1 files changed, 51 insertions, 0 deletions
diff --git a/devtools/shared/commands/script/tests/head.js b/devtools/shared/commands/script/tests/head.js
new file mode 100644
index 0000000000..50635e4502
--- /dev/null
+++ b/devtools/shared/commands/script/tests/head.js
@@ -0,0 +1,51 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/devtools/client/shared/test/shared-head.js",
+  this
+);
+
+function checkObject(object, expected, message) {
+  if (object && object.getGrip) {
+    object = object.getGrip();
+  }
+
+  for (const name of Object.keys(expected)) {
+    const expectedValue = expected[name];
+    const value = object[name];
+    checkValue(name, value, expectedValue, message);
+  }
+}
+
+function checkValue(name, value, expected, message) {
+  if (message) {
+    message = ` for '${message}'`;
+  }
+
+  if (expected === null) {
+    is(value, null, `'${name}' is null${message}`);
+  } else if (expected === undefined) {
+    is(value, expected, `'${name}' is undefined${message}`);
+  } else if (
+    typeof expected == "string" ||
+    typeof expected == "number" ||
+    typeof expected == "boolean"
+  ) {
+    is(value, expected, "property '" + name + "'" + message);
+  } else if (expected instanceof RegExp) {
+    ok(
+      expected.test(value),
+      name + ": " + expected + " matched " + value + message
+    );
+  } else if (Array.isArray(expected)) {
+    info("checking array for property '" + name + "'" + message);
+    checkObject(value, expected, message);
+  } else if (typeof expected == "object") {
+    info("checking object for property '" + name + "'" + message);
+    checkObject(value, expected, message);
+  }
+}