1 files changed, 79 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_stepping-15.js b/devtools/server/tests/xpcshell/test_stepping-15.js
new file mode 100644
index 0000000000..6981758b8f
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_stepping-15.js
@@ -0,0 +1,79 @@
+/* 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-stepping.glitch.me/
+ */
+
+async function invokeAndPause({ global, threadFront }, expression, url) {
+  return executeOnNextTickAndWaitForPause(
+    () => Cu.evalInSandbox(expression, global, "1.8", url, 1),
+    threadFront
+  );
+}
+add_task(
+  threadFrontTest(async ({ threadFront, targetFront, debuggee }) => {
+    const consoleFront = await targetFront.getFront("console");
+    const dbg = { global: debuggee, threadFront };
+
+    // Test stepping from a blackboxed location
+    async function testStepping(action, expectedLine) {
+      consoleFront.evaluateJSAsync(`outermost()`);
+      await waitForPause(threadFront);
+      await blackBox(blackboxedSourceFront);
+      const packet = await action(threadFront);
+      const { line, actor } = packet.frame.where;
+      equal(actor, unblackboxedActor, "paused in unblackboxed source");
+      equal(line, expectedLine, "paused at correct line");
+      await threadFront.resume();
+      await unBlackBox(blackboxedSourceFront);
+    }
+
+    invokeAndPause(
+      dbg,
+      `function outermost() {
+        const value = blackboxed1();
+        return value + 1;
+      }
+      function innermost() {
+        return 1;
+      }`,
+      "http://example.com/unblackboxed.js"
+    );
+    invokeAndPause(
+      dbg,
+      `function blackboxed1() {
+        return blackboxed2();
+      }
+      function blackboxed2() {
+        return innermost();
+      }`,
+      "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 unblackboxedActor = sources.find(
+      source => source.url == "http://example.com/unblackboxed.js"
+    ).actor;
+
+    await setBreakpoint(threadFront, {
+      sourceUrl: blackboxedSourceFront.url,
+      line: 5,
+    });
+
+    info("Step Out to outermost");
+    await testStepping(stepOut, 3);
+
+    info("Step Over to outermost");
+    await testStepping(stepOver, 3);
+
+    info("Step In to innermost");
+    await testStepping(stepIn, 6);
+  })
+);