1 files changed, 115 insertions, 0 deletions
diff --git a/dom/base/test/browser_chromeutils_isdomobject.js b/dom/base/test/browser_chromeutils_isdomobject.js
new file mode 100644
index 0000000000..14a5d69898
--- /dev/null
+++ b/dom/base/test/browser_chromeutils_isdomobject.js
@@ -0,0 +1,115 @@
+"use strict";
+
+add_task(async function invalidArgument() {
+  const args = [undefined, null, 42, "foo"];
+
+  for (const argument of args) {
+    let hadException = false;
+    try {
+      ChromeUtils.isDOMObject(argument);
+    } catch (ex) {
+      hadException = true;
+    }
+    ok(hadException, "Should have got an exception!");
+  }
+});
+
+add_task(async function NoUnwrap() {
+  const args = [
+    window.document,
+    window.document.childNodes,
+    new DocumentFragment(),
+    new Response(),
+    new URL("https://example.com"),
+  ];
+
+  for (const argument of args) {
+    ok(
+      ChromeUtils.isDOMObject(argument, false),
+      `${ChromeUtils.getClassName(
+        argument
+      )} to be a DOM object with unwrap=false`
+    );
+  }
+
+  ok(
+    !ChromeUtils.isDOMObject(window, false),
+    `${ChromeUtils.getClassName(
+      window
+    )} not to be a DOM object with unwrap=false`
+  );
+});
+
+add_task(async function DOMObjects() {
+  const args = [
+    window,
+    window.document,
+    window.document.childNodes,
+    new DocumentFragment(),
+    new Response(),
+    new URL("https://example.com"),
+  ];
+
+  for (const argument of args) {
+    ok(
+      ChromeUtils.isDOMObject(argument),
+      `${ChromeUtils.getClassName(argument)} to be a DOM object`
+    );
+  }
+});
+
+add_task(async function nonDOMObjects() {
+  const args = [new Object(), {}, []];
+
+  for (const argument of args) {
+    ok(
+      !ChromeUtils.isDOMObject(argument),
+      `${ChromeUtils.getClassName(argument)} not to be a DOM object`
+    );
+  }
+});
+
+add_task(async function DOMObjects_contentProcess() {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: `data:text/html,<div>`,
+    },
+    async function (browser) {
+      await SpecialPowers.spawn(browser, [], async () => {
+        const args = [
+          content,
+          content.document,
+          content.document.querySelector("div"),
+          content.document.childNodes,
+          new content.DocumentFragment(),
+          new content.URL("https://example.com"),
+        ];
+
+        for (const argument of args) {
+          ok(
+            ChromeUtils.isDOMObject(argument),
+            `${ChromeUtils.getClassName(
+              argument
+            )} in content to be a DOM object`
+          );
+        }
+
+        ok(
+          !ChromeUtils.isDOMObject({}),
+          `${ChromeUtils.getClassName({})} in content not to be a DOM object`
+        );
+
+        // unwrap=false
+        for (const argument of args) {
+          ok(
+            !ChromeUtils.isDOMObject(argument, false),
+            `${ChromeUtils.getClassName(
+              argument
+            )} in content not to be a DOM object with unwrap=false`
+          );
+        }
+      });
+    }
+  );
+});