Share JSON schema constants.

chrome/common/json_schema_validator_unittest_base.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/common/json_schema_validator_unittest_base.h"
 
 #include <cfloat>
 #include <cmath>
 #include <limits>
 
 #include "base/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/stringprintf.h"
 #include "base/values.h"
 #include "chrome/common/chrome_paths.h"
+#include "chrome/common/json_schema_constants.h"
 #include "chrome/common/json_schema_validator.h"
 
+namespace schema = json_schema_constants;
+
 namespace {
 
 #define TEST_SOURCE base::StringPrintf("%s:%i", __FILE__, __LINE__)
 
 Value* LoadValue(const std::string& filename) {
   FilePath path;
   PathService::Get(chrome::DIR_TEST_DATA, &path);
   path = path.AppendASCII("json_schema_validator").AppendASCII(filename);
   EXPECT_TRUE(file_util::PathExists(path));
 
@@ skipping 56 matching lines @@
 
   ASSERT_TRUE(schema.get());
   ASSERT_TRUE(instance.get());
 
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
   instance->Remove(instance->GetSize() - 1, NULL);
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
   instance->Append(new DictionaryValue());
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL, "1",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "number", "object"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kNumber,
+                     schema::kObject));
   instance->Remove(instance->GetSize() - 1, NULL);
 
   DictionaryValue* item = NULL;
   ASSERT_TRUE(instance->GetDictionary(0, &item));
   item->SetString("url", "xxxxxxxxxxx");
 
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL,
                  "0.url",
                  JSONSchemaValidator::FormatErrorMessage(
                      JSONSchemaValidator::kStringMaxLength, "10"));
 }
 
 void JSONSchemaValidatorTestBase::TestStringPattern() {
   // Regex patterns not supported in CPP validator.
   if (type_ == CPP)
     return;
 
   scoped_ptr<DictionaryValue> schema(new DictionaryValue());
-  schema->SetString("type", "string");
-  schema->SetString("pattern", "foo+");
+  schema->SetString(schema::kType, schema::kString);
+  schema->SetString(schema::kPattern, "foo+");
 
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateStringValue("foo")).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateStringValue("foooooo")).get(),
               schema.get(), NULL);
   ExpectNotValid(TEST_SOURCE,
                  scoped_ptr<Value>(Value::CreateStringValue("bar")).get(),
                  schema.get(), NULL, "",
@@ skipping 47 matching lines @@
   ExpectNotValid(TEST_SOURCE, instance.get(),
                  schema.get(), NULL, "", JSONSchemaValidator::kInvalidChoice);
 }
 
 void JSONSchemaValidatorTestBase::TestExtends() {
   // TODO(aa): JS only
 }
 
 void JSONSchemaValidatorTestBase::TestObject() {
   scoped_ptr<DictionaryValue> schema(new DictionaryValue());
-  schema->SetString("type", "object");
-  schema->SetString("properties.foo.type", "string");
-  schema->SetString("properties.bar.type", "integer");
+  schema->SetString(schema::kType, schema::kObject);
+  schema->SetString("properties.foo.type", schema::kString);
+  schema->SetString("properties.bar.type", schema::kInteger);
 
   scoped_ptr<DictionaryValue> instance(new DictionaryValue());
   instance->SetString("foo", "foo");
   instance->SetInteger("bar", 42);
 
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
 
   instance->SetBoolean("extra", true);
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL,
                  "extra", JSONSchemaValidator::kUnexpectedProperty);
 
   instance->Remove("extra", NULL);
   instance->Remove("bar", NULL);
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL, "bar",
                  JSONSchemaValidator::kObjectPropertyIsRequired);
 
   instance->SetString("bar", "42");
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL, "bar",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "integer", "string"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kInteger,
+                     schema::kString));
 
   DictionaryValue* additional_properties = new DictionaryValue();
-  additional_properties->SetString("type", "any");
-  schema->Set("additionalProperties", additional_properties);
+  additional_properties->SetString(schema::kType, schema::kAny);
+  schema->Set(schema::kAdditionalProperties, additional_properties);
 
   instance->SetInteger("bar", 42);
   instance->SetBoolean("extra", true);
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
 
   instance->SetString("extra", "foo");
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
 
-  additional_properties->SetString("type", "boolean");
+  additional_properties->SetString(schema::kType, schema::kBoolean);
   instance->SetBoolean("extra", true);
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
 
   instance->SetString("extra", "foo");
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL,
                  "extra", JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "boolean", "string"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kBoolean,
+                     schema::kString));
 
