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/* eslint-disable no-restricted-properties */
// SPDX-License-Identifier: MIT OR LGPL-2.0-or-later
// SPDX-FileCopyrightText: 2008 litl, LLC
// tests for imports.lang module
// except for Lang.Class and Lang.Interface, which are tested in testLegacyClass
const Lang = imports.lang;
describe('Lang module', function () {
it('counts properties with Lang.countProperties()', function () {
var foo = {'a': 10, 'b': 11};
expect(Lang.countProperties(foo)).toEqual(2);
});
it('copies properties from one object to another with Lang.copyProperties()', function () {
var foo = {'a': 10, 'b': 11};
var bar = {};
Lang.copyProperties(foo, bar);
expect(bar).toEqual(foo);
});
it('copies properties without an underscore with Lang.copyPublicProperties()', function () {
var foo = {'a': 10, 'b': 11, '_c': 12};
var bar = {};
Lang.copyPublicProperties(foo, bar);
expect(bar).toEqual({'a': 10, 'b': 11});
});
it('copies property getters and setters', function () {
var foo = {
'a': 10,
'b': 11,
get c() {
return this.a;
},
set c(n) {
this.a = n;
},
};
var bar = {};
Lang.copyProperties(foo, bar);
expect(bar.__lookupGetter__('c')).not.toBeNull();
expect(bar.__lookupSetter__('c')).not.toBeNull();
// this should return the value of 'a'
expect(bar.c).toEqual(10);
// this should set 'a' value
bar.c = 13;
expect(bar.a).toEqual(13);
});
describe('bind()', function () {
let o;
beforeEach(function () {
o = {
callback() {
return true;
},
};
spyOn(o, 'callback').and.callThrough();
});
it('calls the bound function with the supplied this-object', function () {
let callback = Lang.bind(o, o.callback);
callback();
expect(o.callback.calls.mostRecent()).toEqual(jasmine.objectContaining({
object: o,
args: [],
returnValue: true,
}));
});
it('throws an error when no function supplied', function () {
expect(() => Lang.bind(o, undefined)).toThrow();
});
it('throws an error when this-object undefined', function () {
expect(() => Lang.bind(undefined, function () {})).toThrow();
});
it('supplies extra arguments to the function', function () {
let callback = Lang.bind(o, o.callback, 42, 1138);
callback();
expect(o.callback).toHaveBeenCalledWith(42, 1138);
});
it('appends the extra arguments to any arguments passed', function () {
let callback = Lang.bind(o, o.callback, 42, 1138);
callback(1, 2, 3);
expect(o.callback).toHaveBeenCalledWith(1, 2, 3, 42, 1138);
});
});
});
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