fix how DDC finds its undefined constant

pkg/dev_compiler/test/codegen_expected/equality_test.js

 define(['dart_sdk', 'expect'], function(dart_sdk, expect) {
   'use strict';
   const core = dart_sdk.core;
   const dart = dart_sdk.dart;
   const dartx = dart_sdk.dartx;
   const minitest = expect.minitest;
   const equality_test = Object.create(null);
+  const $_get = dartx._get;
+  const $equals = dartx['=='];
   let TToT = () => (TToT = dart.constFn(dart.gFnType(T => [T, [T]])))();
   let VoidToT = () => (VoidToT = dart.constFn(dart.gFnType(T => [T, []])))();
   let VoidToNull = () => (VoidToNull = dart.constFn(dart.fnType(core.Null, [])))();
   let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.fnType(dart.dynamic, [])))();
   equality_test.Music = class Music extends core.Object {
     toString() {
       return {
         0: "Music.country",
         1: "Music.western"
       }[this.index];
     }
   };
   (equality_test.Music.new = function(x) {
     this.index = x;
   }).prototype = equality_test.Music.prototype;
   dart.setSignature(equality_test.Music, {
     fields: () => ({index: dart.finalFieldType(core.int)})
   });
   dart.defineEnumValues(equality_test.Music, [
     'country',
     'western'
   ]);
   equality_test.BluesBrother = class BluesBrother extends core.Object {};
   (equality_test.BluesBrother.new = function() {
   }).prototype = equality_test.BluesBrother.prototype;
+  dart.addTypeTests(equality_test.BluesBrother);
   equality_test._Jake = class _Jake extends equality_test.BluesBrother {};
   (equality_test._Jake.new = function() {
   }).prototype = equality_test._Jake.prototype;
+  dart.addTypeTests(equality_test._Jake);
   equality_test._Elwood = class _Elwood extends equality_test.BluesBrother {
     ['=='](other) {
       return equality_test._Elwood.is(other);
     }
   };
   (equality_test._Elwood.new = function() {
   }).prototype = equality_test._Elwood.prototype;
+  dart.addTypeTests(equality_test._Elwood);
   dart.setSignature(equality_test._Elwood, {
     methods: () => ({'==': dart.fnType(core.bool, [core.Object])})
   });
   equality_test._Norman = class _Norman extends equality_test.BluesBrother {};
   (equality_test._Norman.new = function() {
   }).prototype = equality_test._Norman.prototype;
+  dart.addTypeTests(equality_test._Norman);
   equality_test.hideNull = function(T) {
     return x => {
       return x;
     };
   };
   dart.fn(equality_test.hideNull, TToT());
   equality_test.getUndefined = function(T) {
     return () => {
-      return T._check(core.List.new(1)[dartx._get](0));
+      return T._check(core.List.new(1)[$_get](0));
     };
   };
   dart.fn(equality_test.getUndefined, VoidToT());
   equality_test.main = function() {
     minitest.group('Enum equality', dart.fn(() => {
       minitest.test('Equal enum/enum (nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(equality_test.Music)(equality_test.Music.country);
         let e2 = equality_test.hideNull(equality_test.Music)(equality_test.Music.western);
         let d1 = equality_test.hideNull(equality_test.Music)(equality_test.Music.country);
         let d2 = equality_test.hideNull(equality_test.Music)(equality_test.Music.western);
@@ skipping 78 matching lines @@
         minitest.expect(e1 === s1, false);
         minitest.expect(e1 === s2, false);
         minitest.expect(e1 === i1, false);
         minitest.expect(e1 === i2, false);
         minitest.expect(e1 === l1, false);
         minitest.expect(e1 === b1, false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
       }, VoidToNull()));
       minitest.test('Equal enum/other (dynamic, nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(equality_test.Music)(equality_test.Music.country);
         let d1 = equality_test.hideNull(equality_test.Music)(equality_test.Music.country);
         let s1 = equality_test.hideNull(core.String)("hello");
         let s2 = equality_test.hideNull(core.String)("");
         let i1 = equality_test.hideNull(core.int)(3);
         let i2 = equality_test.hideNull(core.int)(0);
         let l1 = equality_test.hideNull(core.List)(core.List.new(3));
@@ skipping 35 matching lines @@
         minitest.expect(e1 === s1, false);
         minitest.expect(e1 === s2, false);
         minitest.expect(e1 === i1, false);
         minitest.expect(e1 === i2, false);
         minitest.expect(e1 === l1, false);
         minitest.expect(e1 === b1, false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
