1 files changed, 117 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_objectgrips-fn-apply-01.js b/devtools/server/tests/xpcshell/test_objectgrips-fn-apply-01.js
new file mode 100644
index 0000000000..f576f16a5e
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_objectgrips-fn-apply-01.js
@@ -0,0 +1,117 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+Services.prefs.setBoolPref("security.allow_eval_with_system_principal", true);
+registerCleanupFunction(() => {
+  Services.prefs.clearUserPref("security.allow_eval_with_system_principal");
+});
+
+add_task(
+  threadFrontTest(async ({ threadFront, debuggee }) => {
+    const packet = await executeOnNextTickAndWaitForPause(
+      () => evalCode(debuggee),
+      threadFront
+    );
+
+    const arg1 = packet.frame.arguments[0];
+    Assert.equal(arg1.class, "Object");
+
+    const objectFront = threadFront.pauseGrip(arg1);
+
+    const obj1 = (
+      await objectFront.getPropertyValue("obj1", null)
+    ).value.return.getGrip();
+    const obj2 = (
+      await objectFront.getPropertyValue("obj2", null)
+    ).value.return.getGrip();
+
+    info(`Retrieve "context" function reference`);
+    const context = (await objectFront.getPropertyValue("context", null)).value
+      .return;
+    info(`Retrieve "sum" function reference`);
+    const sum = (await objectFront.getPropertyValue("sum", null)).value.return;
+    info(`Retrieve "error" function reference`);
+    const error = (await objectFront.getPropertyValue("error", null)).value
+      .return;
+
+    assert_response(await context.apply(obj1, [obj1]), {
+      return: "correct context",
+    });
+    assert_response(await context.apply(obj2, [obj2]), {
+      return: "correct context",
+    });
+    assert_response(await context.apply(obj1, [obj2]), {
+      return: "wrong context",
+    });
+    assert_response(await context.apply(obj2, [obj1]), {
+      return: "wrong context",
+    });
+    // eslint-disable-next-line no-useless-call
+    assert_response(await sum.apply(null, [1, 2, 3, 4, 5, 6, 7]), {
+      return: 1 + 2 + 3 + 4 + 5 + 6 + 7,
+    });
+    // eslint-disable-next-line no-useless-call
+    assert_response(await error.apply(null, []), {
+      throw: "an error",
+    });
+
+    await threadFront.resume();
+  })
+);
+
+function evalCode(debuggee) {
+  debuggee.eval(
+    function stopMe(arg1) {
+      debugger;
+    }.toString()
+  );
+
+  debuggee.eval(`
+    stopMe({
+      obj1: {},
+      obj2: {},
+      context(arg) {
+        return this === arg ? "correct context" : "wrong context";
+      },
+      sum(...parts) {
+        return parts.reduce((acc, v) => acc + v, 0);
+      },
+      error() {
+        throw "an error";
+      },
+    });
+  `);
+}
+
+function assert_response({ value }, expected) {
+  assert_completion(value, expected);
+}
+
+function assert_completion(value, expected) {
+  if (expected && "return" in expected) {
+    assert_value(value.return, expected.return);
+  }
+  if (expected && "throw" in expected) {
+    assert_value(value.throw, expected.throw);
+  }
+  if (!expected) {
+    assert_value(value, expected);
+  }
+}
+
+function assert_value(actual, expected) {
+  Assert.equal(typeof actual, typeof expected);
+
+  if (typeof expected === "object") {
+    // Note: We aren't using deepEqual here because we're only doing a cursory
+    // check of a few properties, not a full comparison of the result, since
+    // the full outputs includes stuff like preview info that we don't need.
+    for (const key of Object.keys(expected)) {
+      assert_value(actual[key], expected[key]);
+    }
+  } else {
+    Assert.equal(actual, expected);
+  }
+}