Robert Nystrom
5bb9e922db
The new formatter supports opting a region of code out from being formatted. I'm applying this marker to all of the multitests since those tests are often very sensitive to formatting and easily broken. This way, anyone touching a multitest (including me when I reformat the tests) doesn't have to remember to not run the formatter on it. Unfortunately, this doesn't opt out 100# of the multitests. There are a handful of multitests that also contain "@dart=" comments and are thus formatted using the old style where the "// dart format off" marker has no effect. For those, we'll have to still be careful to not accidentally format them. Change-Id: I257d0ee1eb44eee57047be06b8520f0ccc7b56d3 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/396162 Auto-Submit: Bob Nystrom <rnystrom@google.com> Commit-Queue: Erik Ernst <eernst@google.com> Reviewed-by: Erik Ernst <eernst@google.com>
121 lines
4.6 KiB
Dart
121 lines
4.6 KiB
Dart
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
|
|
// for details. All rights reserved. Use of this source code is governed by a
|
|
// BSD-style license that can be found in the LICENSE file.
|
|
|
|
// Formatting can break multitests, so don't format them.
|
|
// dart format off
|
|
|
|
import 'dart:math';
|
|
import 'package:expect/expect.dart';
|
|
|
|
Type getType<T>() => T;
|
|
|
|
void testInstantiateToBounds() {
|
|
f<T extends num, U extends T>() => [T, U];
|
|
g<T extends List<U>, U extends int>() => [T, U];
|
|
h<T extends U, U extends num>(T x, U y) => [T, U];
|
|
|
|
// Check that instantiate to bounds creates the correct type arguments
|
|
// during dynamic calls.
|
|
Expect.listEquals([num, num], (f as dynamic)());
|
|
Expect.listEquals([getType<List<int>>(), int], (g as dynamic)());
|
|
Expect.listEquals([num, num], (h as dynamic)(-1, -1));
|
|
|
|
// Check that when instantiate to bounds creates a super-bounded type argument
|
|
// during a dynamic call, an error is thrown.
|
|
i<T extends Iterable<T>>() => null;
|
|
j<T extends Iterable<S>, S extends T>() => null;
|
|
Expect.throwsTypeError(() => (i as dynamic)(), "Super bounded type argument");
|
|
Expect.throwsTypeError(() => (j as dynamic)(), "Super bounded type argument");
|
|
}
|
|
|
|
void testChecksBound() {
|
|
f<T extends num>(T x) => x;
|
|
g<T extends U, U extends num>(T x, U y) => x;
|
|
|
|
// Check that arguments are checked against the correct types when instantiate
|
|
// to bounds produces a type argument during a dynamic call.
|
|
Expect.equals((f as dynamic)(42), 42);
|
|
Expect.equals((g as dynamic)(42.0, 100), 42.0);
|
|
Expect.throwsTypeError(() => (f as dynamic)('42'), "Argument check");
|
|
Expect.throwsTypeError(() => (g as dynamic)('hi', 100), "Argument check");
|
|
|
|
// Check that an actual type argument is checked against the bound during a
|
|
// dynamic call.
|
|
Expect.equals((f as dynamic)<int>(42), 42);
|
|
Expect.equals((g as dynamic)<double, num>(42.0, 100), 42.0);
|
|
Expect.throwsTypeError(() => (g as dynamic)<double, int>(42.0, 100),
|
|
"Type argument bounds check");
|
|
Expect.throwsTypeError(
|
|
() => (f as dynamic)<Object>(42), "Type argument bounds check");
|
|
Expect.throwsTypeError(() => (g as dynamic)<double, int>(42.0, 100),
|
|
"Type argument bounds check");
|
|
Expect.throwsTypeError(() => (g as dynamic)<num, Object>(42.0, 100),
|
|
"Type argument bounds check");
|
|
}
|
|
|
|
typedef G<U> = num Function<T extends U>(T x);
|
|
|
|
typedef F<U> = Object Function<T extends U>(T x);
|
|
|
|
void testSubtype() {
|
|
num f<T extends num>(T x) => x + 2;
|
|
dynamic d = f;
|
|
|
|
// Check that casting to an equal generic function type works
|
|
Expect.equals((f as G<num>)(40), 42);
|
|
Expect.equals((d as G<num>)(40), 42);
|
|
|
|
// Check that casting to a more general generic function type works
|
|
Expect.equals((f as F<num>)(40), 42);
|
|
Expect.equals((d as F<num>)(40), 42);
|
|
|
|
// Check that casting to a generic function with more specific bounds fails
|
|
Expect.throwsTypeError(
|
|
() => (f as G<int>), "Generic functions are invariant");
|
|
Expect.throwsTypeError(
|
|
() => (d as G<int>), "Generic functions are invariant");
|
|
Expect.throwsTypeError(
|
|
() => (f as G<double>), "Generic functions are invariant");
|
|
Expect.throwsTypeError(
|
|
() => (d as G<double>), "Generic functions are invariant");
|
|
Expect.throwsTypeError(
|
|
() => (f as G<Null>), "Generic functions are invariant");
|
|
Expect.throwsTypeError(
|
|
() => (d as G<Null>), "Generic functions are invariant");
|
|
|
|
// Check that casting to a generic function with a more general bound fails
|
|
Expect.throwsTypeError(
|
|
() => (f as G<Object>), "Generic functions are invariant");
|
|
Expect.throwsTypeError(
|
|
() => (d as G<Object>), "Generic functions are invariant");
|
|
|
|
// Check that casting to a generic function with an unrelated bound fails
|
|
Expect.throwsTypeError(
|
|
() => (f as G<String>), "Generic functions are invariant");
|
|
Expect.throwsTypeError(
|
|
() => (d as G<String>), "Generic functions are invariant");
|
|
}
|
|
|
|
void testToString() {
|
|
num f<T extends num, U extends T>(T x, U y) => min(x, y);
|
|
num g<T, U>(T x, U y) => max(x as num, y as num);
|
|
String h<T, U>(T x, U y) => h.runtimeType.toString();
|
|
|
|
// Check that generic method types are printed in a reasonable way
|
|
Expect.isTrue(
|
|
new RegExp(r'<(\w+) extends num, (\w+) extends \1>\(\1, \2\) => num')
|
|
.hasMatch(f.runtimeType.toString()));
|
|
Expect.isTrue(new RegExp(r'<(\w+), (\w+)>\(\1, \2\) => num')
|
|
.hasMatch(g.runtimeType.toString()));
|
|
Expect.isTrue(
|
|
new RegExp(r'<(\w+), (\w+)>\(\1, \2\) => String').hasMatch(h(42, 123.0)));
|
|
}
|
|
|
|
main() {
|
|
testInstantiateToBounds(); //# 01: ok
|
|
testToString(); //# 02: ok
|
|
testChecksBound(); //# 03: ok
|
|
testSubtype(); //# 04: ok
|
|
}
|