diff --git a/buffet/commands/schema_utils_unittest.cc b/buffet/commands/schema_utils_unittest.cc
new file mode 100644
index 0000000..6918186
--- /dev/null
+++ b/buffet/commands/schema_utils_unittest.cc
@@ -0,0 +1,210 @@
+// Copyright 2014 The Chromium OS 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 <memory>
+#include <string>
+#include <vector>
+
+#include <base/json/json_reader.h>
+#include <base/json/json_writer.h>
+#include <base/values.h>
+#include <gtest/gtest.h>
+
+#include "buffet/commands/object_schema.h"
+#include "buffet/commands/prop_types.h"
+#include "buffet/commands/prop_values.h"
+#include "buffet/commands/schema_utils.h"
+
+namespace {
+// Helper method to create base::Value from a string as a smart pointer.
+// For ease of definition in C++ code, double-quotes in the source definition
+// are replaced with apostrophes.
+std::unique_ptr<base::Value> CreateValue(const char* json) {
+  std::string json2(json);
+  // Convert apostrophes to double-quotes so JSONReader can parse the string.
+  std::replace(json2.begin(), json2.end(), '\'', '"');
+  return std::unique_ptr<base::Value>(base::JSONReader::Read(json2));
+}
+
+// Helper method to create a JSON dictionary object from a string.
+std::unique_ptr<base::DictionaryValue> CreateDictionaryValue(const char* json) {
+  std::string json2(json);
+  std::replace(json2.begin(), json2.end(), '\'', '"');
+  base::Value* value = base::JSONReader::Read(json2);
+  base::DictionaryValue* dict;
+  value->GetAsDictionary(&dict);
+  return std::unique_ptr<base::DictionaryValue>(dict);
+}
+
+// Converts a JSON value to a string. It also converts double-quotes to
+// apostrophes for easy comparisons in C++ source code.
+std::string ValueToString(const base::Value* value) {
+  std::string json;
+  base::JSONWriter::Write(value, &json);
+  std::replace(json.begin(), json.end(), '"', '\'');
+  return json;
+}
+
+}  // namespace
+
+TEST(CommandSchemaUtils, TypedValueToJson_Scalar) {
+  EXPECT_EQ("true",
+            ValueToString(buffet::TypedValueToJson(true, nullptr).get()));
+  EXPECT_EQ("false",
+            ValueToString(buffet::TypedValueToJson(false, nullptr).get()));
+
+  EXPECT_EQ("0", ValueToString(buffet::TypedValueToJson(0, nullptr).get()));
+  EXPECT_EQ("-10", ValueToString(buffet::TypedValueToJson(-10, nullptr).get()));
+  EXPECT_EQ("20", ValueToString(buffet::TypedValueToJson(20, nullptr).get()));
+
+  EXPECT_EQ("0.0", ValueToString(buffet::TypedValueToJson(0.0, nullptr).get()));
+  EXPECT_EQ("1.2", ValueToString(buffet::TypedValueToJson(1.2, nullptr).get()));
+
+  EXPECT_EQ("'abc'",
+            ValueToString(buffet::TypedValueToJson(std::string("abc"),
+                                                   nullptr).get()));
+
+  std::vector<bool> bool_array{true, false};
+  EXPECT_EQ("[true,false]",
+            ValueToString(buffet::TypedValueToJson(bool_array, nullptr).get()));
+
+  std::vector<int> int_array{1, 2, 5};
+  EXPECT_EQ("[1,2,5]",
+            ValueToString(buffet::TypedValueToJson(int_array, nullptr).get()));
+
+  std::vector<double> dbl_array{1.1, 2.2};
+  EXPECT_EQ("[1.1,2.2]",
+            ValueToString(buffet::TypedValueToJson(dbl_array, nullptr).get()));
+
+  std::vector<std::string> str_array{"a", "bc"};
+  EXPECT_EQ("['a','bc']",
+            ValueToString(buffet::TypedValueToJson(str_array, nullptr).get()));
+}
+
+TEST(CommandSchemaUtils, TypedValueToJson_Object) {
+  buffet::IntPropType int_type;
+  buffet::native_types::Object object;
+
+  object.insert(std::make_pair("width", int_type.CreateValue(640)));
+  object.insert(std::make_pair("height", int_type.CreateValue(480)));
+  EXPECT_EQ("{'height':480,'width':640}",
+            ValueToString(buffet::TypedValueToJson(object, nullptr).get()));
+}
+
+TEST(CommandSchemaUtils, TypedValueFromJson_Bool) {
+  bool value;
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("true").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_TRUE(value);
