addListener(([msg, what]) => {
+      browser.test.log("Message received from content: " + msg);
+      if (msg == "script-ready") {
+        return Promise.resolve({ blob });
+      }
+
+      if (msg == "script-value") {
+        browser.test.assertEq(blobContent, what, "blob content matches");
+        browser.test.notifyPass("test-completed");
+        return;
+      }
+
+      browser.test.fail(`Unexpected test message received: ${msg}`);
+    });
+
+    browser.test.sendMessage("bg-ready");
+  }
+
+  function contentScriptStart() {
+    browser.runtime.sendMessage(["script-ready"], response => {
+      let reader = new FileReader();
+      reader.addEventListener(
+        "load",
+        () => {
+          browser.runtime.sendMessage(["script-value", reader.result]);
+        },
+        { once: true }
+      );
+      reader.readAsText(response.blob);
+    });
+  }
+
+  let extensionData = {
+    background,
+    manifest: {
+      content_scripts: [
+        {
+          matches: ["http://*/*/file_sample.html"],
+          js: ["content_script_start.js"],
+          run_at: "document_start",
+        },
+      ],
+    },
+    files: {
+      "content_script_start.js": contentScriptStart,
+    },
+  };
+
+  let extension = ExtensionTestUtils.loadExtension(extensionData);
+  await extension.startup();
+
+  await extension.awaitMessage("bg-ready");
+
+  let contentPage = await ExtensionTestUtils.loadContentPage(
+    `${BASE_URL}/file_sample.html`
+  );
+
+  await extension.awaitFinish("test-completed");
+
+  await contentPage.close();
+  await extension.unload();
+});