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Unified Diff: test/mjsunit/debug-stepin-foreach.js

Issue 739523002: Allow stepping into Object.observe handlers. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 6 years, 1 month ago
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Index: test/mjsunit/debug-stepin-foreach.js
diff --git a/test/mjsunit/debug-stepin-foreach.js b/test/mjsunit/debug-stepin-foreach.js
new file mode 100644
index 0000000000000000000000000000000000000000..fa728e019c11ed204a6a751e925598d3eab30ea4
--- /dev/null
+++ b/test/mjsunit/debug-stepin-foreach.js
@@ -0,0 +1,51 @@
+// Copyright 2014 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.
+
+// Flags: --expose-debug-as debug
+// Tests stepping into through Array.prototype.forEach callbacks.
+
+Debug = debug.Debug
+var exception = null;
+var break_count = 0;
+var expected_breaks = -1;
+
+function listener(event, exec_state, event_data, data) {
+ try {
+ if (event == Debug.DebugEvent.Break) {
+ assertTrue(exec_state.frameCount() != 0, "FAIL: Empty stack trace");
+ if (!break_count) {
+ // Count number of expected breakpoints in this source file.
+ var source_text = exec_state.frame(0).func().script().source();
+ expected_breaks = source_text.match(/\/\/\s*Break\s+\d+\./g).length;
+ print("Expected breaks: " + expected_breaks);
+ }
+ var source = exec_state.frame(0).sourceLineText();
+ print("paused at: " + source);
+ assertTrue(source.indexOf("// Break " + break_count + ".") > 0,
+ "Unexpected pause at: " + source + "\n" +
+ "Expected: // Break " + break_count + ".");
+ ++break_count;
+ if (break_count !== expected_breaks) {
+ exec_state.prepareStep(Debug.StepAction.StepIn, 1);
+ }
+ }
+ } catch(e) {
+ exception = e;
+ print(e, e.stack);
+ }
+};
+
+Debug.setListener(listener);
+
+debugger; // Break 0.
+[1,2].forEach(callback); // Break 1.
+
+function callback(x) {
+ return x; // Break 2. // Break 4.
+} // Break 3. // Break 5.
+
+assertNull(exception); // Break 6.
+assertEquals(expected_breaks, break_count);
+
+Debug.setListener(null);
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