   DictionaryValue* properties = NULL;
   DictionaryValue* bar_property = NULL;
-  ASSERT_TRUE(schema->GetDictionary("properties", &properties));
+  ASSERT_TRUE(schema->GetDictionary(schema::kProperties, &properties));
   ASSERT_TRUE(properties->GetDictionary("bar", &bar_property));
 
-  bar_property->SetBoolean("optional", true);
+  bar_property->SetBoolean(schema::kOptional, true);
   instance->Remove("extra", NULL);
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
   instance->Remove("bar", NULL);
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
   instance->Set("bar", Value::CreateNullValue());
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL,
                  "bar", JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "integer", "null"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kInteger,
+                     schema::kNull));
   instance->SetString("bar", "42");
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL,
                  "bar", JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "integer", "string"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kInteger,
+                     schema::kString));
 }
 
 void JSONSchemaValidatorTestBase::TestTypeReference() {
   scoped_ptr<ListValue> types(LoadList("reference_types.json"));
   ASSERT_TRUE(types.get());
 
   scoped_ptr<DictionaryValue> schema(new DictionaryValue());
-  schema->SetString("type", "object");
-  schema->SetString("properties.foo.type", "string");
+  schema->SetString(schema::kType, schema::kObject);
+  schema->SetString("properties.foo.type", schema::kString);
   schema->SetString("properties.bar.$ref", "Max10Int");
   schema->SetString("properties.baz.$ref", "MinLengthString");
 
   scoped_ptr<DictionaryValue> schema_inline(new DictionaryValue());
-  schema_inline->SetString("type", "object");
-  schema_inline->SetString("properties.foo.type", "string");
+  schema_inline->SetString(schema::kType, schema::kObject);
+  schema_inline->SetString("properties.foo.type", schema::kString);
   schema_inline->SetString("properties.bar.id", "NegativeInt");
-  schema_inline->SetString("properties.bar.type", "integer");
+  schema_inline->SetString("properties.bar.type", schema::kInteger);
   schema_inline->SetInteger("properties.bar.maximum", 0);
   schema_inline->SetString("properties.baz.$ref", "NegativeInt");
 
   scoped_ptr<DictionaryValue> instance(new DictionaryValue());
   instance->SetString("foo", "foo");
   instance->SetInteger("bar", 4);
   instance->SetString("baz", "ab");
 
   scoped_ptr<DictionaryValue> instance_inline(new DictionaryValue());
   instance_inline->SetString("foo", "foo");
@@ skipping 48 matching lines @@
 
   instance->Remove(1, NULL);
   instance->Remove(1, NULL);
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL, "1",
                  JSONSchemaValidator::kArrayItemRequired);
 
   instance->Set(0, Value::CreateIntegerValue(42));
   instance->Append(Value::CreateIntegerValue(42));
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL, "0",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "string", "integer"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kString,
+                     schema::kInteger));
 
   DictionaryValue* additional_properties = new DictionaryValue();
-  additional_properties->SetString("type", "any");
-  schema->Set("additionalProperties", additional_properties);
+  additional_properties->SetString(schema::kType, schema::kAny);
+  schema->Set(schema::kAdditionalProperties, additional_properties);
   instance->Set(0, Value::CreateStringValue("42"));
   instance->Append(Value::CreateStringValue("anything"));
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
   instance->Set(2, new ListValue());
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
 
-  additional_properties->SetString("type", "boolean");
+  additional_properties->SetString(schema::kType, schema::kBoolean);
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL, "2",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "boolean", "array"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kBoolean,
+                     schema::kArray));
   instance->Set(2, Value::CreateBooleanValue(false));
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
 
   ListValue* items_schema = NULL;
   DictionaryValue* item0_schema = NULL;
-  ASSERT_TRUE(schema->GetList("items", &items_schema));
+  ASSERT_TRUE(schema->GetList(schema::kItems, &items_schema));
   ASSERT_TRUE(items_schema->GetDictionary(0, &item0_schema));
-  item0_schema->SetBoolean("optional", true);
+  item0_schema->SetBoolean(schema::kOptional, true);
   instance->Remove(2, NULL);
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
   // TODO(aa): I think this is inconsistent with the handling of NULL+optional
   // for objects.
   instance->Set(0, Value::CreateNullValue());
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
   instance->Set(0, Value::CreateIntegerValue(42));
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL, "0",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "string", "integer"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kString,
+                     schema::kInteger));
 }
 
 void JSONSchemaValidatorTestBase::TestArrayNonTuple() {
   scoped_ptr<DictionaryValue> schema(new DictionaryValue());
-  schema->SetString("type", "array");
-  schema->SetString("items.type", "string");
-  schema->SetInteger("minItems", 2);
-  schema->SetInteger("maxItems", 3);
+  schema->SetString(schema::kType, schema::kArray);
+  schema->SetString("items.type", schema::kString);
+  schema->SetInteger(schema::kMinItems, 2);
+  schema->SetInteger(schema::kMaxItems, 3);
 
   scoped_ptr<ListValue> instance(new ListValue());
   instance->Append(Value::CreateStringValue("x"));
   instance->Append(Value::CreateStringValue("x"));
 
