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<html>
<head>
<title>Heap Profiler: heap snapshots comparison test</title>
<script type="text/javascript">
var aHolder = [], bHolder = [], cHolder = [], dHolder = [];
function A(x) {
this.x = x;
}
function B(x) {
this.x = x;
}
function C() {}
var i;
for (i = 0; i < 100; ++i) {
var b = new B('hello');
bHolder.push(b);
aHolder.push(new A(b));
b = null;
}
for (i = 0; i < 25; ++i) {
cHolder.push(new C());
}
function D() {}
function changeStuff() {
if (aHolder.length > 0) {
aHolder.splice(aHolder.length - 25, 25);
}
for (i = 0; i < 25; ++i) {
bHolder.push(new B('hello'));
}
cHolder = [];
for (i = 0; i < 25; ++i) {
dHolder.push(new D());
}
}
</script>
</head>
<body>
This is the test for heap snapshot comparison functionality.
<br>
<br>
To use this test:
<ul>
<li>load file in the browser;
<li>open DevTools (Ctrl+Shift+I on Win/Linux, Command+Option+I on Mac);
<li>go to 'Profiles' page;
<li>press 'Take heap snapshot' button
(eye icon on the left side of the status bar);
<li>press
<input type="button" name="changeStuff" value="this button" onclick="changeStuff()" />;
<li>press 'Take heap snapshot' button again;
</ul>
<br>
On the left pane under 'Heap snapshots' section, items called
'Snapshot 1' and 'Snapshot 2' must appear. Select 'Snapshot 2'.
Ensure that absolute values are shown (not percents).
<br>
<br>
TEST 1. Verify the following:
<ul>
<li>the value in '+/- Count' column for 'A' must be '-25';
<li>after expanding 'A' item, the value in '+/- Count' column
for 'Array' child entry must also be '-25';
<li>the value in '+/- Count' column for 'B' must be '+25';
<li>after expanding 'B' item, the value in '+/- Count' column
for 'Array' child entry must also be '+25'; the value for 'A'
child must be '-25';
</ul>
<br>
TEST 2. Change display to percent view (using the percent button on the
status bar). Verify the following:
<ul>
<li>values in '+/- Count' and '+/- Size' columns for 'C' must be 'deleted';
<li>values in '+/- Count' and '+/- Size' columns for 'D' must be 'new';
</ul>
</body>
</html>
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