1 files changed, 96 insertions, 0 deletions
diff --git a/devtools/server/tests/unit/test_breakpoint-03.js b/devtools/server/tests/unit/test_breakpoint-03.js
new file mode 100644
index 000000000..b1792866b
--- /dev/null
+++ b/devtools/server/tests/unit/test_breakpoint-03.js
@@ -0,0 +1,96 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Check that setting a breakpoint on a line without code will skip
+ * forward when we know the script isn't GCed (the debugger is connected,
+ * so it's kept alive).
+ */
+
+var gDebuggee;
+var gClient;
+var gThreadClient;
+var gCallback;
+
+function run_test()
+{
+  run_test_with_server(DebuggerServer, function () {
+    run_test_with_server(WorkerDebuggerServer, do_test_finished);
+  });
+  do_test_pending();
+}
+
+function run_test_with_server(aServer, aCallback)
+{
+  gCallback = aCallback;
+  initTestDebuggerServer(aServer);
+  gDebuggee = addTestGlobal("test-stack", aServer);
+  gClient = new DebuggerClient(aServer.connectPipe());
+  gClient.connect().then(function () {
+    attachTestTabAndResume(gClient,
+                           "test-stack",
+                           function (aResponse, aTabClient, aThreadClient) {
+                             gThreadClient = aThreadClient;
+                             test_skip_breakpoint();
+                           });
+  });
+}
+
+var test_no_skip_breakpoint = Task.async(function*(source, location) {
+  let [aResponse, bpClient] = yield source.setBreakpoint(
+    Object.assign({}, location, { noSliding: true })
+  );
+
+  do_check_true(!aResponse.actualLocation);
+  do_check_eq(bpClient.location.line, gDebuggee.line0 + 3);
+  yield bpClient.remove();
+});
+
+var test_skip_breakpoint = function() {
+  gThreadClient.addOneTimeListener("paused", Task.async(function *(aEvent, aPacket) {
+    let location = { line: gDebuggee.line0 + 3 };
+    let source = gThreadClient.source(aPacket.frame.where.source);
+
+    // First, make sure that we can disable sliding with the
+    // `noSliding` option.
+    yield test_no_skip_breakpoint(source, location);
+
+    // Now make sure that the breakpoint properly slides forward one line.
+    const [aResponse, bpClient] = yield source.setBreakpoint(location);
+    do_check_true(!!aResponse.actualLocation);
+    do_check_eq(aResponse.actualLocation.source.actor, source.actor);
+    do_check_eq(aResponse.actualLocation.line, location.line + 1);
+
+    gThreadClient.addOneTimeListener("paused", function (aEvent, aPacket) {
+      // Check the return value.
+      do_check_eq(aPacket.type, "paused");
+      do_check_eq(aPacket.frame.where.source.actor, source.actor);
+      do_check_eq(aPacket.frame.where.line, location.line + 1);
+      do_check_eq(aPacket.why.type, "breakpoint");
+      do_check_eq(aPacket.why.actors[0], bpClient.actor);
+      // Check that the breakpoint worked.
+      do_check_eq(gDebuggee.a, 1);
+      do_check_eq(gDebuggee.b, undefined);
+
+      // Remove the breakpoint.
+      bpClient.remove(function (aResponse) {
+        gThreadClient.resume(function () {
+          gClient.close().then(gCallback);
+        });
+      });
+    });
+
+    gThreadClient.resume();
+  }));
+
+  // Use `evalInSandbox` to make the debugger treat it as normal
+  // globally-scoped code, where breakpoint sliding rules apply.
+  Cu.evalInSandbox(
+    "var line0 = Error().lineNumber;\n" +
+    "debugger;\n" +      // line0 + 1
+    "var a = 1;\n" +     // line0 + 2
+    "// A comment.\n" +  // line0 + 3
+    "var b = 2;",        // line0 + 4
+    gDebuggee
+  );
+}