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
   instance->Append(Value::CreateStringValue("x"));
   ExpectValid(TEST_SOURCE, instance.get(), schema.get(), NULL);
 
   instance->Append(Value::CreateStringValue("x"));
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
                      JSONSchemaValidator::kArrayMaxItems, "3"));
   instance->Remove(1, NULL);
   instance->Remove(1, NULL);
   instance->Remove(1, NULL);
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
                      JSONSchemaValidator::kArrayMinItems, "2"));
 
   instance->Remove(1, NULL);
   instance->Append(Value::CreateIntegerValue(42));
   ExpectNotValid(TEST_SOURCE, instance.get(), schema.get(), NULL, "1",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "string", "integer"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kString,
+                     schema::kInteger));
 }
 
 void JSONSchemaValidatorTestBase::TestString() {
   scoped_ptr<DictionaryValue> schema(new DictionaryValue());
-  schema->SetString("type", "string");
-  schema->SetInteger("minLength", 1);
-  schema->SetInteger("maxLength", 10);
+  schema->SetString(schema::kType, schema::kString);
+  schema->SetInteger(schema::kMinLength, 1);
+  schema->SetInteger(schema::kMaxLength, 10);
 
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateStringValue("x")).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateStringValue("xxxxxxxxxx")).get(),
               schema.get(), NULL);
 
   ExpectNotValid(TEST_SOURCE,
                  scoped_ptr<Value>(Value::CreateStringValue("")).get(),
                  schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
                      JSONSchemaValidator::kStringMinLength, "1"));
   ExpectNotValid(
       TEST_SOURCE,
       scoped_ptr<Value>(Value::CreateStringValue("xxxxxxxxxxx")).get(),
       schema.get(), NULL, "",
       JSONSchemaValidator::FormatErrorMessage(
           JSONSchemaValidator::kStringMaxLength, "10"));
 
 }
 
 void JSONSchemaValidatorTestBase::TestNumber() {
   scoped_ptr<DictionaryValue> schema(new DictionaryValue());
-  schema->SetString("type", "number");
-  schema->SetInteger("minimum", 1);
-  schema->SetInteger("maximum", 100);
+  schema->SetString(schema::kType, schema::kNumber);
+  schema->SetInteger(schema::kMinimum, 1);
+  schema->SetInteger(schema::kMaximum, 100);
   schema->SetInteger("maxDecimal", 2);
 
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateIntegerValue(1)).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateIntegerValue(50)).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateIntegerValue(100)).get(),
@@ skipping 10 matching lines @@
           JSONSchemaValidator::kNumberMinimum, "1"));
   ExpectNotValid(
       TEST_SOURCE,
       scoped_ptr<Value>(Value::CreateDoubleValue(100.1)).get(),
       schema.get(), NULL, "",
       JSONSchemaValidator::FormatErrorMessage(
           JSONSchemaValidator::kNumberMaximum, "100"));
 }
 
 void JSONSchemaValidatorTestBase::TestTypeClassifier() {
-  EXPECT_EQ("boolean", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(Value::CreateBooleanValue(true)).get()));
-  EXPECT_EQ("boolean", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(Value::CreateBooleanValue(false)).get()));
+  EXPECT_EQ(std::string(schema::kBoolean),
+            JSONSchemaValidator::GetJSONSchemaType(
+                scoped_ptr<Value>(Value::CreateBooleanValue(true)).get()));
+  EXPECT_EQ(std::string(schema::kBoolean),
+            JSONSchemaValidator::GetJSONSchemaType(
+                scoped_ptr<Value>(Value::CreateBooleanValue(false)).get()));
 