         minitest.expect(dart.equals(d1, s1), false);
         minitest.expect(dart.equals(d1, s2), false);
         minitest.expect(dart.equals(d1, i1), false);
         minitest.expect(dart.equals(d1, i2), false);
         minitest.expect(dart.equals(d1, l1), false);
         minitest.expect(dart.equals(d1, b1), false);
         minitest.expect(s1 === d1, false);
         minitest.expect(s2 === d1, false);
         minitest.expect(i1 === d1, false);
         minitest.expect(i2 === d1, false);
-        minitest.expect(l1[dartx['==']](d1), false);
+        minitest.expect(l1[$equals](d1), false);
         minitest.expect(b1['=='](d1), false);
       }, VoidToNull()));
     }, VoidToNull()));
     minitest.group('String equality', dart.fn(() => {
       minitest.test('Equal string/string (nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(core.String)("The");
         let e2 = equality_test.hideNull(core.String)("Band");
         let d1 = equality_test.hideNull(core.String)("The");
         let d2 = equality_test.hideNull(core.String)("Band");
         let o1 = equality_test.hideNull(core.Object)("The");
@@ skipping 77 matching lines @@
         minitest.expect(e1 === s1, false);
         minitest.expect(e1 === s2, false);
         minitest.expect(e1 === i1, false);
         minitest.expect(e1 === i2, false);
         minitest.expect(e1 === l1, false);
         minitest.expect(e1 === b1, false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
       }, VoidToNull()));
       minitest.test('Equal string/other (dynamic, nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(core.String)("The");
         let d1 = equality_test.hideNull(core.String)("The");
         let s1 = equality_test.hideNull(core.String)("hello");
         let s2 = equality_test.hideNull(core.String)("");
         let i1 = equality_test.hideNull(core.int)(3);
         let i2 = equality_test.hideNull(core.int)(0);
         let l1 = equality_test.hideNull(core.List)(core.List.new(3));
@@ skipping 35 matching lines @@
         minitest.expect(e1 === s1, false);
         minitest.expect(e1 === s2, false);
         minitest.expect(e1 === i1, false);
         minitest.expect(e1 === i2, false);
         minitest.expect(e1 === l1, false);
         minitest.expect(e1 === b1, false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
         minitest.expect(dart.equals(d1, s1), false);
         minitest.expect(dart.equals(d1, s2), false);
         minitest.expect(dart.equals(d1, i1), false);
         minitest.expect(dart.equals(d1, i2), false);
         minitest.expect(dart.equals(d1, l1), false);
         minitest.expect(dart.equals(d1, b1), false);
         minitest.expect(s1 === d1, false);
         minitest.expect(s2 === d1, false);
         minitest.expect(i1 === d1, false);
         minitest.expect(i2 === d1, false);
-        minitest.expect(l1[dartx['==']](d1), false);
+        minitest.expect(l1[$equals](d1), false);
         minitest.expect(b1['=='](d1), false);
       }, VoidToNull()));
     }, VoidToNull()));
     minitest.group('Boolean equality', dart.fn(() => {
       minitest.test('Equal bool/bool (nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(core.bool)(true);
         let e2 = equality_test.hideNull(core.bool)(false);
         let d1 = equality_test.hideNull(core.bool)(true);
         let d2 = equality_test.hideNull(core.bool)(false);
         let o1 = equality_test.hideNull(core.Object)(true);
@@ skipping 77 matching lines @@
         minitest.expect(e1 === s1, false);
         minitest.expect(e1 === s2, false);
         minitest.expect(e1 === i1, false);
         minitest.expect(e1 === i2, false);
         minitest.expect(e1 === l1, false);
         minitest.expect(e1 === b1, false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
       }, VoidToNull()));
       minitest.test('Equal bool/other (dynamic, nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(core.bool)(true);
         let d1 = equality_test.hideNull(core.bool)(true);
         let s1 = equality_test.hideNull(core.String)("hello");
         let s2 = equality_test.hideNull(core.String)("");
         let i1 = equality_test.hideNull(core.int)(3);
         let i2 = equality_test.hideNull(core.int)(0);
         let l1 = equality_test.hideNull(core.List)(core.List.new(3));
@@ skipping 35 matching lines @@
         minitest.expect(e1 === s1, false);
         minitest.expect(e1 === s2, false);
         minitest.expect(e1 === i1, false);
         minitest.expect(e1 === i2, false);
