1 files changed, 64 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_functiongrips-01.js b/devtools/server/tests/xpcshell/test_functiongrips-01.js
new file mode 100644
index 0000000000..5abce26875
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_functiongrips-01.js
@@ -0,0 +1,64 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(
+  threadFrontTest(async ({ threadFront, debuggee }) => {
+    // Test named function
+    function evalCode() {
+      debuggee.eval(
+        function stopMe(arg1) {
+          debugger;
+        }.toString()
+      );
+      debuggee.eval("stopMe(stopMe)");
+    }
+
+    const packet1 = await executeOnNextTickAndWaitForPause(
+      () => evalCode(),
+      threadFront
+    );
+
+    const args1 = packet1.frame.arguments;
+
+    Assert.equal(args1[0].class, "Function");
+    Assert.equal(args1[0].name, "stopMe");
+    Assert.equal(args1[0].displayName, "stopMe");
+
+    await threadFront.resume();
+
+    // Test inferred name function
+    const packet2 = await executeOnNextTickAndWaitForPause(
+      () =>
+        debuggee.eval(
+          "var o = { m: function(foo, bar, baz) { } }; stopMe(o.m)"
+        ),
+      threadFront
+    );
+
+    const args2 = packet2.frame.arguments;
+
+    Assert.equal(args2[0].class, "Function");
+    // No name for an anonymous function, but it should have an inferred name.
+    Assert.equal(args2[0].name, undefined);
+    Assert.equal(args2[0].displayName, "m");
+
+    await threadFront.resume();
+
+    // Test anonymous function
+    const packet3 = await executeOnNextTickAndWaitForPause(
+      () => debuggee.eval("stopMe(function(foo, bar, baz) { })"),
+      threadFront
+    );
+
+    const args3 = packet3.frame.arguments;
+
+    Assert.equal(args3[0].class, "Function");
+    // No name for an anonymous function, and no inferred name, either.
+    Assert.equal(args3[0].name, undefined);
+    Assert.equal(args3[0].displayName, undefined);
+
+    await threadFront.resume();
+  })
+);