   // It doesn't matter whether the C++ type is 'integer' or 'real'. If the
   // number is integral and within the representable range of integers in
   // double, it's classified as 'integer'.
-  EXPECT_EQ("integer", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(Value::CreateIntegerValue(42)).get()));
-  EXPECT_EQ("integer", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(Value::CreateIntegerValue(0)).get()));
-  EXPECT_EQ("integer", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(Value::CreateDoubleValue(42)).get()));
-  EXPECT_EQ("integer", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(
-          Value::CreateDoubleValue(pow(2.0, DBL_MANT_DIG))).get()));
-  EXPECT_EQ("integer", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(
-          Value::CreateDoubleValue(pow(-2.0, DBL_MANT_DIG))).get()));
+  EXPECT_EQ(std::string(schema::kInteger),
+            JSONSchemaValidator::GetJSONSchemaType(
+                scoped_ptr<Value>(Value::CreateIntegerValue(42)).get()));
+  EXPECT_EQ(std::string(schema::kInteger),
+            JSONSchemaValidator::GetJSONSchemaType(
+                scoped_ptr<Value>(Value::CreateIntegerValue(0)).get()));
+  EXPECT_EQ(std::string(schema::kInteger),
+            JSONSchemaValidator::GetJSONSchemaType(
+                scoped_ptr<Value>(Value::CreateDoubleValue(42)).get()));
+  EXPECT_EQ(std::string(schema::kInteger),
+            JSONSchemaValidator::GetJSONSchemaType(scoped_ptr<Value>(
+                Value::CreateDoubleValue(pow(2.0, DBL_MANT_DIG))).get()));
+  EXPECT_EQ(std::string(schema::kInteger),
+            JSONSchemaValidator::GetJSONSchemaType(scoped_ptr<Value>(
+                Value::CreateDoubleValue(pow(-2.0, DBL_MANT_DIG))).get()));
 
   // "number" is only used for non-integral numbers, or numbers beyond what
   // double can accurately represent.
-  EXPECT_EQ("number", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(Value::CreateDoubleValue(88.8)).get()));
-  EXPECT_EQ("number", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(Value::CreateDoubleValue(
-          pow(2.0, DBL_MANT_DIG) * 2)).get()));
-  EXPECT_EQ("number", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(Value::CreateDoubleValue(
-          pow(-2.0, DBL_MANT_DIG) * 2)).get()));
+  EXPECT_EQ(std::string(schema::kNumber),
+            JSONSchemaValidator::GetJSONSchemaType(
+                scoped_ptr<Value>(Value::CreateDoubleValue(88.8)).get()));
+  EXPECT_EQ(std::string(schema::kNumber),
+            JSONSchemaValidator::GetJSONSchemaType(scoped_ptr<Value>(
+                Value::CreateDoubleValue(pow(2.0, DBL_MANT_DIG) * 2)).get()));
+  EXPECT_EQ(std::string(schema::kNumber),
+            JSONSchemaValidator::GetJSONSchemaType(scoped_ptr<Value>(
+                Value::CreateDoubleValue(pow(-2.0, DBL_MANT_DIG) * 2)).get()));
 
-  EXPECT_EQ("string", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(Value::CreateStringValue("foo")).get()));
-  EXPECT_EQ("array", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(new ListValue()).get()));
-  EXPECT_EQ("object", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(new DictionaryValue()).get()));
-  EXPECT_EQ("null", JSONSchemaValidator::GetJSONSchemaType(
-      scoped_ptr<Value>(Value::CreateNullValue()).get()));
+  EXPECT_EQ(std::string(schema::kString),
+            JSONSchemaValidator::GetJSONSchemaType(
+                scoped_ptr<Value>(Value::CreateStringValue("foo")).get()));
+  EXPECT_EQ(std::string(schema::kArray),
+            JSONSchemaValidator::GetJSONSchemaType(
+                scoped_ptr<Value>(new ListValue()).get()));
+  EXPECT_EQ(std::string(schema::kObject),
+            JSONSchemaValidator::GetJSONSchemaType(
+                scoped_ptr<Value>(new DictionaryValue()).get()));
+  EXPECT_EQ(std::string(schema::kNull),
+            JSONSchemaValidator::GetJSONSchemaType(
+                scoped_ptr<Value>(Value::CreateNullValue()).get()));
 }
 
 void JSONSchemaValidatorTestBase::TestTypes() {
   scoped_ptr<DictionaryValue> schema(new DictionaryValue());
 
   // valid
-  schema->SetString("type", "object");
+  schema->SetString(schema::kType, schema::kObject);
   ExpectValid(TEST_SOURCE, scoped_ptr<Value>(new DictionaryValue()).get(),
               schema.get(), NULL);
 
-  schema->SetString("type", "array");
+  schema->SetString(schema::kType, schema::kArray);
   ExpectValid(TEST_SOURCE, scoped_ptr<Value>(new ListValue()).get(),
               schema.get(), NULL);
 
