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      1 // Copyright 2009 the V8 project authors. All rights reserved.
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      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
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      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
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     11 //       with the distribution.
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     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
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     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 // Test ES5 section 15.2.3.4 Object.getOwnPropertyNames.
     29 
     30 // Check simple cases.
     31 var obj = { a: 1, b: 2};
     32 var propertyNames = Object.getOwnPropertyNames(obj);
     33 propertyNames.sort();
     34 assertEquals(2, propertyNames.length);
     35 assertEquals("a", propertyNames[0]);
     36 assertEquals("b", propertyNames[1]);
     37 
     38 var obj = { a: function(){}, b: function(){} };
     39 var propertyNames = Object.getOwnPropertyNames(obj);
     40 propertyNames.sort();
     41 assertEquals(2, propertyNames.length);
     42 assertEquals("a", propertyNames[0]);
     43 assertEquals("b", propertyNames[1]);
     44 
     45 // Check slow case
     46 var obj = { a: 1, b: 2, c: 3 };
     47 delete obj.b;
     48 var propertyNames = Object.getOwnPropertyNames(obj)
     49 propertyNames.sort();
     50 assertEquals(2, propertyNames.length);
     51 assertEquals("a", propertyNames[0]);
     52 assertEquals("c", propertyNames[1]);
     53 
     54 // Check that non-enumerable properties are being returned.
     55 var propertyNames = Object.getOwnPropertyNames([1, 2]);
     56 propertyNames.sort();
     57 assertEquals(3, propertyNames.length);
     58 assertEquals("0", propertyNames[0]);
     59 assertEquals("1", propertyNames[1]);
     60 assertEquals("string", typeof propertyNames[0]);
     61 assertEquals("string", typeof propertyNames[1]);
     62 assertEquals("length", propertyNames[2]);
     63 
     64 // Check that no proto properties are returned.
     65 var obj = { foo: "foo" };
     66 obj.__proto__ = { bar: "bar" };
     67 propertyNames = Object.getOwnPropertyNames(obj);
     68 propertyNames.sort();
     69 assertEquals(1, propertyNames.length);
     70 assertEquals("foo", propertyNames[0]);
     71 
     72 // Check that getter properties are returned.
     73 var obj = {};
     74 obj.__defineGetter__("getter", function() {});
     75 propertyNames = Object.getOwnPropertyNames(obj);
     76 propertyNames.sort();
     77 assertEquals(1, propertyNames.length);
     78 assertEquals("getter", propertyNames[0]);
     79 
     80 // Check that implementation does not access Array.prototype.
     81 var savedConcat = Array.prototype.concat;
     82 Array.prototype.concat = function() { return []; }
     83 propertyNames = Object.getOwnPropertyNames({0: 'foo', bar: 'baz'});
     84 assertEquals(2, propertyNames.length);
     85 assertEquals('0', propertyNames[0]);
     86 assertEquals('bar', propertyNames[1]);
     87 assertSame(Array.prototype, propertyNames.__proto__);
     88 Array.prototype.concat = savedConcat;
     89 
     90 assertEquals(Object.getOwnPropertyNames(4), []);
     91 assertEquals(Object.getOwnPropertyNames("foo"), ["0", "1", "2", "length"]);
     92 assertEquals(Object.getOwnPropertyNames(true), []);
     93 
     94 try {
     95   Object.getOwnPropertyNames(undefined);
     96   assertTrue(false);
     97 } catch (e) {
     98   assertTrue(/Cannot convert undefined or null to object/.test(e));
     99 }
    100 
    101 try {
    102   Object.getOwnPropertyNames(null);
    103   assertTrue(false);
    104 } catch (e) {
    105   assertTrue(/Cannot convert undefined or null to object/.test(e));
    106 }
    107