Fix for issue 351 - lastIndexOf.

test/mjsunit/string-lastindexof.js

 // Copyright 2008 the V8 project authors. All rights reserved.
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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 var s = "test test test";
 
-assertEquals(5, s.lastIndexOf("test", 5));
-assertEquals(5, s.lastIndexOf("test", 6));
-assertEquals(0, s.lastIndexOf("test", 4));
-assertEquals(0, s.lastIndexOf("test", 0));
-assertEquals(-1, s.lastIndexOf("test", -1));
-assertEquals(10, s.lastIndexOf("test"));
-assertEquals(-1, s.lastIndexOf("notpresent"));
-assertEquals(-1, s.lastIndexOf());
-assertEquals(10, s.lastIndexOf("test", "not a number"));
+var MAX_DOUBLE = 1.7976931348623157e+308;
+var MIN_DOUBLE = -MAX_DOUBLE;
+var MAX_SMI = Math.pow(2,30)-1;
+var MIN_SMI = -Math.pow(2,30);
+
+assertEquals(10, s.lastIndexOf("test", Infinity), "tinf");
+assertEquals(10, s.lastIndexOf("test", MAX_DOUBLE), "tmaxdouble");
+assertEquals(10, s.lastIndexOf("test", MAX_SMI), "tmaxsmi");
+assertEquals(10, s.lastIndexOf("test", s.length * 2), "t2length");
+assertEquals(10, s.lastIndexOf("test", 15), "t15");
+assertEquals(10, s.lastIndexOf("test", 14), "t14");
+assertEquals(10, s.lastIndexOf("test", 10), "t10");
+assertEquals(5, s.lastIndexOf("test", 9), "t9");
+assertEquals(5, s.lastIndexOf("test", 6), "t6");
+assertEquals(5, s.lastIndexOf("test", 5), "t5");
+assertEquals(0, s.lastIndexOf("test", 4), "t4");
+assertEquals(0, s.lastIndexOf("test", 0), "t0");
+assertEquals(0, s.lastIndexOf("test", -1), "t-1");
+assertEquals(0, s.lastIndexOf("test", -s.length), "t-len");
+assertEquals(0, s.lastIndexOf("test", MIN_SMI), "tminsmi");
+assertEquals(0, s.lastIndexOf("test", MIN_DOUBLE), "tmindouble");
+assertEquals(0, s.lastIndexOf("test", -Infinity), "tneginf");
+assertEquals(10, s.lastIndexOf("test"), "t");
+assertEquals(-1, s.lastIndexOf("notpresent"), "n");
+assertEquals(-1, s.lastIndexOf(), "none");
+assertEquals(10, s.lastIndexOf("test", "not a number"), "nan");
+
+var longNonMatch = "overlong string that doesn't match";
+var longAlmostMatch = "test test test!";
+var longAlmostMatch2 = "!test test test";
+
+
+assertEquals(-1, s.lastIndexOf(longNonMatch), "long");
+assertEquals(-1, s.lastIndexOf(longNonMatch, 10), "longpos");
+assertEquals(-1, s.lastIndexOf(longNonMatch, NaN), "longnan");
+assertEquals(-1, s.lastIndexOf(longAlmostMatch), "tlong");
+assertEquals(-1, s.lastIndexOf(longAlmostMatch, 10), "tlongpos");
+assertEquals(-1, s.lastIndexOf(longAlmostMatch), "tlongnan");
+
+var nonInitialMatch = "est";
+
+assertEquals(-1, s.lastIndexOf(nonInitialMatch, 0), "noninit");
+assertEquals(-1, s.lastIndexOf(nonInitialMatch, -1), "noninitneg");
+assertEquals(-1, s.lastIndexOf(nonInitialMatch, MIN_SMI), "noninitminsmi");
+assertEquals(-1, s.lastIndexOf(nonInitialMatch, MIN_DOUBLE), "noninitmindbl");
+assertEquals(-1, s.lastIndexOf(nonInitialMatch, -Infinity), "noninitneginf");
 
 for (var i = s.length + 10; i >= 0; i--) {
   var expected = i < s.length ? i : s.length;
-  assertEquals(expected, s.lastIndexOf("", i));
+  assertEquals(expected, s.lastIndexOf("", i), "empty" + i);
 }
 
 
 var reString = "asdf[a-z]+(asdf)?";
 
-assertEquals(4, reString.lastIndexOf("[a-z]+"));
-assertEquals(10, reString.lastIndexOf("(asdf)?"));
+assertEquals(4, reString.lastIndexOf("[a-z]+"), "r4");
+assertEquals(10, reString.lastIndexOf("(asdf)?"), "r10");
 
-assertEquals(1, String.prototype.lastIndexOf.length);
+assertEquals(1, String.prototype.lastIndexOf.length, "length");