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     27 
     28 // A reduced test case from Acid3 test 95.
     29 // When an object is assigned to an array length field,
     30 // it is converted to a number.
     31 
     32 function CheckSetArrayLength(x, expected) {
     33   var a = [];
     34   a.length = x;
     35 
     36   assertEquals("number", typeof a.length);
     37   assertEquals(expected, a.length);
     38 }
     39 
     40 CheckSetArrayLength(2147483648, 2147483648);
     41 CheckSetArrayLength("2147483648", 2147483648);
     42 CheckSetArrayLength(null, 0);
     43 CheckSetArrayLength(false, 0);
     44 CheckSetArrayLength(true, 1);
     45 CheckSetArrayLength({valueOf : function() { return 42; }}, 42);
     46 CheckSetArrayLength({toString : function() { return '42'; }}, 42);
     47 
     48 // Test invalid values
     49 assertThrows("var y = []; y.length = 'abc';");
     50 assertThrows("var y = []; y.length = undefined;");
     51 assertThrows("var y = []; y.length = {};");
     52 assertThrows("var y = []; y.length = -1;");
     53 assertThrows("var y = []; y.length = {valueOf:function() { throw new Error(); }};");
     54