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describe('Object', function () {
"use strict";
describe("Object.keys", function () {
var obj = {
"str": "boz",
"obj": { },
"arr": [],
"bool": true,
"num": 42,
"null": null,
"undefined": undefined
};
var loopedValues = [];
for (var k in obj) {
loopedValues.push(k);
}
var keys = Object.keys(obj);
it('should have correct length', function () {
expect(keys.length).toBe(7);
});
it('should return an Array', function () {
expect(Array.isArray(keys)).toBe(true);
});
it('should return names which are own properties', function () {
keys.forEach(function (name) {
expect(obj.hasOwnProperty(name)).toBe(true);
});
});
it('should return names which are enumerable', function () {
keys.forEach(function (name) {
expect(loopedValues.indexOf(name)).toNotBe(-1);
})
});
it('should throw error for non object', function () {
var e = {};
expect(function () {
try {
Object.keys(42)
} catch (err) {
throw e;
}
}).toThrow(e);
});
});
describe("Object.isExtensible", function () {
var obj = { };
it('should return true if object is extensible', function () {
expect(Object.isExtensible(obj)).toBe(true);
});
it('should return false if object is not extensible', function () {
expect(Object.isExtensible(Object.preventExtensions(obj))).toBe(false);
});
it('should return false if object is seal', function () {
expect(Object.isExtensible(Object.seal(obj))).toBe(false);
});
it('should return false if object is freeze', function () {
expect(Object.isExtensible(Object.freeze(obj))).toBe(false);
});
it('should throw error for non object', function () {
var e1 = {};
expect(function () {
try {
Object.isExtensible(42)
} catch (err) {
throw e1;
}
}).toThrow(e1);
});
});
});
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