DevTools: migrate inspector-protocol/dom tests to a new test runner

third_party/WebKit/LayoutTests/inspector-protocol/dom/dom-request-child-nodes-depth.js

+(async function(testRunner) {
+  var {page, session, dp} = await testRunner.startHTML(`
+    <div id="depth-1">
+        <div id="depth-2">
+            <div id="depth-3">
+                <div id="depth-4">
+                    <div id="depth-5">
+                        <div id="depth-6">
+                            <div id="depth-7">
+                                <div id="depth-8">
+                                    <div id="depth-9">
+                                        <div id="depth-10">
+                                        </div>
+                                    </div>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+  `, '');
+  testRunner.log("\n=== Get the Document ===\n");
+  var response = await dp.DOM.getDocument();
+  var bodyId = response.result.root.children[0].children[1].nodeId;
+
+  testRunner.log("\n=== Get immediate children of the body ===\n");
+  dp.DOM.requestChildNodes({nodeId: bodyId});
+  var message = await dp.DOM.onceSetChildNodes();
+  var firstDiv = message.params.nodes[0];
+  assert("First child is a div", firstDiv.localName, "div");
+  assert("First child is div#depth-1", firstDiv.attributes[1], "depth-1");
+  assert("First child has one child", firstDiv.childNodeCount, 1);
+  assert("First child has no .children property", firstDiv.children, undefined);
+
+  testRunner.log("\n=== Get children of div#depth-1 three levels deep ===\n");
+  dp.DOM.requestChildNodes({nodeId: firstDiv.nodeId, depth: 3});
+  var message = await dp.DOM.onceSetChildNodes();
+  var depth = 1;
+  var firstChild = message.params.nodes[0];
+  var node = firstChild;
+  while (node && node.children) {
+    depth++;
+    node = node.children[0];
+  }
+  assert("div#depth-1 has nodes 3 levels deep", depth, 3);
+
+  testRunner.log("\n=== Get all children of body ===\n");
+  dp.DOM.requestChildNodes({nodeId: firstDiv.nodeId, depth: -1});
+  var message = await dp.DOM.onceSetChildNodes();
+  var depth = 0;
+  var firstChild = message.params.nodes[0];
+  var node = firstChild;
+  while (node && node.children) {
+    depth++;
+    node = node.children[0];
+  }
+  // We have requested nodes 3-level deep so far, so
+  // we should have gotten an additional 6 levels of depth.
+  assert("div#depth-1 has nodes 9 levels deep", depth, 6);
+
+  testRunner.log("\n=== Pass an invalid depth ===\n");
+  var response = await dp.DOM.requestChildNodes({nodeId: firstDiv.nodeId, depth: 0});
+  if (response.error)
+    testRunner.log("Backend error: " + response.error.message + " (" + response.error.code + ")\n");
+  testRunner.completeTest();
+
+  function assert(message, actual, expected) {
+    if (actual === expected) {
+      testRunner.log("PASS: " + message);
+    } else {
+      testRunner.log("FAIL: " + message + ", expected \"" + expected + "\" but got \"" + actual + "\"");
+      testRunner.completeTest();
+    }
+  };
+});
+