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Added new tests.

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One test verifies that the default values of fromEnvironment
constructors are the values false/0/''.

The other new test verifies that it is allowed to invoke an expression
whose static type is a proper subtype of a function type (X extends F,
where F is a function type), cf.
https://github.com/dart-lang/language/issues/896.

Change-Id: I4ee32df7c5950be07b800027f000a486bf3af61c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/141249
Commit-Queue: Erik Ernst <eernst@google.com>
Reviewed-by: Lasse R.H. Nielsen <lrn@google.com>
This commit is contained in:
Erik Ernst 2020-03-27 19:02:52 +00:00 committed by commit-bot@chromium.org
parent 7a2c8b3f90
commit 7afb23a7d9
3 changed files with 65 additions and 0 deletions
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20
tests/corelib/from_environment_default_value_test.dart Normal file
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// Copyright (c) 2020, 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.
import "package:expect/expect.dart";
main() {
// Verify that the default value is as expected.
Expect.equals(false, const bool.fromEnvironment('UNDEFINED_NAME'));
Expect.equals(0, const int.fromEnvironment('UNDEFINED_NAME'));
Expect.equals('', const String.fromEnvironment('UNDEFINED_NAME'));
// Verify that `defaultValue` is used when passed, not the default values.
Expect.equals(
true, const bool.fromEnvironment('UNDEFINED_NAME', defaultValue: true));
Expect.equals(
1, const int.fromEnvironment('UNDEFINED_NAME', defaultValue: 1));
Expect.equals('qux',
const String.fromEnvironment('UNDEFINED_NAME', defaultValue: 'qux'));
}

20
tests/corelib_2/from_environment_default_value_test.dart Normal file
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// Copyright (c) 2020, 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.
import "package:expect/expect.dart";
main() {
// Verify that the default value is as expected.
Expect.equals(false, const bool.fromEnvironment('UNDEFINED_NAME'));
Expect.equals(0, const int.fromEnvironment('UNDEFINED_NAME'));
Expect.equals('', const String.fromEnvironment('UNDEFINED_NAME'));
// Verify that `defaultValue` is used when passed, not the default values.
Expect.equals(
true, const bool.fromEnvironment('UNDEFINED_NAME', defaultValue: true));
Expect.equals(
1, const int.fromEnvironment('UNDEFINED_NAME', defaultValue: 1));
Expect.equals('qux',
const String.fromEnvironment('UNDEFINED_NAME', defaultValue: 'qux'));
}

25
tests/language_2/function_subtype/call_type_variable_test.dart Normal file
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// Copyright (c) 2020, 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.
import "package:expect/expect.dart";
// Test that it is possible to invoke an object whose type is a proper subtype
// of a function type (that is, its type is 'function-type bounded', and we
// get to call it as if its type had been that bound).
class A<X, Y extends X Function(X)> {
final Y f;
A(this.f);
X m(X value) => f(value);
}
class B extends A<String, String Function(String, {int i})> {
B(String Function(String, {int i}) f) : super(f);
String m(String value) => f(value, i: 42);
}
void main() {
B b = B((String s, {int i}) => "$s and $i");
Expect.equals('24 and 42', b.m('24'));
}