Check for integer overflow when validating API function arguments.

chrome/test/data/extensions/json_schema_test.js

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 function assert(truth) {
   if (!truth)
     throw new Error("Assertion failed.");
 }
 
 function assertValid(type, instance, schema, types) {
   var validator = new chromeHidden.JSONSchemaValidator();
@@ skipping 402 matching lines @@
                  [formatError("numberFiniteNotNan", ["Infinity"]),
                   formatError("numberMaxValue", [schema.maximum])
                  ]);
 
   assertNotValid("Number", Number.NEGATIVE_INFINITY, schema,
                  [formatError("numberFiniteNotNan", ["-Infinity"]),
                   formatError("numberMinValue", [schema.minimum])
                  ]);
 }
 
+function testIntegerBounds() {
+  assertValid("Number",           0, {type:"integer"});
+  assertValid("Number",          -1, {type:"integer"});
+  assertValid("Number",  2147483647, {type:"integer"});
+  assertValid("Number", -2147483648, {type:"integer"});
+  assertNotValid("Number",           0.5, {type:"integer"},
+                 [formatError("numberIntValue", [])]);
+  assertNotValid("Number", 10000000000,   {type:"integer"},
+                 [formatError("numberIntValue", [])]);
+  assertNotValid("Number",  2147483647.5, {type:"integer"},
+                 [formatError("numberIntValue", [])]);
+  assertNotValid("Number",  2147483648,   {type:"integer"},
+                 [formatError("numberIntValue", [])]);
+  assertNotValid("Number",  2147483649,   {type:"integer"},
+                 [formatError("numberIntValue", [])]);
+  assertNotValid("Number", -2147483649,   {type:"integer"},
+                 [formatError("numberIntValue", [])]);
+}
+
 function testType() {
   // valid
   assertValid("Type", {}, {type:"object"});
   assertValid("Type", [], {type:"array"});
   assertValid("Type", function(){}, {type:"function"});
   assertValid("Type", "foobar", {type:"string"});
   assertValid("Type", "", {type:"string"});
   assertValid("Type", 88.8, {type:"number"});
   assertValid("Type", 42, {type:"number"});
   assertValid("Type", 0, {type:"number"});
@@ skipping 21 matching lines @@
                  [formatError("invalidType", ["integer", "number"])]);
   assertNotValid("Type", 1, {type: "boolean"},
                  [formatError("invalidType", ["boolean", "integer"])]);
   assertNotValid("Type", false, {type: "null"},
                  [formatError("invalidType", ["null", "boolean"])]);
   assertNotValid("Type", undefined, {type: "null"},
                  [formatError("invalidType", ["null", "undefined"])]);
   assertNotValid("Type", {}, {type: "function"},
                  [formatError("invalidType", ["function", "object"])]);
 }