Kevin Millikin
64b0ce5b58
The features control-flow-collections and spread-collections have been shipped and it is no longer necessary for tests to explicitly opt into them. Change-Id: I074b91d12e4e485ee4a64147947bb1113899ecdc Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/104780 Auto-Submit: Kevin Millikin <kmillikin@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com> Commit-Queue: Kevin Millikin <kmillikin@google.com>
82 lines
2.9 KiB
Dart
82 lines
2.9 KiB
Dart
// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Test how control flow interacts with inference.
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import 'package:expect/expect.dart';
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import 'utils.dart';
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void main() {
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testBottomUpInference();
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testTopDownInference();
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}
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void testBottomUpInference() {
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// Lists.
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expectListOf<int>([if (true) 1]);
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expectListOf<int>([if (true) 1 else 2]);
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expectListOf<num>([if (true) 1 else 0.2]);
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expectListOf<int>([if (true) 1, 2]);
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expectListOf<num>([if (true) 1, 0.2]);
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expectListOf<dynamic>([if (true) ...[]]);
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expectListOf<int>([if (true) ...<int>[]]);
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// Maps.
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expectMapOf<int, int>({if (true) 1: 1});
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expectMapOf<int, int>({if (true) 1: 1 else 2: 2});
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expectMapOf<num, num>({if (true) 1: 0.1 else 0.2: 2});
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expectMapOf<int, int>({if (true) 1: 1, 2: 2});
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expectMapOf<num, num>({if (true) 1: 0.1, 0.2: 2});
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expectMapOf<dynamic, dynamic>({if (true) ...{}});
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expectMapOf<int, int>({if (true) ...<int, int>{}});
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// Sets.
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expectSetOf<int>({if (true) 1});
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expectSetOf<int>({if (true) 1 else 2});
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expectSetOf<num>({if (true) 1 else 0.2});
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expectSetOf<int>({if (true) 1, 2});
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expectSetOf<num>({if (true) 1, 0.2});
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expectSetOf<dynamic>({if (true) ...[]});
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expectSetOf<int>({if (true) ...<int>[]});
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// If a nested iterable's type is dynamic, the element type is dynamic.
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expectListOf<dynamic>([if (true) ...([] as dynamic)]);
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expectSetOf<dynamic>({1, if (true) ...([] as dynamic)});
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// If a nested maps's type is dynamic, the key and value types are dynamic.
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expectMapOf<dynamic, dynamic>({1: 1, if (true) ...({} as dynamic)});
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}
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void testTopDownInference() {
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// Lists.
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// The context element type is pushed into the branches.
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Expect.listEquals(<int>[1], <int>[if (true) expectInt(1)]);
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Expect.listEquals(<int>[1], <int>[if (false) 9 else expectInt(1)]);
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// Bottom up-inference from elements is not pushed back down into branches.
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Expect.listEquals(<int>[1, 2], [1, if (true) expectDynamic(2)]);
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Expect.listEquals(<int>[1, 2], [1, if (false) 9 else expectDynamic(2)]);
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// Maps.
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// The context element type is pushed into the branches.
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Expect.mapEquals(<int, String>{1: "s"},
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<int, String>{if (true) expectInt(1): expectString("s")});
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// Bottom up-inference from elements is not pushed back down into branches.
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Expect.mapEquals(<int, String>{1: "s", 2: "t"},
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{1: "s", if (true) expectDynamic(2): expectDynamic("t")});
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// Sets.
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// The context element type is pushed into the branches.
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Expect.setEquals(<int>{1}, <int>{if (true) expectInt(1)});
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Expect.setEquals(<int>{1}, <int>{if (false) 9 else expectInt(1)});
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// Bottom up-inference from elements is not pushed back down into branches.
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Expect.setEquals(<int>{1, 2}, {1, if (true) expectDynamic(2)});
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Expect.setEquals(<int>{1, 2}, {1, if (false) 9 else expectDynamic(2)});
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}
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