-  schema->SetString("type", "string");
+  schema->SetString(schema::kType, schema::kString);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateStringValue("foobar")).get(),
               schema.get(), NULL);
 
-  schema->SetString("type", "number");
+  schema->SetString(schema::kType, schema::kNumber);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateDoubleValue(88.8)).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateDoubleValue(42)).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateIntegerValue(42)).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateIntegerValue(0)).get(),
               schema.get(), NULL);
 
-  schema->SetString("type", "integer");
+  schema->SetString(schema::kType, schema::kInteger);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateIntegerValue(42)).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateDoubleValue(42)).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateIntegerValue(0)).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(
                   Value::CreateDoubleValue(pow(2.0, DBL_MANT_DIG))).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(
                   Value::CreateDoubleValue(pow(-2.0, DBL_MANT_DIG))).get(),
               schema.get(), NULL);
 
-  schema->SetString("type", "boolean");
+  schema->SetString(schema::kType, schema::kBoolean);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateBooleanValue(false)).get(),
               schema.get(), NULL);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateBooleanValue(true)).get(),
               schema.get(), NULL);
 
-  schema->SetString("type", "null");
+  schema->SetString(schema::kType, schema::kNull);
   ExpectValid(TEST_SOURCE,
               scoped_ptr<Value>(Value::CreateNullValue()).get(),
               schema.get(), NULL);
 
   // not valid
-  schema->SetString("type", "object");
+  schema->SetString(schema::kType, schema::kObject);
   ExpectNotValid(TEST_SOURCE, scoped_ptr<Value>(new ListValue()).get(),
                  schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "object", "array"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kObject,
+                     schema::kArray));
 
-  schema->SetString("type", "object");
+  schema->SetString(schema::kType, schema::kObject);
   ExpectNotValid(TEST_SOURCE, scoped_ptr<Value>(Value::CreateNullValue()).get(),
                  schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "object", "null"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kObject,
+                     schema::kNull));
 
-  schema->SetString("type", "array");
+  schema->SetString(schema::kType, schema::kArray);
   ExpectNotValid(TEST_SOURCE,
                  scoped_ptr<Value>(Value::CreateIntegerValue(42)).get(),
                  schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "array", "integer"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kArray,
+                     schema::kInteger));
 
-  schema->SetString("type", "string");
+  schema->SetString(schema::kType, schema::kString);
   ExpectNotValid(TEST_SOURCE,
                  scoped_ptr<Value>(Value::CreateIntegerValue(42)).get(),
                  schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "string", "integer"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kString,
+                     schema::kInteger));
 
-  schema->SetString("type", "number");
+  schema->SetString(schema::kType, schema::kNumber);
   ExpectNotValid(TEST_SOURCE,
                  scoped_ptr<Value>(Value::CreateStringValue("42")).get(),
                  schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "number", "string"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kNumber,
+                     schema::kString));
 
-  schema->SetString("type", "integer");
+  schema->SetString(schema::kType, schema::kInteger);
   ExpectNotValid(TEST_SOURCE,
                  scoped_ptr<Value>(Value::CreateDoubleValue(88.8)).get(),
                  schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "integer", "number"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kInteger,
+                     schema::kNumber));
 
-  schema->SetString("type", "integer");
+  schema->SetString(schema::kType, schema::kInteger);
   ExpectNotValid(TEST_SOURCE,
                  scoped_ptr<Value>(Value::CreateDoubleValue(88.8)).get(),
                  schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "integer", "number"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kInteger,
+                     schema::kNumber));
 
-  schema->SetString("type", "boolean");
+  schema->SetString(schema::kType, schema::kBoolean);
   ExpectNotValid(TEST_SOURCE,
                  scoped_ptr<Value>(Value::CreateIntegerValue(1)).get(),
                  schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "boolean", "integer"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kBoolean,
+                     schema::kInteger));
 
-  schema->SetString("type", "null");
+  schema->SetString(schema::kType, schema::kNull);
   ExpectNotValid(TEST_SOURCE,
                  scoped_ptr<Value>(Value::CreateBooleanValue(false)).get(),
                  schema.get(), NULL, "",
                  JSONSchemaValidator::FormatErrorMessage(
-                     JSONSchemaValidator::kInvalidType, "null", "boolean"));
+                     JSONSchemaValidator::kInvalidType,
+                     schema::kNull,
+                     schema::kBoolean));
 }