         minitest.expect(e1 === l1, false);
         minitest.expect(e1 === b1, false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
         minitest.expect(dart.equals(d1, s1), false);
         minitest.expect(dart.equals(d1, s2), false);
         minitest.expect(dart.equals(d1, i1), false);
         minitest.expect(dart.equals(d1, i2), false);
         minitest.expect(dart.equals(d1, l1), false);
         minitest.expect(dart.equals(d1, b1), false);
         minitest.expect(s1 === d1, false);
         minitest.expect(s2 === d1, false);
         minitest.expect(i1 === d1, false);
         minitest.expect(i2 === d1, false);
-        minitest.expect(l1[dartx['==']](d1), false);
+        minitest.expect(l1[$equals](d1), false);
         minitest.expect(b1['=='](d1), false);
       }, VoidToNull()));
     }, VoidToNull()));
     minitest.group('String equality', dart.fn(() => {
       minitest.test('Equal string/string (nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(core.String)("The");
         let e2 = equality_test.hideNull(core.String)("Band");
         let d1 = equality_test.hideNull(core.String)("The");
         let d2 = equality_test.hideNull(core.String)("Band");
         let o1 = equality_test.hideNull(core.Object)("The");
@@ skipping 77 matching lines @@
         minitest.expect(e1 === s1, false);
         minitest.expect(e1 === s2, false);
         minitest.expect(e1 === i1, false);
         minitest.expect(e1 === i2, false);
         minitest.expect(e1 === l1, false);
         minitest.expect(e1 === b1, false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
       }, VoidToNull()));
       minitest.test('Equal string/other (dynamic, nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(core.String)("The");
         let d1 = equality_test.hideNull(core.String)("The");
         let s1 = equality_test.hideNull(core.String)("hello");
         let s2 = equality_test.hideNull(core.String)("");
         let i1 = equality_test.hideNull(core.int)(3);
         let i2 = equality_test.hideNull(core.int)(0);
         let l1 = equality_test.hideNull(core.List)(core.List.new(3));
@@ skipping 35 matching lines @@
         minitest.expect(e1 === s1, false);
         minitest.expect(e1 === s2, false);
         minitest.expect(e1 === i1, false);
         minitest.expect(e1 === i2, false);
         minitest.expect(e1 === l1, false);
         minitest.expect(e1 === b1, false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
         minitest.expect(dart.equals(d1, s1), false);
         minitest.expect(dart.equals(d1, s2), false);
         minitest.expect(dart.equals(d1, i1), false);
         minitest.expect(dart.equals(d1, i2), false);
         minitest.expect(dart.equals(d1, l1), false);
         minitest.expect(dart.equals(d1, b1), false);
         minitest.expect(s1 === d1, false);
         minitest.expect(s2 === d1, false);
         minitest.expect(i1 === d1, false);
         minitest.expect(i2 === d1, false);
-        minitest.expect(l1[dartx['==']](d1), false);
+        minitest.expect(l1[$equals](d1), false);
         minitest.expect(b1['=='](d1), false);
       }, VoidToNull()));
     }, VoidToNull()));
     minitest.group('Number equality', dart.fn(() => {
       minitest.test('Equal int/int (nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(core.int)(11);
         let e2 = equality_test.hideNull(core.int)(12);
         let d1 = equality_test.hideNull(core.int)(11);
         let d2 = equality_test.hideNull(core.int)(12);
         let o1 = equality_test.hideNull(core.Object)(11);
@@ skipping 77 matching lines @@
         minitest.expect(e1 === s1, false);
         minitest.expect(e1 === s2, false);
         minitest.expect(e1 === i1, false);
         minitest.expect(e1 === i2, false);
         minitest.expect(e1 === l1, false);
         minitest.expect(e1 === b1, false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
       }, VoidToNull()));
       minitest.test('Equal int/other (dynamic, nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(core.int)(11);
         let d1 = equality_test.hideNull(core.int)(11);
         let s1 = equality_test.hideNull(core.String)("hello");
         let s2 = equality_test.hideNull(core.String)("");
         let i1 = equality_test.hideNull(core.int)(3);
         let i2 = equality_test.hideNull(core.int)(0);
         let l1 = equality_test.hideNull(core.List)(core.List.new(3));
@@ skipping 35 matching lines @@
         minitest.expect(e1 === s1, false);
