1 files changed, 97 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-pause-points.js b/devtools/client/debugger/test/mochitest/browser_dbg-pause-points.js
new file mode 100644
index 0000000000..4ebfe08f15
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-pause-points.js
@@ -0,0 +1,97 @@
+/* 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";
+
+requestLongerTimeout(2);
+
+async function testCase(dbg, { name, steps }) {
+  info(` ### Execute testCase "${name}"`);
+
+  const {
+    selectors: { getTopFrame, getCurrentThread },
+  } = dbg;
+  const locations = [];
+
+  const recordFrame = state => {
+    const { line, column } = getTopFrame(getCurrentThread()).location;
+    locations.push([line, column]);
+    info(`Break on ${line}:${column}`);
+  };
+
+  info("Trigger the expected debugger statement");
+  const onPaused = waitForPaused(dbg);
+  invokeInTab(name);
+  await onPaused;
+  recordFrame();
+
+  info("Start stepping over");
+  for (let i = 0; i < steps.length - 1; i++) {
+    await dbg.actions.stepOver(getThreadContext(dbg));
+    await waitForPaused(dbg);
+    recordFrame();
+  }
+
+  is(formatSteps(locations), formatSteps(steps), name);
+
+  await resume(dbg);
+}
+
+add_task(async function test() {
+  const dbg = await initDebugger("doc-pause-points.html", "pause-points.js");
+
+  await selectSource(dbg, "pause-points.js");
+  await testCase(dbg, {
+    name: "statements",
+    steps: [
+      [9, 2],
+      [10, 4],
+      [10, 13],
+      [11, 2],
+      [11, 21],
+      [12, 2],
+      [12, 12],
+      [13, 0],
+    ],
+  });
+
+  await testCase(dbg, {
+    name: "expressions",
+    steps: [
+      [40, 2],
+      [41, 2],
+      [42, 12],
+      [43, 0],
+    ],
+  });
+
+  await testCase(dbg, {
+    name: "sequences",
+    steps: [
+      [23, 2],
+      [25, 12],
+      [29, 12],
+      [34, 2],
+      [37, 0],
+    ],
+  });
+
+  await testCase(dbg, {
+    name: "flow",
+    steps: [
+      [16, 2],
+      [17, 12],
+      [18, 10],
+      [19, 8],
+      [19, 17],
+      [19, 8],
+      [19, 17],
+      [19, 8],
+    ],
+  });
+});
+
+function formatSteps(steps) {
+  return steps.map(loc => `(${loc.join(",")})`).join(", ");
+}