Check in codegen test expectations.

test/codegen/expect/corelib/iterable_single_where_test.js

Index: test/codegen/expect/corelib/iterable_single_where_test.js
diff --git a/test/codegen/expect/corelib/iterable_single_where_test.js b/test/codegen/expect/corelib/iterable_single_where_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..6b3582d5564c3dda789da04ae89d941dcaec55e9
--- /dev/null
+++ b/test/codegen/expect/corelib/iterable_single_where_test.js
@@ -0,0 +1,47 @@
+dart_library.library('corelib/iterable_single_where_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__iterable_single_where_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 iterable_single_where_test = Object.create(null);
+  let JSArrayOfint = () => (JSArrayOfint = dart.constFn(_interceptors.JSArray$(core.int)))();
+  let JSArrayOfString = () => (JSArrayOfString = dart.constFn(_interceptors.JSArray$(core.String)))();
+  let SetOfint = () => (SetOfint = dart.constFn(core.Set$(core.int)))();
+  let intTobool = () => (intTobool = dart.constFn(dart.definiteFunctionType(core.bool, [core.int])))();
+  let VoidToint = () => (VoidToint = dart.constFn(dart.definiteFunctionType(core.int, [])))();
+  let dynamicTobool = () => (dynamicTobool = dart.constFn(dart.definiteFunctionType(core.bool, [dart.dynamic])))();
+  let StringTobool = () => (StringTobool = dart.constFn(dart.definiteFunctionType(core.bool, [core.String])))();
+  let VoidToString = () => (VoidToString = dart.constFn(dart.definiteFunctionType(core.String, [])))();
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let const$;
+  iterable_single_where_test.main = function() {
+    let list1 = JSArrayOfint().of([1, 2, 3]);
+    let list2 = const$ || (const$ = dart.constList([4, 5, 6], core.int));
+    let list3 = JSArrayOfString().of([]);
+    let set1 = SetOfint().new();
+    set1.add(11);
+    set1.add(12);
+    set1.add(13);
+    let set2 = core.Set.new();
+    expect$.Expect.equals(2, list1[dartx.singleWhere](dart.fn(x => x[dartx.isEven], intTobool())));
+    expect$.Expect.equals(3, list1[dartx.singleWhere](dart.fn(x => x == 3, intTobool())));
+    expect$.Expect.throws(dart.fn(() => list1[dartx.singleWhere](dart.fn(x => x[dartx.isOdd], intTobool())), VoidToint()), dart.fn(e => core.StateError.is(e), dynamicTobool()));
+    expect$.Expect.equals(6, list2[dartx.singleWhere](dart.fn(x => x == 6, intTobool())));
+    expect$.Expect.equals(5, list2[dartx.singleWhere](dart.fn(x => x[dartx.isOdd], intTobool())));
+    expect$.Expect.throws(dart.fn(() => list2[dartx.singleWhere](dart.fn(x => x[dartx.isEven], intTobool())), VoidToint()), dart.fn(e => core.StateError.is(e), dynamicTobool()));
+    expect$.Expect.throws(dart.fn(() => list3[dartx.singleWhere](dart.fn(x => dart.equals(x, 0), StringTobool())), VoidToString()), dart.fn(e => core.StateError.is(e), dynamicTobool()));
+    expect$.Expect.equals(12, set1.singleWhere(dart.fn(x => x[dartx.isEven], intTobool())));
+    expect$.Expect.equals(11, set1.singleWhere(dart.fn(x => x == 11, intTobool())));
+    expect$.Expect.throws(dart.fn(() => set1.singleWhere(dart.fn(x => x[dartx.isOdd], intTobool())), VoidToint()));
+    expect$.Expect.throws(dart.fn(() => set2.singleWhere(dart.fn(x => true, dynamicTobool())), VoidTovoid()), dart.fn(e => core.StateError.is(e), dynamicTobool()));
+  };
+  dart.fn(iterable_single_where_test.main, VoidTodynamic());
+  // Exports:
+  exports.iterable_single_where_test = iterable_single_where_test;
+});