1 files changed, 139 insertions, 0 deletions
diff --git a/dom/promise/tests/unit/test_promise_unhandled_rejection.js b/dom/promise/tests/unit/test_promise_unhandled_rejection.js
new file mode 100644
index 0000000000..68471569ec
--- /dev/null
+++ b/dom/promise/tests/unit/test_promise_unhandled_rejection.js
@@ -0,0 +1,139 @@
+"use strict";
+
+// Tests that unhandled promise rejections generate the appropriate
+// console messages.
+
+const { AddonTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/AddonTestUtils.sys.mjs"
+);
+const { PromiseTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/PromiseTestUtils.sys.mjs"
+);
+
+PromiseTestUtils.expectUncaughtRejection(/could not be cloned/);
+PromiseTestUtils.expectUncaughtRejection(/An exception was thrown/);
+PromiseTestUtils.expectUncaughtRejection(/Bleah/);
+
+const filename = "resource://foo/Bar.jsm";
+
+async function getSandboxMessages(sandbox, code) {
+  let { messages } = await AddonTestUtils.promiseConsoleOutput(async () => {
+    Cu.evalInSandbox(code, sandbox, null, filename, 1);
+
+    // We need two trips through the event loop for this error to be reported.
+    await new Promise(executeSoon);
+    await new Promise(executeSoon);
+  });
+
+  // xpcshell tests on OS-X sometimes include an extra warning, which we
+  // unfortunately need to ignore:
+  return messages.filter(
+    msg =>
+      !msg.message.includes(
+        "No chrome package registered for chrome://branding/locale/brand.properties"
+      )
+  );
+}
+
+add_task(async function test_unhandled_dom_exception() {
+  let sandbox = Cu.Sandbox(Services.scriptSecurityManager.getSystemPrincipal());
+  sandbox.StructuredCloneHolder = StructuredCloneHolder;
+
+  let messages = await getSandboxMessages(
+    sandbox,
+    `new Promise(() => {
+      new StructuredCloneHolder("", "", () => {});
+    });`
+  );
+
+  equal(messages.length, 1, "Got one console message");
+
+  let [msg] = messages;
+  ok(msg instanceof Ci.nsIScriptError, "Message is a script error");
+  equal(msg.sourceName, filename, "Got expected filename");
+  equal(msg.lineNumber, 2, "Got expected line number");
+  equal(
+    msg.errorMessage,
+    "DataCloneError: Function object could not be cloned.",
+    "Got expected error message"
+  );
+});
+
+add_task(async function test_unhandled_dom_exception_wrapped() {
+  let sandbox = Cu.Sandbox(
+    Services.scriptSecurityManager.createContentPrincipalFromOrigin(
+      "http://example.com/"
+    )
+  );
+  Cu.exportFunction(
+    function frick() {
+      throw new Components.Exception(
+        "Bleah.",
+        Cr.NS_ERROR_FAILURE,
+        Components.stack.caller
+      );
+    },
+    sandbox,
+    { defineAs: "frick" }
+  );
+
+  let messages = await getSandboxMessages(
+    sandbox,
+    `new Promise(() => {
+      frick();
+    });`
+  );
+
+  equal(messages.length, 2, "Got two console messages");
+
+  let [msg1, msg2] = messages;
+  ok(msg1 instanceof Ci.nsIScriptError, "Message is a script error");
+  equal(msg1.sourceName, filename, "Got expected filename");
+  equal(msg1.lineNumber, 2, "Got expected line number");
+  equal(
+    msg1.errorMessage,
+    "NS_ERROR_FAILURE: Bleah.",
+    "Got expected error message"
+  );
+
+  ok(msg2 instanceof Ci.nsIScriptError, "Message is a script error");
+  equal(msg2.sourceName, filename, "Got expected filename");
+  equal(msg2.lineNumber, 2, "Got expected line number");
+  equal(
+    msg2.errorMessage,
+    "InvalidStateError: An exception was thrown",
+    "Got expected error message"
+  );
+});
+
+add_task(async function test_unhandled_dom_exception_from_sandbox() {
+  let sandbox = Cu.Sandbox(
+    Services.scriptSecurityManager.createContentPrincipalFromOrigin(
+      "http://example.com/"
+    ),
+    { wantGlobalProperties: ["DOMException"] }
+  );
+  let ctor = Cu.evalInSandbox("DOMException", sandbox);
+  Cu.exportFunction(
+    function frick() {
+      throw new ctor("Bleah.");
+    },
+    sandbox,
+    { defineAs: "frick" }
+  );
+
+  let messages = await getSandboxMessages(
+    sandbox,
+    `new Promise(() => {
+      frick();
+    });`
+  );
+
+  equal(messages.length, 1, "Got one console messages");
+
+  let [msg] = messages;
+  ok(msg instanceof Ci.nsIScriptError, "Message is a script error");
+  equal(msg.sourceName, filename, "Got expected filename");
+  equal(msg.lineNumber, 2, "Got expected line number");
+  equal(msg.errorMessage, "Error: Bleah.", "Got expected error message");
+});