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[package:js] Add JS test for function parameters

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Adds tests for JS objects with functions with positional and
optional parameters. It does not include named arguments as those
should be statically disallowed.

Change-Id: I24acadc8160d3515bb79b00dc6ab28b528e2b039
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/148221
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
This commit is contained in:
Srujan Gaddam 2020-05-28 00:00:04 +00:00 committed by commit-bot@chromium.org
parent 7a63d5889c
commit df36449d72
2 changed files with 172 additions and 0 deletions
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86
tests/lib/js/parameters_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.
// Tests positional and optional arguments for various JS objects.
@JS()
library js_parameters_test;
import 'package:js/js.dart';
import 'package:expect/expect.dart';
@JS()
external void eval(String code);
@JS()
class Foo {
external factory Foo();
external singleArg(a);
external singlePositionalArg([dynamic? a]);
external mixedPositionalArgs(a, [dynamic? b]);
}
@JS()
class Bar {
external static singleArg(a);
external static singlePositionalArg([dynamic? a]);
external static mixedPositionalArgs(a, [dynamic? b]);
}
external singleArg(a);
external singlePositionalArg([dynamic? a]);
external mixedPositionalArgs(a, [dynamic? b]);
main() {
eval(r"""
function Foo() {}
Foo.prototype.singleArg = function(a) {
return a;
}
Foo.prototype.singlePositionalArg = singleArg;
Foo.prototype.mixedPositionalArgs = function(a, b) {
if (arguments.length == 0) return a;
return arguments[arguments.length - 1];
}
var Bar = {
singleArg: function(a) {
return a;
},
singlePositionalArg: singleArg,
mixedPositionalArgs: function(a, b) {
if (arguments.length == 0) return a;
return arguments[arguments.length - 1];
},
};
function singleArg(a) {
return a;
}
var singlePositionalArg = singleArg;
function mixedPositionalArgs(a, b) {
if (arguments.length == 0) return a;
return arguments[arguments.length - 1];
}
""");
var foo = Foo();
Expect.equals(foo.singleArg(2), 2);
Expect.equals(foo.singlePositionalArg(2), 2);
Expect.equals(foo.singlePositionalArg(), null);
Expect.equals(foo.mixedPositionalArgs(3), 3);
Expect.equals(foo.mixedPositionalArgs(3, 4), 4);
Expect.equals(Bar.singleArg(2), 2);
Expect.equals(Bar.singlePositionalArg(2), 2);
Expect.equals(Bar.singlePositionalArg(), null);
Expect.equals(Bar.mixedPositionalArgs(3), 3);
Expect.equals(Bar.mixedPositionalArgs(3, 4), 4);
Expect.equals(singleArg(2), 2);
Expect.equals(singlePositionalArg(2), 2);
Expect.equals(singlePositionalArg(), null);
Expect.equals(mixedPositionalArgs(3), 3);
Expect.equals(mixedPositionalArgs(3, 4), 4);
}

86
tests/lib_2/js/parameters_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.
// Tests positional and optional arguments for various JS objects.
@JS()
library js_parameters_test;
import 'package:js/js.dart';
import 'package:expect/expect.dart';
@JS()
external void eval(String code);
@JS()
class Foo {
external factory Foo();
external singleArg(a);
external singlePositionalArg([dynamic a]);
external mixedPositionalArgs(a, [dynamic b]);
}
@JS()
class Bar {
external static singleArg(a);
external static singlePositionalArg([dynamic a]);
external static mixedPositionalArgs(a, [dynamic b]);
}
external singleArg(a);
external singlePositionalArg([dynamic a]);
external mixedPositionalArgs(a, [dynamic b]);
main() {
eval(r"""
function Foo() {}
Foo.prototype.singleArg = function(a) {
return a;
}
Foo.prototype.singlePositionalArg = singleArg;
Foo.prototype.mixedPositionalArgs = function(a, b) {
if (arguments.length == 0) return a;
return arguments[arguments.length - 1];
}
var Bar = {
singleArg: function(a) {
return a;
},
singlePositionalArg: singleArg,
mixedPositionalArgs: function(a, b) {
if (arguments.length == 0) return a;
return arguments[arguments.length - 1];
},
};
function singleArg(a) {
return a;
}
var singlePositionalArg = singleArg;
function mixedPositionalArgs(a, b) {
if (arguments.length == 0) return a;
return arguments[arguments.length - 1];
}
""");
var foo = Foo();
Expect.equals(foo.singleArg(2), 2);
Expect.equals(foo.singlePositionalArg(2), 2);
Expect.equals(foo.singlePositionalArg(), null);
Expect.equals(foo.mixedPositionalArgs(3), 3);
Expect.equals(foo.mixedPositionalArgs(3, 4), 4);
Expect.equals(Bar.singleArg(2), 2);
Expect.equals(Bar.singlePositionalArg(2), 2);
Expect.equals(Bar.singlePositionalArg(), null);
Expect.equals(Bar.mixedPositionalArgs(3), 3);
Expect.equals(Bar.mixedPositionalArgs(3, 4), 4);
Expect.equals(singleArg(2), 2);
Expect.equals(singlePositionalArg(2), 2);
Expect.equals(singlePositionalArg(), null);
Expect.equals(mixedPositionalArgs(3), 3);
Expect.equals(mixedPositionalArgs(3, 4), 4);
}