<!doctype html>
<html>
<head>
<script src="../../resources/js-test-pre.js"></script>
<style>
testcase {
    background-color: rgb(1, 2, 3);
}
testcase:not(:empty) {
    background-color: white;
}
</style>
</head>
<body>
    <div>
        <testcase id="with-renderer"></testcase>
    </div>
    <div style="display:none;">
        <testcase id="without-renderer"></testcase>
    </div>
</body>
<script>
description('Test the style update with the :empty pseudo class.');

var testCaseWithRender = document.getElementById("with-renderer");
var testCaseWithoutRenderer = document.getElementById("without-renderer");

debug("Initial state is empty.");
shouldBeEqualToString('getComputedStyle(document.getElementById("with-renderer")).backgroundColor', 'rgb(1, 2, 3)');
shouldBeEqualToString('getComputedStyle(document.getElementById("without-renderer")).backgroundColor', 'rgb(1, 2, 3)');

debug("Adding a comment does not change the :empty state.");
testCaseWithRender.appendChild(document.createComment("WebKit!"));
testCaseWithoutRenderer.appendChild(document.createComment("WebKit!"));
shouldBeEqualToString('getComputedStyle(document.getElementById("with-renderer")).backgroundColor', 'rgb(1, 2, 3)');
shouldBeEqualToString('getComputedStyle(document.getElementById("without-renderer")).backgroundColor', 'rgb(1, 2, 3)');

debug("Add an element as child make updates :empty.");
var elementForCaseWithRenderer = document.createElement('div');
var elementForCaseWithoutRenderer = document.createElement('div');
testCaseWithRender.appendChild(elementForCaseWithRenderer);
testCaseWithoutRenderer.appendChild(elementForCaseWithoutRenderer);
shouldBeEqualToString('getComputedStyle(document.getElementById("with-renderer")).backgroundColor', 'rgb(255, 255, 255)');
shouldBeEqualToString('getComputedStyle(document.getElementById("without-renderer")).backgroundColor', 'rgb(255, 255, 255)');

debug("Adding an empty text node, this is still not empty because of the element.");
testCaseWithRender.appendChild(document.createTextNode(''));
testCaseWithoutRenderer.appendChild(document.createTextNode(''));
shouldBeEqualToString('getComputedStyle(document.getElementById("with-renderer")).backgroundColor', 'rgb(255, 255, 255)');
shouldBeEqualToString('getComputedStyle(document.getElementById("without-renderer")).backgroundColor', 'rgb(255, 255, 255)');

debug("Removing the elements previously added should restore the :empty state.");
testCaseWithRender.removeChild(elementForCaseWithRenderer);
testCaseWithoutRenderer.removeChild(elementForCaseWithoutRenderer);
shouldBeEqualToString('getComputedStyle(document.getElementById("with-renderer")).backgroundColor', 'rgb(1, 2, 3)');
shouldBeEqualToString('getComputedStyle(document.getElementById("without-renderer")).backgroundColor', 'rgb(1, 2, 3)');

debug("Adding a non empty text node makes the state non empty.");
testCaseWithRender.appendChild(document.createTextNode('WebKit!'));
testCaseWithoutRenderer.appendChild(document.createTextNode('WebKit!'));
shouldBeEqualToString('getComputedStyle(document.getElementById("with-renderer")).backgroundColor', 'rgb(255, 255, 255)');
shouldBeEqualToString('getComputedStyle(document.getElementById("without-renderer")).backgroundColor', 'rgb(255, 255, 255)');

debug("Removing the last text child, back to being empty.");
testCaseWithRender.removeChild(testCaseWithRender.lastChild);
testCaseWithoutRenderer.removeChild(testCaseWithoutRenderer.lastChild);
shouldBeEqualToString('getComputedStyle(document.getElementById("with-renderer")).backgroundColor', 'rgb(1, 2, 3)');
shouldBeEqualToString('getComputedStyle(document.getElementById("without-renderer")).backgroundColor', 'rgb(1, 2, 3)');
</script>
<script src="../../resources/js-test-post.js"></script>
</html>