v8/test/mjsunit/debug-stepin-builtin-callback.js

158 lines
4.4 KiB
JavaScript
Raw Normal View History

// Copyright 2012 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --expose-debug-as debug
// Test stepping into callbacks passed to builtin functions.
Debug = debug.Debug
var exception = false;
function array_listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Break) {
if (breaks == 0) {
exec_state.prepareStep(Debug.StepAction.StepIn, 2);
breaks = 1;
} else if (breaks <= 3) {
breaks++;
// Check whether we break at the expected line.
print(event_data.sourceLineText());
assertTrue(event_data.sourceLineText().indexOf("Expected to step") > 0);
exec_state.prepareStep(Debug.StepAction.StepIn, 3);
}
}
} catch (e) {
exception = true;
}
};
function cb_false(num) {
print("element " + num); // Expected to step to this point.
return false;
}
function cb_true(num) {
print("element " + num); // Expected to step to this point.
return true;
}
function cb_reduce(a, b) {
print("elements " + a + " and " + b); // Expected to step to this point.
return a + b;
}
var a = [1, 2, 3, 4];
Debug.setListener(array_listener);
var breaks = 0;
debugger;
a.forEach(cb_true);
assertFalse(exception);
assertEquals(4, breaks);
breaks = 0;
debugger;
a.some(cb_false);
assertFalse(exception);
assertEquals(4, breaks);
breaks = 0;
debugger;
a.every(cb_true);
assertEquals(4, breaks);
assertFalse(exception);
breaks = 0;
debugger;
a.map(cb_true);
assertFalse(exception);
assertEquals(4, breaks);
breaks = 0;
debugger;
a.filter(cb_true);
assertFalse(exception);
assertEquals(4, breaks);
breaks = 0;
debugger;
a.reduce(cb_reduce);
assertFalse(exception);
assertEquals(4, breaks);
breaks = 0;
debugger;
a.reduceRight(cb_reduce);
assertFalse(exception);
assertEquals(4, breaks);
Debug.setListener(null);
// Test two levels of builtin callbacks:
// Array.forEach calls a callback function, which by itself uses
// Array.forEach with another callback function.
function second_level_listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Break) {
if (breaks == 0) {
exec_state.prepareStep(Debug.StepAction.StepIn, 3);
breaks = 1;
} else if (breaks <= 16) {
breaks++;
// Check whether we break at the expected line.
assertTrue(event_data.sourceLineText().indexOf("Expected to step") > 0);
// Step two steps further every four breaks to skip the
// forEach call in the first level of recurision.
var step = (breaks % 4 == 1) ? 6 : 3;
exec_state.prepareStep(Debug.StepAction.StepIn, step);
}
}
} catch (e) {
exception = true;
}
};
function cb_foreach(num) {
a.forEach(cb_true);
print("back to the first level of recursion.");
}
Debug.setListener(second_level_listener);
breaks = 0;
debugger;
a.forEach(cb_foreach);
assertFalse(exception);
assertEquals(17, breaks);
Debug.setListener(null);