Import dom/ from web-platform-tests

third_party/WebKit/LayoutTests/imported/web-platform-tests/dom/nodes/ChildNode-remove.js

+function testRemove(node, parent, type) {
+  test(function() {
+    assert_true("remove" in node);
+    assert_equals(typeof node.remove, "function");
+    assert_equals(node.remove.length, 0);
+  }, type + " should support remove()");
+  test(function() {
+    assert_equals(node.parentNode, null, "Node should not have a parent");
+    assert_equals(node.remove(), undefined);
+    assert_equals(node.parentNode, null, "Removed new node should not have a parent");
+  }, "remove() should work if " + type + " doesn't have a parent");
+  test(function() {
+    assert_equals(node.parentNode, null, "Node should not have a parent");
+    parent.appendChild(node);
+    assert_equals(node.parentNode, parent, "Appended node should have a parent");
+    assert_equals(node.remove(), undefined);
+    assert_equals(node.parentNode, null, "Removed node should not have a parent");
+    assert_array_equals(parent.childNodes, [], "Parent should not have children");
+  }, "remove() should work if " + type + " does have a parent");
+  test(function() {
+    assert_equals(node.parentNode, null, "Node should not have a parent");
+    var before = parent.appendChild(document.createComment("before"));
+    parent.appendChild(node);
+    var after = parent.appendChild(document.createComment("after"));
+    assert_equals(node.parentNode, parent, "Appended node should have a parent");
+    assert_equals(node.remove(), undefined);
+    assert_equals(node.parentNode, null, "Removed node should not have a parent");
+    assert_array_equals(parent.childNodes, [before, after], "Parent should have two children left");
+  }, "remove() should work if " + type + " does have a parent and siblings");
+}