Check in codegen test expectations.

test/codegen/expect/language/const_string_test.js

Index: test/codegen/expect/language/const_string_test.js
diff --git a/test/codegen/expect/language/const_string_test.js b/test/codegen/expect/language/const_string_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..c6b8037ad615bd323a33db3002cad6d6ba8a0f06
--- /dev/null
+++ b/test/codegen/expect/language/const_string_test.js
@@ -0,0 +1,38 @@
+dart_library.library('language/const_string_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__const_string_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const const_string_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  const_string_test.main = function() {
+    expect$.Expect.isTrue(core.identical("abcd", 'abcd'));
+    expect$.Expect.isTrue(core.identical('abcd', "abcd"));
+    expect$.Expect.isTrue(core.identical("ab\"cd", 'ab"cd'));
+    expect$.Expect.isTrue(core.identical('ab\'cd', "ab'cd"));
+    expect$.Expect.isTrue(core.identical("abcd", "ab" + "cd"));
+    expect$.Expect.isTrue(core.identical("abcd", "ab" + 'cd'));
+    expect$.Expect.isTrue(core.identical("abcd", 'ab' + 'cd'));
+    expect$.Expect.isTrue(core.identical("abcd", 'ab' + "cd"));
+    expect$.Expect.isTrue(core.identical("abcd", "a" + "b" + "cd"));
+    expect$.Expect.isTrue(core.identical("abcd", "a" + "b" + "c" + "d"));
+    expect$.Expect.isTrue(core.identical('abcd', 'a' + 'b' + 'c' + 'd'));
+    expect$.Expect.isTrue(core.identical("abcd", "a" + "b" + 'c' + "d"));
+    expect$.Expect.isTrue(core.identical("abcd", 'a' + 'b' + 'c' + 'd'));
+    expect$.Expect.isTrue(core.identical("abcd", 'a' + "b" + 'c' + "d"));
+    expect$.Expect.isTrue(core.identical("a'b'cd", "a" + "'b'" + 'c' + "d"));
+    expect$.Expect.isTrue(core.identical("a\"b\"cd", "a" + '"b"' + 'c' + "d"));
+    expect$.Expect.isTrue(core.identical("a\"b\"cd", "a" + '"b"' + 'c' + "d"));
+    expect$.Expect.isTrue(core.identical("a'b'cd", 'a' + "'b'" + 'c' + "d"));
+    expect$.Expect.isTrue(core.identical('a\'b\'cd', "a" + "'b'" + 'c' + "d"));
+    expect$.Expect.isTrue(core.identical('a"b"cd', 'a' + '"b"' + 'c' + "d"));
+    expect$.Expect.isTrue(core.identical("a\"b\"cd", 'a' + '"b"' + 'c' + "d"));
+  };
+  dart.fn(const_string_test.main, VoidTodynamic());
+  // Exports:
+  exports.const_string_test = const_string_test;
+});