[debugger] Various break-related functionality in test wrapper

test/debugger/debugger/debug-step-2.js

Index: test/debugger/debugger/debug-step-2.js
diff --git a/test/debugger/debugger/debug-step-2.js b/test/debugger/debugger/debug-step-2.js
new file mode 100644
index 0000000000000000000000000000000000000000..e47816a4d5a33c2140bff2d54350f02b83f74487
--- /dev/null
+++ b/test/debugger/debugger/debug-step-2.js
@@ -0,0 +1,61 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+const Debug = new DebugWrapper();
+Debug.enable();
+
+// This test tests that full code compiled without debug break slots
+// is recompiled with debug break slots when debugging is started.
+
+var bp;
+var done = false;
+var step_count = 0;
+
+// Debug event listener which steps until the global variable done is true.
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.Break) {
+    if (!done) Debug.stepOver();
+    step_count++;
+  }
+};
+
+// Set the global variables state to prpare the stepping test.
+function prepare_step_test() {
+  done = false;
+  step_count = 0;
+}
+
+// Test function to step through.
+function f() {
+  var i = 1;
+  var j = 2;
+  done = true;
+};
+
+prepare_step_test();
+f();
+
+// Add the debug event listener.
+Debug.setListener(listener);
+
+bp = Debug.setBreakPoint(f, 1);
+
+prepare_step_test();
+f();
+assertEquals(4, step_count);
+Debug.clearBreakPoint(bp);
+
+// Set a breakpoint on the first var statement (line 1).
+bp = Debug.setBreakPoint(f, 1);
+
+// Step through the function ensuring that the var statements are hit as well.
+prepare_step_test();
+f();
+assertEquals(4, step_count);
+
+// Clear the breakpoint and check that no stepping happens.
+Debug.clearBreakPoint(bp);
+prepare_step_test();
+f();
+assertEquals(0, step_count);