Check in codegen test expectations.

test/codegen/expect/language/issue10204_test.js

Index: test/codegen/expect/language/issue10204_test.js
diff --git a/test/codegen/expect/language/issue10204_test.js b/test/codegen/expect/language/issue10204_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..cd512108b4aa4cac35786e0a5fd148e7249ccbbe
--- /dev/null
+++ b/test/codegen/expect/language/issue10204_test.js
@@ -0,0 +1,57 @@
+dart_library.library('language/issue10204_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__issue10204_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const _interceptors = dart_sdk._interceptors;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const issue10204_test = Object.create(null);
+  let JSArrayOfA = () => (JSArrayOfA = dart.constFn(_interceptors.JSArray$(issue10204_test.A)))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  issue10204_test.a = 2;
+  issue10204_test.Tupe = class Tupe extends core.Object {
+    new() {
+    }
+    get instructionType() {
+      return issue10204_test.a == 2 ? this : new issue10204_test.A();
+    }
+    refine(a, b) {
+      return dart.str`${a}${b}`;
+    }
+  };
+  dart.setSignature(issue10204_test.Tupe, {
+    constructors: () => ({new: dart.definiteFunctionType(issue10204_test.Tupe, [])}),
+    methods: () => ({refine: dart.definiteFunctionType(dart.dynamic, [dart.dynamic, dart.dynamic])})
+  });
+  issue10204_test.Node = class Node extends core.Object {
+    new() {
+      this.inputs = dart.map({a: dart.const(new issue10204_test.Tupe()), b: dart.const(new issue10204_test.Tupe())});
+      this.selector = null;
+      this.isCallOnInterceptor = false;
+    }
+    getDartReceiver() {
+      return dart.test(this.isCallOnInterceptor) ? this.inputs[dartx.get]("a") : this.inputs[dartx.get]("b");
+    }
+  };
+  dart.setSignature(issue10204_test.Node, {
+    methods: () => ({getDartReceiver: dart.definiteFunctionType(dart.dynamic, [])})
+  });
+  issue10204_test.A = class A extends core.Object {
+    visitInvokeDynamicMethod(node) {
+      let receiverType = dart.dload(dart.dsend(node, 'getDartReceiver'), 'instructionType');
+      return dart.dsend(receiverType, 'refine', dart.dload(node, 'selector'), dart.dload(node, 'selector'));
+    }
+  };
+  dart.setSignature(issue10204_test.A, {
+    methods: () => ({visitInvokeDynamicMethod: dart.definiteFunctionType(dart.dynamic, [dart.dynamic])})
+  });
+  issue10204_test.main = function() {
+    expect$.Expect.equals('nullnull', JSArrayOfA().of([new issue10204_test.A()])[dartx.last].visitInvokeDynamicMethod(new issue10204_test.Node()));
+  };
+  dart.fn(issue10204_test.main, VoidTodynamic());
+  // Exports:
+  exports.issue10204_test = issue10204_test;
+});