38   assertEquals("t", s().charAt());
39   assertEquals("t", s().charAt("string"));
40   assertEquals("t", s().charAt(null));
41   assertEquals("t", s().charAt(void 0));
42   assertEquals("t", s().charAt(false));
43   assertEquals("e", s().charAt(true));
44   assertEquals("", s().charAt(-1));
45   assertEquals("", s().charAt(len));
46   assertEquals("", s().charAt(slowIndexOutOfRange));
47   assertEquals("", s().charAt(1/0));
48   assertEquals("", s().charAt(-1/0));
49   assertEquals("t", s().charAt(0));
50   assertEquals("t", s().charAt(-0.0));
51   assertEquals("t", s().charAt(-0.1));
52   assertEquals("t", s().charAt(0.4));
53   assertEquals("e", s().charAt(slowIndex1));
54   assertEquals("s", s().charAt(slowIndex2));
55   assertEquals("t", s().charAt(3));
56   assertEquals("t", s().charAt(3.4));
57   assertEquals("t", s().charAt(NaN));
87   alpha[i] = c.charAt(0);
93   assertEquals(alpha[i], alphaStr.charAt(i));
94   assertEquals(String.fromCharCode(i), alphaStr.charAt(i));
99   charAt: String.prototype.charAt,  property
106   assertEquals("0", o.charAt(0));
107   assertEquals("1", o.charAt(1));
108   assertEquals("1", o.charAt(1.4));
109   assertEquals("1", o.charAt(slowIndex1));
110   assertEquals("2", o.charAt(2));
111   assertEquals("2", o.charAt(slowIndex2));
118   assertEquals("", o.charAt(-1));
119   assertEquals("", o.charAt(-1.4));
120   assertEquals("", o.charAt(10));
121   assertEquals("", o.charAt(slowIndexOutOfRange));
146       result = o.charAt(1);
195       result = o.charAt(index);
232       String.prototype.charAt = function() { return "%"; };  method in String
234     result = s.charAt(1);
238   delete String.prototype.charAt;  // Restore the default.  method in delete