1 files changed, 73 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-navigation.js b/devtools/client/debugger/test/mochitest/browser_dbg-navigation.js
new file mode 100644
index 0000000000..6cf5c0ec5f
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-navigation.js
@@ -0,0 +1,73 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+"use strict";
+
+const SOURCES = [
+  "simple1.js",
+  "simple2.js",
+  "simple3.js",
+  "long.js",
+  "doc-scripts.html",
+];
+
+/**
+ * Test navigating
+ * navigating while paused will reset the pause state and sources
+ */
+add_task(async function () {
+  const dbg = await initDebugger("doc-script-switching.html");
+  const {
+    selectors: { getSelectedSource, getIsPaused, getCurrentThread },
+  } = dbg;
+  ok(getCurrentThread(), "We get a thread selected on debugger opening");
+
+  info("Pause in the first document");
+  invokeInTab("firstCall");
+  await waitForPaused(dbg);
+
+  info("Navigate while being paused in the first document");
+  await navigate(dbg, "doc-scripts.html", "simple1.js");
+  ok(
+    getCurrentThread(),
+    "The new top level thread is selected after navigation"
+  );
+
+  info("Set a breakpoint on the second document and pause on it");
+  await selectSource(dbg, "simple1.js");
+  await addBreakpoint(dbg, "simple1.js", 4);
+  invokeInTab("main");
+  await waitForPaused(dbg);
+  const source = findSource(dbg, "simple1.js");
+  assertPausedAtSourceAndLine(dbg, source.id, 4);
+  is(countSources(dbg), 5, "5 sources are loaded.");
+
+  await waitForRequestsToSettle(dbg);
+  let onBreakpoint = waitForDispatch(dbg.store, "SET_BREAKPOINT");
+  await navigate(dbg, "doc-scripts.html", ...SOURCES);
+  await onBreakpoint;
+  is(countSources(dbg), 5, "5 sources are loaded.");
+  ok(!getIsPaused(getCurrentThread()), "Is not paused");
+
+  await waitForRequestsToSettle(dbg);
+  onBreakpoint = waitForDispatch(dbg.store, "SET_BREAKPOINT");
+  await navigate(dbg, "doc-scripts.html", ...SOURCES);
+  await onBreakpoint;
+  is(countSources(dbg), 5, "5 sources are loaded.");
+
+  info("Test that the current selected source persists across reloads");
+  await selectSource(dbg, "long.js");
+
+  await waitForRequestsToSettle(dbg);
+  onBreakpoint = waitForDispatch(dbg.store, "SET_BREAKPOINT");
+  await reload(dbg, "long.js");
+  await onBreakpoint;
+  await waitForSelectedSource(dbg, "long.js");
+
+  ok(getSelectedSource().url.includes("long.js"), "Selected source is long.js");
+});
+
+function countSources(dbg) {
+  return dbg.selectors.getSourceCount();
+}