1 files changed, 81 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_stepping-16.js b/devtools/server/tests/xpcshell/test_stepping-16.js
new file mode 100644
index 0000000000..e3bd94b747
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_stepping-16.js
@@ -0,0 +1,81 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Test stepping from inside a blackboxed function
+ * test-page: https://dbg-blackbox-stepping2.glitch.me/
+ */
+
+async function invokeAndPause({ global, threadFront }, expression, url) {
+  return executeOnNextTickAndWaitForPause(
+    () => Cu.evalInSandbox(expression, global, "1.8", url, 1),
+    threadFront
+  );
+}
+
+add_task(
+  threadFrontTest(async ({ commands, threadFront, debuggee }) => {
+    const dbg = { global: debuggee, threadFront };
+    invokeAndPause(
+      dbg,
+      `function outermost() {
+        blackboxed(
+          function inner1() {
+            return 1;
+          },
+          function inner2() {
+            return 2;
+          }
+        );
+      }`,
+      "http://example.com/unblackboxed.js"
+    );
+    invokeAndPause(
+      dbg,
+      `function blackboxed(...args) {
+        for (const arg of args) {
+          arg();
+        }
+      }`,
+      "http://example.com/blackboxed.js"
+    );
+
+    const { sources } = await getSources(threadFront);
+    const blackboxedSourceFront = threadFront.source(
+      sources.find(source => source.url == "http://example.com/blackboxed.js")
+    );
+    const unblackboxedSource = sources.find(
+      source => source.url == "http://example.com/unblackboxed.js"
+    );
+    const unblackboxedActor = unblackboxedSource.actor;
+    const unblackboxedSourceFront = threadFront.source(unblackboxedSource);
+
+    await setBreakpoint(threadFront, {
+      sourceUrl: unblackboxedSourceFront.url,
+      line: 4,
+    });
+    blackBox(blackboxedSourceFront);
+
+    async function testStepping(action, expectedLine) {
+      commands.scriptCommand.execute("outermost()");
+      await waitForPause(threadFront);
+      await stepOver(threadFront);
+      const packet = await action(threadFront);
+      const { actor, line } = packet.frame.where;
+      equal(actor, unblackboxedActor, "Paused in unblackboxed source");
+      equal(line, expectedLine, "Paused at correct line");
+      await threadFront.resume();
+    }
+
+    info("Step Out to outermost");
+    await testStepping(stepOut, 10);
+
+    info("Step Over to outermost");
+    await testStepping(stepOver, 10);
+
+    info("Step In to inner2");
+    await testStepping(stepIn, 7);
+  })
+);