Check in codegen test expectations.

test/codegen/expect/lib/html/url_test.js

+dart_library.library('lib/html/url_test', null, /* Imports */[
+  'dart_sdk',
+  'unittest'
+], function load__url_test(exports, dart_sdk, unittest) {
+  'use strict';
+  const core = dart_sdk.core;
+  const html = dart_sdk.html;
+  const typed_data = dart_sdk.typed_data;
+  const _interceptors = dart_sdk._interceptors;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const html_config = unittest.html_config;
+  const unittest$ = unittest.unittest;
+  const src__matcher__expect = unittest.src__matcher__expect;
+  const src__matcher__numeric_matchers = unittest.src__matcher__numeric_matchers;
+  const src__matcher__string_matchers = unittest.src__matcher__string_matchers;
+  const url_test = Object.create(null);
+  let JSArrayOfUint8List = () => (JSArrayOfUint8List = dart.constFn(_interceptors.JSArray$(typed_data.Uint8List)))();
+  let EventTovoid = () => (EventTovoid = dart.constFn(dart.functionType(dart.void, [html.Event])))();
+  let VoidToBlob = () => (VoidToBlob = dart.constFn(dart.definiteFunctionType(html.Blob, [])))();
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let EventTovoid$ = () => (EventTovoid$ = dart.constFn(dart.definiteFunctionType(dart.void, [html.Event])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  url_test.main = function() {
+    html_config.useHtmlConfiguration();
+    function createImageBlob() {
+      let canvas = html.CanvasElement.new();
+      canvas[dartx.width] = 100;
+      canvas[dartx.height] = 100;
+      let context = canvas[dartx.context2D];
+      context[dartx.fillStyle] = 'red';
+      context[dartx.fillRect](0, 0, canvas[dartx.width], canvas[dartx.height]);
+      let dataUri = canvas[dartx.toDataUrl]('image/png');
+      let byteString = html.window[dartx.atob](dataUri[dartx.split](',')[dartx.get](1));
+      let mimeString = dataUri[dartx.split](',')[dartx.get](0)[dartx.split](':')[dartx.get](1)[dartx.split](';')[dartx.get](0);
+      let arrayBuffer = typed_data.Uint8List.new(byteString[dartx.length]);
+      let dataArray = typed_data.Uint8List.view(arrayBuffer[dartx.buffer]);
+      for (let i = 0; i < dart.notNull(byteString[dartx.length]); i++) {
+        dataArray[dartx.set](i, byteString[dartx.codeUnitAt](i));
+      }
+      let blob = html.Blob.new(JSArrayOfUint8List().of([arrayBuffer]), 'image/png');
+      return blob;
+    }
+    dart.fn(createImageBlob, VoidToBlob());
+    unittest$.group('blob', dart.fn(() => {
+      unittest$.test('createObjectUrlFromBlob', dart.fn(() => {
+        let blob = createImageBlob();
+        let url = html.Url.createObjectUrlFromBlob(blob);
+        src__matcher__expect.expect(url[dartx.length], src__matcher__numeric_matchers.greaterThan(0));
+        src__matcher__expect.expect(url, src__matcher__string_matchers.startsWith('blob:'));
+        let img = html.ImageElement.new();
+        img[dartx.onLoad].listen(EventTovoid()._check(unittest$.expectAsync(dart.fn(_ => {
+          src__matcher__expect.expect(img[dartx.complete], true);
+        }, dynamicTodynamic()))));
+        img[dartx.onError].listen(dart.fn(_ => {
+          src__matcher__expect.fail('URL failed to load.');
+        }, EventTovoid$()));
+        img[dartx.src] = url;
+      }, VoidTodynamic()));
+      unittest$.test('revokeObjectUrl', dart.fn(() => {
+        let blob = createImageBlob();
+        let url = html.Url.createObjectUrlFromBlob(blob);
+        src__matcher__expect.expect(url, src__matcher__string_matchers.startsWith('blob:'));
+        html.Url.revokeObjectUrl(url);
+        let img = html.ImageElement.new();
+        img[dartx.onError].listen(EventTovoid()._check(unittest$.expectAsync(dart.fn(_ => {
+        }, dynamicTodynamic()))));
+        img[dartx.onLoad].listen(dart.fn(_ => {
+          src__matcher__expect.fail('URL should not have loaded.');
+        }, EventTovoid$()));
+        img[dartx.src] = url;
+      }, VoidTodynamic()));
+    }, VoidTovoid()));
+  };
+  dart.fn(url_test.main, VoidTodynamic());
+  // Exports:
+  exports.url_test = url_test;
+});