Added simple tests for time limit and memory limit.

tests/memory_limit.phpt

@@ -0,0 +1,72 @@
+--TEST--
+Test V8::executeString() : Time limit
+--SKIPIF--
+<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+--FILE--
+<?php
+$JS = <<< EOT
+var text = "abcdefghijklmnopqrstuvwyxz0123456789";
+var memory = "";
+for (var i = 0; i < 1000000; ++i) {
+    memory += text;
+}
+EOT;
+
+$v8 = new V8Js();
+
+try {
+    var_dump($v8->executeString($JS, 'basic.js', V8Js::FLAG_NONE, 0, 10000000));
+} catch (V8JsMemoryLimitException $e) {
+    var_dump($e);
+}
+?>
+===EOF===
+--EXPECT--
+object(V8JsMemoryLimitException)#2 (7) {
+  ["message":protected]=>
+  string(46) "Script memory limit of 10000000 bytes exceeded"
+  ["string":"Exception":private]=>
+  string(0) ""
+  ["code":protected]=>
+  int(0)
+  ["file":protected]=>
+  string(36) "/var/www/v8js/tests/memory_limit.php"
+  ["line":protected]=>
+  int(13)
+  ["trace":"Exception":private]=>
+  array(1) {
+    [0]=>
+    array(6) {
+      ["file"]=>
+      string(36) "/var/www/v8js/tests/memory_limit.php"
+      ["line"]=>
+      int(13)
+      ["function"]=>
+      string(13) "executeString"
+      ["class"]=>
+      string(4) "V8Js"
+      ["type"]=>
+      string(2) "->"
+      ["args"]=>
+      array(5) {
+        [0]=>
+        string(125) "var text = "abcdefghijklmnopqrstuvwyxz0123456789";
+var memory = "";
+for (var i = 0; i < 1000000; ++i) {
+    memory += text;
+}"
+        [1]=>
+        string(8) "basic.js"
+        [2]=>
+        int(1)
+        [3]=>
+        int(0)
+        [4]=>
+        int(10000000)
+      }
+    }
+  }
+  ["previous":"Exception":private]=>
+  NULL
+}
+===EOF===

tests/time_limit.phpt

@@ -0,0 +1,69 @@
+--TEST--
+Test V8::executeString() : Time limit
+--SKIPIF--
+<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+--FILE--
+<?php
+
+$JS = <<< EOT
+var text = "abcdefghijklmnopqrstuvwyxz0123456789";
+for (var i = 0; i < 10000000; ++i) {
+    var encoded = encodeURI(text);
+}
+EOT;
+
+$v8 = new V8Js();
+
+try {
+    var_dump($v8->executeString($JS, 'basic.js', V8Js::FLAG_NONE, 1000));
+} catch (V8JsTimeLimitException $e) {
+    var_dump($e);
+}
+?>
+===EOF===
+--EXPECT--
+object(V8JsTimeLimitException)#2 (7) {
+  ["message":protected]=>
+  string(47) "Script time limit of 1000 milliseconds exceeded"
+  ["string":"Exception":private]=>
+  string(0) ""
+  ["code":protected]=>
+  int(0)
+  ["file":protected]=>
+  string(34) "/var/www/v8js/tests/time_limit.php"
+  ["line":protected]=>
+  int(13)
+  ["trace":"Exception":private]=>
+  array(1) {
+    [0]=>
+    array(6) {
+      ["file"]=>
+      string(34) "/var/www/v8js/tests/time_limit.php"
+      ["line"]=>
+      int(13)
+      ["function"]=>
+      string(13) "executeString"
+      ["class"]=>
+      string(4) "V8Js"
+      ["type"]=>
+      string(2) "->"
+      ["args"]=>
+      array(4) {
+        [0]=>
+        string(124) "var text = "abcdefghijklmnopqrstuvwyxz0123456789";
+for (var i = 0; i < 10000000; ++i) {
+    var encoded = encodeURI(text);
+}"
+        [1]=>
+        string(8) "basic.js"
+        [2]=>
+        int(1)
+        [3]=>
+        int(1000)
+      }
+    }
+  }
+  ["previous":"Exception":private]=>
+  NULL
+}
+===EOF===