1 files changed, 90 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_xpcshell_debugging.js b/devtools/server/tests/xpcshell/test_xpcshell_debugging.js
new file mode 100644
index 0000000000..ff54d7390d
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_xpcshell_debugging.js
@@ -0,0 +1,90 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test the xpcshell-test debug support.  Ideally we should have this test
+// next to the xpcshell support code, but that's tricky...
+
+// HACK: ServiceWorkerManager requires the "profile-change-teardown" to cleanly
+// shutdown, and setting _profileInitialized to `true` will trigger those
+// notifications (see /testing/xpcshell/head.js).
+// eslint-disable-next-line no-undef
+_profileInitialized = true;
+
+add_task(async function () {
+  const testFile = do_get_file("xpcshell_debugging_script.js");
+
+  // _setupDevToolsServer is from xpcshell-test's head.js
+  /* global _setupDevToolsServer */
+  let testInitialized = false;
+  const { DevToolsServer } = _setupDevToolsServer([testFile.path], () => {
+    testInitialized = true;
+  });
+  const transport = DevToolsServer.connectPipe();
+  const client = new DevToolsClient(transport);
+  await client.connect();
+
+  // Ensure that global actors are available. Just test the device actor.
+  const deviceFront = await client.mainRoot.getFront("device");
+  const desc = await deviceFront.getDescription();
+  equal(
+    desc.geckobuildid,
+    Services.appinfo.platformBuildID,
+    "device actor works"
+  );
+
+  // Even though we have no tabs, getMainProcess gives us the chrome debugger.
+  const targetDescriptor = await client.mainRoot.getMainProcess();
+  const front = await targetDescriptor.getTarget();
+  const watcher = await targetDescriptor.getWatcher();
+
+  const threadFront = await front.attachThread();
+
+  // Checks that the thread actor initializes immediately and that _setupDevToolsServer
+  // callback gets called.
+  ok(testInitialized);
+
+  const onPause = waitForPause(threadFront);
+
+  // Now load our test script,
+  // in another event loop so that the test can keep running!
+  Services.tm.dispatchToMainThread(() => {
+    load(testFile.path);
+  });
+
+  // and our "paused" listener should get hit.
+  info("Wait for first paused event");
+  const packet1 = await onPause;
+  equal(
+    packet1.why.type,
+    "breakpoint",
+    "yay - hit the breakpoint at the first line in our script"
+  );
+
+  // Resume again - next stop should be our "debugger" statement.
+  info("Wait for second pause event");
+  const packet2 = await resumeAndWaitForPause(threadFront);
+  equal(
+    packet2.why.type,
+    "debuggerStatement",
+    "yay - hit the 'debugger' statement in our script"
+  );
+
+  info("Dynamically add a breakpoint after the debugger statement");
+  const breakpointsFront = await watcher.getBreakpointListActor();
+  await breakpointsFront.setBreakpoint(
+    { sourceUrl: testFile.path, line: 11, column: 0 },
+    {}
+  );
+
+  // Resume again - next stop should be the new breakpoint.
+  info("Wait for third pause event");
+  const packet3 = await resumeAndWaitForPause(threadFront);
+  equal(
+    packet3.why.type,
+    "breakpoint",
+    "yay - hit the breakpoint added after starting the test"
+  );
+  finishClient(client);
+});