         minitest.expect(e1 === s2, false);
         minitest.expect(e1 === i1, false);
         minitest.expect(e1 === i2, false);
         minitest.expect(e1 === l1, false);
         minitest.expect(e1 === b1, false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
         minitest.expect(dart.equals(d1, s1), false);
         minitest.expect(dart.equals(d1, s2), false);
         minitest.expect(dart.equals(d1, i1), false);
         minitest.expect(dart.equals(d1, i2), false);
         minitest.expect(dart.equals(d1, l1), false);
         minitest.expect(dart.equals(d1, b1), false);
         minitest.expect(s1 === d1, false);
         minitest.expect(s2 === d1, false);
         minitest.expect(i1 === d1, false);
         minitest.expect(i2 === d1, false);
-        minitest.expect(l1[dartx['==']](d1), false);
+        minitest.expect(l1[$equals](d1), false);
         minitest.expect(b1['=='](d1), false);
       }, VoidToNull()));
     }, VoidToNull()));
     minitest.group('Object equality', dart.fn(() => {
       minitest.test('Equal object/object (nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(equality_test._Jake)(new equality_test._Jake.new());
         let e2 = equality_test.hideNull(equality_test._Elwood)(new equality_test._Elwood.new());
         let d1 = equality_test.hideNull(equality_test._Jake)(e1);
         let d2 = equality_test.hideNull(equality_test._Elwood)(new equality_test._Elwood.new());
         let o1 = equality_test.hideNull(core.Object)(e1);
@@ skipping 77 matching lines @@
         minitest.expect(e1['=='](s1), false);
         minitest.expect(e1['=='](s2), false);
         minitest.expect(e1['=='](i1), false);
         minitest.expect(e1['=='](i2), false);
         minitest.expect(e1['=='](l1), false);
         minitest.expect(e1['=='](b1), false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
       }, VoidToNull()));
       minitest.test('Equal object/other (dynamic, nullable)', dart.fn(() => {
         let e1 = equality_test.hideNull(equality_test._Jake)(new equality_test._Jake.new());
         let d1 = equality_test.hideNull(equality_test._Jake)(new equality_test._Jake.new());
         let s1 = equality_test.hideNull(core.String)("hello");
         let s2 = equality_test.hideNull(core.String)("");
         let i1 = equality_test.hideNull(core.int)(3);
         let i2 = equality_test.hideNull(core.int)(0);
         let l1 = equality_test.hideNull(core.List)(core.List.new(3));
@@ skipping 35 matching lines @@
         minitest.expect(e1['=='](s1), false);
         minitest.expect(e1['=='](s2), false);
         minitest.expect(e1['=='](i1), false);
         minitest.expect(e1['=='](i2), false);
         minitest.expect(e1['=='](l1), false);
         minitest.expect(e1['=='](b1), false);
         minitest.expect(s1 === e1, false);
         minitest.expect(s2 === e1, false);
         minitest.expect(i1 === e1, false);
         minitest.expect(i2 === e1, false);
-        minitest.expect(l1[dartx['==']](e1), false);
+        minitest.expect(l1[$equals](e1), false);
         minitest.expect(b1['=='](e1), false);
         minitest.expect(dart.equals(d1, s1), false);
         minitest.expect(dart.equals(d1, s2), false);
         minitest.expect(dart.equals(d1, i1), false);
         minitest.expect(dart.equals(d1, i2), false);
         minitest.expect(dart.equals(d1, l1), false);
         minitest.expect(dart.equals(d1, b1), false);
         minitest.expect(s1 === d1, false);
         minitest.expect(s2 === d1, false);
         minitest.expect(i1 === d1, false);
         minitest.expect(i2 === d1, false);
-        minitest.expect(l1[dartx['==']](d1), false);
+        minitest.expect(l1[$equals](d1), false);
         minitest.expect(b1['=='](d1), false);
       }, VoidToNull()));
     }, VoidToNull()));
     minitest.group('Null/undefined equality', dart.fn(() => {
       minitest.test('Equal object/other (static, null)', dart.fn(() => {
         let n = equality_test.hideNull(equality_test.BluesBrother)(null);
         let u1 = equality_test.getUndefined(core.String)();
         let u2 = equality_test.getUndefined(core.int)();
         let u3 = equality_test.getUndefined(core.bool)();
         let u4 = equality_test.getUndefined(core.List)();
@@ skipping 75 matching lines @@
   };
   dart.fn(equality_test.main, VoidTodynamic());
   dart.trackLibraries("equality_test", {
     "equality_test.dart": equality_test
   }, null);
   // Exports:
   return {
     equality_test: equality_test
   };
 });