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("false").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_FALSE(value);
+
+  buffet::ErrorPtr error;
+  EXPECT_FALSE(buffet::TypedValueFromJson(CreateValue("0").get(), nullptr,
+                                          &value, &error));
+  EXPECT_EQ("type_mismatch", error->GetCode());
+  error.reset();
+}
+
+TEST(CommandSchemaUtils, TypedValueFromJson_Int) {
+  int value;
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("0").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_EQ(0, value);
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("23").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_EQ(23, value);
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("-1234").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_EQ(-1234, value);
+
+  buffet::ErrorPtr error;
+  EXPECT_FALSE(buffet::TypedValueFromJson(CreateValue("'abc'").get(), nullptr,
+                                          &value, &error));
+  EXPECT_EQ("type_mismatch", error->GetCode());
+  error.reset();
+}
+
+TEST(CommandSchemaUtils, TypedValueFromJson_Double) {
+  double value;
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("0").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_DOUBLE_EQ(0.0, value);
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("0.0").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_DOUBLE_EQ(0.0, value);
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("23").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_EQ(23.0, value);
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("23.1").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_EQ(23.1, value);
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("-1.23E+02").get(),
+                                         nullptr, &value, nullptr));
+  EXPECT_EQ(-123.0, value);
+
+  buffet::ErrorPtr error;
+  EXPECT_FALSE(buffet::TypedValueFromJson(CreateValue("'abc'").get(), nullptr,
+                                          &value, &error));
+  EXPECT_EQ("type_mismatch", error->GetCode());
+  error.reset();
+}
+
+TEST(CommandSchemaUtils, TypedValueFromJson_String) {
+  std::string value;
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("''").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_EQ("", value);
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("'23'").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_EQ("23", value);
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(CreateValue("'abc'").get(), nullptr,
+                                         &value, nullptr));
+  EXPECT_EQ("abc", value);
+
+  buffet::ErrorPtr error;
+  EXPECT_FALSE(buffet::TypedValueFromJson(CreateValue("12").get(), nullptr,
+                                          &value, &error));
+  EXPECT_EQ("type_mismatch", error->GetCode());
+  error.reset();
+}
+
+TEST(CommandSchemaUtils, TypedValueFromJson_Object) {
+  buffet::native_types::Object value;
+  buffet::ObjectSchema schema;
+
+  auto age_prop = std::make_shared<buffet::IntPropType>();
+  age_prop->AddMinMaxConstraint(0, 150);
+  schema.AddProp("age", age_prop);
+
+  auto name_prop = std::make_shared<buffet::StringPropType>();
+  name_prop->AddLengthConstraint(1, 30);
+  schema.AddProp("name", name_prop);
+
+  EXPECT_TRUE(buffet::TypedValueFromJson(
+      CreateValue("{'age':20,'name':'Bob'}").get(), &schema, &value, nullptr));
+  buffet::native_types::Object value2;
+  value2.insert(std::make_pair("age", age_prop->CreateValue(20)));
+  value2.insert(std::make_pair("name",
+                               name_prop->CreateValue(std::string("Bob"))));
+  EXPECT_EQ(value2, value);
+
+  buffet::ErrorPtr error;
+  EXPECT_FALSE(buffet::TypedValueFromJson(CreateValue("'abc'").get(), nullptr,
+                                          &value, &error));
+  EXPECT_EQ("type_mismatch", error->GetCode());
+  error.reset();
+}