[DevTools] New harness for inspector-protocol layout tests

third_party/WebKit/LayoutTests/inspector-protocol/page/frameAttachedDetached.js

Index: third_party/WebKit/LayoutTests/inspector-protocol/page/frameAttachedDetached.js
diff --git a/third_party/WebKit/LayoutTests/inspector-protocol/page/frameAttachedDetached.js b/third_party/WebKit/LayoutTests/inspector-protocol/page/frameAttachedDetached.js
new file mode 100644
index 0000000000000000000000000000000000000000..2289713db32e487f2764e822502736bbb0411d72
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/inspector-protocol/page/frameAttachedDetached.js
@@ -0,0 +1,25 @@
+(async function(testRunner) {
+  let {page, session, dp} = await testRunner.startBlank('');
+
+  dp.Page.enable();
+  session.evaluate(`
+    window.frame = document.createElement('iframe');
+    frame.src = '${testRunner.url('../resources/blank.html')}';
+    document.body.appendChild(frame);
+  `);
+  await dp.Page.onceFrameAttached();
+  testRunner.log('Attached');
+  await dp.Page.onceFrameStartedLoading();
+  testRunner.log('Started loading');
+  await dp.Page.onceFrameNavigated();
+  testRunner.log('Navigated');
+  session.evaluate('frame.src = "about:blank"');
+  await dp.Page.onceFrameStartedLoading();
+  testRunner.log('Started loading');
+  await dp.Page.onceFrameNavigated();
+  testRunner.log('Navigated');
+  session.evaluate('document.body.removeChild(frame);');
+  await dp.Page.onceFrameDetached();
+  testRunner.log('Detached');
+  testRunner.completeTest();
+})